@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800;900&display=swap');
:root{--blue:#3978f6;--blue-dark:#2459c7;--blue-soft:#eaf1ff;--yellow:#ffcb45;--yellow-soft:#fff5d3;--green:#24a66a;--green-soft:#e5f8ee;--purple:#8054d9;--purple-soft:#f1eaff;--orange:#ff8b37;--orange-soft:#fff0e3;--ink:#25324a;--muted:#6c7890;--line:#e4e9f2;--paper:#fff;--bg:#f5f8ff;--red:#d94f53;--red-soft:#fff0f0;--shadow:0 12px 35px rgba(42,73,130,.09);--radius:22px;--radius-sm:14px;--text-size:1rem}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Nunito',system-ui,-apple-system,Segoe UI,sans-serif;font-size:var(--text-size);line-height:1.55}body.large-text{--text-size:1.12rem}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #ffb52d;outline-offset:3px}button:disabled{cursor:not-allowed;opacity:.55}.skip-link{position:absolute;top:-60px;left:12px;background:#fff;padding:10px 16px;border-radius:10px;z-index:100}.skip-link:focus{top:12px}.site-header{background:#fff;box-shadow:0 5px 20px rgba(39,75,135,.06);position:sticky;top:0;z-index:20}.header-inner{max-width:1240px;margin:auto;display:flex;align-items:center;gap:20px;padding:13px 24px 8px}.brand{display:flex;gap:12px;align-items:center;min-width:0;border:0;background:none;color:inherit;text-align:left;padding:0}.brand-mark{width:48px;height:48px;padding:7px;display:grid;grid-template-columns:1fr 1fr;gap:3px;background:var(--blue);border-radius:16px;transform:rotate(-5deg);flex-shrink:0}.brand-mark span{background:#fff;border-radius:4px}.brand-mark span:nth-child(2){background:var(--yellow)}.brand-mark span:nth-child(3){background:#8ce0b0}.brand-mark span:nth-child(4){background:#d9c3ff}.brand-copy{display:grid;line-height:1.2}.brand-copy strong{font-size:1rem;font-weight:900;letter-spacing:-.3px}.brand-copy small{font-size:.75rem;color:var(--muted);margin-top:5px}.header-stats{display:flex;gap:8px;margin-left:auto}.stat-chip{display:flex;gap:7px;align-items:center;padding:6px 11px;border:1px solid var(--line);border-radius:13px;background:#fff;min-width:72px}.stat-chip>span:first-child{font-size:1.1rem}.stat-chip>span:last-child{display:grid;line-height:1.1}.stat-chip small{color:var(--muted);font-size:.65rem}.stat-chip strong{font-size:.9rem;font-weight:900}.xp-chip{background:#fff9e9;border-color:#ffebad}.star-chip{background:#fff9e9;border-color:#ffebad}.icon-button{width:44px;height:44px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:14px;background:#fff;font-size:1.1rem;color:var(--ink)}.icon-button:hover{background:var(--blue-soft)}.main-nav{display:flex;gap:7px;max-width:1240px;margin:auto;padding:2px 24px 12px;overflow-x:auto;scrollbar-width:thin}.nav-item{display:flex;align-items:center;gap:8px;white-space:nowrap;border:0;background:transparent;color:var(--muted);font-weight:800;font-size:.9rem;padding:10px 15px;border-radius:13px;min-height:44px}.nav-item span{font-size:1rem}.nav-item:hover{background:#f2f5fb;color:var(--ink)}.nav-item.active{background:var(--blue-soft);color:var(--blue-dark)}.app-main{max-width:1240px;min-height:70vh;margin:0 auto;padding:30px 24px 54px}.site-footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding:18px 24px;color:var(--muted);font-size:.78rem;background:#fff}.hero{overflow:hidden;position:relative;display:grid;grid-template-columns:1.35fr .65fr;align-items:center;gap:22px;padding:35px 38px;border-radius:30px;background:linear-gradient(125deg,#eaf2ff 0%,#eff9ff 50%,#f2edff 100%);border:1px solid #dde8ff;box-shadow:var(--shadow);margin-bottom:27px}.hero:after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(255,203,69,.23);right:9%;top:-150px}.eyebrow{display:block;font-size:.72rem;letter-spacing:1.3px;font-weight:900;color:var(--blue);margin-bottom:6px}.hero h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1.08;letter-spacing:-1.4px;margin:0 0 14px;font-weight:900;max-width:720px}.hero h1 .highlight{color:var(--blue)}.hero p{max-width:650px;color:#56637d;margin:0 0 20px;font-size:1.03rem}.hero-buttons{display:flex;flex-wrap:wrap;gap:10px}.hero-art{position:relative;z-index:1;min-height:180px;display:grid;place-items:center}.hero-pizza{width:164px;height:164px;border-radius:50%;background:conic-gradient(#ffb746 0 45deg,#ffe8a6 45deg 90deg,#ffb746 90deg 135deg,#ffe8a6 135deg 180deg,#ffb746 180deg 225deg,#ffe8a6 225deg 270deg,#ffb746 270deg 315deg,#ffe8a6 315deg);border:10px solid #be6c36;box-shadow:0 12px 0 rgba(123,73,42,.16);position:relative;transform:rotate(-13deg)}.hero-pizza:before{content:"🍅  🫒";position:absolute;inset:0;display:grid;place-items:center;font-size:2.8rem;text-shadow:0 1px #fff;transform:rotate(12deg)}.hero-orbit{position:absolute;font-size:2.1rem;animation:bob 3s ease-in-out infinite}.hero-orbit.one{top:0;left:15%}.hero-orbit.two{right:7%;top:25%;animation-delay:.7s}.hero-orbit.three{bottom:0;left:22%;animation-delay:1.2s}@keyframes bob{0%,100%{transform:translateY(0) rotate(-5deg)}50%{transform:translateY(-9px) rotate(5deg)}}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:14px;margin:28px 0 15px}.section-heading h2{font-size:1.45rem;letter-spacing:-.4px;margin:0;font-weight:900}.section-heading p{margin:4px 0 0;color:var(--muted);font-size:.9rem}.text-link{border:0;background:transparent;color:var(--blue);font-weight:900;padding:8px}.island-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.island-card,.panel-card,.content-card,.game-card,.stat-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 6px 20px rgba(42,73,130,.035)}.island-card{padding:19px;display:flex;flex-direction:column;min-height:240px;position:relative;overflow:hidden;transition:transform .18s,box-shadow .18s}.island-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.island-top{display:flex;justify-content:space-between;align-items:start;gap:10px}.island-emoji{display:grid;place-items:center;width:62px;height:62px;font-size:2rem;border-radius:19px;background:var(--tint,#eaf1ff)}.island-number{font-size:.72rem;color:var(--muted);font-weight:900;letter-spacing:.5px}.island-card h3{font-size:1.1rem;margin:13px 0 5px;font-weight:900}.island-card p{font-size:.85rem;color:var(--muted);margin:0 0 17px;flex:1}.progress-meta{display:flex;justify-content:space-between;gap:10px;font-size:.75rem;font-weight:800;margin-bottom:7px}.progress-track{width:100%;height:8px;background:#edf1f8;border-radius:100px;overflow:hidden}.progress-fill{height:100%;background:var(--blue);border-radius:100px;transition:width .3s}.island-footer{display:flex;gap:10px;align-items:center;margin-top:14px}.island-footer .btn{flex:1}.mini-stars{white-space:nowrap;color:#e0a71f;font-weight:900;font-size:.8rem}.dashboard-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:16px;margin-top:19px}.panel-card{padding:22px}.panel-title{display:flex;align-items:center;gap:10px;margin:0 0 15px;font-size:1.1rem;font-weight:900}.panel-icon{width:40px;height:40px;border-radius:13px;background:var(--blue-soft);display:grid;place-items:center;font-size:1.25rem}.continue-content{display:flex;gap:16px;align-items:center}.continue-emoji{width:75px;height:75px;display:grid;place-items:center;border-radius:20px;background:var(--yellow-soft);font-size:2.3rem;flex-shrink:0}.continue-content