:root{--bg:#f4f7fb;--panel-alt:#f8fafc;--line:#dfeaf5;--heading:#1c2a39;--text:#2e3d4d;--muted:#627387;--primary:#2f80ed;--primary-dark:#1f5fc5;--primary-soft:#eaf3ff;--green:#22b07d;--green-soft:#eafaf3;--orange:#ffb93d;--orange-soft:#fff4db;--purple:#8d6de4;--purple-soft:#f1ebff;--red:#eb5a5a;--shadow:0 8px 22px rgba(34,68,105,.08);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Noto Sans Georgian,sans-serif;background:var(--bg)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.container,.page-shell{max-width:1280px;margin:0 auto;padding:24px 20px 60px}.container{padding-top:0;padding-bottom:0}.header{position:-webkit-sticky;position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line)}.header-inner{margin:auto;padding:10px 18px;gap:18px}.brand,.header-inner{display:flex;align-items:center}.brand{gap:8px;font-weight:800;white-space:nowrap}.brand-mark{width:38px;height:38px;display:grid;place-items:center;border-radius:11px;background:var(--primary);color:#fff;font-size:20px}.main-nav{display:flex;align-items:center;gap:4px;flex:1 1}.nav-link{padding:9px 8px;border-radius:9px;font-size:.82rem;font-weight:600;white-space:nowrap}.nav-link:hover{background:var(--primary-soft);color:var(--primary-dark)}.header-actions{display:flex;align-items:center;gap:8px}.global-search{position:relative}.search-box{display:flex;align-items:center;gap:7px;min-width:175px;padding:0 10px;height:40px;background:var(--panel-alt);border:1px solid var(--line);border-radius:11px}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--heading)}.search-results{position:absolute;right:0;top:46px;width:340px;max-width:85vw;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 45px rgba(30,55,80,.18);overflow:hidden;z-index:60}.search-result{display:flex;justify-content:space-between;gap:12px;padding:11px 13px;border-bottom:1px solid var(--line);font-size:.86rem}.search-result:hover{background:var(--primary-soft)}.search-result small{white-space:nowrap}.search-empty{padding:14px;color:var(--muted)}.action-btn,.ghost-btn,.primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 14px;border-radius:11px;border:1px solid transparent;font-weight:700}.action-btn,.primary-btn{color:#fff}.ghost-btn,.secondary-btn{background:#fff;border-color:var(--line);color:var(--heading)}.hero-box,.info-card,.practice-card,.skill-card,.stat-card,.video-card,.worksheet-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-box{display:grid;grid-template-columns:1.25fr .75fr;grid-gap:28px;gap:28px;padding:30px;margin-bottom:26px}.hero-copy h1{font-size:clamp(2rem,4vw,3.3rem);margin:8px 0 12px}.hero-copy p,.page-subtitle{color:var(--muted);line-height:1.7}.eyebrow{color:var(--primary-dark);font-weight:800}.card-actions,.hero-actions{display:flex;gap:10px;flex-wrap:wrap}.hero-visual{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px;align-content:center}.visual-card{min-height:95px;border-radius:16px;display:grid;place-items:center;font-size:1.55rem;font-weight:800}.visual-card.blue{background:var(--primary-soft);color:var(--primary-dark)}.visual-card.green{background:var(--green-soft);color:#087553}.visual-card.orange{background:var(--orange-soft);color:#9a6800}.content-block{margin-top:30px}.page-top,.section-heading-row,.skill-page-header{display:flex;align-items:center;justify-content:space-between;gap:16px}.section-heading-row h2{margin:0}.section-heading-row>a{font-weight:700}.dashboard-stats,.game-grid,.grade-grid,.info-grid,.skill-grid,.teacher-class-grid,.video-grid,.worksheet-grid{display:grid;grid-gap:16px;gap:16px;margin-top:18px}.game-grid{grid-template-columns:repeat(4,1fr)}.grade-grid{grid-template-columns:repeat(5,1fr)}.info-grid,.skill-grid,.teacher-class-grid,.video-grid,.worksheet-grid{grid-template-columns:repeat(3,1fr)}.dashboard-stats{grid-template-columns:repeat(4,1fr)}.info-card,.stat-card{padding:18px}.stat-card span{display:block;color:var(--muted);font-size:.85rem}.stat-card strong{font-size:1.8rem}.breadcrumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:.82rem;margin-bottom:14px}.category-box,.search-panel{margin-top:22px;background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:20px}.category-list{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:14px;gap:14px}.skill-item{padding:15px;background:var(--panel-alt);border:1px solid var(--line);border-radius:14px}.skill-item h4{margin:5px 0}.card-links,.mini-stat,.skill-meta{display:flex;justify-content:space-between;align-items:center;gap:10px}.skill-meta{color:var(--muted);font-size:.78rem}.search-controls{display:flex;gap:10px;flex-wrap:wrap}.answer-row input,.search-controls input,.search-controls select{min-height:46px;border:1px solid var(--line);border-radius:11px;padding:0 13px;background:#fff}.search-controls input,.search-controls select{flex:1 1 180px}.skill-card,.video-card,.worksheet-card{padding:18px}.badge{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:.72rem;font-weight:700}.badge.blue{background:var(--primary-soft);color:var(--primary-dark)}.badge.green{background:var(--green-soft);color:#0b7a56}.badge.orange{background:var(--orange-soft);color:#a97100}.badge.purple{background:var(--purple-soft);color:var(--purple)}.practice-shell{display:grid;grid-template-columns:1.3fr .7fr;grid-gap:22px;gap:22px;margin-top:28px}.practice-card{padding:24px}.expression{display:grid;place-items:center;min-height:110px;border-radius:18px;background:var(--panel-alt);font-size:clamp(2rem,4vw,3.2rem);font-weight:800;margin:18px 0}.answer-row{display:flex;gap:10px;flex-wrap:wrap}.answer-row input{flex:1 1 180px}.status-line{margin-top:16px;min-height:24px;font-weight:700}.status-line.success{color:var(--green)}.status-line.error{color:var(--red)}.progress-box{display:grid;grid-gap:14px;gap:14px}.mini-stat{border-bottom:1px solid var(--line);padding-bottom:10px}.footer{margin-top:40px;background:#122131;color:#fff}.footer-inner{max-width:1280px;margin:auto;padding:42px 20px;display:grid;grid-template-columns:1.5fr repeat(3,1fr);grid-gap:24px;gap:24px}.footer a,.footer p{display:block;margin:8px 0;color:rgba(255,255,255,.8)}.mobile-menu,.mobile-nav-panel{display:none}@media(max-width:1320px){.main-nav{display:none}.mobile-menu{display:inline-flex}.header-actions{margin-left:auto}.game-grid,.grade-grid{grid-template-columns:repeat(3,1fr)}.dashboard-stats,.skill-grid,.teacher-class-grid,.video-grid,.worksheet-grid{grid-template-columns:repeat(2,1fr)}.practice-shell{grid-template-columns:1fr}.mobile-nav-panel{display:grid;position:absolute;left:0;right:0;top:100%;padding:16px 20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);grid-gap:4px;gap:4px}.mobile-nav-panel>a{padding:11px;border-radius:10px}.mobile-nav-panel>a:hover{background:var(--primary-soft)}.mobile-nav-panel .global-search{margin-bottom:8px}.mobile-nav-panel .search-box{width:100%}.mobile-auth-row{display:flex;gap:10px;padding-top:8px}.mobile-auth-row a{flex:1 1;text-align:center;padding:10px;border:1px solid var(--line);border-radius:10px}}@media(max-width:720px){.page-shell{padding:18px 14px 44px}.hero-box{grid-template-columns:1fr;padding:20px}.hero-actions{flex-direction:column}.category-list,.footer-inner,.game-grid,.grade-grid,.info-grid,.skill-grid,.teacher-class-grid,.video-grid,.worksheet-grid{grid-template-columns:1fr}.dashboard-stats{grid-template-columns:repeat(2,1fr)}.header-inner{padding:9px 12px}.header-actions>.ghost-btn:not(.mobile-menu),.header-actions>.global-search,.header-actions>.primary-btn{display:none}.brand-text{font-size:.92rem}.page-top,.skill-page-header{align-items:flex-start;flex-direction:column}.skill-page-header h1{max-width:100%;overflow-wrap:anywhere}.breadcrumbs a{display:inline-flex;align-items:center;min-height:44px}.hero-visual{grid-template-columns:repeat(3,1fr)}.visual-card{min-height:70px;font-size:1rem}.search-results{left:0;right:auto;width:calc(100vw - 40px)}}.grade-practice-page{max-width:1180px}.grade-practice-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;padding:34px 0 26px;border-bottom:1px solid var(--line)}.grade-practice-heading h1{max-width:760px;margin:7px 0 12px;font-size:2.45rem;line-height:1.18}.grade-practice-heading p{max-width:760px;margin:0;color:var(--muted);line-height:1.75}.grade-practice-total{min-width:170px;padding-left:22px;border-left:3px solid var(--orange);display:grid;grid-gap:2px;gap:2px}.grade-practice-total strong{font-size:2.2rem}.grade-practice-total span{color:var(--muted);font-size:.86rem}.grade-tabs{display:grid;grid-template-columns:repeat(10,minmax(88px,1fr));grid-gap:6px;gap:6px;margin:24px 0 30px;overflow-x:auto;padding-bottom:5px}.grade-tab{min-width:88px;min-height:94px;padding:10px 7px;border:1px solid var(--line);background:#fff;color:var(--heading);display:grid;place-items:center;align-content:center;grid-gap:2px;gap:2px}.grade-tab b{font-size:1.25rem;color:var(--primary-dark)}.grade-tab span{font-size:.72rem;font-weight:700;white-space:nowrap}.grade-tab small{font-size:.65rem;color:var(--muted)}.grade-tab:hover{border-color:#9fc6f7;background:var(--primary-soft)}.grade-tab.active{border-color:var(--primary);color:#fff}.grade-tab.active b,.grade-tab.active small{color:#fff}.grade-catalog-toolbar{display:grid;grid-template-columns:minmax(170px,1fr) minmax(280px,430px) auto;align-items:center;grid-gap:20px;gap:20px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.grade-catalog-toolbar h2{margin:3px 0 0}.grade-skill-search{height:46px;display:flex;align-items:center;gap:8px;padding:0 13px;border:1px solid var(--line);border-radius:8px;background:#fff}.grade-skill-search input{width:100%;border:0;outline:0;background:transparent}.visible-skill-count{color:var(--muted);white-space:nowrap}.visible-skill-count strong{color:var(--heading)}.grade-catalog-groups{margin-top:12px}.grade-catalog-group{display:grid;grid-template-columns:220px minmax(0,1fr);grid-gap:28px;gap:28px;padding:27px 0;border-bottom:1px solid var(--line);scroll-margin-top:90px}.grade-catalog-group>header h2{margin:0 0 5px;font-size:1.05rem}.grade-catalog-group>header span{color:var(--muted);font-size:.78rem}.grade-catalog-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:8px;gap:8px}.grade-catalog-skill{min-height:54px;display:grid;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;grid-gap:10px;gap:10px;padding:8px 11px;border:1px solid var(--line);background:#fff}.grade-catalog-skill:hover{border-color:#9fc6f7;background:var(--primary-soft)}.catalog-skill-code{color:var(--primary-dark);font-size:.76rem;font-weight:800}.catalog-skill-title{min-width:0;font-size:.82rem;font-weight:650;line-height:1.35}.catalog-skill-action{display:flex;align-items:center;gap:5px;color:var(--primary-dark);font-size:.73rem;font-weight:800;white-space:nowrap}.catalog-skill-action b{font-size:1.2rem}.grade-practice-page .catalog-empty{margin-top:30px;padding:50px 20px;border:1px dashed #b8cbe0;border-radius:8px;text-align:center;background:#fff}.grade-practice-page .catalog-empty h2{margin:0 0 8px}.grade-practice-page .catalog-empty p{margin:0;color:var(--muted)}@media(max-width:980px){.grade-tabs{grid-template-columns:repeat(10,100px)}.grade-catalog-group{grid-template-columns:170px minmax(0,1fr)}.grade-catalog-list{grid-template-columns:1fr}}@media(max-width:720px){.grade-practice-heading{align-items:flex-start;flex-direction:column;padding-top:20px}.grade-practice-heading h1{font-size:2rem}.grade-practice-total{padding-left:14px}.grade-catalog-toolbar{grid-template-columns:1fr}.grade-skill-search{width:100%}.grade-catalog-group{gap:12px}.grade-catalog-group,.grade-catalog-list{grid-template-columns:1fr}.grade-catalog-skill{grid-template-columns:50px minmax(0,1fr) auto}.catalog-skill-action{font-size:0}.catalog-skill-action b{font-size:1.25rem}}.info-page{max-width:900px}.info-page-header{padding:28px 0 24px;border-bottom:1px solid var(--line)}.info-page-header h1{margin:6px 0 10px;font-size:2.35rem}.info-page-header p{max-width:760px;margin:0;color:var(--muted);line-height:1.75}.info-page-kicker{margin:28px 0 0;color:var(--primary-dark);font-size:.78rem;font-weight:800}.info-page-sections{display:grid;grid-gap:0;gap:0}.info-page-sections section{padding:24px 0;border-bottom:1px solid var(--line)}.info-page-sections h2{margin:0 0 8px;font-size:1.15rem}.info-page-sections p{margin:0;color:var(--muted);line-height:1.75}.info-page-actions{display:flex;gap:10px;flex-wrap:wrap;padding-top:24px}.printable-worksheet{max-width:900px}.printable-worksheet-header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:22px 0;border-bottom:2px solid var(--heading)}.printable-worksheet-header h1{margin:5px 0 10px}.printable-worksheet-header p{margin:0;color:var(--muted)}.worksheet-question-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:0 44px;gap:0 44px;margin:26px 0;padding-left:28px}.worksheet-question-list li{min-height:112px;padding:0 0 22px 8px;line-height:1.55}.worksheet-answer-line{height:38px;margin-top:14px;border-bottom:1px solid #8ea0b3}.worksheet-answer-key{padding:18px;border:1px solid var(--line);border-radius:8px;background:#fff}.worksheet-answer-key h2{margin:0 0 8px;font-size:1rem}.worksheet-answer-key p{margin:0;line-height:1.8}.print-button{min-width:110px}@media(max-width:720px){.printable-worksheet-header{flex-direction:column}.worksheet-question-list{grid-template-columns:1fr}}@media print{.worksheet-screen-only{display:none!important}.printable-worksheet{max-width:none;padding:0;color:#000;background:#fff}.printable-worksheet-header{padding-top:0}.worksheet-question-list{gap:0 32px}.worksheet-answer-key,.worksheet-question-list li{page-break-inside:avoid;break-inside:avoid}.worksheet-answer-key{border-color:#777}body{background:#fff}}@media(max-width:430px){.dashboard-stats{grid-template-columns:1fr}.hero-copy h1{font-size:1.9rem}.game-grid{grid-template-columns:1fr}.header-inner{gap:8px}}.happy-hero{background:radial-gradient(circle at 92% 10%,#fff0ba 0,transparent 26%),radial-gradient(circle at 75% 90%,#dff8eb 0,transparent 30%),linear-gradient(135deg,#fff,#f4f9ff)}.hero-trust{display:flex;gap:14px;flex-wrap:wrap;margin-top:20px;color:var(--muted);font-size:.78rem;font-weight:700}.info-icon{font-size:2rem}.section-heading-row>div h2{margin:3px 0 0}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:16px;gap:16px;margin-top:18px}.topic-card{--topic:#2f80ed;--topic-soft:#eaf3ff;display:flex;gap:16px;min-height:190px;padding:20px;border:1px solid color-mix(in srgb,var(--topic) 24%,white);border-radius:22px;background:linear-gradient(145deg,#fff 25%,var(--topic-soft));box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}.topic-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(34,68,105,.14)}.choice-btn:focus-visible,.topic-card:focus-visible{outline:4px solid rgba(47,128,237,.25);outline-offset:3px}.topic-card h3{margin:7px 0;font-size:1.12rem}.topic-card p{margin:0 0 13px;color:var(--muted);line-height:1.55;font-size:.88rem}.topic-emoji{display:grid;place-items:center;flex:0 0 54px;width:54px;height:54px;border-radius:17px;background:#fff;font-size:1.8rem;box-shadow:0 8px 18px rgba(32,56,85,.1)}.topic-grade{font-size:.72rem}.topic-grade,.topic-link{color:var(--topic);font-weight:800}.topic-link{font-size:.82rem}.topic-green{--topic:#138a63;--topic-soft:#eafaf3}.topic-orange{--topic:#b66d00;--topic-soft:#fff3d6}.topic-purple{--topic:#7554cf;--topic-soft:#f1ebff}.topic-pink{--topic:#c14879;--topic-soft:#ffeaf2}.topic-teal{--topic:#087f8c;--topic-soft:#e4f9fb}.topics-hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:32px;border-radius:24px;background:linear-gradient(135deg,#eaf3ff,#f7efff 55%,#fff3d6);border:1px solid var(--line);box-shadow:var(--shadow)}.topics-hero h1{font-size:clamp(2rem,4vw,3.2rem);margin:7px 0}.topics-hero p{max-width:720px;margin:0;color:var(--muted);line-height:1.7}.topics-hero-icons{display:flex;gap:8px}.topics-hero-icons span{display:grid;place-items:center;width:68px;height:68px;border-radius:20px;background:#fff;font-size:2rem;box-shadow:var(--shadow);transform:rotate(4deg)}.topics-hero-icons span:nth-child(2){transform:rotate(-5deg) translateY(-12px)}.happy-note{color:var(--muted);font-size:.8rem;font-weight:700}.topic-detail-hero{--topic:#2f80ed;--topic-soft:#eaf3ff;display:flex;align-items:center;gap:20px;padding:26px;border-radius:24px;background:linear-gradient(135deg,#fff,var(--topic-soft));border:1px solid var(--line);box-shadow:var(--shadow)}.topic-detail-hero h1{margin:5px 0}.topic-detail-hero p{margin:0;color:var(--muted)}.topic-detail-hero .secondary-btn{margin-left:auto}.topic-theory-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;margin-top:16px;padding:0 14px;background:var(--primary);color:#fff;font-size:.78rem;font-weight:800}.math-topic-practice{scroll-margin-top:88px;margin-top:34px}.math-topic-practice>.section-heading-row{margin-bottom:-8px}.math-topic-practice>.section-heading-row div{display:grid;grid-gap:4px;gap:4px}.math-topic-practice>.section-heading-row h2{margin:0}.topic-detail-emoji{display:grid;place-items:center;flex:0 0 82px;width:82px;height:82px;border-radius:24px;font-size:2.8rem}.game-card,.topic-detail-emoji{background:#fff;box-shadow:var(--shadow)}.game-card{overflow:hidden;border:1px solid var(--line);border-radius:20px;transition:transform .2s ease}.game-card:hover{transform:translateY(-4px)}.game-thumb{display:grid;place-items:center;min-height:125px;background:linear-gradient(135deg,var(--primary-soft),var(--purple-soft));color:var(--primary-dark);font-size:1.9rem;font-weight:900}.game-body{padding:16px}.game-body h3{margin:0 0 10px}.meta-row{gap:10px;margin-bottom:14px;color:var(--muted);font-size:.8rem}.meta-row,.skill-header{display:flex;justify-content:space-between}.skill-header{gap:8px;flex-wrap:wrap}.practice-arena{margin-top:28px;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:26px;box-shadow:0 18px 45px rgba(34,68,105,.12)}.arena-topbar{display:flex;align-items:center;gap:22px;padding:15px 22px;background:#fbfdff;border-bottom:1px solid var(--line)}.arena-progress{flex:1 1;height:13px;overflow:hidden;border-radius:999px;background:#e8edf3}.arena-progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#30c88b,#ffcf4d);transition:width .35s ease}.arena-counters{display:flex;gap:14px;font-weight:800;white-space:nowrap}.arena-stage{display:flex;align-items:center;justify-content:center;gap:18px;padding:24px 24px 8px;text-align:left}.arena-stage h2{margin:7px 0 2px}.arena-stage p{margin:0;color:var(--muted)}.arena-level-picker{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:10px}.arena-level-picker button{display:flex;align-items:center;gap:6px;min-height:44px;padding:6px 11px;border:1px solid #d9caef;border-radius:8px;background:#fff;color:#5a347f;font:inherit;font-size:.74rem;font-weight:800;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease,transform .15s ease}.arena-level-picker button:hover{transform:translateY(-1px);border-color:#7b3fc1}.arena-level-picker button:focus-visible{outline:3px solid rgba(47,128,237,.3);outline-offset:2px}.arena-level-picker button strong{display:grid;place-items:center;width:23px;height:23px;border-radius:50%;background:#f0e8fb}.arena-level-picker button.active{border-color:#6f2cad;background:#6f2cad;color:#fff}.arena-level-picker button.active strong{background:#fff;color:#6f2cad}.arena-level-picker button:disabled{cursor:not-allowed;opacity:.48;transform:none}.arena-level-picker button:disabled:hover{border-color:#d9caef;transform:none}.arena-mascot{display:grid;place-items:center;width:76px;height:76px;border-radius:24px;background:linear-gradient(135deg,#eaf3ff,#fff3d6);font-size:2.7rem;animation:happy-bob 2.8s ease-in-out infinite}@keyframes happy-bob{0%,to{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-7px) rotate(3deg)}}.arena-question{display:grid;place-items:center;min-height:120px;margin:18px 24px;padding:20px;border-radius:22px;background:linear-gradient(135deg,#f5f9ff,#fffaf0);border:2px dashed #cbdff4;text-align:center;font-size:clamp(1.7rem,4vw,3rem);font-weight:900}.arena-question.has-question-visual{gap:18px}.counting-dot-grid{display:grid;grid-template-columns:repeat(6,minmax(22px,34px));justify-content:center;grid-gap:12px;gap:12px;width:100%;max-width:300px}.counting-dot{display:block;width:100%;aspect-ratio:1;border:2px solid #165bb5;border-radius:50%;background:#2f80ed;box-shadow:inset 0 4px 5px rgba(255,255,255,.38),0 3px 0 #124c98}.counting-groups{display:grid;grid-template-columns:minmax(90px,1fr) 32px minmax(90px,1fr);align-items:center;grid-gap:10px;gap:10px;width:min(100%,420px)}.counting-group{display:grid;grid-template-columns:repeat(5,minmax(18px,28px));justify-content:center;grid-gap:8px;gap:8px;min-height:70px;padding:12px;border:2px solid #d7e4ef;border-radius:8px;background:#fff}.counting-groups .counting-group:last-child .counting-dot{border-color:#b54f48;background:#ff7068;box-shadow:inset 0 4px 5px rgba(255,255,255,.38),0 3px 0 #9f3e38}.counting-operation{color:var(--primary-dark);font-size:1.8rem}.choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px;max-width:720px;margin:0 auto;padding:0 24px}.math-builder{display:grid;grid-gap:14px;gap:14px;width:min(100%,520px);margin-top:10px;padding:16px;border:1px solid #bfd4ea;background:#fff;font-size:.9rem;font-weight:700}.math-builder svg{display:block;width:100%;max-height:260px}.math-builder svg line,.math-builder svg path{fill:none;stroke:#8fa9c0;stroke-width:1}.angle-builder svg line{stroke:#245c91;stroke-width:5;stroke-linecap:round}.angle-builder svg circle,.builder-point{fill:#e2a51b;stroke:#fff;stroke-width:3}.math-builder label{display:grid;grid-gap:7px;gap:7px;text-align:left}.math-builder input[type=range]{width:100%}.builder-fields{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.builder-fields label{display:flex;align-items:center;gap:7px}.builder-fields input[type=number]{width:72px;min-height:44px;padding:7px;border:1px solid #aac0d5;border-radius:5px;font:inherit}.builder-bars{display:flex;align-items:flex-end;justify-content:center;gap:22px;height:210px;padding:12px 20px 0;border-bottom:2px solid #56728d}.builder-bars>div{display:grid;grid-template-rows:1fr auto;align-items:flex-end;width:72px;height:100%}.builder-bars i{display:block;min-height:2px;background:#2f72b5}.builder-bars span{padding-top:6px}.builder-submit{display:flex;justify-content:center;padding:0 24px}.builder-submit button{min-width:210px}.coordinate-builder svg{max-width:320px;margin:auto;background:#f8fbff}.coordinate-builder svg path{stroke:#284f73;stroke-width:2}.coordinate-builder svg .builder-line{stroke:#d54d5f;stroke-width:4}.builder-symbols{display:flex;justify-content:center;gap:8px;min-height:58px;flex-wrap:wrap;color:#d79a13;font-size:2rem}.pictograph-builder label{grid-template-columns:1fr auto;align-items:center}.pictograph-builder label input{grid-column:1/-1}.pictograph-builder output{font-size:1.1rem}.line-chart-builder svg{max-width:420px;margin:auto;background:#f8fbff}.line-chart-builder svg .builder-gridline{stroke:#d9e5ef;stroke-width:1}.line-chart-builder svg .builder-axis{stroke:#284f73;stroke-width:2}.line-chart-builder svg .builder-chart-line{fill:none;stroke:#2f72b5;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}.line-chart-builder svg .builder-chart-point{fill:#d79a13;stroke:#fff;stroke-width:3}.line-chart-builder svg text{fill:#42566b;font-size:12px;font-weight:750}.line-plot-builder-grid{display:flex;align-items:flex-end;justify-content:center;padding:12px}.line-plot-builder-grid label{display:grid;grid-template-rows:54px 44px 24px;align-items:end;justify-items:center;min-width:76px;border-bottom:2px solid #36536d}.line-plot-builder-grid span{color:#356fc1;font-size:1.5rem;line-height:1}.line-plot-builder-grid input{width:58px;min-height:40px;border:1px solid #aac0d5;text-align:center;font:inherit}.line-plot-builder-grid b{padding-top:5px}.histogram-builder-grid{display:flex;align-items:flex-end;justify-content:center;min-height:210px;padding:14px}.histogram-builder-grid label{display:grid;grid-template-rows:120px 44px 26px;align-items:end;justify-items:center;width:min(118px,33%)}.histogram-builder-grid i{display:block;width:100%;min-height:2px;background:#356fc1;border:1px solid #fff;border-bottom:0}.frequency-table-builder input,.histogram-builder-grid input{width:62px;min-height:40px;border:1px solid #aac0d5;text-align:center;font:inherit}.histogram-builder-grid b{width:100%;padding-top:5px;border-top:2px solid #36536d}.frequency-table-builder table{width:100%;border-collapse:collapse}.frequency-table-builder td,.frequency-table-builder th{padding:9px;border:1px solid #c9d8e5;text-align:center}.frequency-table-builder thead th{background:#eef5fb}.exercise-visual{width:min(100%,520px);margin:2px auto 14px;border:1px solid #bfd4ea;background:#fff;color:#21364b}.exercise-visual svg{display:block;width:100%;max-height:280px}.chart-visual{padding:12px}.chart-visual .visual-gridline{stroke:#dce7f0;stroke-width:1}.chart-visual .visual-axis,.coordinate-static-visual path{fill:none;stroke:#36536d;stroke-width:2}.chart-visual rect{fill:#356fc1}.chart-visual rect.secondary{fill:#db7b2b}.chart-visual text{fill:#42566b;font-size:13px;font-weight:750}.chart-visual .visual-line{fill:none;stroke:#356fc1;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}.chart-visual .visual-line.secondary{stroke:#db7b2b}.chart-visual .visual-point{fill:#356fc1;stroke:#fff;stroke-width:2}.chart-visual .visual-point.secondary{fill:#db7b2b}.pictograph-visual{display:grid;grid-gap:10px;gap:10px;padding:18px}.pictograph-visual div{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;color:#d2940b;font-size:2rem}.pictograph-visual small{color:#53697d}.circle-chart-visual{display:flex;align-items:center;justify-content:center;gap:24px;padding:18px}.circle-chart-disc{width:150px;aspect-ratio:1;border:3px solid #fff;border-radius:50%;box-shadow:0 0 0 1px #9eb4c7}.circle-chart-visual ul{display:grid;grid-gap:8px;gap:8px;margin:0;padding:0;list-style:none}.circle-chart-visual li{display:flex;align-items:center;gap:8px;font-size:.78rem}.circle-chart-visual li i{width:14px;height:14px}.line-plot-visual{display:flex;align-items:flex-end;justify-content:center;padding:24px}.line-plot-visual>div{display:grid;grid-template-rows:58px 8px 24px;align-items:end;min-width:55px;border-bottom:2px solid #36536d;text-align:center}.line-plot-visual span{color:#356fc1;font-size:1.5rem;line-height:1}.line-plot-visual i{height:8px;border-left:2px solid #36536d}.histogram-visual{display:flex;align-items:flex-end;justify-content:center;min-height:190px;padding:22px 22px 14px}.histogram-visual>div{display:grid;grid-template-rows:130px 28px;align-items:end;width:min(110px,30%)}.histogram-visual i{display:block;background:#356fc1;border:1px solid #fff;border-bottom:0}.histogram-visual span{padding-top:6px;border-top:2px solid #36536d;font-size:.72rem}.frequency-table-visual{border-collapse:collapse}.frequency-table-visual td,.frequency-table-visual th{padding:12px;border:1px solid #c9d8e5;text-align:center}.frequency-table-visual th{background:#eef5fb}.venn-visual{padding:8px}.venn-visual circle{fill:rgba(53,111,193,.2);stroke:#356fc1;stroke-width:3}.venn-visual circle.right{fill:rgba(219,123,43,.2);stroke:#db7b2b}.venn-visual text{fill:#21364b;font-size:18px;font-weight:800;text-anchor:middle}.venn-visual text.label{font-size:13px}.coordinate-static-visual{padding:12px}.coordinate-static-visual line{stroke:#dce7f0;stroke-width:1}.coordinate-static-visual circle{fill:#356fc1;stroke:#fff;stroke-width:2}.coordinate-static-visual .transform-arrow{stroke:#7992a8;stroke-width:3;stroke-dasharray:7 5}.coordinate-static-visual .original-point{fill:#356fc1}.coordinate-static-visual .image-point{fill:#db7b2b}.coordinate-static-visual text{fill:#21364b;font-size:13px;font-weight:800}.symmetry-visual{padding:12px}.symmetry-visual line{stroke:#7992a8;stroke-width:2;stroke-dasharray:7 5}.symmetry-visual path{fill:#356fc1;stroke:#204c82;stroke-width:3}.symmetry-visual path.mirror{fill:#db7b2b;stroke:#a95717}.solid-net-visual{display:grid;grid-template-columns:repeat(4,58px);grid-template-rows:repeat(3,58px);justify-content:center;padding:18px}.solid-net-visual i{border:2px solid #356fc1;background:#dcecff}.orthographic-visual{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px;padding:18px}.orthographic-visual>div{display:grid;grid-gap:8px;gap:8px;justify-items:center}.orthographic-visual span{display:grid;grid-template-columns:repeat(3,24px);grid-template-rows:repeat(3,24px);align-items:end}.orthographic-visual i{width:24px;height:24px;border:1px solid #356fc1;background:#dcecff}@media(max-width:600px){.circle-chart-visual{align-items:flex-start}.circle-chart-disc{width:120px}.orthographic-visual{grid-template-columns:1fr}.solid-net-visual{grid-template-columns:repeat(4,46px);grid-template-rows:repeat(3,46px)}}.math-standards-panel{margin:26px 0;border:1px solid var(--line);background:#fff}.math-standards-panel>header{padding:22px 24px;border-bottom:1px solid var(--line)}.math-standards-panel>header span{color:#416bd4;font-size:.72rem;font-weight:850}.math-standards-panel>header h2{margin:5px 0 0;font-size:1.35rem}.math-standards-panel>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.math-standards-panel article{padding:20px 24px;border-right:1px solid var(--line)}.math-standards-panel article:last-child{border-right:0}.math-standards-panel article>strong{display:block;margin-bottom:10px;font-size:.86rem}.math-standards-panel ul{display:grid;grid-gap:7px;gap:7px;margin:0;padding-left:18px}.math-standards-panel li,.math-standards-panel p{color:#5e6d82;font-size:.76rem;line-height:1.55}.alignment-status{display:inline-block;margin-bottom:7px;padding:4px 7px;border:1px solid #c2d2e8;color:#315778;font-size:.65rem;font-weight:850}.alignment-status.direct{border-color:#93c5aa;background:#edf8f1;color:#246340}.alignment-status.not-assessed{border-color:#e4c7a8;background:#fff7ec;color:#81531f}@media(max-width:800px){.math-standards-panel>div{grid-template-columns:1fr}.math-standards-panel article{border-right:0;border-bottom:1px solid var(--line)}.math-standards-panel article:last-child{border-bottom:0}}.choice-btn{min-height:62px;border:2px solid var(--line);border-radius:16px;background:#fff;color:var(--heading);font-size:1.2rem;font-weight:800;box-shadow:0 5px 0 #dce7f1;transition:transform .15s ease,border-color .15s ease}.choice-btn:not(:disabled):hover{transform:translateY(-2px);border-color:var(--primary);color:var(--primary-dark)}.choice-btn.correct{background:var(--green-soft);border-color:var(--green);color:#087553;box-shadow:0 5px 0 #bcebd7}.choice-btn.wrong{background:#fff0f0;border-color:var(--red);color:#b63838;box-shadow:0 5px 0 #f1c6c6}.choice-btn.muted{opacity:.45}.arena-feedback{min-height:96px;padding:20px 24px}.feedback-card{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 18px;border-radius:17px}.feedback-card.success{background:var(--green-soft);color:#087553}.feedback-card.retry{background:var(--orange-soft);color:#865b00}.feedback-card strong{font-size:1.05rem}.feedback-card p{margin:3px 0 0}.hint-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.hint-row p{margin:0;color:var(--muted)}.arena-stats{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);background:#f9fbfd}.arena-stats span{padding:14px;text-align:center;color:var(--muted);font-size:.8rem;border-right:1px solid var(--line)}.arena-stats span:last-child{border-right:0}.arena-stats strong{display:block;color:var(--heading);font-size:1.25rem}@media(max-width:1100px){.topic-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:720px){.topic-grid{grid-template-columns:1fr}.topics-hero{align-items:flex-start;flex-direction:column;padding:22px}.topics-hero-icons span{width:54px;height:54px}.topic-detail-hero{align-items:flex-start;flex-wrap:wrap;padding:20px}.topic-detail-hero .secondary-btn{margin-left:0}.arena-topbar{align-items:stretch;flex-direction:column;gap:12px}.arena-counters{justify-content:space-between}.arena-stage{justify-content:flex-start;padding:20px 16px 4px}.arena-mascot{width:62px;height:62px;font-size:2.2rem}.arena-question{margin:16px;min-height:100px}.choice-grid{padding:0 16px}.arena-feedback{padding:16px}.feedback-card{align-items:stretch;flex-direction:column}.hero-trust{gap:8px;flex-direction:column}}@media(max-width:430px){.topic-card{min-height:0;padding:16px}.choice-grid{grid-template-columns:1fr}.choice-btn{min-height:54px}.arena-counters{font-size:.8rem}.arena-stats strong{font-size:1.05rem}.arena-stage{align-items:flex-start}.arena-level-picker{gap:5px}.arena-level-picker button{min-height:44px;padding:7px 8px}.arena-level-picker button strong{width:23px;height:23px}.arena-level-picker button span{line-height:1.35}.arena-question.has-question-visual{gap:14px;font-size:1.55rem}.counting-dot-grid{grid-template-columns:repeat(6,minmax(20px,30px));gap:9px}.counting-groups{grid-template-columns:minmax(78px,1fr) 24px minmax(78px,1fr);gap:6px}.counting-group{grid-template-columns:repeat(3,minmax(16px,24px));gap:6px;min-height:64px;padding:8px}.counting-operation{font-size:1.4rem}}.skill-learning-guide{margin:28px 0;border:1px solid #cfdeec;border-radius:8px;background:#fff;box-shadow:0 8px 22px rgba(34,68,105,.07);overflow:hidden}.skill-learning-guide>header{display:flex;align-items:center;gap:12px;padding:20px 22px;border-bottom:1px solid #dbe6ef;background:#f4f8fc}.skill-learning-guide>header>svg{width:26px;height:26px;color:#1f5fc5}.skill-learning-guide>header span{color:#536a82;font-size:.72rem;font-weight:800}.skill-learning-guide>header h2{margin:3px 0 0;font-size:1.3rem}.skill-guide-intro{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(250px,.65fr);grid-gap:0;gap:0;border-bottom:1px solid #dbe6ef}.skill-guide-intro>aside,.skill-guide-intro>div{padding:22px}.skill-guide-intro h3,.skill-guide-method h3{margin:0 0 8px;font-size:.94rem}.skill-guide-intro p,.skill-guide-notes p{margin:0;color:#536476;line-height:1.72}.skill-guide-intro>aside{display:grid;grid-template-columns:24px 1fr;grid-gap:10px;gap:10px;border-left:1px solid #dbe6ef;background:#eff9f4}.skill-guide-intro>aside svg{color:#087553}.skill-guide-intro>aside strong{display:block;margin-bottom:4px;color:#176748;font-size:.82rem}.skill-guide-method{padding:22px;border-bottom:1px solid #dbe6ef}.skill-guide-method ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px;margin:14px 0 0;padding:0;list-style:none}.skill-guide-method li{display:grid;grid-template-columns:34px 1fr;align-items:start;grid-gap:10px;gap:10px;min-height:84px;padding:14px;border:1px solid #dbe6ef;border-radius:8px;background:#fbfdff;color:#405468;line-height:1.55}.skill-guide-method li b{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#eaf3ff;color:#1f5fc5}.skill-guide-notes{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid #dbe6ef}.skill-guide-notes article{display:grid;grid-template-columns:24px 1fr;grid-gap:10px;gap:10px;padding:20px 22px;background:#fff9e7}.skill-guide-notes article+article{border-left:1px solid #eadfbf}.skill-guide-notes article>svg{color:#9a6800}.skill-guide-notes article strong{display:block;margin-bottom:4px;color:#6f5207}.skill-guide-notes article.warning{background:#fff3f1}.skill-guide-notes article.warning>svg{color:#b3403b}.skill-guide-notes article.warning strong{color:#963d38}.skill-guide-links{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 22px}.skill-guide-links>div{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.skill-guide-links a{display:inline-flex;align-items:center;gap:7px;min-height:40px;padding:7px 10px;border:1px solid #cdddea;border-radius:8px;background:#fff;color:#225f9f;font-size:.76rem;font-weight:800}.skill-guide-links a:hover{border-color:#75a9de;background:#f0f6fd}.skill-guide-links a svg{width:16px}.skill-guide-links a span{display:grid}.skill-guide-links a small{color:#6a7f94;font-size:.58rem}.skill-guide-links>div:last-child a{max-width:230px;line-height:1.3}@media(max-width:760px){.skill-guide-intro{grid-template-columns:1fr}.skill-guide-intro>aside{border-top:1px solid #dbe6ef;border-left:0}.skill-guide-method ol{grid-template-columns:1fr}.skill-guide-method li{min-height:0}.skill-guide-notes{grid-template-columns:1fr}.skill-guide-notes article+article{border-top:1px solid #eadfbf;border-left:0}.skill-guide-links{align-items:stretch;flex-direction:column}.skill-guide-links>div:last-child{display:grid;grid-template-columns:1fr}.skill-guide-links>div:last-child a{max-width:none}}.skill-guide-flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-bottom:1px solid #dbe6ef;background:#fbfdff}.skill-guide-flow span{display:flex;align-items:center;gap:8px;min-height:52px;padding:10px 12px;color:#405468;font-size:.72rem;font-weight:800}.skill-guide-flow span+span{border-left:1px solid #dbe6ef}.skill-guide-flow b{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#eaf3ff;color:#1f5fc5}.skill-guide-practice-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 22px;border-bottom:1px solid #dbe6ef;background:#eff9f4}.skill-guide-practice-cta strong{display:block;color:#176748}.skill-guide-practice-cta p{margin:4px 0 0;color:#536476;font-size:.76rem}.skill-guide-practice-cta .primary-btn{display:inline-flex;align-items:center;gap:8px;flex:0 0 auto}.skill-guide-practice-cta svg{width:17px}@media(max-width:760px){.skill-guide-flow{grid-template-columns:1fr}.skill-guide-flow span+span{border-top:1px solid #dbe6ef;border-left:0}.skill-guide-practice-cta{align-items:stretch;flex-direction:column}.skill-guide-practice-cta .primary-btn{justify-content:center}}.skills-catalog-hero{display:grid;grid-template-columns:1.25fr .75fr;grid-gap:24px;gap:24px;padding:30px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(135deg,#fff,#eef6ff 52%,#f6efff);box-shadow:var(--shadow)}.skills-catalog-hero h1{font-size:clamp(2rem,4vw,3.2rem);margin:7px 0}.skills-catalog-hero p{max-width:720px;color:var(--muted);line-height:1.7}.skills-catalog-stats{display:grid;grid-template-columns:repeat(3,1fr);align-self:center;grid-gap:10px;gap:10px}.skills-catalog-stats span{padding:15px 10px;border-radius:16px;background:#fff;text-align:center;color:var(--muted);font-size:.72rem;box-shadow:var(--shadow)}.skills-catalog-stats strong{display:block;color:var(--primary-dark);font-size:1.45rem}.skill-catalog-search{margin:20px 0}.skill-catalog-search label{display:flex;align-items:center;gap:10px;max-width:680px;min-height:54px;padding:0 16px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}.skill-catalog-search input{width:100%;border:0;outline:0;background:transparent}.skill-category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:16px;gap:16px;margin-top:18px}.skill-category-card{--topic:#2f80ed;--topic-soft:#eaf3ff;display:flex;gap:18px;padding:22px;border:1px solid color-mix(in srgb,var(--topic) 25%,white);border-radius:20px;background:linear-gradient(135deg,#fff 35%,var(--topic-soft));box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}.skill-category-card:hover{transform:translateY(-4px);box-shadow:0 16px 30px rgba(34,68,105,.14)}.skill-category-card h2{margin:0 0 6px;font-size:1.15rem}.skill-category-card p{margin:0 0 12px;color:var(--muted);line-height:1.55;font-size:.84rem}.skill-category-icon{display:grid;place-items:center;flex:0 0 58px;width:58px;height:58px;border-radius:17px;background:#fff;font-size:1.8rem;box-shadow:0 7px 18px rgba(32,56,85,.1)}.skill-category-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:11px}.category-summary span,.skill-category-meta span{padding:4px 8px;border-radius:999px;background:#fff;color:var(--topic);font-size:.7rem;font-weight:800}.catalog-empty{padding:45px;text-align:center;background:#fff;border:1px dashed var(--line);border-radius:20px}.catalog-empty>span{font-size:2.5rem}.skill-category-hero{--topic:#2f80ed;--topic-soft:#eaf3ff;display:flex;align-items:center;gap:22px;padding:28px;border:1px solid color-mix(in srgb,var(--topic) 25%,white);border-radius:24px;background:linear-gradient(135deg,#fff,var(--topic-soft));box-shadow:var(--shadow)}.skill-category-hero h1{margin:4px 0;font-size:clamp(2rem,4vw,3rem)}.skill-category-hero p{margin:0;color:var(--muted);line-height:1.6}.skill-category-hero-icon{display:grid;place-items:center;flex:0 0 84px;width:84px;height:84px;border-radius:24px;background:#fff;font-size:2.7rem;box-shadow:var(--shadow)}.category-summary{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.grade-jump-nav{position:-webkit-sticky;position:sticky;top:68px;z-index:15;display:flex;align-items:center;gap:8px;overflow:auto;margin:20px 0;padding:12px 14px;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.96);box-shadow:var(--shadow);white-space:nowrap}.grade-jump-nav strong{font-size:.78rem}.grade-jump-nav a{padding:7px 10px;border-radius:9px;background:var(--primary-soft);color:var(--primary-dark);font-size:.75rem;font-weight:800}.grade-skill-sections{display:grid;grid-gap:20px;gap:20px}.grade-skill-section{scroll-margin-top:140px;overflow:hidden;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}.grade-skill-header{display:flex;align-items:center;gap:14px;padding:17px 20px;background:linear-gradient(135deg,#f5f9ff,#fff)}.grade-skill-header h2{margin:1px 0}.grade-skill-header>div:nth-child(2)>span{color:var(--muted);font-size:.72rem}.grade-orb{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;background:var(--primary);color:#fff;font-size:1.25rem;font-weight:900}.grade-exercise-count{margin-left:auto;color:var(--muted);font-size:.78rem;font-weight:700}.grade-exercise-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line)}.grade-exercise-row{display:flex;align-items:center;gap:12px;min-height:78px;padding:13px 16px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .15s ease}.grade-exercise-row:nth-child(2n){border-right:0}.grade-exercise-row:hover{background:var(--primary-soft)}.exercise-code{flex:0 0 43px;color:var(--primary-dark);font-weight:900}.exercise-copy{min-width:0;flex:1 1}.exercise-copy h3{margin:0 0 5px;font-size:.9rem}.exercise-copy>div{display:flex;gap:6px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:.65rem}.difficulty-dot{width:7px;height:7px;border-radius:50%;background:var(--green)}.difficulty-2{background:var(--orange)}.difficulty-3{background:var(--red)}.exercise-play{display:flex;align-items:center;gap:7px;color:var(--primary-dark);font-size:.72rem;font-weight:800;white-space:nowrap}.exercise-play b{display:grid;place-items:center;width:27px;height:27px;border-radius:9px;background:var(--primary);color:#fff;font-size:.65rem}.session-complete{display:flex;align-items:center;gap:18px;margin:20px;padding:20px;border-radius:19px;background:linear-gradient(135deg,#fff4d4,#eafaf3);border:1px solid #f1db9f}.session-complete>span{font-size:3rem}.session-complete h2{margin:2px 0}.session-complete p{margin:0;color:var(--muted)}.session-complete .primary-btn{margin-left:auto}@media(max-width:900px){.grade-exercise-list,.skills-catalog-hero{grid-template-columns:1fr}.grade-exercise-row,.grade-exercise-row:nth-child(2n){border-right:0}}@media(max-width:720px){.skill-category-grid{grid-template-columns:1fr}.skills-catalog-stats{grid-template-columns:repeat(3,1fr)}.skill-category-hero{align-items:flex-start;flex-direction:column}.grade-jump-nav{top:60px}.session-complete{align-items:stretch;flex-direction:column}.session-complete .primary-btn{margin-left:0}}@media(max-width:430px){.skills-catalog-hero{padding:20px}.skills-catalog-stats{grid-template-columns:1fr}.skill-category-card{padding:16px}.skill-category-icon{flex-basis:48px;width:48px;height:48px}.grade-skill-header{padding:14px}.grade-exercise-row{padding:11px}.exercise-play{font-size:0}.exercise-play b{font-size:.65rem}.grade-exercise-count{display:none}}:root{--bg:#f6fbff;--panel:#fff;--panel-alt:#f7fbff;--line:#d8e6ef;--heading:#17324d;--text:#294861;--muted:#61798c;--primary:#246bdb;--primary-dark:#164ba5;--primary-soft:#e9f2ff;--green:#20a978;--green-soft:#e8f9f2;--orange:#f5ad27;--orange-soft:#fff5d8;--purple:#7658cc;--purple-soft:#f1edff;--red:#ef5b5b;--coral:#ff685d;--yellow:#ffd23f;--teal:#24a6a6;--shadow:0 8px 20px rgba(40,82,112,.09);--radius:8px}body{background:#f6fbff;color:var(--heading)}.header{background:rgba(255,255,255,.97);border-bottom:3px solid var(--yellow);box-shadow:0 5px 20px rgba(30,74,104,.07)}.brand{font-size:1.02rem;color:var(--heading)}.brand-mark{border-radius:50%;background:var(--coral);box-shadow:0 3px 0 #c9453e}.nav-link{border-radius:7px}.nav-link:hover{background:#fff4d4;color:#8b6500}.action-btn,.primary-btn{border-radius:8px;background:var(--primary);box-shadow:0 4px 0 #164ba5;transition:transform .15s ease,box-shadow .15s ease}.action-btn:hover,.primary-btn:hover{transform:translateY(-2px);box-shadow:0 6px 0 #164ba5}.ghost-btn,.secondary-btn{border-radius:8px;border:2px solid var(--line);box-shadow:0 3px 0 #d5e1e9;transition:transform .15s ease}.ghost-btn:hover,.secondary-btn:hover{transform:translateY(-2px);border-color:#a9c7e8}.search-box,.search-results{border-radius:8px}.happy-hero{min-height:500px;display:flex;align-items:center;padding:50px 56px;border:0;border-radius:0;box-shadow:none;background-color:#fff;background-image:url(/images/math-hero-v2.webp);background-repeat:no-repeat;background-position:50%;background-size:cover;overflow:hidden}.happy-hero .hero-copy{width:min(57%,650px);position:relative;z-index:1}.happy-hero .hero-visual{display:none}.happy-hero .hero-copy h1{max-width:640px;font-size:clamp(2.25rem,4.2vw,4rem);line-height:1.12;color:#163b63}.happy-hero .hero-copy p{max-width:590px;color:#446177;font-size:1.02rem}.happy-hero .eyebrow{display:inline-flex;padding:7px 10px;border-radius:999px;background:#fff4c9;color:#805d00}.hero-trust span{padding:6px 9px;border-radius:999px;background:rgba(255,255,255,.88);border:1px solid #dce7ef;color:#415d72}.content-block{margin-top:46px}.section-heading-row{padding-bottom:12px;border-bottom:2px solid #e2edf4}.section-heading-row h2{font-size:1.55rem}.section-heading-row>a{color:var(--primary-dark)}.category-box,.game-card,.grade-card,.grade-skill-section,.info-card,.practice-arena,.search-panel,.skill-card,.skill-category-card,.stat-card,.topic-card,.video-card,.worksheet-card{border-radius:8px;background:#fff;box-shadow:var(--shadow)}.topic-card{min-height:176px;border-top:5px solid var(--topic);background:#fff}.game-card:hover,.skill-category-card:hover,.topic-card:hover{transform:translateY(-4px);box-shadow:0 14px 26px rgba(34,75,103,.14)}.skill-category-icon,.topic-emoji{border-radius:50%;box-shadow:none;background:var(--topic-soft)}.game-card{border-top:5px solid var(--coral)}.game-card:nth-child(3n+2){border-top-color:var(--green)}.game-card:nth-child(3n+3){border-top-color:var(--yellow)}.game-thumb{min-height:140px;background:#edf5ff}.game-card:nth-child(3n+2) .game-thumb{background:#eaf9f2}.game-card:nth-child(3n+3) .game-thumb{background:#fff4d2}.game-body h3{font-size:1rem}.meta-row{padding-top:10px;border-top:1px dashed var(--line)}.grade-card{position:relative;overflow:hidden;min-height:156px;padding:20px;border:1px solid var(--line);border-bottom:5px solid var(--primary);transition:transform .18s ease,box-shadow .18s ease}.grade-card:nth-child(4n+2){border-bottom-color:var(--coral)}.grade-card:nth-child(4n+3){border-bottom-color:var(--green)}.grade-card:nth-child(4n){border-bottom-color:var(--yellow)}.grade-card:hover{transform:translateY(-4px);box-shadow:0 14px 26px rgba(34,75,103,.14)}.grade-symbol{display:grid;place-items:center;width:52px;height:52px;margin-bottom:14px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);font-size:1.35rem;font-weight:900}.grade-card:nth-child(4n+2) .grade-symbol{background:#fff0ee;color:#b33d36}.grade-card:nth-child(4n+3) .grade-symbol{background:var(--green-soft);color:#087553}.grade-card:nth-child(4n) .grade-symbol{background:var(--orange-soft);color:#8b6200}.grade-card h3{margin:0 0 4px;font-size:.98rem}.grade-card .count{color:var(--muted);font-size:.78rem}.info-card{border-left:5px solid var(--teal)}.info-card:nth-child(2){border-left-color:var(--coral)}.info-card:nth-child(3){border-left-color:var(--yellow)}.info-icon{display:block;margin-bottom:12px}.info-card h3{margin:0 0 7px}.info-card p{color:var(--muted);line-height:1.6}.info-card a{color:var(--primary-dark);font-weight:800}.footer{background:#183b56;border-top:6px solid var(--yellow)}.grade-practice-heading{padding-top:42px}.grade-practice-heading h1{color:#163b63}.grade-practice-total{border-left-color:var(--coral)}.grade-tab{border-radius:8px;border-width:2px;box-shadow:0 3px 0 #dbe7ef}.grade-tab:nth-child(4n+2) b{color:var(--coral)}.grade-tab:nth-child(4n+3) b{color:var(--green)}.grade-tab:nth-child(4n) b{color:#a77300}.grade-tab.active{background:var(--primary);box-shadow:0 4px 0 #164ba5}.grade-tab.active b{color:#fff}.grade-skill-search{border-width:2px}.grade-catalog-skill{border-radius:8px;border-left:4px solid #b8d2f4;transition:transform .15s ease,background .15s ease}.grade-catalog-skill:nth-child(3n+2){border-left-color:#ffc0ba}.grade-catalog-skill:nth-child(3n){border-left-color:#9ee2c8}.grade-catalog-skill:hover{transform:translateX(3px)}.practice-arena{border-top:6px solid var(--yellow)}.arena-mascot{border-radius:50%;background:#eaf3ff}.arena-question{border-radius:8px;background:#f7fbff;border-color:#b8d2f4}.choice-btn,.feedback-card{border-radius:8px}.skill-category-hero,.skills-catalog-hero,.topic-detail-hero,.topics-hero{border-radius:8px;background:#fff;border-top:6px solid var(--yellow)}.skill-category-card{border-top:5px solid var(--topic);background:#fff}.grade-jump-nav{border-radius:8px}.grade-orb{border-radius:50%;background:var(--coral)}@media(max-width:900px){.happy-hero{min-height:470px;padding:38px 34px;background-position:62%}.happy-hero .hero-copy{width:62%}.happy-hero .hero-copy h1{font-size:2.45rem}.happy-hero .hero-copy p{font-size:.92rem}}@media(max-width:720px){.happy-hero{min-height:650px;align-items:flex-start;padding:28px 20px 330px;background-size:auto 360px;background-position:61% bottom}.happy-hero .hero-copy{width:100%}.happy-hero .hero-copy h1{font-size:2.25rem}.happy-hero .hero-copy>p{display:none}.hero-actions{max-width:290px;margin-top:22px}.hero-trust{display:none}.content-block{margin-top:38px}.section-heading-row{align-items:flex-start}.section-heading-row h2{font-size:1.3rem}.mobile-nav-panel{border-top:1px solid var(--line);border-bottom:4px solid var(--yellow)}}@media(max-width:430px){.happy-hero{min-height:640px;padding-bottom:320px;background-size:auto 350px;background-position:60% bottom}.happy-hero .hero-copy h1{font-size:2rem}.grade-card{min-height:138px}}.grade-catalog-skill.has-visual{grid-template-columns:54px 44px minmax(0,1fr) auto;min-height:66px}.catalog-skill-visual{width:42px;height:42px;overflow:hidden;border-radius:8px;background:#eef6ff}.catalog-skill-visual img{width:100%;height:100%;display:block;object-fit:cover}.catalog-skill-visual.visual-arithmetic img{object-position:center 67%}.catalog-skill-visual.visual-fractions img{object-position:55% center}.catalog-skill-visual.visual-geometry img{object-position:center}.catalog-skill-visual.visual-measurement img{object-position:27% center}.catalog-skill-visual.visual-graphing img{object-position:center}.arena-question-layout{margin:18px 24px}.arena-question-layout .arena-question{height:100%;margin:0}@media(max-width:720px){.grade-catalog-skill.has-visual{grid-template-columns:46px 40px minmax(0,1fr) auto}.catalog-skill-visual{width:38px;height:38px}.arena-question-layout{margin:16px;display:grid;grid-template-columns:1fr}.arena-question-layout .arena-question{min-height:105px}}.entrant-page{max-width:1240px}.entrant-course-header{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,.85fr);min-height:390px;overflow:hidden;border-top:6px solid var(--coral);border-bottom:1px solid var(--line);background:#fff}.entrant-course-copy{display:flex;flex-direction:column;justify-content:center;padding:42px}.entrant-course-copy h1{max-width:650px;margin:8px 0 14px;font-size:clamp(2.25rem,4vw,3.65rem);line-height:1.12}.entrant-course-copy p{max-width:680px;margin:0;color:var(--muted);font-size:1rem;line-height:1.75}.entrant-course-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.entrant-course-image{position:relative;min-height:390px;margin:0;background:#eef5fb}.entrant-course-image img{width:100%;height:100%;position:absolute;inset:0;display:block;object-fit:cover;object-position:center}.entrant-course-stats{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line);background:#fff}.entrant-course-stats div{padding:19px 22px;border-right:1px solid var(--line)}.entrant-course-stats div:last-child{border-right:0}.entrant-course-stats strong{display:block;color:var(--primary-dark);font-size:1.55rem}.entrant-course-stats span{color:var(--muted);font-size:.78rem;font-weight:600}.entrant-course-layout,.entrant-lesson-layout{display:grid;grid-template-columns:250px minmax(0,1fr);grid-gap:34px;gap:34px;align-items:start;margin-top:42px}.entrant-module-nav{position:-webkit-sticky;position:sticky;top:86px;max-height:calc(100vh - 110px);overflow:auto;border:1px solid var(--line);border-top:5px solid var(--yellow);border-radius:8px;background:#fff}.entrant-module-nav-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:16px;border-bottom:1px solid var(--line)}.entrant-module-nav-heading span{font-weight:800}.entrant-module-nav-heading strong{color:var(--muted);font-size:.72rem}.entrant-module-nav ol{list-style:none;margin:0;padding:6px}.entrant-module-nav li+li{border-top:1px solid #edf2f6}.entrant-module-nav a{display:flex;align-items:center;gap:10px;padding:10px;border-left:3px solid transparent}.entrant-module-nav a:hover{background:var(--primary-soft)}.entrant-module-nav a.active{border-left-color:var(--coral);background:#fff3f1}.entrant-module-nav a>span{display:grid;place-items:center;flex:0 0 30px;width:30px;height:30px;border-radius:50%;background:#eaf2f8;color:var(--primary-dark);font-size:.74rem;font-weight:900}.entrant-module-nav a.active>span{background:var(--coral);color:#fff}.entrant-module-nav a>div{display:grid;min-width:0}.entrant-module-nav a strong{font-size:.78rem;line-height:1.35}.entrant-module-nav a small{margin-top:2px;color:var(--muted);font-size:.65rem}.entrant-section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:15px;border-bottom:2px solid var(--line)}.entrant-section-heading.compact{margin-bottom:0}.entrant-section-heading h2{margin:4px 0 0;font-size:1.45rem}.entrant-section-heading p{max-width:420px;margin:0;color:var(--muted);font-size:.82rem;line-height:1.6}.entrant-module-grid{display:grid;grid-gap:0;gap:0}.entrant-module-card{display:grid;grid-template-columns:54px minmax(0,1fr) 28px;grid-gap:16px;gap:16px;align-items:start;padding:21px 8px;border-bottom:1px solid var(--line);transition:background .15s ease,padding .15s ease}.entrant-module-card:hover{padding-left:14px;background:#fff}.entrant-module-index{display:grid;place-items:center;width:45px;height:45px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);font-size:.82rem;font-weight:900}.entrant-module-card:nth-child(4n+2) .entrant-module-index{background:#fff0ee;color:#b33d36}.entrant-module-card:nth-child(4n+3) .entrant-module-index{background:var(--green-soft);color:#087553}.entrant-module-card:nth-child(4n) .entrant-module-index{background:var(--orange-soft);color:#8b6200}.entrant-module-card h3{margin:0 0 7px;font-size:1rem}.entrant-module-card p{margin:0;color:var(--muted);font-size:.82rem;line-height:1.55}.entrant-module-card>b{align-self:center;color:var(--primary-dark);font-size:1.25rem}.entrant-module-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:11px}.entrant-module-meta span{padding:4px 7px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);font-size:.66rem;font-weight:700}.entrant-coming-next{display:grid;grid-template-columns:130px minmax(0,1fr) auto;align-items:center;grid-gap:24px;gap:24px;margin-top:46px;padding:24px 0;border-top:3px solid var(--yellow);border-bottom:1px solid var(--line)}.entrant-coming-next>span{color:var(--primary-dark);font-size:.75rem;font-weight:800;text-transform:uppercase}.entrant-coming-next h2{margin:0 0 5px}.entrant-coming-next p{margin:0;color:var(--muted)}.entrant-coming-next>strong{padding:7px 10px;border-radius:6px;background:var(--orange-soft);color:#855c00;font-size:.72rem}.entrant-lesson-page{max-width:1160px}.entrant-lesson-layout{grid-template-columns:235px minmax(0,1fr);margin-top:8px}.entrant-lesson{min-width:0}.entrant-lesson-header{padding:32px 0 28px;border-bottom:1px solid var(--line)}.entrant-lesson-kicker{display:flex;gap:8px;flex-wrap:wrap}.entrant-lesson-kicker span{padding:5px 8px;border-radius:6px;background:var(--primary-soft);color:var(--primary-dark);font-size:.7rem;font-weight:800}.entrant-lesson-header h1{max-width:760px;margin:13px 0 10px;font-size:clamp(2rem,4vw,3rem);line-height:1.2}.entrant-lesson-header>p{max-width:760px;margin:0;color:var(--muted);line-height:1.75}.entrant-book-reference{margin-top:18px;padding-left:12px;border-left:3px solid var(--yellow);color:var(--muted);font-size:.76rem}.entrant-objectives{padding:26px 0;border-bottom:1px solid var(--line)}.entrant-objectives h2{margin:0 0 14px;font-size:1.1rem}.entrant-objectives ul{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px;margin:0;padding:0;list-style:none}.entrant-objectives li{position:relative;padding:12px 12px 12px 34px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:.78rem;line-height:1.5}.entrant-objectives li:before{content:"✓";position:absolute;left:12px;color:var(--green);font-weight:900}.entrant-theory{padding-top:32px}.entrant-theory-block{display:grid;grid-template-columns:42px minmax(0,1fr);grid-gap:16px;gap:16px;padding:25px 0;border-bottom:1px solid var(--line)}.entrant-theory-block>span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;font-weight:900}.entrant-theory-block h3{margin:4px 0 10px;font-size:1.08rem}.entrant-theory-block p{margin:0;color:var(--text);line-height:1.78}.entrant-theory-block ul{margin:16px 0 0;padding-left:20px;color:var(--muted);font-size:.83rem;line-height:1.75}.entrant-formula-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.entrant-formula-list code{padding:9px 11px;border:1px solid #cbdcf0;border-radius:6px;background:#f5f9ff;color:#163b63;font-family:Cambria,Times New Roman,serif;font-size:1rem;font-weight:700}.entrant-worked-example{margin:34px 0;padding:25px;border:1px solid #bfe4d6;border-left:6px solid var(--green);border-radius:8px;background:#f6fcf9}.entrant-worked-example header>span{color:#087553;font-size:.72rem;font-weight:900;text-transform:uppercase}.entrant-worked-example h2{margin:7px 0 17px;font-size:1.15rem;line-height:1.5}.entrant-worked-example ol{margin:0;padding-left:25px;counter-reset:example-step}.entrant-worked-example li{padding:6px 0;color:var(--text);line-height:1.6}.entrant-worked-example>div{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid #cbe6dc}.entrant-worked-example>div strong{padding:5px 8px;border-radius:5px;background:var(--green);color:#fff;font-size:.7rem}.entrant-worked-example>div span{font-family:Cambria,Times New Roman,serif;font-size:1.05rem;font-weight:700}.entrant-practice-section{padding-top:10px}.entrant-exercise-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px;margin-top:20px}.entrant-exercise{padding:18px;border:1px solid var(--line);border-top:4px solid var(--primary);border-radius:8px;background:#fff}.entrant-exercise:nth-child(3n+2){border-top-color:var(--coral)}.entrant-exercise:nth-child(3n){border-top-color:var(--green)}.entrant-exercise header{display:flex;align-items:center;justify-content:space-between;gap:10px}.entrant-exercise-number{color:var(--primary-dark);font-size:.76rem;font-weight:900}.entrant-difficulty{padding:4px 7px;border-radius:5px;font-size:.62rem;font-weight:800}.difficulty-საბაზისო{background:var(--green-soft);color:#087553}.difficulty-საშუალო{background:var(--orange-soft);color:#855c00}.difficulty-რთული{background:#fff0f0;color:#b63838}.entrant-exercise>p{min-height:54px;margin:14px 0;color:var(--heading);font-size:.88rem;font-weight:700;line-height:1.55}.entrant-exercise details{border-top:1px solid var(--line)}.entrant-exercise summary{padding:10px 0;color:var(--primary-dark);font-size:.74rem;font-weight:800;cursor:pointer}.entrant-exercise details>div{padding:2px 0 12px;color:var(--muted);font-size:.78rem;line-height:1.65}.entrant-exercise details strong{display:block;color:#087553}.entrant-exercise details p{margin:6px 0 0}.entrant-lesson-pagination{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}.entrant-lesson-pagination a{display:flex;flex-direction:column;padding:16px;border:1px solid var(--line);border-radius:8px;background:#fff}.entrant-lesson-pagination a:last-child{text-align:right}.entrant-lesson-pagination a:hover{border-color:#9fc6f7;background:var(--primary-soft)}.entrant-lesson-pagination span{color:var(--muted);font-size:.7rem}.entrant-lesson-pagination strong{margin-top:4px;font-size:.82rem}.entrant-coming-next>a{display:inline-flex;align-items:center;min-height:44px}.entrant-paths{margin-top:32px;padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.entrant-paths>header h2{margin:5px 0 18px}.entrant-paths>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:0;gap:0}.entrant-paths article{display:grid;align-content:start;min-width:0;padding:20px;border-right:1px solid var(--line);background:#fff}.entrant-paths article:first-child{border-left:1px solid var(--line)}.entrant-paths article>svg{color:var(--primary-dark)}.entrant-paths h3{margin:14px 0 7px;font-size:1rem}.entrant-paths p{margin:0;color:var(--muted);font-size:.8rem;line-height:1.6}.entrant-paths a{display:inline-flex;align-items:center;gap:6px;min-height:44px;margin-top:14px;color:var(--primary-dark);font-size:.78rem;font-weight:800}:where(a,button,input,select,textarea):focus-visible{outline:3px solid #d6a900;outline-offset:3px}.action-btn,.ghost-btn,.primary-btn,.secondary-btn{min-height:44px}.info-card a,.section-heading-row>a,.stem-page-header>a{display:inline-flex;align-items:center;min-height:44px}.solid-bases-visual{padding:14px 18px 12px;background:#f8fbff}.solid-bases-visual