h3{margin:0;font-size:1.05rem}.continue-content p{margin:4px 0 12px;font-size:.86rem;color:var(--muted)}.activity-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.activity-tile{border:1px solid var(--line);background:#fff;border-radius:16px;display:flex;gap:12px;align-items:center;padding:14px;text-align:left;color:var(--ink);min-height:78px}.activity-tile:hover{border-color:#bfd0ff;background:#f8faff}.activity-tile .activity-emoji{font-size:1.6rem}.activity-tile strong{display:block;font-size:.91rem}.activity-tile small{display:block;color:var(--muted);font-size:.76rem}.btn{border:0;border-radius:13px;min-height:46px;padding:11px 17px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:900;font-size:.9rem;text-decoration:none;transition:transform .12s,filter .12s;background:#fff;color:var(--ink)}.btn:active{transform:scale(.98)}.btn-primary{background:var(--blue);color:#fff;box-shadow:0 5px 0 #245bc8}.btn-primary:hover{filter:brightness(1.04)}.btn-orange{background:var(--orange);color:#fff;box-shadow:0 5px 0 #d66a20}.btn-green{background:var(--green);color:#fff;box-shadow:0 5px 0 #187c4c}.btn-purple{background:var(--purple);color:#fff;box-shadow:0 5px 0 #633bb8}.btn-quiet{background:#f2f5fa;color:var(--ink);border:1px solid var(--line)}.btn-danger{background:var(--red);color:#fff}.btn-small{min-height:38px;padding:8px 12px;border-radius:11px;font-size:.82rem}.btn-block{width:100%}.page-intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}.page-intro h1{margin:0;font-size:clamp(1.7rem,3vw,2.4rem);font-weight:900;letter-spacing:-.7px}.page-intro p{margin:6px 0 0;color:var(--muted)}.page-intro .intro-icon{width:66px;height:66px;display:grid;place-items:center;border-radius:22px;background:var(--yellow-soft);font-size:2.2rem;flex-shrink:0}.module-banner{background:var(--module-bg,#eaf1ff);border:1px solid var(--module-border,#d5e2ff);border-radius:25px;padding:25px;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;margin-bottom:20px}.module-banner h1{font-size:clamp(1.55rem,3vw,2.3rem);margin:0;font-weight:900;line-height:1.15}.module-banner p{margin:8px 0 0;color:#55627a;max-width:750px}.module-banner .module-emoji{font-size:3.1rem}.module-tabs{display:flex;gap:8px;overflow:auto;padding:3px 2px 12px;margin-bottom:12px}.tab-button{flex-shrink:0;border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px 14px;min-height:43px;font-weight:900;color:var(--muted)}.tab-button.active{background:var(--blue);color:#fff;border-color:var(--blue)}.module-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,.6fr);gap:18px;align-items:start}.content-card{padding:24px;min-width:0}.content-card h2{margin:0 0 12px;font-size:1.4rem}.content-card h3{margin:21px 0 8px;font-size:1.05rem}.content-card p{color:#4d5a73}.content-card li{margin:7px 0;color:#4d5a73}.math-box{border-radius:16px;background:#f7f9ff;border:1px dashed #cad8f6;padding:18px;text-align:center;margin:14px 0;color:#25324a;font-size:1.1rem;overflow-x:auto}.learning-goal{background:#f0fbf5;border-left:4px solid var(--green);padding:12px 15px;border-radius:0 13px 13px 0;margin-bottom:16px}.learning-goal strong{display:block;color:#187c4c}.step-list{counter-reset:steps;list-style:none;padding:0}.step-list li{counter-increment:steps;display:flex;gap:10px;align-items:start}.step-list