svg{height:auto}.solid-bases-visual .solid-face{fill:#e8f0f8;stroke:#36536d;stroke-width:3;stroke-linejoin:round}.solid-bases-visual .solid-edge{fill:none;stroke:#36536d;stroke-width:3;stroke-linejoin:round}.solid-bases-visual .base-face{fill:#f4ca62;fill-opacity:.88;stroke:#a66a13;stroke-width:4;stroke-linejoin:round}.solid-bases-visual .base-face.secondary{fill:#f7dc98}.solid-bases-visual .solid-vertex{fill:#36536d}.solid-bases-visual text{fill:#5f4214;font-size:14px;font-weight:900;text-anchor:middle}.solid-bases-visual p{display:flex;align-items:center;justify-content:center;gap:8px;margin:2px 0 0;color:#42566b;font-size:.72rem;font-weight:800;text-align:center}.solid-bases-visual p span{width:15px;height:15px;border:3px solid #a66a13;background:#f4ca62}.time-scale-visual{display:grid;grid-gap:14px;gap:14px;padding:20px 24px;background:#f8fbff}.time-scale-event{display:flex;align-items:center;justify-content:center;gap:10px;color:#21364b;text-align:center}.time-scale-event svg{flex:0 0 auto;width:30px;height:30px;color:#356fc1}.time-scale-event strong{font-size:.84rem;line-height:1.5}.time-scale-track{position:relative;height:38px;margin:0 10px}.time-scale-line{position:absolute;top:17px;right:0;left:0;height:4px;background:#b8c9d8}.time-scale-tick{top:11px;width:2px;height:16px;background:#7890a4}.time-scale-marker,.time-scale-tick{position:absolute;transform:translateX(-50%)}.time-scale-marker{top:5px;width:26px;height:26px;border:5px solid #fff;border-radius:50%;background:#db7b2b;box-shadow:0 0 0 2px #a95717}.time-scale-labels{display:flex;justify-content:space-between;color:#53697d;font-size:.65rem;font-weight:850}@media(max-width:600px){.solid-bases-visual{padding:10px}.solid-bases-visual svg{max-height:210px}.time-scale-visual{padding:18px 14px}.time-scale-event{align-items:flex-start}.time-scale-event strong{font-size:.75rem}.time-scale-track{margin:0 4px}}.skill-quarantine{display:grid;grid-template-columns:52px minmax(0,1fr);grid-gap:18px;gap:18px;align-items:start;margin:24px 0;padding:26px;border:1px solid #d7bf70;border-left:6px solid #b78612;background:#fffaf0;color:#3e3521}.skill-quarantine-mark{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#f2d36d;color:#4d3a00;font-size:1.45rem;font-weight:950}.skill-quarantine h2{margin:5px 0 8px;font-size:1.35rem}.skill-quarantine p{max-width:760px;margin:0 0 18px;color:#655c46;line-height:1.7}@media(max-width:620px){.skill-quarantine{grid-template-columns:1fr;padding:20px 16px}.skill-quarantine-mark{width:44px;height:44px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}@media(max-width:1000px){.entrant-course-header{grid-template-columns:1.1fr .9fr}.entrant-course-copy{padding:32px}.entrant-course-layout,.entrant-lesson-layout{grid-template-columns:210px minmax(0,1fr);gap:24px}.entrant-exercise-list,.entrant-objectives ul{grid-template-columns:1fr}}@media(max-width:780px){.entrant-course-header{grid-template-columns:1fr}.entrant-course-image{min-height:250px;order:-1}.entrant-course-copy{padding:25px}.entrant-course-copy h1{font-size:2.35rem}.entrant-course-stats{grid-template-columns:repeat(2,1fr)}.entrant-course-stats div:nth-child(2){border-right:0}.entrant-course-stats div:nth-child(-n+2){border-bottom:1px solid var(--line)}.entrant-paths>div{grid-template-columns:1fr}.entrant-paths article{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.entrant-paths article:last-child{border-bottom:0}.entrant-course-layout,.entrant-lesson-layout{grid-template-columns:1fr}.entrant-module-nav{position:static;max-height:none}.entrant-lesson-layout>.entrant-module-nav{max-height:290px}.entrant-section-heading{align-items:flex-start;flex-direction:column;gap:8px}.entrant-coming-next{grid-template-columns:1fr;gap:8px}.entrant-coming-next>strong{justify-self:start}.entrant-lesson-header{padding-top:20px}.entrant-theory-block{grid-template-columns:34px minmax(0,1fr);gap:11px}.entrant-theory-block>span{width:32px;height:32px}.entrant-worked-example{padding:20px}.entrant-lesson-pagination{grid-template-columns:1fr}.entrant-lesson-pagination a:last-child{text-align:left}}@media(max-width:430px){.entrant-course-image{min-height:210px}.entrant-course-copy h1{font-size:2rem}.entrant-course-stats div{padding:15px}.entrant-module-card{grid-template-columns:42px minmax(0,1fr) 20px;gap:10px}.entrant-module-index{width:38px;height:38px}.entrant-module-meta span:nth-child(3){display:none}.entrant-exercise>p{min-height:0}.entrant-formula-list code{max-width:100%;overflow-wrap:anywhere}.entrant-lesson-pagination{gap:8px}}.entrant-digital-book{display:grid;grid-template-columns:70px minmax(0,1fr) auto;align-items:center;grid-gap:22px;gap:22px;margin-top:30px;padding:24px 0;border-top:4px solid var(--green);border-bottom:1px solid var(--line)}.entrant-digital-book-mark{display:grid;place-items:center;width:64px;height:64px;border-radius:50%;background:var(--green-soft);color:#087553;font-family:Cambria,Times New Roman,serif;font-size:2rem;font-weight:900}.entrant-digital-book h2{margin:4px 0 7px;font-size:1.3rem}.entrant-digital-book p{max-width:760px;margin:0;color:var(--muted);font-size:.85rem;line-height:1.65}.entrant-digital-book .primary-btn{white-space:nowrap}.algebra-book-page{max-width:1500px}.algebra-book-header{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;padding:24px 0 27px;border-bottom:1px solid var(--line)}.algebra-book-header h1{margin:6px 0 10px;font-size:clamp(2rem,4vw,3.2rem)}.algebra-book-header p{max-width:800px;margin:0;color:var(--muted);line-height:1.7}.algebra-book-header dl{display:grid;grid-template-columns:repeat(4,94px);margin:0}.algebra-book-header dl div{padding:12px;border-left:1px solid var(--line)}.algebra-book-header dt{color:var(--primary-dark);font-size:1.35rem;font-weight:900}.algebra-book-header dd{margin:2px 0 0;color:var(--muted);font-size:.65rem;line-height:1.35}.algebra-book-app{margin-top:24px;border:1px solid var(--line);border-top:5px solid var(--yellow);border-radius:8px;background:#fff;box-shadow:var(--shadow)}.book-reader-toolbar{position:-webkit-sticky;position:sticky;top:61px;z-index:18;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:10px 12px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.97)}.book-mode-tabs{display:flex;gap:5px}.book-mode-tabs button{display:flex;align-items:center;gap:7px;min-height:40px;padding:0 12px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--heading);font-size:.76rem;font-weight:800}.book-mode-tabs button span{display:grid;place-items:center;min-width:24px;height:20px;padding:0 5px;border-radius:5px;background:#edf3f7;color:var(--muted);font-size:.62rem}.book-mode-tabs button.active{border-color:var(--primary);background:var(--primary);color:#fff}.book-mode-tabs button.active span{background:rgba(255,255,255,.2);color:#fff}.book-page-controls{display:flex;align-items:center;gap:8px}.book-page-controls>button,.book-zoom-controls button{width:38px;height:38px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--primary-dark);font-weight:900}.book-bottom-navigation button:disabled,.book-page-controls>button:disabled{opacity:.35;cursor:not-allowed}.book-page-controls label{display:flex;align-items:center;gap:7px;height:38px;padding:0 8px;border:1px solid var(--line);border-radius:7px;background:#fff}.book-page-controls label span,.book-page-controls>span{color:var(--muted);font-size:.68rem;font-weight:700;white-space:nowrap}.book-page-controls select{border:0;outline:0;background:transparent;color:var(--heading);font-weight:800}.algebra-book-layout{display:grid;grid-template-columns:225px minmax(440px,1fr) 360px;align-items:start}.book-section-list{position:-webkit-sticky;position:sticky;top:123px;max-height:calc(100vh - 145px);overflow:auto;border-right:1px solid var(--line);background:#fbfdff}.book-section-list>div{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:14px;border-bottom:1px solid var(--line)}.book-section-list>div strong{font-size:.8rem}.book-section-list>div span{color:var(--muted);font-size:.65rem}.book-section-list ol{margin:0;padding:5px;list-style:none}.book-section-list li+li{border-top:1px solid #edf2f6}.book-section-list button{display:grid;grid-template-columns:30px minmax(0,1fr);grid-gap:9px;gap:9px;width:100%;padding:9px 8px;border:0;border-left:3px solid transparent;background:transparent;text-align:left}.book-section-list button:hover{background:var(--primary-soft)}.book-section-list button.active{border-left-color:var(--coral);background:#fff1ef}.book-section-list button>span{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eaf2f8;color:var(--primary-dark);font-size:.67rem;font-weight:900}.book-section-list button.active>span{background:var(--coral);color:#fff}.book-section-list button div{display:grid;min-width:0}.book-section-list button strong{font-size:.7rem;line-height:1.35}.book-section-list button small{margin-top:3px;color:var(--muted);font-size:.6rem}.book-page-workspace{min-width:0;padding:16px;background:#eef3f7}.book-page-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px}.book-page-heading>div:first-child span{color:var(--primary-dark);font-size:.68rem;font-weight:900}.book-page-heading h2{margin:3px 0 0;font-size:1rem}.book-zoom-controls{display:flex;align-items:center;gap:5px}.book-zoom-controls span{min-width:48px;color:var(--muted);font-size:.65rem;text-align:center}.book-zoom-controls button:last-child{width:auto;padding:0 9px;font-size:.65rem}.book-page-image-wrap{max-height:calc(100vh - 230px);min-height:600px;overflow:auto;margin:0;border:1px solid #cbd9e3;border-radius:8px;background:#d9e2e9}.book-page-image-wrap img{display:block;max-width:none;margin:0 auto;background:#fff;box-shadow:0 8px 25px rgba(26,54,79,.16)}.book-bottom-navigation{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;grid-gap:10px;gap:10px;margin-top:12px}.book-bottom-navigation>button{min-height:40px;padding:0 12px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--primary-dark);font-size:.72rem;font-weight:800}.book-bottom-navigation>button:last-child{justify-self:stretch}.book-completed-toggle{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:.68rem;font-weight:700;white-space:nowrap}.book-completed-toggle input{width:17px;height:17px;accent-color:var(--green)}.book-answer-panel{position:-webkit-sticky;position:sticky;top:123px;max-height:calc(100vh - 145px);overflow:auto;padding:16px;border-left:1px solid var(--line);background:#fff}.book-answer-panel>header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:15px}.book-answer-panel>header span{font-size:.9rem;font-weight:900}.book-answer-panel>header strong{padding:4px 7px;border-radius:5px;background:var(--green-soft);color:#087553;font-size:.62rem}.book-answer-display,.book-exercise-input{display:grid;grid-gap:5px;gap:5px;margin-bottom:10px}.book-answer-display span,.book-exercise-input span{color:var(--muted);font-size:.65rem;font-weight:800}.book-exercise-input input{height:40px;padding:0 11px;border:1px solid var(--line);border-radius:7px;outline:0}.book-answer-display{position:relative}.book-answer-display input{height:78px;padding:0 14px;border:2px solid #b8cbe0;border-radius:8px;outline:0;background:#fff;font-family:Cambria,Times New Roman,serif;font-size:1.45rem;text-align:right}.book-answer-display input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(36,107,219,.12)}.math-keyboard{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));grid-gap:5px;gap:5px}.math-keyboard button{height:39px;min-width:0;padding:0 2px;border:0;border-radius:7px;background:#e7efff;color:#174a9b;font-family:Cambria,Times New Roman,serif;font-size:.72rem;font-weight:700}.math-keyboard button.number-key{background:#f0f3f6;color:var(--heading)}.math-keyboard button:hover{filter:brightness(.96);transform:translateY(-1px)}.book-save-answer{width:100%;min-height:44px;margin-top:10px;border:0;border-radius:7px;background:var(--primary);color:#fff;font-weight:900;box-shadow:0 4px 0 #164ba5}.book-answer-status{min-height:20px;margin:9px 0;color:var(--green);font-size:.67rem;font-weight:700}.book-saved-answers{padding-top:12px;border-top:1px solid var(--line)}.book-saved-answers>div{display:flex;align-items:center;justify-content:space-between}.book-saved-answers h3{margin:0;font-size:.8rem}.book-saved-answers>div>span{display:grid;place-items:center;width:23px;height:23px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);font-size:.62rem;font-weight:900}.book-saved-answers>p{color:var(--muted);font-size:.68rem}.book-saved-answers ul{display:grid;grid-gap:5px;gap:5px;margin:10px 0 0;padding:0;list-style:none}.book-saved-answers li{display:grid;grid-template-columns:minmax(0,1fr) 30px;grid-gap:4px;gap:4px}.book-saved-answers li>button:first-child{display:grid;grid-template-columns:50px minmax(0,1fr);align-items:center;grid-gap:8px;gap:8px;min-height:38px;padding:6px 8px;border:1px solid var(--line);border-radius:7px;background:#fff;text-align:left}.book-saved-answers li>button:first-child strong{color:var(--primary-dark);font-size:.67rem}.book-saved-answers li>button:first-child span{overflow:hidden;font-family:Cambria,Times New Roman,serif;font-size:.78rem;text-overflow:ellipsis;white-space:nowrap}.book-saved-answers li>button:last-child{border:0;border-radius:7px;background:#fff0f0;color:#b63838;font-weight:900}@media(max-width:1250px){.algebra-book-header{align-items:flex-start;flex-direction:column}.algebra-book-layout{grid-template-columns:210px minmax(0,1fr)}.book-answer-panel{position:static;grid-column:1/-1;max-height:none;border-top:1px solid var(--line);border-left:0;display:grid;grid-template-columns:260px minmax(360px,1fr);grid-gap:0 18px;gap:0 18px}.book-answer-display,.book-answer-panel>header,.book-answer-status,.book-exercise-input,.book-save-answer{grid-column:1}.math-keyboard{grid-column:2;grid-row:1/7}.book-saved-answers{grid-column:1/-1}.book-page-image-wrap{max-height:800px}}@media(max-width:820px){.entrant-digital-book{grid-template-columns:55px minmax(0,1fr)}.entrant-digital-book-mark{width:52px;height:52px}.entrant-digital-book .primary-btn{grid-column:1/-1;justify-self:start}.algebra-book-header dl{grid-template-columns:repeat(2,110px)}.book-reader-toolbar{top:59px;align-items:stretch;flex-direction:column}.book-mode-tabs{display:grid;grid-template-columns:repeat(3,1fr)}.book-mode-tabs button{justify-content:center;padding:0 7px}.book-page-controls{justify-content:space-between}.algebra-book-layout{grid-template-columns:1fr}.book-section-list{position:static;max-height:280px;border-right:0;border-bottom:1px solid var(--line)}.book-page-workspace{padding:10px}.book-page-image-wrap{min-height:450px;max-height:70vh}.book-answer-panel{display:block}.math-keyboard{margin-top:8px}.book-bottom-navigation{grid-template-columns:1fr 1fr}.book-completed-toggle{grid-column:1/-1;grid-row:2;justify-self:center}.book-page-heading{align-items:flex-start;flex-direction:column}.book-zoom-controls{align-self:stretch;justify-content:flex-end}}@media(max-width:480px){.algebra-book-header h1{font-size:2rem}.algebra-book-header dl{width:100%;grid-template-columns:repeat(2,1fr)}.book-reader-toolbar{position:static}.book-mode-tabs button{align-items:flex-start;flex-direction:column;justify-content:center;gap:1px;font-size:.67rem}.book-page-controls label span{display:none}.book-page-controls>span{font-size:.62rem}.book-page-image-wrap{min-height:390px}.math-keyboard{gap:4px}.math-keyboard button{height:38px;font-size:.68rem}.book-answer-display input{height:68px}.book-bottom-navigation>button{padding:0 6px;font-size:.66rem}}.book-answer-display input,.book-exercise-input input{width:100%;min-width:0}.book-answer-display{min-width:0}.book-page-crop{position:relative;overflow:hidden;margin:0 auto;background:#fff;box-shadow:0 8px 25px rgba(26,54,79,.16)}.book-page-crop img{position:absolute;left:0;width:100%;height:auto;margin:0;box-shadow:none}.book-answer-list{display:grid;grid-gap:6px;gap:6px;margin:0;padding:0;list-style:none}.book-answer-list li{display:grid;grid-template-columns:minmax(0,1fr) 66px;align-items:center;grid-gap:6px;gap:6px;padding:5px;border:1px solid var(--line);border-radius:7px;background:#fff}.book-answer-list li.active{border-color:var(--primary);box-shadow:0 0 0 2px rgba(36,107,219,.1)}.book-answer-list li.saved{border-color:#a8ddcc;background:#f5fcf9}.book-answer-list label{display:grid;grid-template-columns:58px minmax(0,1fr);align-items:center;grid-gap:6px;gap:6px;min-width:0}.book-answer-list label>span{display:grid;place-items:center;min-height:36px;border-radius:6px;background:#edf3f7;color:var(--primary-dark);font-size:.68rem;font-weight:900}.book-answer-list li.saved label>span{background:var(--green-soft);color:#087553}.book-answer-list input{width:100%;min-width:0;height:36px;padding:0 9px;border:1px solid #cad7e1;border-radius:6px;outline:0;background:#fff;font-family:Cambria,Times New Roman,serif;font-size:.9rem}.book-answer-list input:focus{border-color:var(--primary)}.book-answer-row-actions{display:grid;grid-template-columns:repeat(2,30px);grid-gap:4px;gap:4px}.book-answer-row-actions button{width:30px;height:32px;padding:0;border:0;border-radius:6px;background:var(--primary);color:#fff;font-weight:900}.book-answer-row-actions button.saved{background:var(--green)}.book-answer-row-actions button:last-child{background:#fff0f0;color:#b63838}.book-answer-row-actions button:disabled{opacity:.28;cursor:not-allowed}.book-keyboard-toggle{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:12px;padding-top:11px;border-top:1px solid var(--line)}.book-keyboard-toggle>button{display:flex;align-items:center;gap:7px;min-height:38px;padding:0 10px;border:1px solid #bfd0df;border-radius:7px;background:#f7fafc;color:var(--primary-dark);font-size:.68rem;font-weight:900}.book-keyboard-toggle>button span{font-size:1rem}.book-keyboard-toggle small{color:var(--muted);font-size:.62rem;font-weight:800}.book-collapsible-keyboard{margin-top:10px}.book-answer-empty{padding:18px 12px;border:1px dashed #bfd0df;border-radius:7px;background:#f8fbfd;color:var(--muted);font-size:.72rem;line-height:1.6;text-align:center}@media(max-width:1250px){.book-answer-panel{display:block}.book-answer-list{grid-template-columns:repeat(2,minmax(0,1fr))}.book-answer-panel .math-keyboard{grid-column:auto;grid-row:auto}}@media(max-width:700px){.book-answer-list{grid-template-columns:1fr}}@media(max-width:480px){body,html{max-width:100%;overflow-x:hidden}.algebra-book-app,.algebra-book-header,.algebra-book-header>div,.algebra-book-layout,.algebra-book-page,.book-answer-panel,.book-page-workspace,.book-section-list{width:100%;min-width:0;max-width:100%}.algebra-book-page{padding-right:12px;padding-left:12px;overflow:hidden}.algebra-book-header h1,.algebra-book-header p,.book-page-heading h2,.book-section-list button strong{overflow-wrap:anywhere}.book-mode-tabs{width:100%;grid-template-columns:repeat(3,minmax(0,1fr))}.book-mode-tabs button{width:100%;min-width:0;white-space:normal;overflow:hidden;line-height:1.25}.book-mode-tabs button span{min-width:20px}.book-page-controls{display:grid;grid-template-columns:38px minmax(0,1fr) auto 38px;width:100%}.book-page-controls label,.book-page-controls select{width:100%;min-width:0}.book-answer-list label{grid-template-columns:52px minmax(0,1fr)}}.arcade-game{--arcade-blue:#1769d2;--arcade-yellow:#ffd44d;--arcade-coral:#ef6257;--arcade-green:#1fa879;--arcade-ink:#172a3b;overflow:hidden;margin-top:28px;border:1px solid #cbd9e5;border-top:6px solid var(--arcade-yellow);border-radius:8px;background:#fff;box-shadow:0 16px 38px rgba(30,60,88,.13)}.arcade-scorebar{justify-content:space-between;gap:16px;min-height:62px;padding:10px 16px;background:var(--arcade-ink);color:#fff}.arcade-game-name,.arcade-score-items,.arcade-score-items span,.arcade-scorebar{display:flex;align-items:center}.arcade-game-name{gap:9px;min-width:0}.arcade-game-name strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.arcade-score-items{gap:8px}.arcade-score-items span{gap:5px;min-width:58px;justify-content:center;font-weight:800}.arcade-score-items span:first-child{color:var(--arcade-yellow)}.arcade-score-items span:nth-child(2){color:#78dbff}.arcade-score-items span:nth-child(3){color:#ff8b83}.arcade-score-items button{display:grid;place-items:center;width:38px;height:38px;border:1px solid rgba(255,255,255,.25);border-radius:6px;background:transparent;color:#fff}.arcade-score-items button:hover{background:rgba(255,255,255,.12)}.arcade-progress{height:8px;background:#dce7ef}.arcade-progress span{display:block;height:100%;background:var(--arcade-green);transition:width .45s ease}.arcade-stage{position:relative;min-height:520px;padding:24px;background:#eef4f8}.arcade-question{text-align:center}.arcade-question>span{color:#607489;font-size:.72rem;font-weight:800}.arcade-question h2{min-height:48px;margin:7px auto 20px;font-size:clamp(1.65rem,4vw,2.55rem);line-height:1.25;overflow-wrap:anywhere}.arcade-answers{display:grid;grid-gap:12px;gap:12px}.arcade-answers button{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;min-width:0;border:2px solid #b8cad9;border-radius:8px;background:#fff;color:var(--arcade-ink);font-size:1.35rem;transition:transform .15s ease,border-color .15s ease,background .15s ease}.arcade-answers button:not(:disabled):hover{z-index:2;transform:translateY(-3px);border-color:var(--arcade-blue)}.arcade-answers button:disabled{cursor:default}.arcade-feedback{display:grid;place-items:center;min-height:36px;margin-top:14px;font-weight:900;text-align:center}.arcade-feedback.correct{color:#087553}.arcade-feedback.wrong{color:#b43e38}.arcade-finish{display:grid;place-items:center;min-height:510px;padding:40px;text-align:center;background:#f3f8fb}.arcade-finish>svg{color:var(--arcade-yellow);fill:var(--arcade-yellow)}.arcade-finish h2{margin:14px 0 4px}.arcade-finish>strong{margin-bottom:24px;color:var(--arcade-blue);font-size:2rem}.arcade-finish .primary-btn{gap:8px}.race-scene{position:relative;max-width:920px;min-height:320px;margin:0 auto;overflow:hidden;border:4px solid #fff;border-radius:8px;background:#263746}.race-scene:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 74%,rgba(255,255,255,.12) 0)}.race-car{position:absolute;top:12px;z-index:4;display:grid;place-items:center;width:52px;height:42px;border-radius:6px;background:var(--arcade-yellow);color:#263746;box-shadow:0 4px 0 #b58500;transition:left .5s ease}.race-finish-line{position:absolute;right:4%;top:10px;z-index:3;color:#fff}.arcade-lanes{grid-template-columns:repeat(3,minmax(0,1fr));height:100%;min-height:320px;padding-top:64px}.arcade-lanes button{min-height:250px;border-width:0 2px 0 0;border-color:#fff;background:transparent;color:#fff}.arcade-lanes button:last-child{border-right:0}.arcade-lanes button strong{z-index:2;display:grid;place-items:center;min-width:68px;min-height:48px;padding:6px 12px;border:3px solid #fff;border-radius:6px;background:var(--arcade-blue);box-shadow:0 5px 0 #0c3d7a}.lane-dashes{position:absolute;top:0;bottom:0;left:50%;width:4px;background:repeating-linear-gradient(180deg,rgba(255,255,255,.55) 0 24px,transparent 24px 48px)}.defense-scene{display:grid;grid-template-columns:120px minmax(0,1fr);grid-gap:24px;gap:24px;align-items:center;max-width:900px;min-height:310px;margin:0 auto;padding:28px;border:2px solid #c6d6e3;border-radius:8px;background:#e5f0f7}.defense-base{display:grid;place-items:center;align-content:center;width:110px;height:150px;border:4px solid #fff;border-radius:8px;background:var(--arcade-blue);color:#fff;box-shadow:0 7px 0 #0e498e}.defense-base span{margin-top:8px;font-size:1.4rem;font-weight:900}.defense-beam{grid-column:1;display:flex;justify-content:center;color:var(--arcade-coral)}.defense-beam[data-active=true]{animation:arcade-launch .55s ease-out}.arcade-targets{grid-column:2;grid-row:1/3;grid-template-columns:repeat(3,minmax(0,1fr))}.arcade-targets button{min-height:180px;flex-direction:column;border-color:#9eb6c9;background:#fff}.arcade-targets button:nth-child(2){border-color:#e6a49f}.arcade-targets button:nth-child(3){border-color:#80c8ae}.arcade-targets button svg{color:var(--arcade-coral)}@keyframes arcade-launch{0%{transform:translateX(0)}70%{transform:translateX(230px) scale(1.25)}to{opacity:0;transform:translateX(300px)}}.fraction-scene{display:grid;grid-template-columns:minmax(220px,320px) minmax(130px,190px);align-items:center;justify-content:center;grid-gap:30px;gap:30px;max-width:760px;margin:0 auto;padding:20px}.fraction-pizza{width:100%;aspect-ratio:1;overflow:visible;filter:drop-shadow(0 8px 0 #b64b3e)}.fraction-pizza path{cursor:pointer;fill:#ffd56b;stroke:#a84238;stroke-width:3;transition:fill .15s ease,transform .15s ease;transform-origin:center}.fraction-pizza path:nth-child(2n){fill:#ffc957}.fraction-pizza path:focus,.fraction-pizza path:hover{outline:none;fill:#ff9d56}.fraction-pizza path.selected{fill:var(--arcade-coral);transform:scale(.96)}.fraction-counter{display:grid;place-items:center;min-height:100px;border:2px solid #bfd0de;border-radius:8px;background:#fff}.fraction-counter strong{color:var(--arcade-blue);font-size:2rem}.fraction-scene>.primary-btn{grid-column:2;min-height:48px}.maze-scene{max-width:820px;margin:0 auto}.maze-path{display:grid;grid-template-columns:repeat(9,1fr);align-items:center;grid-gap:5px;gap:5px;min-height:92px;padding:14px;border:3px solid var(--arcade-ink);border-radius:8px;background:#fff}.maze-path span{display:block;aspect-ratio:1;border:2px solid #b9cad8;border-radius:6px;background:#e5edf3}.maze-path span.passed{border-color:var(--arcade-green);background:#9be1c7}.maze-path span.current{border-color:var(--arcade-blue);background:var(--arcade-yellow);box-shadow:0 0 0 4px rgba(23,105,210,.15)}.maze-path svg{justify-self:center;color:var(--arcade-coral)}.arcade-maze{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:22px}.arcade-maze button{min-height:120px;background:#fff}.maze-step{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#e5edf3;color:#607489;font-size:.75rem;font-weight:900}.tower-scene{display:grid;grid-template-columns:minmax(170px,240px) minmax(0,520px);align-items:end;justify-content:center;grid-gap:36px;gap:36px;min-height:330px}.number-tower{display:flex;min-height:300px;flex-direction:column-reverse;align-items:center;justify-content:flex-start}.number-tower span{display:grid;place-items:center;width:calc(70px + var(--tower-step,0px));height:30px;margin-top:3px;border:2px solid #124d96;border-radius:5px;background:var(--arcade-blue);color:#fff;font-size:.75rem;font-weight:900;box-shadow:0 3px 0 #0c3d78}.number-tower span:nth-child(2n){background:var(--arcade-green);border-color:#0d7554;box-shadow-color:#0a6045}.number-tower svg{margin-top:12px;color:var(--arcade-coral)}.arcade-crates{grid-template-columns:repeat(3,minmax(0,1fr));align-self:center}.arcade-crates button{min-height:120px;flex-direction:column;border-color:#c49342;background:#fff5d6}.arcade-crates button svg{color:#9b6818}@media(max-width:720px){.arcade-scorebar{align-items:flex-start;flex-direction:column}.arcade-score-items{width:100%;justify-content:space-between}.arcade-score-items span{min-width:0}.arcade-stage{min-height:500px;padding:18px 12px}.arcade-question h2{min-height:40px;font-size:1.65rem}.arcade-lanes,.race-scene{min-height:300px}.arcade-lanes button{min-height:235px}.arcade-lanes button strong{min-width:0;font-size:1.05rem}.defense-scene{grid-template-columns:76px minmax(0,1fr);gap:12px;padding:15px}.defense-base{width:72px;height:118px}.arcade-targets{grid-template-columns:1fr}.arcade-targets button{min-height:64px;flex-direction:row}.fraction-scene{grid-template-columns:1fr;gap:16px}.fraction-pizza{max-width:280px;justify-self:center}.fraction-counter{min-height:72px}.fraction-scene>.primary-btn{grid-column:1}.maze-path{gap:3px;padding:9px}.arcade-crates,.arcade-maze{grid-template-columns:1fr}.arcade-crates button,.arcade-maze button{min-height:58px}.tower-scene{grid-template-columns:120px minmax(0,1fr);gap:14px}.number-tower{min-height:250px}.number-tower span{width:82px}}@media(max-width:430px){.arcade-game-name strong{max-width:200px;white-space:normal;overflow-wrap:anywhere}.arcade-score-items{font-size:.82rem}.arcade-score-items button{width:44px;height:44px}.race-car{width:44px}.arcade-lanes{gap:0}.arcade-lanes button strong{padding:5px}.defense-scene{grid-template-columns:1fr}.defense-base{width:100%;height:72px;grid-template-columns:auto auto;gap:8px}.defense-base span{margin:0}.defense-beam{display:none}.arcade-targets{grid-column:1;grid-row:auto}.tower-scene{grid-template-columns:1fr}.number-tower{min-height:190px}.maze-path{grid-template-columns:repeat(5,1fr)}.maze-path span:nth-child(n+6){display:none}}.math-arena-game{overflow:hidden;margin-top:28px;border:1px solid #b9cbd8;border-top:6px solid #59d7ff;border-radius:8px;background:#10283a;box-shadow:0 16px 38px rgba(21,48,69,.2)}.math-arena-toolbar{display:grid;grid-template-columns:1fr auto 42px;align-items:center;grid-gap:14px;gap:14px;min-height:62px;padding:9px 14px;background:#142f43;color:#fff;border-bottom:1px solid rgba(255,255,255,.16)}.math-arena-stats{display:flex;align-items:center;gap:9px}.math-arena-stats span{display:flex;align-items:center;justify-content:center;gap:5px;min-width:66px;height:38px;padding:0 9px;border:1px solid rgba(255,255,255,.2);border-radius:6px;background:rgba(255,255,255,.06)}.math-arena-stats span:first-child{color:#ffd44d}.math-arena-stats span:nth-child(2){color:#79dfb7}.math-arena-stats span:nth-child(3){color:#ff7d73}.arena-operation-tabs{display:grid;grid-template-columns:repeat(3,42px);grid-gap:5px;gap:5px}.arena-operation-tabs button,.arena-restart{display:grid;place-items:center;width:42px;height:38px;border:1px solid rgba(255,255,255,.25);border-radius:6px;background:transparent;color:#fff;font-size:1.2rem;font-weight:900}.arena-operation-tabs button:hover:not(:disabled),.arena-restart:hover{background:rgba(255,255,255,.12)}.arena-operation-tabs button.active{border-color:#ffd44d;background:#ffd44d;color:#132a3b}.arena-operation-tabs button:disabled{cursor:default;opacity:.6}.arena-restart{width:42px}.math-arena-canvas-wrap{position:relative;width:100%;aspect-ratio:16/9;min-height:500px;max-height:680px;overflow:hidden;background:#10283a;touch-action:none}.math-arena-canvas{display:block;width:100%;height:100%;cursor:crosshair;touch-action:none}.math-arena-question{position:absolute;z-index:3;top:14px;left:50%;min-width:190px;max-width:calc(100% - 130px);transform:translateX(-50%);padding:9px 18px;border:2px solid rgba(255,255,255,.7);border-radius:8px;background:rgba(7,24,36,.88);color:#fff;font-family:Cambria,Times New Roman,serif;font-size:clamp(1.25rem,3vw,2rem);font-weight:900;text-align:center;box-shadow:0 5px 0 rgba(0,0,0,.2)}.math-arena-overlay{position:absolute;z-index:4;inset:0;display:grid;place-items:center;align-content:center;grid-gap:12px;gap:12px;padding:24px;background:rgba(8,26,39,.78);color:#fff;text-align:center}.math-arena-overlay h2{margin:0;font-size:clamp(2rem,5vw,3.8rem)}.math-arena-overlay>strong{color:#ffd44d;font-size:2rem}.math-arena-overlay>button{display:flex;align-items:center;justify-content:center;gap:9px;min-width:180px;min-height:54px;border:0;border-radius:8px;background:#19b86f;color:#fff;font-size:1.05rem;font-weight:900;box-shadow:0 6px 0 #08794a}.math-arena-overlay>button:hover{transform:translateY(-2px);box-shadow:0 8px 0 #08794a}.arena-preview-cells{position:relative;width:180px;height:90px}.arena-preview-cells i{position:absolute;display:block;border:3px solid rgba(255,255,255,.7);border-radius:50%;box-shadow:0 5px 0 rgba(0,0,0,.22)}.arena-preview-cells i:first-child{left:8px;top:26px;width:54px;height:54px;background:#ef6257}.arena-preview-cells i:nth-child(2){left:67px;top:5px;width:78px;height:78px;background:#2187e7}.arena-preview-cells i:nth-child(3){right:0;top:39px;width:38px;height:38px;background:#ffd44d}.math-arena-controls{position:absolute;z-index:3;right:12px;bottom:12px;display:flex;align-items:center;gap:5px;padding:7px 9px;border:1px solid rgba(255,255,255,.22);border-radius:6px;background:rgba(7,24,36,.72);color:rgba(255,255,255,.8)}@media(max-width:720px){.math-arena-toolbar{grid-template-columns:1fr auto 38px;gap:8px;padding:8px}.math-arena-stats{gap:4px}.math-arena-stats span{min-width:0;height:36px;padding:0 7px;font-size:.78rem}.arena-operation-tabs{grid-template-columns:repeat(3,36px);gap:3px}.arena-operation-tabs button,.arena-restart{width:36px;height:36px}.math-arena-canvas-wrap{height:640px;min-height:640px;max-height:none;aspect-ratio:auto}.math-arena-question{top:10px;max-width:calc(100% - 90px);padding:7px 12px;font-size:1.35rem}.math-arena-controls{right:8px;bottom:8px}}@media(max-width:430px){.math-arena-toolbar{grid-template-columns:1fr 38px}.math-arena-stats{grid-column:1/-1;justify-content:space-between}.math-arena-stats span{flex:1 1}.arena-operation-tabs{justify-self:start}.arena-restart{grid-column:2;grid-row:2}.math-arena-canvas-wrap{height:590px;min-height:590px}.math-arena-question{max-width:calc(100% - 70px)}}.thumb-guardians{background:#e7f5ef!important;color:#226c55!important}.thumb-guardians span{display:grid;place-items:center;width:70px;height:70px;border:3px solid #226c55;border-radius:50%;background:#fff4ca;font-size:2.25rem;box-shadow:0 7px 0 #acd9c6}.guardians-game{--guardian-ink:#173b43;--guardian-green:#237a60;--guardian-green-dark:#185842;--guardian-mint:#dff3e8;--guardian-coral:#dd6859;--guardian-yellow:#f1c44d;--guardian-blue:#2b7ba3;--guardian-purple:#7256aa;--guardian-line:#c9ddd6;overflow:hidden;margin-top:28px;border:1px solid var(--guardian-line);border-top:6px solid var(--guardian-green);border-radius:8px;background:#f7fbf8;color:var(--guardian-ink);box-shadow:0 16px 38px rgba(24,74,65,.13)}.guardians-game a,.guardians-game button{letter-spacing:0}.guardians-game a:focus-visible,.guardians-game button:focus-visible,.guardians-game summary:focus-visible{outline:3px solid #e68b38;outline-offset:3px}.guardians-large-text{font-size:1.12rem}.guardians-setup{padding:0}.guardians-setup-intro{display:grid;grid-template-columns:96px minmax(0,1fr);align-items:center;grid-gap:22px;gap:22px;padding:30px 34px;border-bottom:1px solid var(--guardian-line);background:#edf8f2}.guardians-setup-intro h2{margin:5px 0 7px;font-size:2rem}.guardians-setup-intro p{max-width:760px;margin:0;color:#4f6c67;line-height:1.65}.guardians-kicker{color:var(--guardian-green);font-size:.78rem;font-weight:800}.guardians-crest{position:relative;display:grid;place-items:center;width:88px;height:88px;border:3px solid #fff;border-radius:50%;background:var(--guardian-green);color:#fff;box-shadow:0 8px 0 #b5daca}.guardians-crest svg{width:50px;height:50px}.guardians-crest span{position:absolute;font-size:1.25rem;font-weight:900;color:var(--guardian-yellow)}.guardians-setup-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:0;gap:0;border-bottom:1px solid var(--guardian-line)}.guardians-fieldset{min-width:0;margin:0;padding:22px 26px 26px;border:0;border-right:1px solid var(--guardian-line);border-bottom:1px solid var(--guardian-line)}.guardians-fieldset:nth-child(2n){border-right:0}.guardians-fieldset:nth-last-child(-n+2){border-bottom:0}.guardians-fieldset legend{display:flex;align-items:center;gap:9px;padding:0;color:var(--guardian-ink);font-weight:800}.guardians-fieldset legend span{display:grid;place-items:center;width:27px;height:27px;border-radius:50%;background:var(--guardian-green);color:#fff;font-size:.78rem}.guardians-choice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:8px;gap:8px;margin-top:14px}.guardians-choice-grid.six{grid-template-columns:repeat(3,minmax(0,1fr))}.guardians-choice-grid.skills{grid-template-columns:repeat(2,minmax(0,1fr))}.guardians-choice-grid.detail{grid-template-columns:repeat(3,minmax(0,1fr))}.guardians-choice-grid button{min-height:48px;padding:9px 10px;border:1px solid var(--guardian-line);border-radius:6px;background:#fff;color:var(--guardian-ink);font-weight:750;text-align:center}.guardians-choice-grid button:hover{border-color:#72ae98;background:#f0faf5}.guardians-choice-grid button.selected{border-color:var(--guardian-green);background:var(--guardian-mint);box-shadow:inset 0 0 0 2px var(--guardian-green)}.guardians-choice-grid button small,.guardians-choice-grid button strong{display:block}.guardians-choice-grid button small{margin-top:4px;color:#59726d;font-size:.68rem;line-height:1.35;font-weight:500}.guardians-setup-footer{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;grid-gap:16px;gap:16px;padding:22px 26px;background:#fff}.guardians-records{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.guardians-records span{display:flex;align-items:center;gap:5px;min-height:38px;padding:0 10px;border:1px solid var(--guardian-line);border-radius:6px;background:#f8fbf9;color:#526d67;font-size:.78rem}.guardians-records svg{color:var(--guardian-green)}.guardians-accessibility{grid-column:1;display:flex;gap:7px;flex-wrap:wrap}.guardians-accessibility button{display:flex;align-items:center;gap:6px;min-height:40px;padding:0 11px;border:1px solid var(--guardian-line);border-radius:6px;background:#fff;color:var(--guardian-ink);font-size:.78rem;font-weight:700}.guardians-accessibility button[aria-pressed=true]{border-color:var(--guardian-blue);background:#eaf5fa}.guardians-secondary-button,.guardians-start-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:0 21px;border:1px solid transparent;border-radius:6px;font-weight:850}.guardians-start-button{grid-column:2;grid-row:1/3;background:var(--guardian-green);color:#fff;box-shadow:0 5px 0 var(--guardian-green-dark)}.guardians-start-button:hover{transform:translateY(-1px);box-shadow:0 6px 0 var(--guardian-green-dark)}.guardians-secondary-button{border-color:var(--guardian-line);background:#fff;color:var(--guardian-ink)}.guardians-selection-summary{grid-column:2;margin:4px 0 0;color:#60766f;font-size:.72rem;text-align:center}.guardians-instructions{border-top:1px solid var(--guardian-line);background:#f0f7f3}.guardians-instructions summary{padding:16px 26px;color:var(--guardian-green-dark);font-weight:800;cursor:pointer}.guardians-instructions>div{padding:0 26px 18px;color:#526d67;line-height:1.65}.guardians-instructions p{margin:7px 0}.guardians-hud{display:grid;grid-template-columns:minmax(210px,1.5fr) repeat(4,minmax(85px,.65fr)) auto;align-items:stretch;background:#163f47;color:#fff;border-bottom:1px solid rgba(255,255,255,.15)}.guardians-health-stat,.guardians-hud-stat{display:flex;align-items:center;justify-content:center;gap:7px;min-height:62px;padding:8px 12px;border-right:1px solid rgba(255,255,255,.13)}.guardians-health-stat{display:grid;grid-template-columns:auto minmax(72px,1fr) auto}.guardians-health-stat>span,.guardians-hud-stat>span{color:#cae1dc;font-size:.7rem;font-weight:700}.guardians-health-stat>span{display:flex;align-items:center;gap:5px}.guardians-health-stat strong,.guardians-hud-stat strong{font-size:.92rem}.guardians-hud-stat{display:grid;grid-template-columns:auto 1fr;grid-gap:0 6px;gap:0 6px}.guardians-hud-stat svg{grid-row:1/3;color:var(--guardian-yellow)}.guardians-health-track,.guardians-hero-progress>div,.guardians-timer-track{overflow:hidden;height:8px;border-radius:4px;background:rgba(255,255,255,.18)}.guardians-health-track i,.guardians-hero-progress i,.guardians-timer-track i{display:block;height:100%;background:#6cd497;transition:width .2s linear}.guardians-hud-actions{display:flex;align-items:center;gap:5px;padding:0 10px}.guardians-battle-footer button,.guardians-hud-actions a,.guardians-hud-actions button{display:grid;place-items:center;width:40px;height:40px;border:1px solid rgba(255,255,255,.24);border-radius:6px;background:transparent;color:#fff}.guardians-hud-actions a:hover,.guardians-hud-actions button:hover{background:rgba(255,255,255,.12)}.guardians-battlefield-shell{position:relative;width:100%;aspect-ratio:16/9;min-height:0;overflow:hidden;background:#9fddf1}.guardians-phaser-host{display:grid;width:100%;height:100%;place-items:center;touch-action:none}.guardians-phaser-host>canvas{display:block;max-width:100%;max-height:100%;touch-action:none}.guardians-canvas-loading{display:grid;place-items:center;align-content:center;grid-gap:12px;gap:12px;width:100%;height:100%;background:#dff3e8;color:var(--guardian-green-dark);font-weight:800}.guardians-state-overlay{position:absolute;z-index:8;inset:0;display:grid;place-items:center;align-content:center;grid-gap:13px;gap:13px;background:rgba(17,52,59,.86);color:#fff;text-align:center}.guardians-state-overlay h2{margin:0;font-size:1.8rem}.guardians-state-overlay button{display:flex;align-items:center;gap:7px;min-height:48px;padding:0 18px;border:0;border-radius:6px;background:var(--guardian-yellow);color:#2b412e;font-weight:850}.guardians-state-note{position:absolute;z-index:7;top:18px;left:50%;max-width:80%;transform:translateX(-50%);padding:12px 18px;border:2px solid #fff;border-radius:6px;background:var(--guardian-purple);color:#fff;font-weight:850;text-align:center;box-shadow:0 7px 18px rgba(35,40,55,.2)}.guardians-question-panel{padding:18px 22px 20px;background:#fff;border-top:1px solid var(--guardian-line)}.guardians-question-topline{display:grid;grid-template-columns:1fr minmax(190px,320px) 1fr;align-items:center;grid-gap:14px;gap:14px;color:#5d736e;font-size:.78rem;font-weight:750}.guardians-question-topline>strong{display:flex;align-items:center;justify-content:flex-end;gap:5px;color:var(--guardian-coral);font-size:.95rem}.guardians-hero-progress{display:grid;grid-template-columns:auto minmax(80px,1fr) auto;align-items:center;grid-gap:7px;gap:7px;color:var(--guardian-green)}.guardians-hero-progress>div{background:#e3ece8}.guardians-hero-progress i{background:var(--guardian-yellow)}.guardians-timer-track{height:7px;margin:11px 0 9px;background:#e6eeeb}.guardians-timer-track i{background:var(--guardian-blue)}.guardians-question-panel>h2{display:grid;place-items:center;min-height:62px;margin:5px 0 13px;font-family:Cambria,Times New Roman,serif;font-size:2.25rem;color:#213f46}.guardians-answer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:9px;gap:9px;max-width:920px;margin:0 auto}.guardians-answer-grid.three{grid-template-columns:repeat(3,minmax(0,1fr));max-width:720px}.guardians-answer-grid button{position:relative;display:grid;grid-template-columns:28px 1fr 22px;align-items:center;grid-gap:7px;gap:7px;min-height:62px;padding:8px 11px;border:2px solid #c6d9d3;border-radius:6px;background:#f8fbf9;color:var(--guardian-ink)}.guardians-answer-grid button:hover:not(:disabled){border-color:var(--guardian-blue);background:#edf8fc;transform:translateY(-1px)}.guardians-answer-grid button>span{display:grid;place-items:center;width:27px;height:27px;border-radius:50%;background:#dfeee8;color:var(--guardian-green-dark);font-size:.75rem;font-weight:850}.guardians-answer-grid button>strong{font-size:1.35rem}.guardians-answer-grid button.correct{border-color:#2f9b6b;background:#e5f7ed;color:#155a3d}.guardians-answer-grid button.wrong{border-color:#d45b51;background:#fff0ee;color:#8b352e}.guardians-answer-grid button:disabled{cursor:default;opacity:1}.guardians-feedback{display:grid;place-items:center;min-height:30px;margin-top:8px;color:#526d67;font-size:.85rem;font-weight:750;text-align:center}.guardians-feedback.visible{color:var(--guardian-green-dark)}.guardians-battle-footer{display:flex;align-items:center;gap:8px;min-height:46px;padding:6px 14px;background:#edf5f1;color:#557069;font-size:.7rem;font-weight:700}.guardians-battle-footer span{padding-right:9px;border-right:1px solid #c5d9d2}.guardians-battle-footer span:nth-child(3){margin-left:auto;border:0}.guardians-battle-footer button{width:34px;height:32px;border-color:#a7c4ba;color:var(--guardian-green-dark)}.guardians-results{padding:34px}.guardians-results-heading{text-align:center}.guardians-results-medal{display:grid;place-items:center;width:84px;height:84px;margin:0 auto 13px;border:4px solid #fff;border-radius:50%;background:var(--guardian-yellow);color:#5b491a;box-shadow:0 8px 0 #d6ad3f}.guardians-results-heading>span{color:var(--guardian-green);font-weight:850}.guardians-results-heading h2{margin:5px 0;font-size:2.6rem}.guardians-results-heading p{margin:0;color:#647972}.guardians-results-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));grid-gap:9px;gap:9px;margin-top:26px}.guardians-results-grid article{display:grid;grid-template-columns:auto 1fr;align-items:center;grid-gap:4px 8px;gap:4px 8px;min-height:92px;padding:12px;border:1px solid var(--guardian-line);border-radius:6px;background:#fff}.guardians-results-grid article svg{grid-row:1/3;color:var(--guardian-green)}.guardians-results-grid article span{color:#647972;font-size:.68rem;font-weight:700}.guardians-results-grid article strong{font-size:1.18rem}.guardians-results-actions{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;margin-top:24px}.guardians-results-actions .guardians-start-button{grid-column:auto;grid-row:auto}@media(prefers-reduced-motion:reduce){.guardians-game *{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}.guardians-answer-grid button:hover:not(:disabled),.guardians-choice-grid button:hover,.guardians-start-button:hover{transform:none}}@media(max-width:980px){.guardians-setup-grid{grid-template-columns:1fr}.guardians-fieldset,.guardians-fieldset:nth-child(2n){border-right:0;border-bottom:1px solid var(--guardian-line)}.guardians-fieldset:last-child{border-bottom:0}.guardians-hud{grid-template-columns:minmax(210px,1.5fr) repeat(2,minmax(85px,.65fr)) auto}.guardians-hud-stat:nth-child(4),.guardians-hud-stat:nth-child(5){display:none}.guardians-results-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.guardians-results-grid article:last-child{grid-column:1/-1}}@media(max-width:640px){.guardians-game{margin-top:18px}.guardians-setup-intro{grid-template-columns:68px minmax(0,1fr);gap:14px;padding:22px 16px}.guardians-crest{width:64px;height:64px}.guardians-crest svg{width:38px;height:38px}.guardians-setup-intro h2{font-size:1.45rem}.guardians-setup-intro p{font-size:.84rem}.guardians-fieldset{padding:18px 14px 20px}.guardians-choice-grid,.guardians-choice-grid.detail,.guardians-choice-grid.six{grid-template-columns:repeat(2,minmax(0,1fr))}.guardians-choice-grid.skills,.guardians-setup-footer{grid-template-columns:1fr}.guardians-setup-footer{padding:18px 14px}.guardians-records{display:grid;grid-template-columns:1fr}.guardians-accessibility{grid-column:1;display:grid;grid-template-columns:1fr}.guardians-start-button{grid-column:1;grid-row:auto;width:100%}.guardians-selection-summary{grid-column:1}.guardians-instructions summary,.guardians-instructions>div{padding-left:16px;padding-right:16px}.guardians-hud{grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:auto auto}.guardians-health-stat{grid-column:1/4;grid-row:1;border-bottom:1px solid rgba(255,255,255,.13)}.guardians-hud-stat,.guardians-hud-stat:nth-child(4),.guardians-hud-stat:nth-child(5){display:grid;grid-row:2;min-height:48px;padding:6px}.guardians-hud-stat:nth-child(2){grid-column:1}.guardians-hud-stat:nth-child(3){grid-column:2}.guardians-hud-stat:nth-child(4){grid-column:3}.guardians-hud-stat:nth-child(5){grid-column:4}.guardians-hud-stat>span{font-size:.58rem}.guardians-hud-stat strong{font-size:.78rem}.guardians-hud-stat svg{width:15px;height:15px}.guardians-hud-actions{grid-column:4;grid-row:1;justify-content:flex-end;padding:4px}.guardians-hud-actions a,.guardians-hud-actions button{width:34px;height:36px}.guardians-question-panel{padding:14px 10px 16px}.guardians-question-topline{grid-template-columns:1fr auto}.guardians-hero-progress{grid-row:2;grid-column:1/-1}.guardians-question-panel>h2{min-height:52px;font-size:1.75rem}.guardians-answer-grid,.guardians-answer-grid.three{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.guardians-answer-grid.three button:last-child{grid-column:1/-1}.guardians-answer-grid button{min-height:58px;padding:7px}.guardians-answer-grid button>strong{font-size:1.12rem}.guardians-battle-footer span:nth-child(3){display:none}.guardians-battle-footer span:nth-child(2){margin-right:auto}.guardians-results{padding:24px 14px}.guardians-results-grid{grid-template-columns:1fr}.guardians-results-grid article:last-child{grid-column:auto}.guardians-results-actions{display:grid}.guardians-results-heading h2{font-size:2.15rem}}@media(max-width:390px){.guardians-choice-grid,.guardians-choice-grid.detail,.guardians-choice-grid.six{grid-template-columns:1fr}.guardians-answer-grid button{grid-template-columns:24px 1fr 18px}.guardians-answer-grid button>span{width:24px;height:24px}}.guardians-phaser-host{overscroll-behavior:contain}.header-inner{max-width:1440px}.main-nav{gap:3px}.main-nav .nav-link{padding-inline:8px;font-size:.73rem}.subject-menu{position:relative}.subject-menu-trigger{display:flex;align-items:center;gap:4px;border:0;background:transparent;font-family:inherit;cursor:pointer}.subject-mega-menu{position:absolute;z-index:100;top:calc(100% + 16px);left:-120px;display:grid;grid-template-columns:repeat(2,280px);grid-gap:4px;gap:4px;width:max-content;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 18px 45px rgba(24,59,86,.18)}.subject-mega-menu>a{display:flex;align-items:center;gap:10px;padding:11px;border-radius:6px}.subject-mega-menu>a:hover{background:var(--subject-soft)}.subject-mega-menu>a>span{display:grid;place-items:center;flex:0 0 38px;width:38px;height:38px;border-radius:50%;background:var(--subject-soft);color:var(--subject)}.subject-mega-menu small,.subject-mega-menu strong{display:block}.subject-mega-menu strong{font-size:.82rem}.subject-mega-menu small{margin-top:3px;color:var(--muted);font-size:.62rem}.header-actions .global-search.compact{display:block;width:220px}.global-search.compact .search-box{min-height:38px}.global-search.compact input{font-size:.72rem}.search-result small{display:block;margin-top:3px;color:var(--muted)}.stem-home{background:#f7fbff}.stem-hero{min-height:560px;display:flex;align-items:center;overflow:hidden;border-bottom:1px solid var(--line);background:#fff}.stem-hero-inner{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.8fr);align-items:center;grid-gap:60px;gap:60px;width:100%;padding-block:64px}.stem-kicker{display:inline-flex;align-items:center;gap:8px;color:#137f76;font-size:.78rem;font-weight:850}.stem-hero h1{max-width:760px;margin:13px 0 18px;color:#17324d;font-size:clamp(3rem,6vw,5.6rem);line-height:1.03}.stem-hero h1 strong{color:#246bdb}.stem-hero-copy>p{max-width:670px;color:var(--muted);font-size:1.08rem;line-height:1.75}.stem-hero-actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:27px}.stem-hero-actions a{display:inline-flex;align-items:center;gap:8px;min-height:52px;padding:0 19px;border:2px solid #246bdb;border-radius:8px;background:#246bdb;color:#fff;font-weight:850;box-shadow:0 4px 0 #164ba5}.stem-hero-actions a+a{background:#fff;color:#164ba5;box-shadow:0 4px 0 #c5d8ee}.stem-hero-scene{position:relative;min-height:390px}.stem-hero-core{position:absolute;top:50%;left:50%;display:grid;place-items:center;width:170px;height:170px;transform:translate(-50%,-50%);border:10px solid #fff;border-radius:50%;background:#ffd23f;color:#17324d;box-shadow:0 18px 40px rgba(29,76,108,.2)}.stem-hero-core span{font-weight:950}.stem-orbit{position:absolute;display:grid;place-items:center;border:5px solid #fff;border-radius:50%;font-weight:900;box-shadow:0 10px 24px rgba(29,76,108,.14)}.stem-orbit.one{top:20px;left:20%;width:90px;height:90px;background:#e9f2ff;color:#246bdb;font-size:2rem}.stem-orbit.two{right:2%;bottom:35px;width:105px;height:105px;background:#e8f7eb;color:#2b8a4b}.stem-orbit.three{top:45px;right:3%;width:82px;height:82px;background:#fff0e8;color:#c75b26}.stem-section-title{margin-bottom:22px}.stem-section-title.centered{text-align:center}.stem-page-header>span,.stem-section-title>span{color:#246bdb;font-size:.75rem;font-weight:900;text-transform:uppercase}.stem-section-title h2{margin:5px 0;font-size:clamp(1.8rem,3vw,2.55rem)}.stem-section-title p{margin:7px 0;color:var(--muted)}.stem-subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:14px;gap:14px}.stem-subject-grid.large{margin-top:24px}.stem-subject-card{display:grid;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;grid-gap:14px;gap:14px;min-height:128px;padding:20px;border:1px solid color-mix(in srgb,var(--subject) 25%,white);border-left:5px solid var(--subject);border-radius:8px;background:#fff;box-shadow:var(--shadow);transition:transform .18s ease}.stem-subject-card:hover{transform:translateY(-3px)}.stem-subject-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:50%;background:var(--subject-soft);color:var(--subject)}.stem-subject-card h3{margin:0 0 6px}.stem-subject-card p{margin:0;color:var(--muted);font-size:.76rem;line-height:1.5}.stem-subject-card>svg{color:var(--subject)}.stem-simulations-band{padding:64px 0;background:#edf8f5}.stem-resource-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:14px;gap:14px}.stem-resource-card{display:flex;flex-direction:column;min-height:250px;padding:18px;border:1px solid color-mix(in srgb,var(--subject) 24%,white);border-top:5px solid var(--subject);border-radius:8px;background:#fff;box-shadow:var(--shadow)}.stem-resource-card.is-coming{box-shadow:none}.stem-resource-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.stem-resource-top>span{display:flex;align-items:center;gap:6px;color:var(--subject);font-size:.72rem;font-weight:850}.stem-resource-top small{color:var(--muted)}.stem-resource-card h3{margin:18px 0 7px}.stem-resource-card p{margin:0;color:var(--muted);font-size:.78rem;line-height:1.6}.stem-resource-meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:auto;padding-top:17px}.stem-resource-meta b,.stem-resource-meta span{padding:5px 7px;border-radius:5px;background:var(--subject-soft);color:var(--subject);font-size:.62rem}.stem-resource-meta b{background:#fff1c7;color:#805d00}.stem-resource-action{display:flex;align-items:center;gap:5px;margin-top:13px;color:var(--subject);font-size:.75rem;font-weight:850}.stem-grade-note{display:grid;grid-template-columns:auto 1fr auto;align-items:center;grid-gap:15px;gap:15px;margin-top:20px;padding:20px;border-left:5px solid #2b8a4b;background:#fff;box-shadow:var(--shadow)}.stem-grade-note h3,.stem-grade-note p{margin:0}.stem-grade-note p{margin-top:4px;color:var(--muted)}.stem-grade-note a{display:flex;align-items:center;gap:5px;color:#164ba5;font-weight:850}.stem-learning-path{padding:28px 0;background:#183b56;color:#fff}.stem-learning-path .home-container{display:flex;align-items:center;justify-content:space-between;gap:12px}.stem-learning-path span{display:flex;align-items:center;gap:7px;font-weight:800}.stem-learning-path svg{color:#ffd23f}.stem-learning-path i{color:#8ba7bb;font-style:normal}.stem-catalog-page,.stem-topic-page{padding-top:42px;padding-bottom:72px}.stem-page-header{max-width:850px;margin-bottom:30px}.stem-page-header h1{margin:7px 0 12px;font-size:clamp(2.4rem,5vw,4.2rem)}.stem-page-header p{color:var(--muted);font-size:1rem;line-height:1.7}.stem-page-header small{display:inline-block;margin-top:8px;color:var(--subject);font-weight:800}.stem-subject-page{background:#f7fbff}.stem-subject-hero{padding:64px 0;background:var(--subject-soft);border-bottom:1px solid color-mix(in srgb,var(--subject) 25%,white)}.stem-subject-hero .stem-subject-icon{width:72px;height:72px;background:#fff}.stem-subject-hero p{margin:18px 0 0;color:var(--subject);font-size:.75rem;font-weight:900;text-transform:uppercase}.stem-subject-hero h1{margin:4px 0 10px;font-size:clamp(3rem,6vw,5rem)}.stem-subject-hero .home-container>div{max-width:720px;color:var(--muted);line-height:1.7}.stem-subject-hero nav{display:flex;gap:9px;margin-top:22px}.stem-subject-hero nav a{padding:11px 15px;border:2px solid var(--subject);border-radius:7px;background:var(--subject);color:#fff;font-weight:800}.stem-subject-hero nav a+a{background:transparent;color:var(--subject)}.stem-subject-content{padding-top:52px;padding-bottom:72px}.stem-topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px;margin-bottom:50px}.stem-topic-grid>a{display:flex;flex-direction:column;min-height:185px;padding:18px;border:1px solid var(--line);border-bottom:4px solid var(--subject);border-radius:8px;background:#fff}.stem-topic-grid span{color:var(--subject);font-size:.68rem;font-weight:850}.stem-topic-grid h3{margin:15px 0 6px}.stem-topic-grid p{margin:0;color:var(--muted);font-size:.76rem;line-height:1.55}.stem-topic-grid svg{margin-top:auto;color:var(--subject)}.stem-path-strip{display:grid;grid-template-columns:repeat(3,1fr);margin-top:45px;border:1px solid var(--line);background:#fff}.stem-path-strip>div{display:flex;align-items:center;gap:10px;padding:20px;border-right:1px solid var(--line)}.stem-path-strip>div:last-child{border:0}.stem-back,.stem-path-strip svg{color:var(--subject)}.stem-back{display:inline-flex;align-items:center;gap:6px;margin-bottom:25px;font-weight:800}.stem-empty-state{max-width:700px;padding:28px;border:1px dashed var(--subject);background:var(--subject-soft)}.grade-subject-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px;margin:20px 0}.grade-subject-strip a{padding:14px;border-left:4px solid var(--subject);background:var(--subject-soft)}.grade-subject-strip span,.grade-subject-strip strong{display:block}.grade-subject-strip span{margin-top:4px;color:var(--muted);font-size:.7rem}@media(max-width:1100px){.header-actions .global-search.compact{display:none}.stem-resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stem-hero-inner{grid-template-columns:1fr 360px}.stem-subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:900px){.stem-hero-inner{grid-template-columns:1fr}.stem-hero-scene{min-height:300px}.stem-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stem-learning-path .home-container{flex-wrap:wrap}.stem-learning-path i{display:none}}@media(max-width:720px){.stem-hero{min-height:0}.stem-hero-inner{padding-block:40px}.stem-hero h1{font-size:3rem}.stem-hero-scene{display:none}.grade-subject-strip,.stem-resource-grid,.stem-subject-grid,.stem-topic-grid{grid-template-columns:1fr}.stem-subject-card{min-height:108px;padding:15px}.stem-learning-path .home-container{display:grid;grid-template-columns:1fr 1fr}.stem-grade-note{grid-template-columns:auto 1fr}.stem-grade-note a{grid-column:1/-1}.stem-subject-hero{padding:42px 0}.stem-path-strip{grid-template-columns:1fr}.stem-path-strip>div{border-right:0;border-bottom:1px solid var(--line)}.mobile-nav-panel details summary{padding:10px 4px;font-weight:800}.mobile-nav-panel details div{display:grid;padding-left:12px}.mobile-nav-panel details a{font-size:.78rem}}@media(max-width:430px){.stem-hero h1{font-size:2.55rem}.stem-hero-actions{display:grid}.stem-hero-actions a{justify-content:center}.stem-learning-path .home-container{grid-template-columns:1fr}.stem-subject-card{grid-template-columns:50px minmax(0,1fr) auto}.stem-subject-icon{width:50px;height:50px}}@media(max-width:640px){.guardians-hud{grid-template-rows:auto auto auto}.guardians-health-stat{grid-column:1/-1}.guardians-hud-actions{grid-column:1/-1;grid-row:3;justify-content:center;padding:5px;border-top:1px solid rgba(255,255,255,.13)}.guardians-hud-actions a,.guardians-hud-actions button{width:40px;height:36px}}.math-library-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:22px 0;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:var(--shadow)}.math-library-stats>div{padding:18px 20px;border-right:1px solid var(--line)}.math-library-stats>div:last-child{border-right:0}.math-library-stats dt{color:var(--subject);font-size:1.7rem;font-weight:900}.math-library-stats dd{margin:2px 0 0;color:var(--muted);font-size:.72rem;font-weight:700}.math-library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px;margin-bottom:52px}.math-library-grid>a{display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;grid-gap:12px;gap:12px;min-height:104px;padding:16px;border:1px solid var(--line);border-left:4px solid var(--subject);border-radius:8px;background:#fff;box-shadow:var(--shadow)}.math-library-grid>a>span{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--subject-soft);color:var(--subject)}.math-library-grid h3,.math-library-grid p{margin:0}.math-library-grid p{margin-top:4px;color:var(--muted);font-size:.7rem}.math-library-grid>a>svg{color:var(--subject)}.game-subject-directory{margin:30px 0 52px}.games-math-heading{margin-top:15px}@media(max-width:900px){.math-library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){.stem-subject-hero{padding:28px 0}.stem-subject-hero .stem-subject-icon{width:58px;height:58px}.stem-subject-hero h1{font-size:2.6rem}.stem-subject-hero nav{flex-wrap:wrap}.stem-subject-content{padding-top:34px}.math-library-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.math-library-stats>div:nth-child(2){border-right:0}.math-library-stats>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.math-library-grid{grid-template-columns:1fr}}.biology-page,.cell-biology-page{background:#f7fbf8}.biology-hero{padding:64px 0;border-bottom:1px solid #cfe4d5;background:#e9f6ed}.biology-hero-inner{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(360px,.85fr);align-items:center;grid-gap:54px;gap:54px}.biology-hero-inner>div:first-child>span{display:flex;align-items:center;gap:7px;color:#216b3b;font-weight:850}.biology-hero h1{max-width:720px;margin:12px 0;font-size:clamp(3rem,6vw,5.2rem);line-height:1.06}.biology-hero p{max-width:760px;color:#526b59;font-size:1.02rem;line-height:1.75}.biology-hero nav{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}.biology-hero nav a{display:flex;align-items:center;gap:8px;min-height:50px;padding:0 18px;border:2px solid #2b8a4b;border-radius:7px;background:#2b8a4b;color:#fff;font-weight:850}.biology-hero nav a+a{background:#fff;color:#246f3e}.biology-hero-visual{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;grid-gap:7px;gap:7px;color:#39704a;text-align:center}.biology-hero-visual>span{font-size:.7rem;font-weight:850}.biology-hero-visual>i{font-style:normal}.bio-cell{position:relative;grid-column:1/-1;width:min(310px,82vw);aspect-ratio:1.25;margin:0 auto 20px;border:9px solid #448d5c;border-radius:46% 54% 48% 52%;background:#bfe0c8;box-shadow:inset 0 0 0 8px rgba(255,255,255,.55)}.bio-cell b{position:absolute;inset:33% 31%;display:grid;place-items:center;border:5px solid #765b9e;border-radius:50%;background:#a38bc1;color:#fff}.bio-cell i{position:absolute;width:18%;height:10%;border:4px solid #c85c56;border-radius:50%}.bio-cell i:first-child{top:19%;left:16%}.bio-cell i:nth-child(2){right:14%;bottom:22%}.bio-cell i:nth-child(3){left:18%;bottom:20%;border-color:#3c8b63}.biology-section{padding-top:68px;padding-bottom:68px}.biology-section-heading{margin-bottom:24px}.biology-section-heading>span{color:#287847;font-size:.72rem;font-weight:900;text-transform:uppercase}.biology-section-heading h2{margin:5px 0;font-size:clamp(1.9rem,3vw,2.7rem)}.biology-section-heading p{margin:6px 0;color:var(--muted)}.biology-world-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px}.biology-world-grid>a{display:grid;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;grid-gap:14px;gap:14px;min-height:135px;padding:18px;border:1px solid #cfe4d5;border-left:5px solid #2b8a4b;border-radius:8px;background:#fff}.biology-world-grid>a>svg:first-child{width:42px;height:42px;padding:9px;border-radius:50%;background:#e8f7eb;color:#2b8a4b}.biology-world-grid h3,.biology-world-grid p{margin:0}.biology-world-grid p{margin-top:5px;color:var(--muted);font-size:.73rem;line-height:1.5}.biology-world-grid>a>svg:last-child{color:#2b8a4b}.biology-resources-band{padding:65px 0;background:#eaf5ee}.biology-grades>div{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid #cfe4d5;background:#fff}.biology-grades a{display:flex;align-items:center;justify-content:space-between;padding:22px;border-right:1px solid #cfe4d5}.biology-grades a:last-child{border:0}.biology-grades strong{color:#2b8a4b;font-size:1.6rem}.biology-grades span{color:var(--muted);font-size:.74rem}.biology-lab-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px}.biology-lab-grid article{position:relative;min-height:195px;padding:20px;border:1px solid #d9e7dd;border-radius:8px;background:#f1f5f2;color:#6c7c70}.biology-lab-grid article.active{border-top:5px solid #2b8a4b;background:#fff;color:var(--heading)}.biology-lab-grid h3{margin:14px 0 6px}.biology-lab-grid p{color:var(--muted);font-size:.74rem}.biology-lab-grid b{position:absolute;top:14px;right:14px;padding:4px 7px;border-radius:5px;background:#e6eee8;font-size:.62rem}.biology-lab-grid article.active b{background:#e8f7eb;color:#216b3b}.biology-lab-grid a{display:flex;align-items:center;gap:5px;margin-top:16px;color:#216b3b;font-weight:850}.biology-journey{padding:64px 0;background:#173f2a;color:#fff}.biology-journey .biology-section-heading>span{color:#91d6a7}.biology-journey>div>div{display:grid;grid-template-columns:repeat(8,1fr);grid-gap:8px;gap:8px}.biology-journey div>span{position:relative;display:grid;place-items:center;min-height:105px;border-right:1px solid rgba(255,255,255,.2);font-size:.75rem;font-weight:800;text-align:center}.biology-journey div>span:last-child{border:0}.biology-journey span b{display:grid;place-items:center;width:30px;height:30px;margin-bottom:5px;border-radius:50%;background:#bce3c6;color:#173f2a}.biology-journey span i{position:absolute;right:-8px;font-style:normal;transform:rotate(-90deg)}.cell-topic-hero{padding-top:42px;padding-bottom:48px}.cell-topic-hero>span{color:#2b8a4b;font-weight:850}.cell-topic-hero h1{max-width:900px;margin:7px 0 12px;font-size:clamp(2.7rem,6vw,5rem)}.cell-topic-hero p{max-width:850px;color:var(--muted);line-height:1.75}.cell-topic-hero>a{display:inline-flex;align-items:center;gap:8px;min-height:48px;margin-top:18px;padding:0 17px;border-radius:7px;background:#2b8a4b;color:#fff;font-weight:850}.cell-objectives{display:grid;grid-template-columns:260px minmax(0,1fr);grid-gap:35px;gap:35px;padding-top:30px;padding-bottom:50px;border-top:1px solid #dbe9df}.cell-objectives header span{color:#2b8a4b;font-size:.72rem;font-weight:900}.cell-objectives h2{margin:5px 0}.cell-objectives>div{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:9px;gap:9px}.cell-objectives>div span{display:flex;align-items:center;gap:8px;padding:11px;border-bottom:1px solid #dbe9df;font-size:.78rem}.cell-objectives svg{flex:0 0 18px;color:#2b8a4b}.cell-explorer{scroll-margin-top:80px;margin-bottom:65px;border:1px solid #bdd7c5;border-top:6px solid #2b8a4b;border-radius:8px;background:#fff;box-shadow:0 16px 38px rgba(28,77,44,.1)}.cell-explorer-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:24px;border-bottom:1px solid #dce9df}.cell-explorer-header span{color:#2b8a4b;font-size:.7rem;font-weight:900}.cell-explorer-header h2{margin:3px 0;font-size:2rem}.cell-explorer-header p{max-width:680px;margin:5px 0;color:var(--muted);font-size:.78rem}.cell-mode-tabs,.cell-type-tabs,.compare-filters,.depth-picker{display:flex;gap:5px;overflow-x:auto}.cell-mode-tabs button,.cell-type-tabs button,.compare-filters button,.depth-picker button{min-height:40px;padding:0 12px;border:1px solid #cbded0;border-radius:6px;background:#fff;color:#395f45;font-size:.72rem;font-weight:800;white-space:nowrap}.cell-mode-tabs button.active,.cell-type-tabs button.active,.compare-filters button.active,.depth-picker button.active{border-color:#2b8a4b;background:#2b8a4b;color:#fff}.cell-type-tabs{padding:12px 18px;border-bottom:1px solid #dce9df}.cell-type-tabs button{min-width:120px}.cell-mode-tabs{padding:10px 18px;background:#f3f8f4}.cell-workspace{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(280px,.62fr);min-height:610px}.cell-visual-column{min-width:0;padding:18px;border-right:1px solid #dce9df;background:#f7faf8}.cell-canvas{overflow:hidden;min-height:410px;border:1px solid #d4e4d8;background:#fff}.cell-canvas svg{display:block;width:100%;height:430px;transform:scale(var(--cell-zoom));transform-origin:center;transition:transform .18s}.cell-body{fill:#d8eee0;stroke:#2f7650;stroke-width:2}.cell-body.plant{fill:#e8f2c9;stroke:#477d3f;stroke-width:4}.cell-body.bacteria{fill:#f1ddc4;stroke:#987141}.nucleus-shape{fill:#aa90c4;stroke:#705593;stroke-width:2}.nucleolus-shape{fill:#6c4c88}.vacuole-shape{fill:#c7e7ed;stroke:#65a3ad}.chloroplast-shape{fill:#72b96e;stroke:#2e8447;stroke-width:1.5}.er-shape{fill:none;stroke:#4f82b3;stroke-width:2}.golgi-shape{fill:none;stroke:#d28b31;stroke-width:2}.mito-shape{fill:#efb0aa;stroke:#c84c51;stroke-width:2}.nucleoid-shape{fill:none;stroke:#74589a;stroke-width:3}.plasmid-shape{fill:none;stroke:#b86d4d;stroke-width:2}.flagellum-shape{fill:none;stroke:#bd792b;stroke-width:2}.ribosome-dots{fill:#b34f4f}.organelle-hit{cursor:pointer;outline:none}.organelle-hit>circle{fill:#fff;stroke:#2b8a4b;stroke-width:1.5}.organelle-hit>text{font-size:3px;font-weight:900;text-anchor:middle;pointer-events:none}.organelle-hit .cell-label{paint-order:stroke;stroke:#fff;stroke-width:1.5px;font-size:3px;font-weight:750}.organelle-hit.selected>circle,.organelle-hit:focus>circle,.organelle-hit:hover>circle{fill:#ffd963;stroke:#805e00;stroke-width:2}.simulation-controls{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px}.simulation-controls button{display:flex;align-items:center;gap:6px;min-width:40px;height:40px;padding:0 9px;border:1px solid #cbded0;border-radius:6px;background:#fff;color:#27693f}.simulation-controls button span{font-size:.65rem;font-weight:800}.simulation-controls svg{width:18px}.simulation-controls strong{min-width:46px;text-align:center}.organelle-list{display:flex;gap:6px;overflow-x:auto;padding:5px 0 2px}.organelle-list button{display:flex;align-items:center;gap:6px;min-height:38px;padding:0 9px;border:1px solid #d1e1d5;border-radius:6px;background:#fff;font-size:.67rem;white-space:nowrap}.organelle-list b{display:grid;place-items:center;width:21px;height:21px;border-radius:50%;background:#e8f7eb;color:#216b3b}.organelle-list button.active{border-color:#2b8a4b;background:#e8f7eb}.organelle-panel{display:grid;grid-template-columns:46px 1fr;align-content:start;grid-gap:12px;gap:12px;padding:24px;background:#fff}.organelle-panel>span{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;color:#fff;font-weight:900}.organelle-panel small{color:#6b7d70}.organelle-panel h3{margin:1px 0 8px}.organelle-panel p{color:var(--muted);font-size:.8rem;line-height:1.6}.organelle-panel dl{margin:20px 0 0}.organelle-panel dl div{padding:12px 0;border-top:1px solid #e0eae2}.organelle-panel dt{color:#23683b;font-size:.7rem;font-weight:900}.organelle-panel dd{margin:5px 0 0;color:#52645a;font-size:.74rem;line-height:1.55}.failure-lab,.pathway-player,.structure-function{margin:0 18px 18px;padding:20px;border-left:5px solid #2b8a4b;background:#eef7f0}.failure-lab h3,.structure-function h3{margin-top:0}.cause-chain{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap}.cause-chain>span{display:flex;flex:1 1 180px;align-items:center;justify-content:center;min-height:58px;padding:10px;border:1px solid #bad6c2;border-radius:6px;background:#fff;font-size:.74rem;font-weight:750;text-align:center}.cause-chain>i{align-self:center;color:#2b8a4b;font-style:normal}.failure-lab>p{color:var(--muted);font-size:.74rem}.failure-lab select{width:min(340px,100%);height:42px;margin-bottom:16px;padding:0 10px;border:1px solid #abcbb5;border-radius:6px;background:#fff}.failure-lab .cause-chain{flex-direction:column}.failure-lab .cause-chain span{display:grid;min-height:0}.failure-lab .cause-chain i{display:block;color:#2b8a4b;font-style:normal}.pathway-player header{display:flex;align-items:center;justify-content:space-between;gap:14px}.pathway-player h3{margin:3px 0}.pathway-player header>div:last-child{display:flex;gap:5px}.pathway-player header button{width:40px;height:40px;border:1px solid #adcab6;border-radius:6px;background:#fff;color:#23683b}.pathway-steps{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:5px;gap:5px;margin-top:16px}.pathway-steps button{min-height:55px;padding:6px;border:1px solid #bdd5c4;background:#fff;font-size:.65rem;font-weight:800}.pathway-steps button.active{border-color:#2b8a4b;background:#2b8a4b;color:#fff}.pathway-player>p{min-height:45px;color:#425c4a}.cell-compare{padding:18px}.compare-table{margin-top:12px;border:1px solid #d1e1d5}.compare-head,.compare-table>button{display:grid;grid-template-columns:minmax(170px,1fr) repeat(3,minmax(95px,.45fr));align-items:center;width:100%;min-height:45px;border:0;border-bottom:1px solid #dce9df;background:#fff;text-align:center}.compare-head{background:#eef7f0}.compare-head strong:first-child,.compare-table button span{text-align:left;padding-left:12px}.compare-table button b{color:#2b8a4b}.compare-table button.selected{background:#fff4cb}.cell-compare+.organelle-panel{border-top:1px solid #dce9df}.cell-challenge{display:grid;grid-template-columns:minmax(220px,1fr) 1.3fr;grid-gap:12px 24px;gap:12px 24px;margin:18px;padding:20px;border:2px solid #d5b33e;border-radius:7px;background:#fff9df}.cell-challenge span{color:#806300;font-size:.68rem;font-weight:900}.cell-challenge h3{margin:5px 0}.cell-challenge>div:nth-child(2){display:grid;grid-template-columns:repeat(3,1fr);grid-gap:6px;gap:6px}.cell-challenge>div button{min-height:46px;border:1px solid #d8c578;border-radius:6px;background:#fff;font-size:.72rem;font-weight:800}.cell-challenge>p{min-height:24px;margin:0;color:#52645a;font-size:.74rem}.cell-challenge .next-challenge{justify-self:end;display:flex;align-items:center;gap:5px;border:0;background:transparent;color:#23683b;font-weight:850}.biology-sources,.cell-scale,.membrane-preview,.related-biology{padding-top:48px;padding-bottom:55px}.biology-sources header,.cell-scale header{display:flex;align-items:flex-start;gap:13px}.biology-sources header>svg,.cell-scale header>svg{color:#2b8a4b}.biology-sources header span,.cell-scale header span,.membrane-preview>div>span{color:#2b8a4b;font-size:.7rem;font-weight:900}.biology-sources h2,.cell-scale h2,.membrane-preview h2{margin:3px 0}.cell-scale header p{max-width:800px;color:var(--muted);font-size:.74rem}.cell-scale>div{display:grid;grid-template-columns:repeat(6,1fr);margin-top:22px;border:1px solid #cfe1d4;background:#fff}.cell-scale>div span{position:relative;display:grid;place-items:center;min-height:110px;border-right:1px solid #dbe8de}.cell-scale span:last-child{border:0}.cell-scale b{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#2b8a4b;color:#fff}.cell-scale small{color:var(--muted)}.cell-scale i{position:absolute;right:-5px;color:#2b8a4b;font-style:normal}.membrane-preview{display:grid;grid-template-columns:1fr 1fr;align-items:center;grid-gap:40px;gap:40px;border-top:1px solid #dbe8de}.membrane-preview p{color:var(--muted);line-height:1.7}.membrane-preview b{color:#765f11;font-size:.7rem}.membrane-visual{display:grid;grid-template-columns:repeat(8,1fr);grid-gap:5px;gap:5px;padding:38px;border:1px solid #c8dbce;background:#e7f3ea}.membrane-visual i{position:relative;height:65px;border-radius:50% 50% 5px 5px;background:#4f9a69}.membrane-visual i:after{content:"";position:absolute;bottom:-18px;left:45%;width:4px;height:22px;background:#4f9a69}.biology-sources>div{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:7px;gap:7px;margin-top:18px}.biology-sources a{display:grid;grid-template-columns:1fr auto;grid-gap:3px 10px;gap:3px 10px;padding:14px;border:1px solid #d5e4d8;background:#fff}.biology-sources a span{color:var(--muted);font-size:.68rem}.biology-sources a svg{grid-row:1/3;grid-column:2;color:#2b8a4b}.related-biology{border-top:1px solid #dbe8de}.related-biology>div{display:flex;gap:7px;flex-wrap:wrap}.related-biology>div a{display:flex;align-items:center;gap:7px;padding:11px 13px;border:1px solid #cbded0;border-radius:6px;background:#fff;color:#23683b;font-weight:800}@media(max-width:950px){.biology-hero-inner{grid-template-columns:1fr}.biology-hero-visual{max-width:560px}.biology-world-grid{grid-template-columns:repeat(2,1fr)}.biology-journey>div>div{grid-template-columns:repeat(4,1fr)}.cell-workspace{grid-template-columns:1fr}.cell-visual-column{border-right:0;border-bottom:1px solid #dce9df}.cell-scale>div{grid-template-columns:repeat(3,1fr)}.membrane-preview{grid-template-columns:1fr}.biology-lab-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:720px){.biology-hero{padding:36px 0}.biology-hero h1{font-size:3rem}.biology-hero-visual{display:none}.biology-section{padding-top:44px;padding-bottom:44px}.biology-lab-grid,.biology-world-grid{grid-template-columns:1fr}.biology-grades>div{grid-template-columns:repeat(2,1fr)}.biology-grades a:nth-child(2){border-right:0}.biology-grades a:nth-child(-n+2){border-bottom:1px solid #cfe4d5}.biology-journey>div>div{grid-template-columns:repeat(2,1fr)}.biology-journey div>span:nth-child(2n){border-right:0}.cell-objectives{gap:12px}.cell-objectives,.cell-objectives>div{grid-template-columns:1fr}.cell-explorer-header{flex-direction:column}.cell-mode-tabs,.cell-type-tabs,.depth-picker{width:100%}.cell-canvas{min-height:300px}.cell-canvas svg{height:320px}.simulation-controls{flex-wrap:wrap}.simulation-controls button:first-child{flex:1 1 100%}.organelle-panel{grid-template-columns:38px 1fr;padding:18px}.organelle-panel>span{width:38px;height:38px}.pathway-player header{align-items:flex-start;flex-direction:column}.pathway-steps{grid-template-columns:1fr}.cause-chain{flex-direction:column}.cause-chain>i{transform:rotate(90deg)}.cell-challenge{margin:12px}.cell-challenge,.cell-challenge>div:nth-child(2){grid-template-columns:1fr}.cell-challenge .next-challenge{justify-self:start}.compare-table{overflow-x:auto}.compare-head,.compare-table>button{min-width:560px}.cell-scale>div{grid-template-columns:repeat(2,1fr)}.cell-scale>div span:nth-child(2n){border-right:0}.biology-sources>div{grid-template-columns:1fr}.biology-sources,.cell-scale,.membrane-preview,.related-biology{padding-top:36px;padding-bottom:42px}}.cell-canvas.refined{display:grid;place-items:center;min-height:500px;padding:8px;background:#f9fcfa}.cell-canvas.refined svg{width:100%;height:auto;max-height:540px;transform:none}.cell-model-layer{transform:scale(var(--cell-zoom));transform-origin:450px 280px;transition:transform .2s ease}.cell-body.refined{fill:#d8eee0;stroke:#2e774d;stroke-width:12}.cell-body.refined.plant{fill:#e7f0d0;stroke:#477b3d}.cell-body.refined.bacteria{fill:#f1dfc7;stroke:#977140}.cell-inner-membrane{fill:none;stroke:#6fa580;stroke-width:6;stroke-dasharray:2 5}.organelle-group{cursor:pointer;outline:none;transform-box:fill-box;transform-origin:center;transition:opacity .18s ease,filter .18s ease,transform .18s ease}.organelle-group.dimmed{opacity:.38}.organelle-group.selected,.organelle-group:focus,.organelle-group:hover{opacity:1;filter:drop-shadow(0 4px 5px rgba(30,78,45,.28));transform:scale(1.04)}.cell-canvas.isolate-active .organelle-group.dimmed{opacity:.09;filter:grayscale(.8)}.cell-number-badge circle{fill:#fff;stroke:#2b8a4b;stroke-width:6}.cell-number-badge text{fill:#214b2e;font-size:15px;font-weight:900;text-anchor:middle}.cell-number-badge.selected circle{fill:#ffd85f;stroke:#796014}.cell-callout-line{fill:none;stroke:#789f83;stroke-width:2}.cell-callout-line.selected{stroke:#2b8a4b;stroke-width:4}.cell-callout-label{cursor:pointer;outline:none}.cell-callout-label rect{fill:#fff;stroke:#c8dbce;stroke-width:1.5}.cell-callout-label circle{fill:#e8f6eb;stroke:#2b8a4b;stroke-width:2}.cell-callout-label .callout-number{fill:#214b2e;font-size:11px;font-weight:900;text-anchor:middle}.cell-callout-label .callout-title{fill:#294a33;font-family:Noto Sans Georgian,sans-serif;font-size:12px;font-weight:750}.cell-callout-label.selected rect,.cell-callout-label:focus rect,.cell-callout-label:hover rect{fill:#eef8f0;stroke:#2b8a4b;stroke-width:2}.cell-callout-label.selected circle{fill:#ffd85f}.simulation-controls button.active{border-color:#2b8a4b;background:#e5f5e9;box-shadow:inset 0 0 0 1px #2b8a4b}.organelle-panel:focus{outline:3px solid rgba(43,138,75,.22);outline-offset:-3px}@media(max-width:1100px){.cell-canvas.refined{min-height:440px}.cell-callout-label .callout-title{font-size:11px}.cell-callout-label.left{transform:translateX(18px)}.cell-callout-label.right{transform:translateX(-18px)}}@media(max-width:720px){.cell-canvas.refined{min-height:300px;padding:0}.cell-canvas.refined svg{height:auto;min-height:300px}.cell-callouts{display:none}.cell-model-layer{transform:translate(-80px) scale(calc(var(--cell-zoom) * 1.27));transform-origin:450px 280px}.organelle-group.dimmed{opacity:.48}.cell-canvas.isolate-active .organelle-group.dimmed{opacity:.08}.cell-number-badge circle{stroke-width:7}.cell-number-badge text{font-size:17px}.simulation-controls button:nth-child(2){flex:1 1 auto}}.membrane-simulation{margin:22px 0 60px;border:1px solid #bcd6c4;border-top:6px solid #2b8a4b;border-radius:8px;background:#fff;box-shadow:0 16px 36px rgba(25,78,42,.09);overflow:hidden}.membrane-sim-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:24px;border-bottom:1px solid #d9e7dd}.membrane-sim-heading span{color:#267441;font-size:.72rem;font-weight:900}.membrane-sim-heading h2{margin:4px 0 7px;font-size:clamp(1.65rem,3vw,2.25rem)}.membrane-sim-heading p{max-width:730px;margin:0;color:#52665a;line-height:1.65}.simulation-disclaimer{max-width:280px;padding:11px 13px;border-left:4px solid #d1a928;background:#fff9df;color:#6f5c1d;font-size:.7rem;line-height:1.5}.transport-mode-tabs{display:flex;gap:5px;overflow-x:auto;padding:12px 18px;background:#f3f8f4}.transport-mode-tabs button{min-height:42px;padding:0 13px;border:1px solid #c5d9ca;border-radius:6px;background:#fff;color:#315f3e;font-size:.72rem;font-weight:850;white-space:nowrap}.transport-mode-tabs button.active{border-color:#2b8a4b;background:#2b8a4b;color:#fff}.membrane-sim-layout{display:grid;grid-template-columns:255px minmax(0,1fr);min-height:450px}.transport-controls{padding:20px;border-right:1px solid #d9e7dd;background:#fbfdfb}.transport-controls h3{margin:0 0 10px;font-size:.82rem}.transport-controls h3:not(:first-child){margin-top:24px}.molecule-picker{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:6px;gap:6px}.molecule-picker button{display:flex;align-items:center;gap:7px;min-height:42px;padding:0 8px;border:1px solid #d0dfd3;border-radius:6px;background:#fff;color:#344c3b;font-weight:800}.molecule-picker button i{width:13px;height:13px;border-radius:50%;background:var(--particle)}.molecule-picker button.active{border-color:var(--particle);box-shadow:inset 0 0 0 1px var(--particle);background:#f7fbf8}.concentration-stepper{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 0;border-bottom:1px solid #e0ebe2;font-size:.74rem}.concentration-stepper>div{display:flex;gap:4px}.atp-control button,.concentration-stepper button{display:grid;place-items:center;width:40px;height:40px;border:1px solid #c7daca;border-radius:6px;background:#fff;color:#246c3c}.concentration-stepper svg{width:16px}.atp-control{display:grid;grid-template-columns:24px 1fr auto auto;align-items:center;grid-gap:7px;gap:7px;margin-top:20px;padding:10px;border:1px solid #d8c771;background:#fff9df;color:#5e511c;font-size:.72rem}.atp-control svg{width:20px}.atp-control button{width:44px;height:36px;color:#6b5810}.transport-stage{min-width:0;padding:18px;background:#f5faf6}.transport-stage>header{display:flex;justify-content:space-between;gap:15px;min-height:58px}.transport-stage>header div{display:grid;grid-gap:3px;gap:3px}.transport-stage>header strong{color:#1f6638}.transport-stage>header span{max-width:680px;color:#5a6d60;font-size:.7rem;line-height:1.45}.transport-stage>header small{white-space:nowrap}.membrane-play-area{position:relative;display:grid;grid-template-columns:1fr 68px 1fr;height:345px;border:1px solid #bfd5c5;background:#fff;overflow:hidden}.membrane-compartment{position:relative;min-width:0;background:#e9f4f6}.membrane-compartment.inside{background:#f1ecf6}.membrane-compartment header{position:relative;z-index:2;display:grid;padding:10px 12px;color:#365348;font-size:.62rem}.membrane-compartment header strong{font-size:.74rem}.membrane-compartment>div{position:absolute;inset:44px 0 0}.phospholipid-membrane{position:relative;z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:space-around;background:#f9f1d2}.phospholipid-membrane>span{display:flex;align-items:center;gap:2px}.phospholipid-membrane>span i{width:9px;height:9px;border:2px solid #c39b28;border-radius:50%}.phospholipid-membrane>span b{width:18px;height:2px;background:#c39b28}.membrane-particle{position:absolute;z-index:1;display:grid;place-items:center;min-width:24px;height:24px;padding:0 4px;border:2px solid color-mix(in srgb,var(--particle),#000 14%);border-radius:50%;background:var(--particle);color:#fff;font-style:normal;box-shadow:0 2px 4px rgba(25,55,35,.16);transform:translate(-50%,-50%);transition:transform .2s,box-shadow .2s}.membrane-particle span{font-size:.5rem;font-weight:900;white-space:nowrap}.membrane-particle.selected{z-index:2;box-shadow:0 0 0 4px rgba(255,216,80,.6);transform:translate(-50%,-50%) scale(1.08)}.transport-channel,.transport-pump{position:absolute;z-index:5;left:50%;display:grid;place-items:center;width:56px;transform:translateX(-50%);border:2px solid #2f7e91;background:#cceaf0;color:#205968}.transport-channel{top:90px;height:72px}.transport-channel i{position:absolute;left:7px;width:8px;height:56px;border-radius:8px;background:#368ba0}.transport-channel i:nth-child(2){left:auto;right:7px}.transport-channel b,.transport-pump b{font-size:.55rem}.transport-pump{bottom:64px;height:68px;border-color:#b66f23;background:#f4d39f;color:#794711}.transport-pump svg{width:22px}.transport-measurements{display:grid;grid-template-columns:repeat(4,1fr) minmax(220px,1.35fr);border-top:1px solid #d9e7dd;border-bottom:1px solid #d9e7dd}.transport-measurements article,.transport-measurements>div{display:grid;align-content:start;min-width:0;padding:14px;border-right:1px solid #d9e7dd}.transport-measurements svg:not(.transport-graph){width:18px;color:#2b8a4b}.transport-measurements span{margin-top:5px;color:#617168;font-size:.61rem}.transport-measurements strong{margin-top:3px;color:#213d2a;font-size:.95rem}.transport-measurements small{color:#718078;font-size:.56rem}.transport-graph{width:100%;height:58px;margin-top:4px}.transport-graph line{stroke:#d4e2d7}.transport-graph polyline{fill:none;stroke:#2b8a4b;stroke-width:3}.membrane-sim-footer{display:grid;grid-template-columns:auto auto minmax(220px,1fr);align-items:center;grid-gap:14px;gap:14px;padding:15px 18px}.bio-playback,.speed-control{display:flex;align-items:center;gap:5px}.bio-playback button,.speed-control button{display:flex;align-items:center;justify-content:center;gap:5px;min-width:40px;height:40px;padding:0 9px;border:1px solid #c4d8c9;border-radius:6px;background:#fff;color:#246b3d}.bio-playback button:first-child{background:#2b8a4b;color:#fff}.bio-playback svg{width:17px}.bio-playback span{font-size:.65rem;font-weight:850}.bio-playback strong{min-width:36px;text-align:center}.speed-control button{font-size:.68rem;font-weight:850}.speed-control button.active{border-color:#2b8a4b;background:#e8f5eb}.membrane-sim-footer p{margin:0;color:#53665a;font-size:.68rem;line-height:1.45}.membrane-sim-link{display:inline-flex;align-items:center;gap:7px;min-height:44px;margin-top:13px;padding:0 14px;border-radius:6px;background:#2b8a4b;color:#fff;font-size:.76rem;font-weight:850}.atp-control button:focus-visible,.bio-playback button:focus-visible,.concentration-stepper button:focus-visible,.molecule-picker button:focus-visible,.speed-control button:focus-visible,.transport-mode-tabs button:focus-visible{outline:3px solid #f0c93f;outline-offset:2px}@media(max-width:1000px){.membrane-sim-layout{grid-template-columns:220px minmax(0,1fr)}.transport-measurements{grid-template-columns:repeat(4,1fr)}.transport-measurements>div{grid-column:1/-1;border-top:1px solid #d9e7dd}.membrane-sim-footer{grid-template-columns:1fr 1fr}.membrane-sim-footer p{grid-column:1/-1}.membrane-play-area{height:320px}}@media(max-width:720px){.membrane-simulation{margin-top:12px}.membrane-sim-heading{display:grid;padding:18px}.simulation-disclaimer{max-width:none}.membrane-sim-layout{display:flex;flex-direction:column}.transport-stage{order:1;padding:12px}.transport-controls{order:2;border-top:1px solid #d9e7dd;border-right:0}.membrane-play-area{grid-template-columns:1fr 52px 1fr;height:300px}.phospholipid-membrane>span:nth-of-type(2n){display:none}.transport-channel,.transport-pump{width:44px}.transport-measurements{grid-template-columns:repeat(2,1fr)}.transport-measurements article:nth-child(2n){border-right:0}.membrane-sim-footer{grid-template-columns:1fr;padding:14px}.bio-playback{justify-content:space-between}.speed-control{justify-content:center}.membrane-sim-footer p{grid-column:auto}.molecule-picker{grid-template-columns:repeat(3,1fr)}.transport-stage>header{min-height:76px}.transport-stage>header span{font-size:.64rem}}@media(prefers-reduced-motion:reduce){.membrane-particle{transition:none}}.evolution-page{background:#f8faf7}.evolution-hero{padding-top:42px;padding-bottom:48px;border-bottom:1px solid #d8e5d9}.evolution-evidence header span,.evolution-hero>span,.evolution-principles header span{color:#2b8a4b;font-size:.72rem;font-weight:900}.evolution-hero h1{margin:7px 0;font-size:clamp(2.4rem,6vw,4.6rem)}.evolution-hero p{max-width:850px;color:#53665a;font-size:1rem;line-height:1.7}.evolution-hero>a{display:inline-flex;align-items:center;gap:8px;min-height:46px;margin-top:15px;padding:0 15px;border-radius:6px;background:#2b8a4b;color:#fff;font-weight:850}.evolution-evidence,.evolution-principles{padding-top:48px;padding-bottom:52px}.evolution-evidence h2,.evolution-principles h2{margin:4px 0 22px}.evolution-principles>div{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:7px;gap:7px}.evolution-principles article{position:relative;min-height:190px;padding:18px;border-top:4px solid #2b8a4b;background:#fff;box-shadow:0 6px 18px rgba(27,68,39,.07)}.evolution-principles article>b{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#e7f5e9;color:#256c3d}.evolution-principles article h3{font-size:.9rem}.evolution-principles article p{color:#5b6c61;font-size:.72rem;line-height:1.6}.evolution-principles article>svg{position:absolute;right:-17px;top:82px;z-index:2;width:25px;color:#2b8a4b}.natural-selection-sim{scroll-margin-top:85px;margin-bottom:58px;border:1px solid #bad2bf;border-top:6px solid #2b8a4b;border-radius:8px;background:#fff;box-shadow:0 16px 38px rgba(25,72,39,.1);overflow:hidden}.natural-selection-sim>header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:22px;border-bottom:1px solid #d9e6dc}.natural-selection-sim>header span{color:#2b8a4b;font-size:.7rem;font-weight:900}.natural-selection-sim>header h2{margin:4px 0}.natural-selection-sim>header p{max-width:760px;margin:0;color:#53665a;line-height:1.6}.natural-selection-sim>header small{max-width:220px;padding:10px;border-left:4px solid #d7ac2c;background:#fff9dd;color:#69591f;line-height:1.5}.selection-environments{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:7px;gap:7px;padding:12px 18px;background:#f1f7f2}.selection-environments button{display:grid;grid-template-columns:34px 1fr;grid-template-rows:auto auto;grid-gap:2px 8px;gap:2px 8px;align-items:center;min-height:64px;padding:8px 11px;border:1px solid #c7d9cb;border-radius:6px;background:#fff;color:#345540;text-align:left}.selection-environments svg{grid-row:1/3;color:#2b8a4b}.selection-environments strong{font-size:.76rem}.selection-environments span{color:#66776b;font-size:.6rem}.selection-environments button.active{border-color:#2b8a4b;background:#e7f4e9;box-shadow:inset 0 0 0 1px #2b8a4b}.selection-workspace{display:grid;grid-template-columns:270px minmax(0,1fr);min-height:430px}.selection-inputs{padding:20px;border-right:1px solid #d9e6dc;background:#fbfdfb}.selection-inputs h3{margin:0 0 18px}.selection-inputs label{display:grid;grid-gap:8px;gap:8px;margin-bottom:20px}.selection-inputs label span{display:flex;justify-content:space-between;gap:8px;color:#4a6151;font-size:.7rem}.selection-inputs input{width:100%;accent-color:#2b8a4b}.selection-inputs>button{display:flex;align-items:center;justify-content:center;gap:7px;width:100%;min-height:42px;border:1px solid #b9d0bf;border-radius:6px;background:#fff;color:#276d3e;font-weight:850}.selection-inputs>button svg{width:17px}.selection-principle{display:grid;grid-template-columns:27px 1fr;grid-gap:8px;gap:8px;margin-top:22px;padding:11px;border-left:4px solid #d5ad2f;background:#fff9de}.selection-principle svg{width:22px;color:#7e671c}.selection-principle p{margin:0;color:#62551f;font-size:.65rem;line-height:1.5}.selection-stage{position:relative;min-width:0;padding:18px;background:#f5f9f5}.generation-badge{position:absolute;z-index:3;right:30px;top:30px;padding:7px 10px;border-radius:6px;background:rgba(255,255,255,.92);color:#3f5747;font-size:.66rem;box-shadow:0 3px 10px rgba(25,54,34,.12)}.generation-badge strong{font-size:1rem}.selection-habitat{position:relative;display:grid;grid-template-columns:repeat(9,1fr);align-content:center;grid-gap:11px;gap:11px;min-height:320px;padding:50px 28px 58px;border:1px solid #bfcfbe;overflow:hidden}.selection-habitat.light{background:#d9c9a8}.selection-habitat.dark,.selection-habitat.mixed{background:#405649}.selection-habitat.mixed:before{content:"";position:absolute;inset:0 50% 0 0;background:#d9c9a8}.selection-habitat>span{position:relative;z-index:1;display:grid;place-items:center}.selection-habitat>span svg{width:25px;height:25px;filter:drop-shadow(0 2px 2px rgba(0,0,0,.2))}.selection-habitat>span.light svg{fill:#e7d8bd;color:#806f54}.selection-habitat>span.dark svg{fill:#27332c;color:#131d17}.habitat-key{position:absolute;left:14px;bottom:12px;display:flex;gap:14px;padding:7px;background:rgba(255,255,255,.9);font-size:.6rem}.habitat-key span{display:flex;align-items:center;gap:5px}.habitat-key i{width:13px;height:13px;border:1px solid #6d765f;border-radius:50%}.habitat-key i.light{background:#e7d8bd}.habitat-key i.dark{background:#27332c}.selection-observation{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px;border:1px solid #cbdcca;border-top:0;background:#fff}.selection-observation span{color:#617067;font-size:.65rem}.selection-observation strong{color:#246b3c}.selection-results{display:grid;grid-template-columns:1fr 1fr 1.15fr 1.7fr;border-top:1px solid #d9e6dc;border-bottom:1px solid #d9e6dc}.selection-results>article,.selection-results>div{display:grid;align-content:center;min-width:0;padding:14px;border-right:1px solid #d9e6dc}.selection-results span{color:#64746a;font-size:.62rem}.selection-results strong{margin:4px 0;font-size:1rem}.selection-results article>div{height:7px;background:#edf1ed}.selection-results article>div i{display:block;height:100%;background:#bda87f}.selection-results article:nth-child(2)>div i{background:#34443a}.selection-results small{color:#78857d;font-size:.56rem}.selection-graph{width:100%;height:70px}.selection-graph line{stroke:#d9e3da}.selection-graph polyline{fill:none;stroke-width:3}.selection-graph .light-line{stroke:#b79a63}.selection-graph .dark-line{stroke:#34443a}.natural-selection-sim>footer{display:grid;grid-template-columns:auto auto minmax(230px,1fr);align-items:center;grid-gap:14px;gap:14px;padding:14px 18px}.natural-selection-sim>footer p{margin:0;color:#53665a;font-size:.68rem;line-height:1.45}.evolution-evidence>div{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:8px;gap:8px}.evolution-evidence article{padding:20px;border-left:4px solid #2b8a4b;background:#fff}.evolution-evidence svg{color:#2b8a4b}.evolution-evidence h3{font-size:.9rem}.evolution-evidence p{color:#5b6d61;font-size:.72rem;line-height:1.6}.evolution-check{display:grid;grid-template-columns:50px minmax(0,1fr);grid-gap:14px;gap:14px;margin-bottom:50px;padding-top:22px;padding-bottom:22px;border-top:1px solid #d7b74d;border-bottom:1px solid #d7b74d;background:#fff9df}.evolution-check>svg{color:#806711}.evolution-check span{color:#806711;font-size:.7rem;font-weight:900}.evolution-check h2{margin:3px 0}.evolution-check p{max-width:880px;margin-bottom:0;color:#635b3e;line-height:1.6}@media(max-width:950px){.evolution-principles>div{grid-template-columns:repeat(2,1fr)}.evolution-principles article>svg{display:none}.selection-workspace{grid-template-columns:230px minmax(0,1fr)}.selection-habitat{grid-template-columns:repeat(6,1fr)}.selection-results{grid-template-columns:repeat(3,1fr)}.selection-results>div{grid-column:1/-1;border-top:1px solid #d9e6dc}.natural-selection-sim>footer{grid-template-columns:1fr 1fr}.natural-selection-sim>footer p{grid-column:1/-1}}@media(max-width:720px){.evolution-hero{padding-top:28px}.evolution-evidence>div,.evolution-principles>div{grid-template-columns:1fr}.evolution-principles article{min-height:0}.natural-selection-sim>header{display:grid;padding:18px}.natural-selection-sim>header small{max-width:none}.selection-environments{display:flex;overflow-x:auto}.selection-environments button{min-width:190px}.selection-workspace{display:flex;flex-direction:column}.selection-stage{order:1;padding:12px}.selection-inputs{order:2;border-top:1px solid #d9e6dc;border-right:0}.selection-habitat{grid-template-columns:repeat(6,1fr);gap:8px;min-height:300px;padding:55px 18px}.selection-habitat>span svg{width:21px}.selection-results{grid-template-columns:repeat(2,1fr)}.selection-results article:nth-child(2n){border-right:0}.selection-results article:nth-child(3){grid-column:1/-1;border-top:1px solid #d9e6dc}.natural-selection-sim>footer{grid-template-columns:1fr}.natural-selection-sim>footer p{grid-column:auto}.natural-selection-sim .bio-playback{justify-content:space-between}.evolution-check{grid-template-columns:38px 1fr}.evolution-check h2{font-size:1.1rem}}.genetics-page{background:#f8faf7;color:#183c29}.genetics-hero{padding:42px 0 50px;border-bottom:1px solid #d7e5da;background:#edf7ef}.genetics-hero .breadcrumbs{display:flex;align-items:center;gap:8px;margin-bottom:28px;color:#5e7465;font-size:.72rem}.genetics-hero .breadcrumbs a{color:#287746;font-weight:800}.genetics-concepts header>span,.genetics-hero>div>span,.genetics-process header>span{color:#2b8a4b;font-size:.72rem;font-weight:900}.genetics-hero h1{margin:7px 0 10px;font-size:4rem;line-height:1.05}.genetics-hero p{max-width:850px;margin:0;color:#52675a;line-height:1.75}.genetics-hero>a{display:inline-flex;align-items:center;gap:8px;min-height:46px;margin-top:18px;padding:0 16px;border-radius:6px;background:#286f43;color:#fff;font-weight:850}.genetics-hero>a svg{width:18px}.genetics-concepts{padding-top:46px;padding-bottom:50px}.genetics-concepts h2,.genetics-process h2{margin:5px 0 24px;font-size:1.8rem}.genetics-concepts>div{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #cdded1;border-bottom:1px solid #cdded1}.genetics-concepts article{min-width:0;padding:22px;border-right:1px solid #cdded1}.genetics-concepts article:last-child{border-right:0}.genetics-concepts article svg{width:24px;color:#2b8a4b}.genetics-concepts h3{margin:10px 0 5px;font-size:.92rem}.genetics-concepts p{margin:0;color:#607066;font-size:.72rem;line-height:1.65}.genetics-simulation{scroll-margin-top:88px;margin-bottom:60px;border:1px solid #b9d2bf;border-top:6px solid #2b8a4b;border-radius:8px;background:#fff;box-shadow:0 16px 38px rgba(27,69,40,.1);overflow:hidden}.genetics-simulation>header{display:flex;align-items:flex-start;justify-content:space-between;gap:28px;padding:22px;border-bottom:1px solid #d8e5db}.genetics-simulation>header>div:first-child{max-width:720px}.genetics-probabilities>header span,.genetics-simulation>header span,.offspring-lab>header span{color:#2b8a4b;font-size:.68rem;font-weight:900}.genetics-simulation>header h2{margin:5px 0 7px;font-size:1.55rem}.genetics-simulation>header p{margin:0;color:#596d60;font-size:.78rem;line-height:1.6}.genetics-allele-key{display:grid;grid-gap:7px;gap:7px;min-width:230px;padding-left:18px;border-left:1px solid #d6e2d8}.genetics-allele-key span{display:grid;grid-template-columns:32px 1fr;align-items:center;grid-gap:8px;gap:8px;color:#53685a;font-size:.66rem}.genetics-allele-key b{display:grid;place-items:center;width:30px;height:30px;border:1px solid #9dc3a7;border-radius:50%;background:#eaf5ec;color:#246d3f;font-size:.85rem}.genetics-patterns{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:7px;gap:7px;padding:12px 18px;background:#f2f7f3}.genetics-patterns button{display:grid;grid-gap:4px;gap:4px;min-height:68px;padding:11px;border:1px solid #c5d7c8;border-radius:6px;background:#fff;color:#264e34;text-align:left}.genetics-patterns button strong{font-size:.76rem}.genetics-patterns button span{color:#6a786e;font-size:.6rem;line-height:1.45}.genetics-patterns button.active{border-color:#2b8a4b;background:#e6f3e9;box-shadow:inset 0 0 0 1px #2b8a4b}.genetics-parent-row{display:grid;grid-template-columns:minmax(0,1fr) 38px minmax(0,1fr);align-items:end;grid-gap:12px;gap:12px;padding:20px 22px;border-top:1px solid #dce7de;border-bottom:1px solid #dce7de;background:#fcfdfc}.genetics-parent{display:grid;grid-gap:7px;gap:7px}.genetics-parent>span{color:#52665a;font-size:.68rem;font-weight:800}.genetics-parent>div{display:grid;grid-template-columns:46px minmax(0,1fr);align-items:center;grid-gap:9px;gap:9px}.genetics-parent select{width:100%;min-height:46px;padding:0 10px;border:1px solid #b9cdbd;border-radius:6px;background:#fff;color:#234e32;font:inherit;font-size:.72rem;font-weight:800}.genetics-cross{display:grid;place-items:center;width:38px;height:38px;margin-bottom:4px;border-radius:50%;background:#f4d87a;color:#55450c;font-size:1.2rem;font-weight:900}.genetics-flower{--flower-color:#7654a8;display:inline-grid;place-items:center;flex:0 0 auto;width:38px;height:38px;border:1px solid color-mix(in srgb,var(--flower-color),#526 18%);border-radius:50%;background:color-mix(in srgb,var(--flower-color),#fff 24%);color:var(--flower-color)}.genetics-flower svg{width:25px;height:25px;fill:currentColor;stroke:#3d3147;stroke-width:1.2}.genetics-flower.spotted{background:conic-gradient(#c84955 0 25%,#f7f4ee 25% 50%,#c84955 50% 75%,#f7f4ee 75%);color:#d76369}.genetics-workspace{display:grid;grid-template-columns:minmax(420px,1.25fr) minmax(300px,.75fr);min-height:450px}.punnett-wrap{display:grid;align-content:start;padding:24px;border-right:1px solid #d9e5dc;background:#f8fbf8}.punnett-axis-top{text-align:center;color:#5e7165;font-size:.65rem;font-weight:800}.punnett-square{display:grid;grid-template-columns:64px repeat(2,minmax(120px,1fr));margin-top:8px;border:1px solid #a9c2ae;border-right:0;border-bottom:0;background:#fff}.punnett-row{display:contents}.punnett-cell,.punnett-corner,.punnett-gamete{display:grid;place-items:center;min-width:0;border-right:1px solid #a9c2ae;border-bottom:1px solid #a9c2ae}.punnett-corner{min-height:58px;background:#e8f3ea;color:#2b8a4b}.punnett-corner svg{width:24px}.punnett-gamete{min-height:58px;background:#e8f3ea;color:#256c3d;font-size:1rem;font-weight:900}.punnett-cell{align-content:center;gap:5px;min-height:130px;padding:10px;background:#fff}.punnett-cell b{font-size:.8rem}.punnett-cell small{color:#65736a;font-size:.61rem}.punnett-wrap>p{margin:12px 0 0;color:#607166;font-size:.64rem;line-height:1.5}.genetics-probabilities{padding:24px;background:#fff}.genetics-probabilities>header h3,.offspring-lab>header h3{margin:4px 0 18px;font-size:1rem}.genotype-bars{display:grid;grid-gap:16px;gap:16px}.genotype-bars>div{display:grid;grid-template-columns:100px minmax(80px,1fr) 42px;align-items:center;grid-gap:9px;gap:9px}.genotype-bars span{display:grid}.genotype-bars span b{font-size:.75rem}.genotype-bars span small{color:#69786e;font-size:.58rem}.genotype-bars>div>div{height:9px;background:#edf1ed}.genotype-bars i{display:block;height:100%;background:#6f5aa5}.genotype-bars>div:nth-child(2) i{background:#c46977}.genotype-bars>div:nth-child(3) i{background:#d5b94d}.genotype-bars>div>strong{font-size:.72rem;text-align:right}.phenotype-ratio{display:grid;grid-gap:6px;gap:6px;margin-top:24px;padding:14px;border-left:4px solid #d5b64e;background:#fff9df}.phenotype-ratio span{color:#6c5b1f;font-size:.65rem}.phenotype-ratio b{color:#514817;font-size:.68rem}.offspring-lab{border-top:1px solid #d8e4da}.offspring-lab>header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:20px 22px;background:#fbfdfb}.offspring-lab>header h3{margin-bottom:5px}.offspring-lab>header p{max-width:690px;margin:0;color:#65756a;font-size:.66rem;line-height:1.55}.offspring-lab>header>div:last-child{display:flex;align-items:center;gap:7px}.offspring-lab button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;padding:0 12px;border:1px solid #a9c6b0;border-radius:6px;background:#fff;color:#276d3f;font-size:.66rem;font-weight:850}.offspring-lab button:nth-child(2){border-color:#2b8a4b;background:#2b8a4b;color:#fff}.offspring-lab button:last-child{width:40px;padding:0}.offspring-lab button svg{width:16px}.offspring-lab button:disabled{cursor:not-allowed;opacity:.45}.offspring-garden{display:grid;grid-template-columns:repeat(20,minmax(30px,1fr));grid-gap:7px;gap:7px;max-height:258px;padding:20px 22px;overflow:auto;border-top:1px solid #e0e9e2;background:#f1eee1}.offspring-garden .genetics-flower{width:32px;height:32px}.offspring-garden .genetics-flower svg{width:21px}.observed-results{display:flex;align-items:center;gap:16px;min-height:48px;padding:8px 22px;border-top:1px solid #dce7de;background:#fff;color:#566a5d;font-size:.66rem;overflow-x:auto}.observed-results>strong{color:#214f32;white-space:nowrap}.observed-results span{white-space:nowrap}.offspring-empty{display:grid;place-items:center;grid-gap:4px;gap:4px;min-height:150px;padding:22px;border-top:1px solid #e0e9e2;background:#f8faf8;color:#708078;text-align:center}.offspring-empty svg{width:34px;color:#83a28b}.offspring-empty p{margin:0;font-size:.68rem}.genetics-process{padding:48px 0;background:#eef5ef;border-top:1px solid #d2e0d5;border-bottom:1px solid #d2e0d5}.genetics-process>div>div{display:grid;grid-template-columns:1fr 34px 1fr 34px 1fr 34px 1fr;align-items:center}.genetics-process article{min-height:140px;padding:18px;border-top:4px solid #2b8a4b;background:#fff}.genetics-process article>b{color:#2b8a4b;font-size:.7rem}.genetics-process article h3{margin:9px 0 4px;font-size:.92rem}.genetics-process article p{margin:0;color:#67776c;font-size:.66rem;line-height:1.5}.genetics-process>div>div>svg{justify-self:center;color:#2b8a4b}.genetics-notes{display:grid;grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px;padding-top:48px;padding-bottom:48px}.genetics-notes article{padding:22px;border-top:4px solid #d1aa2d;background:#fff}.genetics-notes article:nth-child(2){border-color:#6f5aa5}.genetics-notes span{color:#806711;font-size:.68rem;font-weight:900}.genetics-notes article:nth-child(2) span{color:#604b92}.genetics-notes h2{margin:6px 0 8px;font-size:1.05rem}.genetics-notes p{margin:0;color:#5f6f65;font-size:.72rem;line-height:1.7}.genetics-page .related-biology{display:flex;align-items:center;justify-content:space-between;padding-bottom:46px}.genetics-page .related-biology>a:last-child{display:inline-flex;align-items:center;gap:7px;color:#287746;font-size:.72rem;font-weight:850}@media(max-width:980px){.genetics-concepts>div{grid-template-columns:repeat(2,1fr)}.genetics-concepts article:nth-child(2){border-right:0}.genetics-concepts article:nth-child(-n+2){border-bottom:1px solid #cdded1}.genetics-workspace{grid-template-columns:1fr}.punnett-wrap{border-right:0;border-bottom:1px solid #d9e5dc}.offspring-garden{grid-template-columns:repeat(12,minmax(30px,1fr))}.genetics-process>div>div{grid-template-columns:1fr 24px 1fr 24px 1fr 24px 1fr}}@media(max-width:720px){.genetics-hero{padding:28px 0 36px}.genetics-hero .breadcrumbs{margin-bottom:18px}.genetics-hero h1{font-size:2.6rem}.genetics-concepts{padding-top:36px;padding-bottom:38px}.genetics-concepts h2,.genetics-process h2{font-size:1.35rem}.genetics-concepts>div{grid-template-columns:1fr}.genetics-concepts article{border-right:0;border-bottom:1px solid #cdded1}.genetics-concepts article:last-child{border-bottom:0}.genetics-simulation>header{display:grid;padding:18px}.genetics-allele-key{min-width:0;padding:12px 0 0;border-top:1px solid #d6e2d8;border-left:0}.genetics-patterns{display:flex;overflow-x:auto}.genetics-patterns button{flex:0 0 210px}.genetics-parent-row{grid-template-columns:1fr;padding:18px}.genetics-cross{margin:0 auto}.genetics-workspace{display:block;min-height:0}.punnett-wrap{padding:14px}.punnett-square{grid-template-columns:48px repeat(2,minmax(0,1fr))}.punnett-cell{min-height:112px;padding:7px}.punnett-cell .genetics-flower{width:34px;height:34px}.punnett-cell small{font-size:.56rem}.genetics-probabilities{padding:18px}.genotype-bars>div{grid-template-columns:82px minmax(60px,1fr) 38px}.offspring-lab>header{display:grid;padding:18px}.offspring-lab>header>div:last-child{display:grid;grid-template-columns:1fr 1fr 40px}.offspring-lab button{padding:0 8px}.offspring-garden{grid-template-columns:repeat(6,minmax(32px,1fr));padding:16px}.observed-results{align-items:flex-start;flex-direction:column;gap:5px;padding:12px 18px;overflow:visible}.genetics-process{padding:38px 0}.genetics-process>div>div{grid-template-columns:1fr}.genetics-process>div>div>svg{transform:rotate(90deg)}.genetics-process article{min-height:0}.genetics-notes{grid-template-columns:1fr;padding-top:38px;padding-bottom:38px}.genetics-page .related-biology{align-items:flex-start;flex-direction:column;gap:16px}}@media(prefers-reduced-motion:reduce){.selection-habitat>span svg{transition:none}}.biology-all-domains{padding-bottom:48px}.biology-all-domains>div{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #d4e4d8;border-left:1px solid #d4e4d8}.biology-all-domains a{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:52px;padding:10px 12px;border-right:1px solid #d4e4d8;border-bottom:1px solid #d4e4d8;background:#fff;color:#285f39;font-size:.72rem;font-weight:800}.biology-all-domains a:hover{background:#edf7ef}.biology-all-domains svg{width:16px}.biology-mini-experiment{display:grid;grid-template-columns:minmax(270px,.75fr) minmax(0,1.25fr);grid-gap:28px;gap:28px;margin-bottom:54px;padding:22px;border:1px solid #bad5c1;border-top:5px solid #2b8a4b;background:#fff;box-shadow:0 12px 28px rgba(30,77,43,.08)}.biology-mini-experiment>div:first-child>span{color:#2b8a4b;font-size:.7rem;font-weight:900}.biology-mini-experiment h2{margin:4px 0}.biology-mini-experiment p{color:#5c6c61;font-size:.72rem}.mini-concentrations{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:7px;gap:7px}.mini-concentrations>div{display:grid;grid-template-columns:1fr auto auto;align-items:center;grid-gap:5px;gap:5px;padding:9px;border:1px solid #d1e1d5}.mini-concentrations span{grid-column:1/-1;color:#66776b;font-size:.58rem}.mini-concentrations strong{font-size:1.1rem}.mini-concentrations button,.mini-experiment-actions button{display:grid;place-items:center;width:38px;height:38px;border:1px solid #c1d7c7;background:#fff;color:#246a3d}.mini-concentrations svg{width:15px}.mini-experiment-actions{display:flex;align-items:center;gap:6px;margin-top:10px}.mini-experiment-actions a,.mini-experiment-actions>button:first-child{display:flex;align-items:center;gap:6px;min-height:40px;padding:0 11px;background:#2b8a4b;color:#fff;font-size:.68rem;font-weight:850}.mini-experiment-actions a{margin-left:auto;background:transparent;color:#276c3d}.mini-diffusion-view{position:relative;display:grid;grid-template-columns:1fr 66px 1fr;min-height:240px;border:1px solid #c7d9cc;overflow:hidden}.mini-diffusion-view>div{display:flex;align-content:flex-start;gap:8px;flex-wrap:wrap;padding:25px;background:#e8f3f5}.mini-diffusion-view>div:nth-of-type(2){background:#f1edf6}.mini-diffusion-view i{width:20px;height:20px;border-radius:50%;background:#287fbd;box-shadow:inset 0 0 0 2px #1f6698}.mini-diffusion-view>b{display:grid;place-items:center;padding:5px;background:#f7edc8;color:#6e5b20;font-size:.55rem;text-align:center;writing-mode:vertical-rl}.mini-diffusion-view>span{position:absolute;left:50%;bottom:10px;transform:translateX(-50%);min-width:180px;padding:6px;background:rgba(255,255,255,.92);color:#285e39;font-size:.63rem;font-weight:850;text-align:center}.biology-grades button{border:0;background:#fff;color:inherit}.biology-grades button.active{background:#2b8a4b;color:#fff}.biology-grade-results{display:block!important;margin-top:18px;padding:18px;border:1px solid #d1e2d5;background:#f8fbf9}.biology-grade-results h3{margin:8px 0 10px;font-size:.82rem}.biology-grade-results>div:not(.stem-resource-grid){display:flex;gap:6px;flex-wrap:wrap}.biology-grade-results>div:not(.stem-resource-grid) a{display:flex;align-items:center;gap:6px;padding:8px 10px;border:1px solid #c9dccf;background:#fff;color:#28643b;font-size:.66rem;font-weight:800}.biology-grade-results svg{width:14px}.membrane-v2 .v2-stage{padding:18px}.membrane-canvas-wrap{position:relative}.membrane-canvas{display:block;width:100%;height:400px;border:1px solid #bcd2c3;background:#fff}.canvas-status{position:absolute;left:12px;bottom:11px;max-width:70%;padding:6px 8px;background:rgba(255,255,255,.9);color:#315a3d;font-size:.58rem;font-weight:750}.cell-volume-response{display:flex;align-items:center;justify-content:center;gap:16px;padding:12px;border:1px solid #c9dacd;border-top:0;background:#f7faf7}.cell-volume-response>div{display:grid;place-items:center;width:calc(52px * var(--cell-volume) / 100);height:calc(52px * var(--cell-volume) / 100);min-width:38px;min-height:38px;max-width:72px;max-height:72px;border:3px solid #397b50;border-radius:50%;background:#d9eee0;transition:width .35s,height .35s}.cell-volume-response>div.plant{border-width:6px;border-radius:6px;background:#e5efc8}.cell-volume-response svg{width:20px;color:#2e91a8}.cell-volume-response span{font-size:.68rem}.pump-cycle{display:grid;grid-template-columns:30px 1fr auto;align-items:center;grid-gap:10px;gap:10px;padding:10px 14px;border:1px solid #d1b45b;border-top:0;background:#fff8df;color:#695618}.pump-cycle>svg{width:24px}.pump-cycle>span{font-size:.67rem;font-weight:800}.pump-cycle>div{display:flex;gap:4px}.pump-cycle i{width:8px;height:8px;border:1px solid #9c8131;border-radius:50%}.pump-cycle i.active{background:#e4b62c}.v2-measurements{grid-template-columns:repeat(5,1fr)}.membrane-v2-workspace{display:grid;grid-template-columns:300px minmax(0,1fr);border-bottom:1px solid #d7e4da}.v2-controls{border-right:1px solid #d7e4da}.v2-controls details{margin-top:18px}.v2-controls summary{cursor:pointer;color:#2a663c;font-size:.75rem;font-weight:900}.protein-palette{display:grid;grid-gap:6px;gap:6px;margin-top:9px}.protein-palette>div{display:grid;grid-template-columns:1fr 34px 25px 34px;align-items:center;grid-gap:3px;gap:3px}.protein-palette button{min-height:34px;border:1px solid #ccdcd0;background:#fff;color:#365743}.protein-palette>div>button:first-child{display:grid;padding:5px 7px;text-align:left;font-size:.62rem;font-weight:800}.protein-palette>div>button:first-child span{color:#7b887f;font-size:.52rem}.protein-palette>div>button:first-child.enabled{border-left:4px solid #2b8a4b;background:#eef7f0}.protein-palette strong{text-align:center;font-size:.7rem}.cell-type-control{display:grid;grid-gap:5px;gap:5px;margin-top:16px;color:#506258;font-size:.67rem}.cell-type-control select{height:40px;border:1px solid #c6d9cb;background:#fff}.transport-analysis{min-width:0;padding:20px}.transport-analysis>header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.transport-analysis header span{color:#2b8a4b;font-size:.62rem;font-weight:900}.transport-analysis h3{margin:3px 0}.transport-analysis header button{min-height:38px;border:1px solid #c5d9ca;background:#fff;color:#276c3d;font-size:.62rem;font-weight:800}.graph-legend{display:flex;gap:13px;margin-top:14px;color:#68766d;font-size:.6rem}.graph-legend span{display:flex;align-items:center;gap:5px}.graph-legend i{width:20px;height:3px;background:#287fbd}.graph-legend span:nth-child(2) i{background:#bd4d73}.concentration-graph{width:100%;height:180px;border-bottom:1px solid #dbe5dd}.concentration-graph line{stroke:#d7e2d9}.concentration-graph polyline{fill:none;stroke-width:3}.concentration-graph .outside-line{stroke:#287fbd}.concentration-graph .inside-line{stroke:#bd4d73}.gradient-bars{display:grid;grid-gap:8px;gap:8px;margin:14px 0}.gradient-bars span{display:grid;grid-template-columns:52px 1fr 32px;align-items:center;grid-gap:7px;gap:7px;color:#5d6d63;font-size:.6rem}.gradient-bars i{height:9px;background:#e9eeea}.gradient-bars b{display:block;height:100%;background:#287fbd}.gradient-bars span:nth-child(2) b{background:#bd4d73}.mechanism-explanation{padding:13px;border-left:4px solid #2b8a4b;background:#eff7f1}.mechanism-explanation strong{font-size:.7rem}.mechanism-explanation p{margin:4px 0 0;color:#53665a;font-size:.68rem;line-height:1.5}.transport-presets{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid #d7e4da}.transport-presets>span{color:#56685d;font-size:.65rem;font-weight:900;white-space:nowrap}.transport-presets>div{display:flex;gap:5px;overflow-x:auto}.transport-presets button{min-height:38px;padding:0 10px;border:1px solid #c7d9cb;background:#fff;color:#2a673d;font-size:.62rem;font-weight:800;white-space:nowrap}.predict-workflow{margin:18px;padding:18px;border:1px solid #d5bd6d;background:#fffaf0}.predict-workflow header>span{color:#7d6618;font-size:.65rem;font-weight:900}.predict-workflow h3{margin:3px 0}.predict-workflow header p{color:#5e5949}.predict-workflow>div{display:flex;gap:7px;flex-wrap:wrap}.predict-workflow label{display:flex;align-items:center;gap:6px;min-height:42px;padding:7px 10px;border:1px solid #dccd99;background:#fff;font-size:.66rem}.predict-workflow input{accent-color:#2b8a4b}.predict-workflow footer{display:flex;gap:6px;margin-top:12px}.predict-workflow button{min-height:40px;padding:0 11px;border:1px solid #bfa85b;background:#fff;color:#675516;font-weight:800}.predict-workflow button:nth-child(2){background:#2b8a4b;color:#fff;border-color:#2b8a4b}.predict-workflow button:disabled{opacity:.5}.predict-workflow>p{padding:10px;background:#eef7f0;color:#365744;font-size:.68rem}.biology-grades button:focus-visible,.biology-mini-experiment button:focus-visible,.membrane-v2 button:focus-visible{outline:3px solid #f0c83f;outline-offset:2px}@media(max-width:1000px){.biology-all-domains>div{grid-template-columns:repeat(3,1fr)}.membrane-v2-workspace{grid-template-columns:260px minmax(0,1fr)}.v2-measurements{grid-template-columns:repeat(3,1fr)}.v2-measurements article:nth-child(4),.v2-measurements article:nth-child(5){border-top:1px solid #d9e7dd}}@media(max-width:720px){.biology-all-domains>div{grid-template-columns:repeat(2,1fr)}.biology-mini-experiment{grid-template-columns:1fr;padding:15px}.mini-diffusion-view{min-height:210px}.mini-experiment-actions{flex-wrap:wrap}.mini-experiment-actions a{margin-left:0}.membrane-canvas{height:330px}.membrane-v2-workspace{display:flex;flex-direction:column}.transport-analysis{order:2}.v2-controls{order:1;border-top:1px solid #d7e4da;border-right:0}.v2-measurements{grid-template-columns:repeat(2,1fr)}.v2-measurements article{border-top:1px solid #d9e7dd}.transport-presets{align-items:flex-start;flex-direction:column}.predict-workflow{margin:12px}.predict-workflow footer,.predict-workflow>div{display:grid}.predict-workflow label{width:100%}.concentration-graph{height:140px}.pump-cycle{grid-template-columns:26px 1fr}.pump-cycle>div{grid-column:1/-1}.canvas-status{max-width:90%}}.electrochemical-forces{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:6px;gap:6px;margin:12px 0}.electrochemical-forces span{display:grid;grid-gap:4px;gap:4px;padding:9px;border:1px solid #cbded0;background:#f7faf8;color:#56685d;font-size:.6rem}.electrochemical-forces b{color:#276b3e;font-size:.82rem}.cell-volume-response>div.generic{border-radius:18px;background:#edf5ef}@media(max-width:720px){.electrochemical-forces{grid-template-columns:1fr}}.osmosis-cell-response{display:grid;grid-template-columns:180px 1fr;align-items:center;grid-gap:16px;gap:16px;padding:12px 18px;border:1px solid #c9dacd;border-top:0;background:#f7faf7}.osmosis-cell-response svg{width:180px;height:130px}.osmosis-cell-response>div{display:grid;grid-gap:3px;gap:3px}.osmosis-cell-response span{color:#5b6d61;font-size:.62rem;font-weight:800}.osmosis-cell-response strong{color:#28633b;font-size:1rem}.osmosis-cell-response small{color:#627268;font-size:.66rem}.osmosis-cell-response.warning strong{color:#86610e}.osmosis-cell-response.danger strong{color:#a43c38}.plant-wall{fill:#e8efce;stroke:#497c3e;stroke-width:7}.plant-membrane{fill:#d4eddd;stroke:#2f8a54;stroke-width:4}.plant-membrane,.plant-vacuole{transition:x .35s,y .35s,width .35s,height .35s}.plant-vacuole{fill:#bfe4ed;stroke:#5299aa;stroke-width:3}.animal-cell{fill:#d9eee0;stroke:#397b50;stroke-width:5;transition:transform .35s}.water-arrows{fill:none;stroke:#2e91a8;stroke-width:5;stroke-linecap:round}.water-arrows.in path:first-child{marker-end:none}.water-arrows.in path:first-child,.water-arrows.out path:last-child{transform-origin:center}.water-arrows.in path:first-child{d:path("M10 65h38")}.water-arrows.in path:last-child{d:path("M170 65h-38")}.water-arrows.out path:first-child{d:path("M48 65H10")}.water-arrows.out path:last-child{d:path("M132 65h38")}.water-arrows.balanced{stroke-dasharray:5 5}.cell-process-layer{pointer-events:none}.cell-process-route{fill:none;stroke:#65a87b;stroke-width:5;stroke-dasharray:8 7;opacity:.7}.cell-process-route.completed{stroke:#267449;stroke-dasharray:none}.cell-process-cargo{fill:#f1bd32;stroke:#735c12;stroke-width:4;filter:drop-shadow(0 3px 4px rgba(35,73,45,.25));animation:cell-cargo-pulse 1.1s ease-in-out infinite}.cytoplasm-particle{fill:#77b48b;opacity:.55;animation:cytoplasm-drift 4s ease-in-out infinite}.cytoplasm-particle:nth-child(2){animation-delay:-1.3s}.cytoplasm-particle:nth-child(3){animation-delay:-2.4s}@keyframes cell-cargo-pulse{50%{opacity:.55;transform:scale(1.18)}}@keyframes cytoplasm-drift{50%{transform:translate(8px,-5px)}}@media(max-width:720px){.osmosis-cell-response{grid-template-columns:120px 1fr;padding:10px}.osmosis-cell-response svg{width:120px;height:auto}}@media(prefers-reduced-motion:reduce){.cell-process-cargo,.cytoplasm-particle{animation:none}.animal-cell,.plant-membrane,.plant-vacuole{transition:none}}.biology-overview{display:grid;grid-template-columns:repeat(6,1fr);margin-top:-26px;margin-bottom:44px;border:1px solid #cbded0;background:#fff;box-shadow:0 12px 28px rgba(27,68,39,.08)}.biology-overview>div{display:grid;grid-gap:3px;gap:3px;padding:19px 22px;border-right:1px solid #d8e5db}.biology-overview>div:last-child{border-right:0}.biology-overview strong{color:#235f39;font-size:1.35rem}.biology-overview span{color:#69796f;font-size:.68rem}.biology-all-domains a>span{display:grid;grid-gap:2px;gap:2px}.biology-all-domains a strong{font-size:.72rem}.biology-all-domains a small{color:#718078;font-size:.58rem;font-weight:600}.biology-curriculum-browser{padding:52px 0;background:#f2f7f3;border-top:1px solid #d4e2d7;border-bottom:1px solid #d4e2d7}.biology-catalog-heading,.biology-curriculum-browser>div>header{display:flex;align-items:flex-end;justify-content:space-between;gap:28px}.biology-catalog-heading>div>span,.biology-curriculum-browser header>div>span,.biology-domain-resources header>span,.biology-key-concepts header>span,.biology-learning-objectives header>span,.biology-topic-resources header>span,.biology-topic-summary span{color:#287544;font-size:.68rem;font-weight:900}.biology-catalog-heading h2,.biology-curriculum-browser h2{margin:4px 0 6px;font-size:1.45rem}.biology-catalog-heading p,.biology-curriculum-browser header p{max-width:690px;margin:0;color:#63736a;font-size:.72rem;line-height:1.6}.biology-catalog-heading label,.biology-curriculum-browser label{display:flex;align-items:center;gap:9px;width:min(390px,100%);min-height:46px;padding:0 13px;border:1px solid #bcd2c2;background:#fff;color:#276b3e}.biology-catalog-heading input,.biology-curriculum-browser input{width:100%;border:0;outline:0;background:transparent;color:#203f2b;font:inherit;font-size:.7rem}.biology-grade-filter{display:flex;gap:6px;flex-wrap:wrap;margin:22px 0 8px}.biology-grade-filter button{min-width:46px;min-height:40px;padding:0 13px;border:1px solid #bdd2c2;border-radius:5px;background:#fff;color:#2a663c;font-size:.67rem;font-weight:850}.biology-grade-filter button.active{border-color:#287747;background:#287747;color:#fff}.biology-curriculum-browser a:focus-visible,.biology-grade-filter button:focus-visible,.biology-topic-list a:focus-visible{outline:3px solid #e2bd35;outline-offset:2px}.biology-result-count{margin:10px 0;color:#627068;font-size:.64rem}.biology-curriculum-results{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #c9dacd;border-left:1px solid #c9dacd}.biology-curriculum-results>a{position:relative;display:grid;align-content:start;min-height:178px;padding:17px 42px 17px 17px;border-right:1px solid #c9dacd;border-bottom:1px solid #c9dacd;background:#fff;color:#1d472d}.biology-curriculum-results>a:hover{background:#fbfdfb}.biology-curriculum-results>a>span{color:#2b7c49;font-size:.59rem;font-weight:900}.biology-curriculum-results h3{margin:7px 0 6px;font-size:.84rem}.biology-curriculum-results p{margin:0;color:#64736a;font-size:.65rem;line-height:1.55}.biology-curriculum-results small{align-self:end;margin-top:14px;color:#7a867f;font-size:.55rem}.biology-curriculum-results svg{position:absolute;right:14px;top:17px;width:17px;color:#347d4d}.biology-catalog-empty{padding:30px;border:1px solid #cbdccf;background:#fff;text-align:center}.biology-catalog-empty h3{margin:0 0 6px;font-size:.9rem}.biology-catalog-empty p{margin:0;color:#6c7a70;font-size:.7rem}.biology-domain-page,.biology-topic-page{background:#fbfdfb;color:#1d3324}.biology-domain-hero,.biology-topic-hero{padding:44px 0 50px;border-bottom:1px solid color-mix(in srgb,var(--domain-accent) 26%,#d9e3db);background:linear-gradient(100deg,color-mix(in srgb,var(--domain-accent) 11%,#fff),#fff 68%)}.biology-domain-hero .breadcrumbs,.biology-topic-hero .breadcrumbs{display:flex;gap:8px;align-items:center;margin-bottom:22px;color:#607167;font-size:.65rem}.biology-domain-hero .breadcrumbs a,.biology-topic-hero .breadcrumbs a{color:var(--domain-accent);font-weight:800}.biology-domain-hero>div>span,.biology-topic-hero>div>span{display:inline-flex;padding:5px 8px;border-left:3px solid var(--domain-accent);background:#fff;color:var(--domain-accent);font-size:.63rem;font-weight:900}.biology-domain-hero h1,.biology-topic-hero h1{max-width:850px;margin:10px 0 9px;font-size:2.25rem;line-height:1.15}.biology-domain-hero p,.biology-topic-hero p{max-width:760px;margin:0;color:#53655a;font-size:.8rem;line-height:1.75}.biology-domain-hero>a,.biology-topic-hero nav a{display:inline-flex;align-items:center;gap:8px;min-height:43px;margin-top:22px;padding:0 14px;border:1px solid var(--domain-accent);background:var(--domain-accent);color:#fff;font-size:.68rem;font-weight:850}.biology-topic-hero nav{display:flex;gap:8px;flex-wrap:wrap}.biology-topic-hero nav a:nth-child(2){background:#fff;color:var(--domain-accent)}.biology-domain-stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:-22px;margin-bottom:46px;border:1px solid #cfddd2;background:#fff;box-shadow:0 9px 24px rgba(34,68,45,.07)}.biology-domain-stats>div{display:grid;grid-template-columns:auto auto 1fr;align-items:center;grid-gap:10px;gap:10px;padding:15px 20px;border-right:1px solid #dae5dc}.biology-domain-stats>div:last-child{border-right:0}.biology-domain-stats svg{color:var(--domain-accent)}.biology-domain-stats strong{font-size:1.08rem}.biology-domain-stats span{color:#65746b;font-size:.65rem}.biology-domain-catalog{padding-top:12px;padding-bottom:54px}.biology-catalog-heading{align-items:center}.biology-topic-list{border-top:1px solid #cbdccf}.biology-topic-list>a{display:grid;grid-template-columns:54px minmax(0,1fr) 24px;align-items:center;grid-gap:14px;gap:14px;padding:17px 8px;border-bottom:1px solid #cbdccf;color:#203d2a}.biology-topic-list>a:hover{background:#f1f7f2}.biology-topic-list>a>b{display:grid;place-items:center;width:42px;height:42px;border:1px solid color-mix(in srgb,var(--domain-accent) 55%,#fff);color:var(--domain-accent);font-size:.66rem}.biology-topic-list>a>div>span{color:var(--domain-accent);font-size:.55rem;font-weight:900}.biology-topic-list h3{margin:3px 0;font-size:.88rem}.biology-topic-list p{margin:0;color:#617168;font-size:.66rem;line-height:1.5}.biology-topic-list small{display:block;margin-top:6px;color:#7b8780;font-size:.55rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.biology-topic-list svg{color:var(--domain-accent)}.biology-domain-resources{padding:46px 0;background:#edf4ee;border-top:1px solid #d2e1d5;border-bottom:1px solid #d2e1d5}.biology-domain-resources header{margin-bottom:20px}.biology-domain-resources h2,.biology-key-concepts h2,.biology-learning-objectives h2,.biology-topic-resources h2,.biology-topic-summary h2{margin:4px 0 7px;font-size:1.28rem}.biology-domain-resources header p{margin:0;color:#617168;font-size:.7rem}.biology-domain-next{padding-top:32px;padding-bottom:44px}.biology-domain-next a{display:inline-flex;align-items:center;gap:8px;color:var(--domain-accent);font-size:.7rem;font-weight:850}.biology-learning-objectives{display:grid;grid-template-columns:minmax(230px,.7fr) minmax(0,1.3fr);grid-gap:32px;gap:32px;padding-top:48px;padding-bottom:48px}.biology-learning-objectives>div{border-top:1px solid #cadbce}.biology-learning-objectives p{display:flex;align-items:flex-start;gap:10px;margin:0;padding:14px 0;border-bottom:1px solid #cadbce;color:#506359;font-size:.72rem;line-height:1.55}.biology-learning-objectives p svg{flex:0 0 auto;width:18px;color:var(--domain-accent)}.biology-key-concepts{padding:50px 0;background:#f0f5f1;border-top:1px solid #d5e1d7;border-bottom:1px solid #d5e1d7}.biology-key-concepts header{margin-bottom:24px}.biology-key-concepts header p{margin:0;color:#64736a;font-size:.7rem}.biology-key-concepts>div>div{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid #c8d9cc;border-left:1px solid #c8d9cc}.biology-key-concepts article{display:grid;grid-template-columns:46px 1fr;grid-gap:12px;gap:12px;min-height:145px;padding:18px;border-right:1px solid #c8d9cc;border-bottom:1px solid #c8d9cc;background:#fff}.biology-key-concepts article>b{display:grid;place-items:center;width:38px;height:38px;background:color-mix(in srgb,var(--domain-accent) 12%,#fff);color:var(--domain-accent);font-size:.62rem}.biology-key-concepts h3{margin:4px 0 10px;font-size:.85rem}.biology-key-concepts ul{display:flex;gap:6px;flex-wrap:wrap;margin:0;padding:0;list-style:none}.biology-key-concepts li{padding:5px 7px;border:1px solid #cedcd1;background:#f8faf8;color:#5b6b61;font-size:.57rem}.biology-topic-resources{padding-top:48px;padding-bottom:18px}.biology-topic-resources header{margin-bottom:18px}.biology-concept-check{display:grid;grid-template-columns:minmax(250px,.8fr) minmax(0,1.2fr);grid-gap:28px;gap:28px;margin:40px 0;padding:24px;border:1px solid #c9d9cd;border-left:5px solid var(--domain-accent);background:#fff}.biology-concept-check>div:first-child>span{color:var(--domain-accent);font-size:.65rem;font-weight:900}.biology-concept-check h2{margin:5px 0 7px;font-size:1.03rem}.biology-concept-check>div:first-child p{margin:0;color:#68766e;font-size:.67rem}.biology-concept-check>div:nth-child(2){display:grid;grid-gap:7px;gap:7px}.biology-concept-check>div:nth-child(2) button{min-height:44px;padding:8px 12px;border:1px solid #c6d7ca;border-radius:5px;background:#f8fbf8;color:#284b34;text-align:left;font-size:.67rem;font-weight:800}.biology-concept-check>div:nth-child(2) button.correct{border-color:#2b8048;background:#eaf6ed}.biology-concept-check>div:nth-child(2) button.incorrect{border-color:#bd4d4d;background:#fff0ef}.biology-concept-check>p{grid-column:1/-1;display:flex;align-items:center;gap:9px;margin:0;padding:11px;background:#eff7f1;color:#2d6940;font-size:.67rem}.biology-concept-check>p.incorrect{background:#fff1ef;color:#98423f}.biology-concept-check>p svg{flex:0 0 auto;width:18px}.biology-concept-check>p button{display:inline-flex;align-items:center;gap:5px;margin-left:auto;border:0;background:transparent;color:inherit;font-weight:850}.biology-topic-summary{display:grid;grid-template-columns:46px 1fr;grid-gap:16px;gap:16px;margin-top:12px;margin-bottom:40px;padding:22px;border-top:4px solid #d1ad39;background:#fff9e4}.biology-topic-summary>svg{color:#8d7119}.biology-topic-summary p{max-width:800px;margin:0;color:#665f49;font-size:.7rem;line-height:1.65}.biology-topic-navigation{display:grid;grid-template-columns:1fr 1fr;grid-gap:8px;gap:8px;padding-bottom:48px}.biology-topic-navigation>a{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:72px;padding:12px 16px;border:1px solid #c8d9cc;background:#fff;color:#264d33;font-size:.68rem;font-weight:850}.biology-topic-navigation>a:last-child{text-align:right}.biology-topic-navigation span{display:grid}.biology-topic-navigation small{margin-bottom:3px;color:#758078;font-size:.55rem;font-weight:600}.biology-topic-navigation svg{flex:0 0 auto;width:18px;color:var(--domain-accent)}.biology-learning-studio{padding:52px 0 56px;border-top:1px solid #d3dfd6;border-bottom:1px solid #d3dfd6;background:#f4f7f4}.biology-studio-heading{display:grid;grid-template-columns:minmax(260px,.75fr) minmax(0,1.25fr);grid-gap:48px;gap:48px;align-items:end;margin-bottom:22px}.biology-inquiry-panel>header>span,.biology-misconception span,.biology-model-info>span,.biology-studio-heading span,.biology-theory-overview span{color:var(--domain-accent);font-size:.65rem;font-weight:900}.biology-studio-heading h2{margin:5px 0 0;font-size:1.38rem}.biology-studio-heading>p{margin:0;padding-left:18px;border-left:3px solid var(--domain-accent);color:#3f5547;font-size:.82rem;font-weight:750;line-height:1.65}.biology-studio-tabs{display:flex;gap:0;border-bottom:1px solid #bfcfc2}.biology-studio-tabs button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border:0;border-bottom:3px solid transparent;background:transparent;color:#5a6d60;font:inherit;font-size:.7rem;font-weight:850;cursor:pointer}.biology-studio-tabs button svg{width:17px}.biology-studio-tabs button:hover{background:#e9efea;color:#244f32}.biology-studio-tabs button.active{border-bottom-color:var(--domain-accent);background:#fff;color:var(--domain-accent)}.biology-investigation-link:focus-visible,.biology-model-node-list button:focus-visible,.biology-studio-tabs button:focus-visible{outline:3px solid #dfb72f;outline-offset:2px}.biology-inquiry-panel,.biology-model-panel,.biology-theory-panel{background:#fff}.biology-theory-overview{display:grid;grid-template-columns:40px 1fr;grid-gap:15px;gap:15px;padding:24px;border-bottom:1px solid #d4dfd6;background:#eef4ef}.biology-theory-overview>svg{width:25px;color:var(--domain-accent)}.biology-theory-overview p{max-width:940px;margin:4px 0 0;color:#405448;font-size:.77rem;line-height:1.75}.biology-theory-sections article{display:grid;grid-template-columns:48px minmax(0,1fr);grid-gap:18px;gap:18px;padding:25px 24px;border-bottom:1px solid #d8e1da}.biology-theory-sections article:last-child{border-bottom:0}.biology-theory-sections article>b{display:grid;place-items:center;width:42px;height:42px;border:1px solid color-mix(in srgb,var(--domain-accent) 45%,#d7e0d9);color:var(--domain-accent);font-size:.63rem}.biology-theory-sections h3{margin:0 0 7px;font-size:.94rem}.biology-theory-sections p{max-width:950px;margin:0;color:#4e6255;font-size:.73rem;line-height:1.75}.biology-theory-sections ul{display:flex;flex-wrap:wrap;gap:7px;margin:14px 0 0;padding:0;list-style:none}.biology-theory-sections li{padding:6px 8px;border:1px solid #cbd9ce;background:#f7faf7;color:#4f6255;font-size:.6rem}.biology-theory-sections aside{max-width:950px;margin-top:14px;padding:11px 13px;border-left:3px solid #c69a25;background:#fff8df;color:#665923;font-size:.65rem;line-height:1.6}.biology-theory-sections aside strong{display:block;margin-bottom:2px;color:#6e5b17}.biology-model-workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(240px,.55fr);min-height:480px;border-bottom:1px solid #d5dfd7}.biology-model-visual{display:grid;place-items:center;min-width:0;padding:18px;background:#f8fbf9}.biology-model-visual svg{display:block;width:100%;max-height:520px;aspect-ratio:8/5}.biology-model-connections line{stroke:#789985;stroke-width:4;stroke-linecap:round;marker-end:url(#biology-arrow)}#biology-arrow path{fill:#789985}.biology-model-center circle{fill:#e5efe7;stroke:var(--domain-accent);stroke-width:3}.biology-model-center text{fill:#31543c;font-size:20px;font-weight:850;text-anchor:middle}.biology-model-node{cursor:pointer;outline:none}.biology-model-node circle{fill:#fff;stroke:#6f9180;stroke-width:4;transition:fill .18s ease,stroke .18s ease,transform .18s ease}.biology-model-node text{fill:#2d4b37;font-size:22px;font-weight:900;pointer-events:none}.biology-model-node:focus-visible circle,.biology-model-node:hover circle{fill:#edf5ef;stroke:var(--domain-accent);stroke-width:7}.biology-model-node.active circle{fill:var(--domain-accent);stroke:#fff;stroke-width:7}.biology-model-node.active text{fill:#fff}.biology-model-info{display:flex;flex-direction:column;justify-content:center;padding:30px;border-left:1px solid #d5dfd7;background:#fff}.biology-model-info>b{display:grid;place-items:center;width:46px;height:46px;margin:16px 0 14px;background:var(--domain-accent);color:#fff;font-size:.7rem}.biology-model-info h3{margin:0 0 8px;font-size:1.08rem}.biology-model-info p{margin:0;color:#53665a;font-size:.72rem;line-height:1.75}.biology-model-node-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr));grid-gap:0;gap:0;border-left:1px solid #d5dfd7}.biology-model-node-list button{display:grid;grid-template-columns:32px 1fr;align-items:center;grid-gap:8px;gap:8px;min-height:60px;padding:9px 12px;border:0;border-right:1px solid #d5dfd7;border-bottom:1px solid #d5dfd7;background:#fff;color:#385241;text-align:left;font:inherit;font-size:.62rem;font-weight:800;cursor:pointer}.biology-model-node-list button:hover{background:#f0f5f1}.biology-model-node-list button.active{background:color-mix(in srgb,var(--domain-accent) 11%,#fff);color:var(--domain-accent)}.biology-model-node-list button b{display:grid;place-items:center;width:30px;height:30px;border:1px solid #bbcec0;color:inherit}.biology-inquiry-panel{padding:30px}.biology-inquiry-panel>header{max-width:900px}.biology-inquiry-panel>header h3{margin:5px 0 23px;font-size:1.12rem;line-height:1.45}.biology-inquiry-panel ol{display:grid;grid-template-columns:repeat(4,1fr);margin:0;padding:0;border-top:1px solid #cbd8ce;border-left:1px solid #cbd8ce;list-style:none}.biology-inquiry-panel li{display:grid;grid-template-columns:34px 1fr;grid-gap:10px;gap:10px;min-height:160px;padding:16px;border-right:1px solid #cbd8ce;border-bottom:1px solid #cbd8ce}.biology-inquiry-panel li>b{display:grid;place-items:center;width:32px;height:32px;background:color-mix(in srgb,var(--domain-accent) 12%,#fff);color:var(--domain-accent);font-size:.63rem}.biology-inquiry-panel li strong{display:block;margin:5px 0 7px;color:#274c32;font-size:.7rem}.biology-inquiry-panel li p{margin:0;color:#596b60;font-size:.65rem;line-height:1.65}.biology-investigation-link{display:inline-flex;align-items:center;gap:8px;min-height:44px;margin-top:18px;padding:0 14px;background:var(--domain-accent);color:#fff;font-size:.68rem;font-weight:850}.biology-investigation-link svg{width:17px}.biology-misconception{display:grid;grid-template-columns:32px 1fr;grid-gap:13px;gap:13px;margin-top:24px;padding:17px;border-left:4px solid #c35445;background:#fff1ed}.biology-misconception>svg{width:22px;color:#a8463b}.biology-misconception h3{margin:4px 0 6px;color:#743b34;font-size:.8rem}.biology-misconception p{margin:0;color:#6a514d;font-size:.67rem;line-height:1.65}.biology-misconception p strong{color:#854239}@media(max-width:1000px){.biology-curriculum-results,.biology-overview{grid-template-columns:repeat(2,1fr)}.biology-overview>div:nth-child(2){border-right:0}.biology-overview>div:nth-child(-n+2){border-bottom:1px solid #d8e5db}}@media(max-width:720px){.biology-overview{margin-top:-14px;margin-bottom:30px}.biology-overview>div{padding:13px 14px}.biology-overview strong{font-size:1.05rem}.biology-curriculum-browser{padding:38px 0}.biology-catalog-heading,.biology-curriculum-browser>div>header{align-items:stretch;flex-direction:column;gap:16px}.biology-catalog-heading label,.biology-curriculum-browser label{width:100%}.biology-curriculum-results{grid-template-columns:1fr}.biology-curriculum-results>a{min-height:0}.biology-domain-hero,.biology-topic-hero{padding:28px 0 36px}.biology-domain-hero h1,.biology-topic-hero h1{font-size:1.75rem}.biology-domain-hero p,.biology-topic-hero p{font-size:.72rem}.biology-domain-stats{grid-template-columns:1fr;margin-bottom:32px}.biology-domain-stats>div{border-right:0;border-bottom:1px solid #dae5dc}.biology-domain-stats>div:last-child{border-bottom:0}.biology-domain-catalog{padding-bottom:38px}.biology-topic-list>a{grid-template-columns:42px minmax(0,1fr) 18px;gap:9px;padding:14px 0}.biology-topic-list>a>b{width:36px;height:36px}.biology-topic-list p{font-size:.62rem}.biology-learning-objectives{grid-template-columns:1fr;gap:18px;padding-top:36px;padding-bottom:36px}.biology-key-concepts{padding:38px 0}.biology-key-concepts>div>div{grid-template-columns:1fr}.biology-key-concepts article{min-height:0}.biology-concept-check{grid-template-columns:1fr;gap:18px;margin:28px 0;padding:17px}.biology-concept-check>p{align-items:flex-start;flex-wrap:wrap}.biology-concept-check>p button{margin-left:0}.biology-topic-navigation{grid-template-columns:1fr}.biology-topic-navigation>a:last-child{text-align:left}.biology-topic-navigation>a:last-child span{order:2}.biology-topic-navigation>a:last-child svg{order:1}.biology-learning-studio{padding:38px 0}.biology-studio-heading{grid-template-columns:1fr;gap:15px}.biology-studio-heading>p{font-size:.72rem}.biology-studio-tabs{display:grid;grid-template-columns:repeat(3,1fr)}.biology-studio-tabs button{min-width:0;padding:6px;font-size:.58rem;line-height:1.25}.biology-studio-tabs button svg{width:15px}.biology-theory-overview{padding:18px}.biology-theory-sections article{grid-template-columns:38px minmax(0,1fr);gap:11px;padding:20px 16px}.biology-theory-sections article>b{width:34px;height:34px}.biology-theory-sections p{font-size:.69rem}.biology-theory-sections ul{display:grid}.biology-theory-sections li{line-height:1.45}.biology-model-workspace{grid-template-columns:1fr;min-height:0}.biology-model-visual{padding:8px}.biology-model-info{min-height:190px;padding:20px;border-top:1px solid #d5dfd7;border-left:0}.biology-model-info>b{width:38px;height:38px;margin:12px 0}.biology-model-node-list{grid-template-columns:1fr 1fr}.biology-model-node-list button{min-height:58px}.biology-inquiry-panel{padding:20px 16px}.biology-inquiry-panel>header h3{font-size:.92rem}.biology-inquiry-panel ol{grid-template-columns:1fr}.biology-inquiry-panel li{min-height:0}.biology-investigation-link{width:100%;height:auto;min-height:48px;padding:9px 12px;line-height:1.4}.biology-misconception{grid-template-columns:26px 1fr}.biology-misconception h3{font-size:.74rem}}@media(prefers-reduced-motion:reduce){.biology-model-node circle{transition:none}.biology-curriculum-results a,.biology-topic-list a{scroll-behavior:auto}}.cell-experiment{margin:0 18px 18px;border:1px solid #bfd7c6;border-left:5px solid #2b8a4b;background:#f6faf7}.cell-experiment>header{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:20px;border-bottom:1px solid #d6e5da}.cell-experiment>header span{display:flex;align-items:center;gap:7px;color:#24713e;font-size:.7rem;font-weight:900}.cell-experiment>header span svg{width:18px}.cell-experiment h3{margin:5px 0;font-size:1.25rem}.cell-experiment>header p{max-width:720px;margin:4px 0;color:#5c6d61;font-size:.72rem;line-height:1.55}.cell-experiment-presets button,.cell-experiment>header button{display:flex;align-items:center;justify-content:center;gap:6px;min-height:40px;padding:0 11px;border:1px solid #b8d1bf;border-radius:6px;background:#fff;color:#246b3d;font-size:.68rem;font-weight:850;white-space:nowrap}.cell-experiment>header button svg{width:17px}.cell-experiment-presets{display:flex;gap:6px;overflow-x:auto;padding:12px 20px;border-bottom:1px solid #d6e5da}.cell-experiment-presets button:focus-visible,.cell-experiment-presets button:hover{border-color:#2b8a4b;background:#e8f5eb}.cell-experiment-grid{display:grid;grid-template-columns:minmax(320px,.9fr) minmax(360px,1.1fr);grid-gap:22px;gap:22px;padding:20px}.cell-experiment-controls{display:grid;grid-gap:13px;gap:13px}.cell-experiment-controls label{display:grid;grid-gap:5px;gap:5px}.cell-experiment-controls label>span{display:flex;align-items:center;justify-content:space-between;gap:10px}.cell-experiment-controls b{font-size:.7rem}.cell-experiment-controls output{min-width:34px;padding:3px 6px;border-radius:4px;background:#e7f3ea;color:#1f6738;font-size:.7rem;font-weight:900;text-align:center}.cell-experiment-controls input{width:100%;accent-color:#2b8a4b}.cell-experiment-controls small{color:#66776c;font-size:.6rem}.cell-experiment-results{display:grid;align-content:start;grid-gap:12px;gap:12px}.cell-experiment-status{display:flex;align-items:center;gap:10px;padding:12px 14px;border-left:4px solid #2b8a4b;background:#e8f5eb}.cell-experiment-status svg{width:22px;color:#24713e}.cell-experiment-status div{display:grid}.cell-experiment-status small{color:#617169;font-size:.6rem}.cell-experiment-status strong{font-size:.86rem}.cell-experiment-status.strained{border-color:#c08a19;background:#fff5d8}.cell-experiment-status.strained svg{color:#9b6b09}.cell-experiment-status.critical{border-color:#bd4949;background:#fff0ef}.cell-experiment-status.critical svg{color:#a23636}.cell-experiment-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:7px;gap:7px}.cell-experiment-metrics article{display:grid;grid-gap:6px;gap:6px;min-width:0;padding:12px;border:1px solid #d1e1d5;background:#fff}.cell-experiment-metrics article:last-child{grid-column:1/-1}.cell-experiment-metrics span{display:flex;align-items:center;gap:6px;color:#52645a;font-size:.62rem;font-weight:800}.cell-experiment-metrics span svg{flex:0 0 15px;width:15px;color:#2b8a4b}.cell-experiment-metrics strong{font-size:1.15rem}.cell-experiment-metrics strong small{margin-left:2px;color:#77857b;font-size:.55rem}.cell-experiment-metrics article>div{height:5px;background:#e3ebe5}.cell-experiment-metrics article i{display:block;height:100%;background:#2b8a4b;transition:width .22s ease}.cell-experiment-metrics article:last-child i{background:#c15a4f}.cell-experiment-explanation{margin:0;padding:13px;border:1px dashed #a8cab2;background:#fff;color:#405849;font-size:.72rem;line-height:1.55}.cell-experiment-layer{pointer-events:none}.cell-experiment-transport{fill:none;stroke:#2b8a4b;stroke-width:13;stroke-dasharray:8 8;transition:opacity .25s}.cell-experiment-meter>circle{fill:none;stroke:#dfe9e2;stroke-width:8}.cell-experiment-meter>.value{stroke:#df8f34;stroke-linecap:round;stroke-dashoffset:25;transform:rotate(-90deg);transform-origin:center;transition:stroke-dasharray .25s}.cell-experiment-meter.protein>.value{stroke:#4a82b3}.cell-experiment-meter text{fill:#21442d;font-size:12px;font-weight:900;text-anchor:middle;paint-order:stroke;stroke:#fff;stroke-width:4px}.cell-status-chip rect{fill:#e8f5eb;stroke:#2b8a4b;stroke-width:2}.cell-status-chip circle{fill:#2b8a4b}.cell-status-chip text{fill:#21442d;font-size:13px;font-weight:850}.cell-status-chip.strained rect{fill:#fff5d8;stroke:#b98417}.cell-status-chip.strained circle{fill:#b98417}.cell-status-chip.critical rect{fill:#fff0ef;stroke:#b84545}.cell-status-chip.critical circle{fill:#b84545}.experiment-critical .cell-body{animation:cell-stress-pulse 1.2s ease-in-out infinite}.experiment-strained .cell-body{animation:cell-stress-pulse 2s ease-in-out infinite}@keyframes cell-stress-pulse{50%{stroke-width:8;filter:saturate(.8)}}@media(max-width:900px){.cell-experiment-grid{grid-template-columns:1fr}.cell-experiment-results{grid-row:1}.cell-experiment>header{flex-direction:column}}@media(max-width:720px){.cell-experiment{margin:0 12px 12px}.cell-experiment-grid{padding:14px}.cell-experiment-presets{padding:10px 14px}.cell-experiment-metrics{grid-template-columns:1fr}.cell-experiment-metrics article:last-child{grid-column:auto}.cell-experiment>header{padding:16px}.cell-experiment>header button{width:100%}}@media(prefers-reduced-motion:reduce){.experiment-critical .cell-body,.experiment-strained .cell-body{animation:none}.cell-experiment-meter>.value,.cell-experiment-metrics article i{transition:none}}.membrane-v3{--membrane-green:#267441;--membrane-border:#c7d9cb;--membrane-focus:#f0c83f}.membrane-accessibility-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 18px;border-bottom:1px solid #d7e4da;background:#fff}.membrane-accessibility-toolbar>div{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.membrane-accessibility-toolbar button{display:flex;align-items:center;justify-content:center;gap:6px;min-height:38px;padding:0 10px;border:1px solid var(--membrane-border);border-radius:6px;background:#fff;color:#315f3e;font-size:.62rem;font-weight:850}.membrane-accessibility-toolbar button svg{width:16px;height:16px}.learning-levels button.active,.membrane-accessibility-toolbar button[aria-pressed=true]{border-color:var(--membrane-green);background:#e8f5eb;color:#1d6335}.learning-levels{padding:3px;background:#f0f5f1}.learning-levels button{border-color:transparent}.membrane-v3 .transport-stage>header small{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.membrane-v3 .membrane-canvas{cursor:crosshair}.membrane-canvas-wrap.is-high-contrast .membrane-canvas{border:3px solid #111;filter:contrast(1.16)}.pump-cycle-v3{grid-template-columns:28px minmax(190px,1fr) auto auto;padding:12px 14px}.pump-cycle-v3>div{display:grid;grid-gap:2px;gap:2px}.pump-cycle-v3>div span{color:#7b6725;font-size:.55rem;font-weight:800}.pump-cycle-v3>div strong{font-size:.68rem}.pump-cycle-v3 ol{display:flex;gap:4px;margin:0;padding:0;list-style:none}.pump-cycle-v3 li{display:grid;place-items:center;width:24px;height:24px;border:1px solid #9c8131;border-radius:50%;background:#fff;color:#715d1e;font-size:.58rem;font-weight:900}.pump-cycle-v3 li.active{background:#e4b62c;color:#332a0c;box-shadow:0 0 0 3px rgba(228,182,44,.22)}.pump-cycle-v3>small{font-size:.56rem;white-space:nowrap}.v3-measurements{grid-template-columns:repeat(6,minmax(0,1fr))}.v3-measurements article:last-child{border-right:0}.protein-palette-v3>div{grid-template-columns:minmax(0,1fr) 34px 34px 25px 34px;padding:3px;border:1px solid transparent}.protein-palette-v3>div.selected{border-color:#2b8a4b;background:#edf7ef}.protein-palette-v3>div>button:first-child{border:0;background:transparent}.protein-palette-v3 .protein-toggle svg,.protein-palette-v3 button svg{width:14px}.protein-palette-v3 .protein-toggle[aria-pressed=false]{color:#963d45;background:#fff1f1}.gate-inspector{display:grid;grid-gap:10px;gap:10px;margin-top:12px;padding:12px;border:1px solid #b9d3c0;border-left:4px solid #2b8a4b;background:#f3f8f4}.gate-inspector header{display:flex;align-items:center;justify-content:space-between;gap:8px}.gate-inspector header span{font-size:.66rem;font-weight:900}.gate-inspector header strong{padding:4px 7px;border-radius:4px;font-size:.58rem}.gate-inspector header strong.open{background:#dff1e4;color:#1c6b37}.gate-inspector header strong.closed{background:#f8e1e2;color:#913843}.gate-inspector label{display:grid;grid-gap:5px;gap:5px;color:#52645a;font-size:.6rem}.gate-inspector select{width:100%;min-height:38px;border:1px solid #bfd3c4;background:#fff;color:#294f36}.gate-inspector input[type=range]{width:100%;accent-color:#2b8a4b}.gate-inspector .ligand-toggle{grid-template-columns:auto 1fr;align-items:center;min-height:38px}.gate-inspector input[type=checkbox]{width:18px;height:18px;accent-color:#2b8a4b}.graph-actions{display:flex;align-items:center;justify-content:flex-end;gap:5px;flex-wrap:wrap}.graph-actions select{min-height:38px;max-width:190px;border:1px solid #c5d9ca;background:#fff;color:#276c3d;font-size:.62rem;font-weight:800}.graph-actions button{padding:0 9px}.predict-workflow>p.correct{border-left:4px solid #2b8a4b}.predict-workflow>p.incorrect{border-left:4px solid #b96b20;background:#fff4de;color:#644d1e}.membrane-v3 .concentration-graph{height:205px}.membrane-v3 .concentration-graph line{stroke-dasharray:3 5}.membrane-v3 .concentration-graph polyline{stroke-linecap:round;stroke-linejoin:round}.membrane-v3 button:focus-visible,.membrane-v3 input:focus-visible,.membrane-v3 select:focus-visible{outline:3px solid var(--membrane-focus);outline-offset:2px}@media(max-width:1100px){.v3-measurements{grid-template-columns:repeat(3,1fr)}.v3-measurements article:nth-child(n+4){border-top:1px solid #d9e7dd}.pump-cycle-v3{grid-template-columns:28px 1fr}.pump-cycle-v3 ol,.pump-cycle-v3>small{grid-column:1/-1}.membrane-accessibility-toolbar{align-items:flex-start;flex-direction:column}}@media(max-width:720px){.membrane-v3{margin-left:-12px;margin-right:-12px;border-right:0;border-left:0}.membrane-accessibility-toolbar{padding:10px 12px}.membrane-accessibility-toolbar>div{width:100%}.learning-levels{display:grid!important;grid-template-columns:repeat(3,1fr)}.learning-levels button{min-width:0;padding:0 5px}.membrane-accessibility-toolbar>div:last-child{display:grid;grid-template-columns:repeat(4,1fr)}.membrane-accessibility-toolbar>div:last-child button{min-width:0;padding:0 4px}.membrane-accessibility-toolbar>div:last-child button span{font-size:.54rem;overflow-wrap:anywhere}.membrane-v3 .v2-stage{padding:10px}.membrane-v3 .transport-stage>header{display:grid;min-height:0;padding-bottom:8px}.membrane-v3 .transport-stage>header small{white-space:normal}.membrane-v3 .membrane-canvas{height:315px}.canvas-status{right:8px;left:8px;max-width:none;font-size:.54rem}.v3-measurements{grid-template-columns:repeat(2,1fr)}.v3-measurements article:nth-child(n+3){border-top:1px solid #d9e7dd}.membrane-v3-workspace{display:flex;flex-direction:column}.membrane-v3 .v2-controls{order:1;padding:16px}.membrane-v3 .transport-analysis{order:2;padding:16px}.protein-palette-v3>div{grid-template-columns:minmax(0,1fr) 38px 38px 24px 38px}.protein-palette-v3 button{min-height:38px}.graph-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}.graph-actions select{grid-column:1/-1;max-width:none}.transport-analysis>header{display:grid}.membrane-v3 .concentration-graph{height:145px}.pump-cycle-v3{grid-template-columns:24px minmax(0,1fr);padding:10px}.pump-cycle-v3 ol{display:grid;grid-template-columns:repeat(7,1fr);width:100%}.pump-cycle-v3 li{width:100%;height:25px;border-radius:4px}.osmosis-cell-response{grid-template-columns:105px minmax(0,1fr)}.osmosis-cell-response svg{width:105px}.membrane-v3 .membrane-sim-footer{padding-bottom:20px}.membrane-v3 .bio-playback button{min-width:42px;padding:0 7px}.membrane-v3 .bio-playback button span{display:none}}@media(prefers-reduced-motion:reduce){.membrane-canvas,.pump-cycle-v3 li{transition:none}}.biology-lab-page{max-width:1440px;padding-top:34px}.bio-lab-runtime{--lab-green:#247747;--lab-teal:#177f84;--lab-blue:#2f6db2;--lab-gold:#d39a1d;--lab-coral:#c95f50;overflow:hidden;border:1px solid #b9d1c0;border-top:6px solid var(--lab-green);border-radius:8px;background:#fff;box-shadow:0 18px 44px rgba(30,65,43,.1);color:#1d3425}.bio-lab-header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:24px 28px;border-bottom:1px solid #d4e1d7;background:#f5faf6}.bio-lab-header>div:first-child{max-width:860px}.bio-lab-header>div:first-child>span{display:flex;align-items:center;gap:7px;color:var(--lab-green);font-size:.75rem;font-weight:900}.bio-lab-header h1{margin:7px 0 8px;font-size:2rem;line-height:1.2}.bio-lab-header p{margin:0;color:#53665a;font-size:.88rem;line-height:1.65}.bio-lab-accessibility{display:flex;gap:6px}.bio-lab-accessibility button{display:flex;align-items:center;gap:7px;min-height:42px;padding:0 11px;border:1px solid #bdd3c3;border-radius:6px;background:#fff;color:#315c3e;font-size:.68rem;font-weight:850}.bio-lab-accessibility button[aria-pressed=true]{border-color:var(--lab-green);background:#e5f3e8;color:#195e34}.bio-lab-progress{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;grid-gap:14px;gap:14px;padding:10px 28px;border-bottom:1px solid #d7e2d9}.bio-lab-progress>div{height:8px;background:#e3ebe5}.bio-lab-progress>div span{display:block;height:100%;background:linear-gradient(90deg,var(--lab-green),var(--lab-teal));transition:width .25s ease}.bio-lab-progress strong{color:#4f6557;font-size:.68rem}.bio-lab-workspace{display:grid;grid-template-columns:255px minmax(0,1fr);min-height:680px}.bio-lab-stage-nav{border-right:1px solid #d4e1d7;background:#f7faf8}.bio-lab-stage-nav button{display:grid;grid-template-columns:34px minmax(0,1fr);align-items:center;grid-gap:10px;gap:10px;width:100%;min-height:76px;padding:12px 15px;border:0;border-bottom:1px solid #d9e4dc;background:transparent;color:#4b6052;text-align:left}.bio-lab-stage-nav button:hover:not(:disabled){background:#eef5f0}.bio-lab-stage-nav button.active{box-shadow:inset 4px 0 var(--lab-green);background:#fff;color:#1f6237}.bio-lab-stage-nav button.completed>span:first-child{border-color:var(--lab-green);background:var(--lab-green);color:#fff}.bio-lab-stage-nav button:disabled{cursor:not-allowed;opacity:.48}.bio-lab-stage-nav button>span:first-child{display:grid;place-items:center;width:32px;height:32px;border:1px solid #b8cdbd;border-radius:50%;background:#fff;color:#356746}.bio-lab-stage-nav button>span:last-child{display:grid;grid-gap:3px;gap:3px;min-width:0}.bio-lab-stage-nav strong{font-size:.72rem}.bio-lab-stage-nav small{color:#728078;font-size:.59rem;line-height:1.35}.bio-lab-stage{min-width:0;background:#fff}.bio-lab-live{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.bio-lab-section>header{padding:28px 30px 22px;border-bottom:1px solid #d8e4da}.bio-lab-section>header>span{color:var(--lab-green);font-size:.68rem;font-weight:900}.bio-lab-section>header h2{margin:5px 0 7px;font-size:1.35rem}.bio-lab-section>header p{max-width:900px;margin:0;color:#5d6e63;font-size:.78rem;line-height:1.65}.lab-question-band{display:grid;grid-template-columns:38px 1fr;grid-gap:12px;gap:12px;margin:24px 30px 16px;padding:16px;border-left:5px solid var(--lab-gold);background:#fff7dd;color:#5e4d17}.lab-question-band>svg{color:#a37410}.lab-question-band>div{display:grid;grid-gap:3px;gap:3px}.lab-question-band strong{font-size:.84rem}.lab-question-band span{font-size:.69rem;line-height:1.5}.lab-choice-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:8px;gap:8px;margin:0;padding:0 30px 24px;border:0}.lab-choice-grid legend{width:100%;margin-bottom:10px;color:#405448;font-size:.72rem;font-weight:800}.lab-choice-grid label{min-height:98px;border:1px solid #c5d8ca;border-radius:7px;background:#fff;cursor:pointer}.lab-choice-grid label:hover{border-color:var(--lab-teal);background:#f1f8f8}.lab-choice-grid label.selected{border:2px solid var(--lab-teal);background:#e9f5f5}.lab-choice-grid input{position:absolute;opacity:0;pointer-events:none}.lab-choice-grid label>span{display:grid;grid-template-columns:28px 1fr;align-items:center;grid-gap:8px;gap:8px;height:100%;padding:14px;color:#274b34}.lab-choice-grid svg{color:var(--lab-blue)}.lab-choice-grid strong{font-size:.72rem;line-height:1.5}.lab-concept-row{display:grid;grid-template-columns:repeat(2,1fr);margin:0 30px;border-top:1px solid #cfddd2;border-left:1px solid #cfddd2}.lab-concept-row>div{display:grid;grid-gap:5px;gap:5px;padding:15px;border-right:1px solid #cfddd2;border-bottom:1px solid #cfddd2}.lab-concept-row span{color:#68776e;font-size:.62rem}.lab-concept-row strong{font-size:.76rem}.bio-lab-actions{display:flex;justify-content:flex-end;gap:8px;padding:22px 30px;border-top:1px solid #d8e4da}.bio-lab-actions.split{align-items:center;justify-content:space-between}.lab-primary-action,.lab-secondary-action{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 15px;border:1px solid var(--lab-green);border-radius:6px;background:var(--lab-green);color:#fff;font-size:.72rem;font-weight:900}.lab-secondary-action{border-color:#b8cec0;background:#fff;color:#285c38}.lab-primary-action:disabled{cursor:not-allowed;opacity:.45}.lab-design-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(240px,.65fr);grid-gap:16px;gap:16px;padding:24px 30px}.lab-variable-panel{border:1px solid #cbdacf}.lab-variable-panel label{display:grid;grid-template-columns:minmax(150px,1fr) auto;align-items:center;grid-gap:8px;gap:8px;padding:15px;border-bottom:1px solid #d7e2da}.lab-variable-panel label:last-child{border-bottom:0}.lab-variable-panel label>span{display:grid;grid-gap:3px;gap:3px}.lab-variable-panel label strong{font-size:.72rem}.lab-variable-panel label small{color:#718078;font-size:.59rem}.lab-variable-panel output{min-width:92px;padding:6px 8px;border-radius:5px;background:#e8f3ec;color:#1e6a3a;font-size:.68rem;font-weight:900;text-align:center}.lab-variable-panel input{grid-column:1/-1;width:100%;accent-color:var(--lab-green)}.lab-control-panel{display:grid;align-content:center;justify-items:start;padding:22px;border:1px solid #dfc46e;border-top:5px solid var(--lab-gold);background:#fff9e7}.lab-control-panel svg{color:#9d7212}.lab-control-panel span{margin-top:15px;color:#79611f;font-size:.63rem;font-weight:900}.lab-control-panel strong{margin:3px 0;font-size:1.5rem}.lab-control-panel p{margin:5px 0 0;color:#665d42;font-size:.68rem;line-height:1.6}.lab-protocol{display:grid;grid-template-columns:repeat(4,1fr);margin:0 30px 24px;padding:0;border-top:1px solid #cbdacf;border-left:1px solid #cbdacf;list-style:none}.lab-protocol li{display:grid;grid-template-columns:32px 1fr;grid-gap:9px;gap:9px;min-height:112px;padding:14px;border-right:1px solid #cbdacf;border-bottom:1px solid #cbdacf}.lab-protocol li>span{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--lab-blue);color:#fff;font-size:.68rem;font-weight:900}.lab-protocol li>div{display:grid;align-content:start;grid-gap:5px;gap:5px}.lab-protocol strong{font-size:.69rem}.lab-protocol small{color:#65756b;font-size:.59rem;line-height:1.5}.osmosis-experiment-layout{display:grid;grid-template-columns:240px minmax(0,1fr);border-bottom:1px solid #cbdacf}.experiment-setup-controls{display:grid;align-content:start;grid-gap:14px;gap:14px;padding:20px;border-right:1px solid #cbdacf;background:#f6f9f7}.experiment-setup-controls>div:first-child{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:1px solid #d4e1d7}.experiment-setup-controls span{color:#586c5f;font-size:.65rem;font-weight:800}.experiment-setup-controls strong{font-size:.78rem}.experiment-setup-controls label{display:grid;grid-gap:6px;gap:6px}.experiment-setup-controls select{width:100%;min-height:42px;padding:0 9px;border:1px solid #bcd1c2;border-radius:5px;background:#fff;color:#284b34;font-size:.7rem}.experiment-setup-controls select:disabled{opacity:.62}.experiment-condition{display:grid!important;grid-gap:5px;gap:5px;padding:12px;border-left:4px solid var(--lab-teal);background:#e9f5f5}.experiment-condition strong{color:#1d696d;font-size:.7rem;line-height:1.45}.experiment-setup-controls>small{color:#6a786f;font-size:.61rem;line-height:1.5}.osmosis-apparatus{min-width:0;background:#f5fafb}.osmosis-apparatus svg{display:block;width:100%;height:auto;aspect-ratio:19/11}.apparatus-wall{fill:#eef7f8}.apparatus-bench{fill:#d8c6a4}.digital-scale>path:first-child{fill:#49636a}.digital-scale rect{fill:#17272a}.digital-scale text{fill:#d6fff0;font-size:20px;font-weight:900}.digital-scale .scale-platform{fill:#6b858a}.apparatus-label{fill:#3f5a52!important;font-size:13px!important;font-weight:800!important}.beaker-glass{fill:rgba(255,255,255,.3);stroke:#527d8a;stroke-width:7}.beaker-rim{fill:none;stroke:#527d8a;stroke-width:9;stroke-linecap:round}.beaker-solution{opacity:.74}.solution-surface{fill:none;stroke:#2a8192;stroke-width:4}.beaker-mark{fill:none;stroke:#527d8a;stroke-width:3}.solute-particle circle{fill:#e7ad2f;stroke:#745d22;stroke-width:2}.solute-particle text{fill:#513e12;font-size:10px;font-weight:900}.egg-specimen{transition:transform .55s ease}.egg-specimen>path:first-child{fill:#f0b968;stroke:#805c2b;stroke-width:5}.egg-membrane{fill:#f6dca9;stroke:#ae7936;stroke-width:3}.egg-center{fill:#d88f4b;opacity:.75}.egg-specimen text{fill:#5d3d1c;font-size:11px;font-weight:900}.osmosis-flow{fill:none;stroke:#1f7fa7;stroke-width:6;stroke-linecap:round;stroke-dasharray:9 7;animation:osmosis-flow 1s linear infinite}.apparatus-timer rect:first-child{fill:#fff;stroke:#2e7962;stroke-width:2}.apparatus-timer rect:nth-child(2){fill:#58aa82}.apparatus-timer text{fill:#224b38;font-size:13px;font-weight:900}.apparatus-caption{display:grid;grid-template-columns:14px minmax(0,1fr);grid-gap:3px 8px;gap:3px 8px;padding:12px 18px;border-top:1px solid #c7dadd;background:#fff}.apparatus-caption .direction-dot{grid-row:1/3;width:12px;height:12px;margin-top:4px;border-radius:50%;background:var(--lab-blue)}.apparatus-caption .direction-dot.balanced{background:var(--lab-gold)}.apparatus-caption strong{font-size:.72rem}.apparatus-caption small{color:#67776d;font-size:.6rem}.experiment-action-strip{display:flex;justify-content:center;gap:8px;min-height:74px;padding:14px 20px;border-bottom:1px solid #cbdacf;background:#f7faf8}.experiment-action-strip button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 14px;border:1px solid var(--lab-green);border-radius:6px;background:var(--lab-green);color:#fff;font-size:.7rem;font-weight:900}.experiment-action-strip button.secondary{border-color:#b9cec0;background:#fff;color:#285c38}.experiment-action-strip button:disabled{opacity:.65}.trial-result{display:grid;grid-template-columns:28px 1fr;grid-gap:10px;gap:10px;margin:18px 30px;padding:14px;border-left:5px solid var(--lab-green);background:#ebf7ee;color:#28563a}.trial-result.differs{border-color:var(--lab-gold);background:#fff8e5;color:#66531c}.trial-result>div{display:grid;grid-gap:3px;gap:3px}.trial-result strong{font-size:.82rem}.trial-result span{font-size:.67rem}@keyframes osmosis-flow{to{stroke-dashoffset:-32}}.lab-data-summary{display:grid;grid-template-columns:repeat(4,1fr);margin:24px 30px 16px;border-top:1px solid #cbdacf;border-left:1px solid #cbdacf}.lab-data-summary>div{display:grid;grid-gap:5px;gap:5px;padding:14px;border-right:1px solid #cbdacf;border-bottom:1px solid #cbdacf}.lab-data-summary span{color:#64746a;font-size:.6rem}.lab-data-summary strong{font-size:1rem}.lab-data-guidance{display:grid;grid-template-columns:28px minmax(0,1fr) auto;align-items:center;grid-gap:10px;gap:10px;margin:0 30px 16px;padding:12px;border-left:5px solid var(--lab-gold);background:#fff7df;color:#65521a}.lab-data-guidance span{font-size:.67rem;line-height:1.5}.lab-data-guidance button{min-height:38px;padding:0 10px;border:1px solid #c59b30;border-radius:5px;background:#fff;color:#6a5215;font-size:.65rem;font-weight:850}.osmosis-chart{margin:16px 30px;padding:16px;border:1px solid #c9dacf;background:#fbfdfb}.osmosis-chart figcaption{display:grid;grid-gap:3px;gap:3px}.osmosis-chart figcaption strong{font-size:.78rem}.osmosis-chart figcaption span{color:#69786e;font-size:.61rem}.osmosis-chart svg{display:block;width:100%;height:auto;max-height:360px;margin-top:8px}.osmosis-chart text{fill:#5e6d63;font-size:11px}.osmosis-chart .grid-line{stroke:#d9e3dc;stroke-dasharray:3 5}.osmosis-chart .zero-line{stroke:#7d8e82;stroke-width:2}.osmosis-chart .axis-line,.osmosis-chart .tick-line{stroke:#4b6252;stroke-width:2}.osmosis-chart .average-line{fill:none;stroke:var(--lab-teal);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.osmosis-chart .trial-point{fill:#f0b43c;stroke:#755614;stroke-width:2}.osmosis-chart .average-point{fill:#fff;stroke:var(--lab-teal);stroke-width:4}.osmosis-chart .axis-title{fill:#354b3b;font-size:12px;font-weight:800}.lab-table-wrap{margin:16px 30px 24px;overflow-x:auto;border:1px solid #c9dacf}.lab-table-wrap table{width:100%;min-width:760px;border-collapse:collapse}.lab-table-wrap caption{padding:11px 13px;background:#eef5f0;color:#31533b;text-align:left;font-size:.7rem;font-weight:900}.lab-table-wrap td,.lab-table-wrap th{padding:10px 12px;border-top:1px solid #d5e1d8;text-align:left;font-size:.64rem;white-space:nowrap}.lab-table-wrap th{background:#f8faf8;color:#53645a}.lab-table-wrap td.positive{color:#177343;font-weight:900}.lab-table-wrap td.negative{color:#a3443b;font-weight:900}.lab-table-wrap td button{display:grid;place-items:center;width:34px;height:34px;border:1px solid #d7c8c5;border-radius:5px;background:#fff;color:#a3443b}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.cer-editor{display:grid;grid-gap:0;gap:0;margin:24px 30px;border-top:1px solid #cbdacf}.cer-editor label{display:grid;grid-template-columns:220px minmax(0,1fr);grid-gap:18px;gap:18px;padding:16px 0;border-bottom:1px solid #cbdacf}.cer-editor label>span{display:grid;align-content:start;grid-gap:4px;gap:4px}.cer-editor strong{font-size:.76rem}.cer-editor small{color:#68776e;font-size:.61rem;line-height:1.5}.cer-editor textarea{width:100%;resize:vertical;padding:11px;border:1px solid #bcd0c1;border-radius:5px;background:#fff;color:#253b2b;font-size:.72rem;line-height:1.6}.report-feedback{display:flex;align-items:flex-start;gap:9px;margin:0 30px 20px;padding:13px;border-left:5px solid var(--lab-gold);background:#fff7df;color:#66531c;font-size:.68rem;line-height:1.5}.report-feedback.complete{border-color:var(--lab-green);background:#eaf6ed;color:#285c39}.lab-connection-note{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;grid-gap:12px;gap:12px;margin:0 30px 24px;padding:16px;border:1px solid #bcd3d5;background:#edf7f8;color:#26555a}.lab-connection-note>div{display:grid;grid-gap:3px;gap:3px}.lab-connection-note strong{font-size:.75rem}.lab-connection-note span{font-size:.63rem;line-height:1.45}.lab-connection-note a{display:flex;align-items:center;gap:6px;font-size:.66rem;font-weight:900}.local-save-note{display:flex;align-items:center;gap:7px;color:#5f7065;font-size:.63rem}.biology-lab-followup{display:grid;grid-template-columns:34px 1fr;grid-gap:12px;gap:12px;margin-top:18px;padding:16px;border-left:5px solid #2b8a4b;background:#eef6f0}.biology-lab-followup>div{display:grid;grid-gap:4px;gap:4px}.biology-lab-followup strong{font-size:.75rem}.biology-lab-followup span{color:#5e6e63;font-size:.67rem;line-height:1.55}.bio-lab-runtime a:focus-visible,.bio-lab-runtime button:focus-visible,.bio-lab-runtime input:focus-visible,.bio-lab-runtime select:focus-visible,.bio-lab-runtime textarea:focus-visible{outline:3px solid #e6bb2d;outline-offset:2px}.bio-lab-runtime.is-high-contrast{--lab-green:#075f24;--lab-teal:#005b65;border-color:#111;color:#050505}.bio-lab-runtime.is-high-contrast .bio-lab-header,.bio-lab-runtime.is-high-contrast .bio-lab-stage-nav,.bio-lab-runtime.is-high-contrast .experiment-setup-controls{background:#fff}.bio-lab-runtime.is-high-contrast .bio-lab-stage-nav button,.bio-lab-runtime.is-high-contrast input,.bio-lab-runtime.is-high-contrast select,.bio-lab-runtime.is-high-contrast textarea{border-color:#111}.bio-lab-runtime.is-reduced-motion *{scroll-behavior:auto!important;animation:none!important;transition:none!important}@media(max-width:1050px){.bio-lab-workspace{grid-template-columns:210px minmax(0,1fr)}.lab-protocol{grid-template-columns:repeat(2,1fr)}.osmosis-experiment-layout{grid-template-columns:210px minmax(0,1fr)}.lab-choice-grid{grid-template-columns:1fr}.lab-choice-grid label{min-height:70px}.lab-data-summary{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.biology-lab-page{padding-right:10px;padding-left:10px}.bio-lab-header{display:grid;padding:18px}.bio-lab-header h1{font-size:1.5rem}.bio-lab-header p{font-size:.78rem}.bio-lab-accessibility{width:100%}.bio-lab-accessibility button{flex:1 1}.bio-lab-progress{padding:9px 14px}.bio-lab-workspace{display:block;min-height:0}.bio-lab-stage-nav{display:flex;overflow-x:auto;border-right:0;border-bottom:1px solid #cbdacf}.bio-lab-stage-nav button{flex:0 0 148px;grid-template-columns:28px minmax(0,1fr);min-height:68px;padding:9px}.bio-lab-stage-nav button.active{box-shadow:inset 0 -4px var(--lab-green)}.bio-lab-stage-nav button>span:first-child{width:28px;height:28px}.bio-lab-stage-nav small{display:none}.bio-lab-section>header{padding:20px 16px 16px}.bio-lab-section>header h2{font-size:1.1rem}.cer-editor,.lab-concept-row,.lab-connection-note,.lab-data-guidance,.lab-data-summary,.lab-protocol,.lab-question-band,.lab-table-wrap,.osmosis-chart,.report-feedback,.trial-result{margin-right:16px;margin-left:16px}.lab-choice-grid{padding-right:16px;padding-left:16px}.lab-concept-row{grid-template-columns:1fr}.bio-lab-actions{flex-direction:column;padding:16px}.bio-lab-actions,.bio-lab-actions.split{align-items:stretch}.lab-primary-action,.lab-secondary-action{width:100%;min-height:48px}.lab-design-grid{grid-template-columns:1fr;padding:18px 16px}.lab-variable-panel label{grid-template-columns:minmax(0,1fr) auto}.lab-protocol{grid-template-columns:1fr}.lab-protocol li{min-height:0}.osmosis-experiment-layout{display:flex;flex-direction:column}.experiment-setup-controls{display:grid;grid-template-columns:1fr 1fr;border-right:0;border-bottom:1px solid #cbdacf}.experiment-setup-controls .experiment-condition,.experiment-setup-controls>div:first-child,.experiment-setup-controls>small{grid-column:1/-1}.osmosis-apparatus svg{aspect-ratio:19/13}.experiment-action-strip{align-items:stretch;flex-direction:column}.experiment-action-strip button{width:100%;min-height:48px}.lab-data-guidance{grid-template-columns:24px 1fr}.lab-data-guidance button{grid-column:1/-1}.osmosis-chart{padding:8px}.cer-editor label{grid-template-columns:1fr;gap:8px}.lab-connection-note{grid-template-columns:28px 1fr}.lab-connection-note a{grid-column:1/-1}.local-save-note{justify-content:center;text-align:center}.biology-lab-followup{margin-right:4px;margin-left:4px}}@media(prefers-reduced-motion:reduce){.bio-lab-runtime *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}.scientific-asset-credit{margin-top:12px;border-top:1px solid #d8e2dc;color:#41584f;font-size:.78rem}.scientific-asset-credit summary{min-height:44px;padding:12px 0;cursor:pointer;font-weight:800}.scientific-asset-credit>div{padding:0 0 14px}.scientific-asset-credit p{margin:4px 0;line-height:1.55}.scientific-asset-credit dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:8px;gap:8px;margin:12px 0 0}.scientific-asset-credit dl>div{padding:10px;background:#f5f8f6}.scientific-asset-credit dt{color:#667970;font-size:.68rem}.scientific-asset-credit dd{margin:3px 0 0}.scientific-asset-credit a{color:#236346;text-decoration:underline;text-underline-offset:2px}@media(max-width:620px){.scientific-asset-credit dl{grid-template-columns:1fr}}.natural-selection-sim .selection-habitat{display:block;position:relative;min-height:360px}.selection-agent{position:absolute!important;z-index:1;display:block!important;width:24px;height:20px;transform:translate(-50%,-50%);transition:left .42s ease,top .42s ease,opacity .3s ease}.selection-agent svg{display:block;width:100%!important;height:100%!important;filter:drop-shadow(0 1px 1px rgba(0,0,0,.25))}.selection-agent path{fill:#eadcc3;stroke:#5f5545;stroke-width:1.2}.selection-agent.dark path{fill:#26352c;stroke:#102018}.selection-agent .selection-agent-body{fill:#8a7657}.selection-agent.dark .selection-agent-body{fill:#111b16}.selection-agent .selection-agent-vein{fill:none;stroke:#7e6e56;stroke-width:.8}.selection-agent.dark .selection-agent-vein{stroke:#899a8f}.selection-inputs select{width:100%;min-height:44px;padding:0 10px;border:1px solid #b9d0bf;border-radius:5px;background:#fff;color:#274a34}.selection-transition{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid #d9e6dc;background:#f7faf8}.selection-transition>div{display:grid;grid-gap:3px;gap:3px;padding:14px 16px;border-right:1px solid #d9e6dc}.selection-transition span{color:#5e7166;font-size:.68rem}.selection-transition strong{color:#1f5e36;font-size:1.05rem}.selection-transition small{color:#718077;font-size:.58rem;line-height:1.45}.selection-transition .selection-lineage{grid-column:1/-1;display:flex;align-items:center;gap:8px;border-top:1px solid #d9e6dc;border-right:0;background:#edf6f0}.selection-transition .selection-lineage svg{flex:0 0 auto;color:#2b8a4b}.selection-transition .selection-lineage strong{font-size:.74rem}.natural-selection-sim .selection-results{grid-template-columns:repeat(4,minmax(0,1fr))}.natural-selection-sim .selection-results>div:last-child{grid-column:1/-1;border-top:1px solid #d9e6dc}.natural-selection-sim .selection-graph{height:96px}.natural-selection-sim.is-reduced-motion .selection-agent{transition:none}@media(max-width:720px){.selection-agent{width:20px;height:17px}.selection-transition{grid-template-columns:1fr 1fr}.selection-transition>div:nth-child(2n){border-right:0}.selection-transition .selection-lineage{grid-column:1/-1}.natural-selection-sim .selection-results{grid-template-columns:1fr 1fr}.natural-selection-sim .selection-results>article{border-top:1px solid #d9e6dc}.natural-selection-sim .selection-habitat{min-height:330px}}.mitosis-conclusion-stage,.mitosis-data-stage,.mitosis-design-stage,.mitosis-experiment-stage,.mitosis-question-stage{padding:26px 30px}.bio-lab-stage-heading{display:grid;grid-gap:5px;gap:5px;margin-bottom:22px}.bio-lab-stage-heading.compact{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.bio-lab-stage-heading>div>span,.bio-lab-stage-heading>span{color:var(--lab-green);font-size:.68rem;font-weight:900}.bio-lab-stage-heading h2{margin:0;font-size:1.3rem}.bio-lab-stage-heading p{max-width:900px;margin:0;color:#5d6e63;font-size:.72rem;line-height:1.6}.bio-lab-primary,.bio-lab-secondary{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:0 14px;border:1px solid var(--lab-green);border-radius:6px;background:var(--lab-green);color:#fff;font-size:.7rem;font-weight:900}.bio-lab-secondary{border-color:#b9cfc0;background:#fff;color:#285c38}.bio-lab-primary:disabled,.bio-lab-secondary:disabled{cursor:not-allowed;opacity:.5}.bio-lab-choice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:9px;gap:9px;margin:0 0 22px;padding:0;border:0}.bio-lab-choice-grid legend{width:100%;margin-bottom:10px;color:#42564a;font-size:.72rem;font-weight:900}.bio-lab-choice-grid button{display:flex;align-items:center;gap:10px;min-height:74px;padding:12px;border:1px solid #c6d8ca;border-radius:6px;background:#fff;color:#31533b;text-align:left}.bio-lab-choice-grid button.selected{border:2px solid var(--lab-green);background:#eaf5ed}.mitosis-reference-toggle{width:max-content;margin-bottom:14px}.mitosis-phase-reference{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-bottom:22px;border-top:1px solid #cad9ce;border-left:1px solid #cad9ce}.mitosis-phase-reference>div{display:grid;align-content:start;grid-gap:5px;gap:5px;padding:10px;border-right:1px solid #cad9ce;border-bottom:1px solid #cad9ce}.mitosis-phase-reference svg{display:block;width:100%;height:auto}.mitosis-phase-reference strong{font-size:.68rem}.mitosis-phase-reference small{color:#63736a;font-size:.57rem;line-height:1.45}.mitosis-cell-wall{fill:#f4f0e7;stroke:#5c7d66;stroke-width:3}.mitosis-fading-nucleus,.mitosis-nucleus{fill:#f2dbe3;stroke:#a84b5d;stroke-width:3}.mitosis-fading-nucleus{fill:none;stroke-dasharray:4 3}.mitosis-nucleolus{fill:#714f89}.mitosis-chromatin,.mitosis-chromosomes path{fill:none;stroke:#b54759;stroke-width:5;stroke-linecap:round}.mitosis-spindle{stroke:#3c8e86;stroke-width:2}.mitosis-cell-plate{stroke:#5a8d63;stroke-width:5}.mitosis-specimen-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px;margin-bottom:16px}.mitosis-specimen-grid article{display:grid;grid-gap:5px;gap:5px;padding:16px;border:1px solid #c8d9cd;border-top:4px solid var(--lab-green);background:#fff}.mitosis-specimen-grid strong{font-size:.78rem}.mitosis-specimen-grid small,.mitosis-specimen-grid span{color:#64756a;font-size:.63rem;line-height:1.5}.mitosis-method-note{display:grid;grid-template-columns:28px minmax(0,1fr);grid-gap:10px;gap:10px;margin:16px 0;padding:14px;border-left:5px solid var(--lab-gold);background:#fff8df;color:#66531d}.mitosis-method-note strong{font-size:.73rem}.mitosis-method-note p{margin:3px 0 0;font-size:.64rem;line-height:1.55}.mitosis-field-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.mitosis-field-toolbar button{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 11px;border:1px solid #bcd0c1;border-radius:5px;background:#fff;color:#2e5638;font-size:.65rem;font-weight:850}.mitosis-field-toolbar button[aria-pressed=true]{border-color:var(--lab-green);background:#e8f4eb}.mitosis-microscope-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(260px,.55fr);grid-gap:18px;gap:18px}.mitosis-real-figure{min-width:0;margin:0}.mitosis-real-viewport{position:relative;aspect-ratio:1122/1150;overflow:hidden;border:1px solid #9eb5a5;background:#101916}.mitosis-real-layer{position:absolute;inset:0;transition:transform .3s ease}.mitosis-real-layer>img{object-fit:contain}.mitosis-real-marker{position:absolute;z-index:2;display:grid;place-items:center;width:calc(var(--cell-radius) * 2);min-width:28px;max-width:54px;aspect-ratio:1;translate:-50% -50%;border:2px solid #fff;border-radius:50%;background:rgba(19,91,55,.88);color:#fff;box-shadow:0 0 0 3px rgba(19,91,55,.55);font-size:.68rem;font-weight:900}.mitosis-real-marker.selected,.mitosis-real-marker:focus-visible,.mitosis-real-marker:hover{outline:3px solid #f2bf31;outline-offset:2px}.mitosis-real-marker.correct{background:#237a44}.mitosis-real-marker.incorrect{background:#b34952}.mitosis-real-figure figcaption{display:flex;align-items:center;gap:7px;padding:10px 12px;border:1px solid #c7d8cc;border-top:0;color:#587064;font-size:.62rem}.mitosis-classifier{display:grid;align-content:start;grid-gap:12px;gap:12px;padding:16px;border:1px solid #c7d8cc;background:#f8fbf9}.mitosis-classifier>span{color:var(--lab-green);font-size:.63rem;font-weight:900}.mitosis-classifier h3{margin:0;font-size:.9rem}.mitosis-classifier>small{color:#66776d;font-size:.6rem;line-height:1.55}.mitosis-phase-buttons{display:grid;grid-gap:6px;gap:6px}.mitosis-phase-buttons button{min-height:40px;padding:0 9px;border:1px solid #bfd0c3;border-radius:5px;background:#fff;color:#31523b;text-align:left;font-size:.64rem}.mitosis-phase-buttons button.selected{border-color:var(--lab-green);background:#e6f3e9;font-weight:900}.mitosis-feedback{margin:0;padding:10px;border-left:4px solid var(--lab-gold);background:#fff7df;color:#66521d;font-size:.64rem;line-height:1.5}.mitosis-experiment-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}.mitosis-index-chart{margin:0 0 18px;padding:16px;border:1px solid #c7d8cc}.mitosis-index-chart figcaption{display:grid;grid-gap:3px;gap:3px}.mitosis-index-chart figcaption span{color:#66776d;font-size:.62rem}.mitosis-bar-plot{display:grid;grid-gap:12px;gap:12px;margin-top:16px}.mitosis-bar-item{display:grid;grid-template-columns:170px minmax(0,1fr) 55px;align-items:center;grid-gap:10px;gap:10px}.mitosis-bar-item span{font-size:.64rem}.mitosis-bar-item>div{height:12px;background:#e9efeb}.mitosis-bar-item i{display:block;height:100%;background:#3d8c62}.mitosis-bar-item strong{font-size:.72rem}.mitosis-duration-panel{margin:18px 0;padding:16px;border-left:5px solid #3b858b;background:#edf7f8}.mitosis-duration-panel h3{margin:0 0 5px;font-size:.82rem}.mitosis-duration-panel p{color:#556c66;font-size:.64rem;line-height:1.55}.mitosis-duration-panel>div{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid #bed3d5;border-left:1px solid #bed3d5}.mitosis-duration-panel span{display:grid;grid-gap:3px;gap:3px;padding:9px;border-right:1px solid #bed3d5;border-bottom:1px solid #bed3d5;font-size:.61rem}.bio-lab-guidance{padding:12px;border-left:5px solid var(--lab-gold);background:#fff8df;color:#66531d;font-size:.65rem}.photo-cer-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px;margin-bottom:16px}.photo-cer-grid label{display:grid;align-content:start;grid-gap:7px;gap:7px}.photo-cer-grid span{font-size:.72rem;font-weight:900}.photo-cer-grid small{min-height:48px;color:#687970;font-size:.59rem;line-height:1.45}.photo-cer-grid textarea{width:100%;resize:vertical;padding:10px;border:1px solid #bcd0c1;border-radius:5px;font:inherit;line-height:1.5}.bio-lab-report-feedback{padding:12px;border-left:5px solid var(--lab-gold);background:#fff8df;color:#66531d;font-size:.65rem}.bio-lab-report-feedback.success{border-color:var(--lab-green);background:#e9f5ec;color:#285b38}.mitosis-complete-panel{display:grid;grid-template-columns:38px minmax(0,1fr);grid-gap:12px;gap:12px;margin-top:16px;padding:16px;border:1px solid #acd0b5;background:#ecf7ef;color:#285b38}.mitosis-complete-panel h3{margin:3px 0}.mitosis-complete-panel p{font-size:.66rem}.mitosis-complete-panel a{display:inline-flex;align-items:center;gap:5px;font-size:.68rem;font-weight:900}@media(max-width:860px){.mitosis-microscope-layout{grid-template-columns:1fr}.mitosis-phase-reference{grid-template-columns:repeat(2,1fr)}.photo-cer-grid{grid-template-columns:1fr}.photo-cer-grid small{min-height:0}}@media(max-width:620px){.mitosis-conclusion-stage,.mitosis-data-stage,.mitosis-design-stage,.mitosis-experiment-stage,.mitosis-question-stage{padding:18px 14px}.bio-lab-stage-heading.compact{display:grid}.bio-lab-choice-grid,.mitosis-specimen-grid{grid-template-columns:1fr}.mitosis-real-marker{min-width:30px}.mitosis-experiment-actions{align-items:stretch;flex-direction:column}.mitosis-experiment-actions button{width:100%}.mitosis-bar-item{grid-template-columns:95px minmax(0,1fr) 48px}.mitosis-duration-panel>div{grid-template-columns:1fr 1fr}}.mini-concentrations button,.mini-experiment-actions button{width:44px;height:44px}.mini-experiment-actions a,.mini-experiment-actions>button:first-child{min-height:44px}.biology-catalog-heading input,.biology-curriculum-browser input,.platform-search-field input{height:100%}.biology-grade-filter button{min-height:44px}