li:before{content:counter(steps);width:26px;height:26px;display:grid;place-items:center;background:var(--blue-soft);color:var(--blue-dark);border-radius:50%;font-weight:900;font-size:.8rem;flex-shrink:0}.formula-row{display:flex;gap:10px;flex-wrap:wrap}.formula-pill{background:#f5f7fc;border:1px solid var(--line);border-radius:12px;padding:9px 12px}.module-aside{display:grid;gap:14px}.aside-progress{padding:19px}.aside-progress h3{margin:0 0 14px}.aside-metric{display:flex;justify-content:space-between;gap:10px;margin:10px 0;font-size:.85rem}.aside-metric strong{font-weight:900}.callout{padding:14px;border-radius:15px;background:var(--yellow-soft);color:#6d5310;font-size:.85rem}.callout strong{display:block;margin-bottom:4px}.simulation-controls{display:flex;gap:9px;flex-wrap:wrap;align-items:end;margin:15px 0}.field{display:grid;gap:5px;min-width:100px;flex:1}.field label{font-size:.8rem;font-weight:900;color:#59677e}.field input,.field select,.answer-input,.select-input{width:100%;border:1px solid #cbd5e5;background:white;border-radius:12px;padding:10px 12px;min-height:46px;color:var(--ink)}.field input[type=range]{padding:0;min-height:36px;accent-color:var(--blue)}.visual-board{padding:18px;border:1px solid var(--line);background:#fbfcff;border-radius:18px;min-width:0;overflow:hidden}.visual-label{text-align:center;color:var(--muted);font-size:.8rem;font-weight:800;margin:0 0 13px}.fraction-text{font-size:1.15rem;font-weight:900;text-align:center;margin:10px 0}.fraction-pieces{display:flex;gap:4px;justify-content:center;flex-wrap:wrap;margin:12px 0}.fraction-piece{height:45px;min-width:20px;flex:1;max-width:72px;border:2px solid #6d87b7;background:#fff;border-radius:7px;display:grid;place-items:center;color:#52617b;font-weight:900;padding:0 3px}.fraction-piece.shaded{background:repeating-linear-gradient(135deg,#3978f6 0 8px,#72a0ff 8px 13px);border-color:#2459c7;color:#fff}.fraction-piece.interactive{cursor:pointer}.fraction-piece:focus-visible{outline:3px solid var(--yellow)}.fraction-pieces.vertical{flex-direction:column;align-items:center;max-width:95px;margin:12px auto}.fraction-pieces.vertical .fraction-piece{width:100%;max-width:95px;min-height:27px;height:27px;flex:auto}.bar-comparison{display:grid;gap:17px}.bar-row{display:grid;grid-template-columns:45px 1fr 65px;gap:8px;align-items:center}.bar-track{height:27px;border:1px solid #b7c5dd;background:repeating-linear-gradient(90deg,#fff 0 calc(var(--part) - 1px),#d9e1ef calc(var(--part) - 1px) var(--part));border-radius:8px;overflow:hidden}.bar-fill{height:100%;background:repeating-linear-gradient(135deg,#4f85f9 0 8px,#8db0ff 8px 13px);border-right:2px solid #275ac1}.bar-label{font-size:.83rem;font-weight:900}.number-line{position:relative;height:74px;margin:16px 14px 25px;border-bottom:3px solid #7f8da5}.number-line .tick{position:absolute;bottom:-7px;width:3px;height:15px;background:#7f8da5}.number-line .tick-label{position:absolute;top:17px;transform:translateX(-50%);font-size:.7rem;color:var(--muted)}.number-line .marker{position:absolute;bottom:-7px;width:14px;height:14px;border-radius:50%;background:var(--orange);border:2px solid white;box-shadow:0 0 0 2px var(--orange);transform:translateX(-50%)}.number-line .marker-label{position:absolute;bottom:22px;transform:translateX(-50%);white-space:nowrap;font-size:.8rem;font-weight:900;color:#b45a12}.hundred-grid{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:3px;width:min(100%,360px);margin:14px auto}.grid-cell{aspect-ratio:1/1;border:1px solid #ced8e9;background:#fff;border-radius:3px;cursor:pointer;padding:0;min-width:0;min-height:0}.grid-cell.filled{background:repeating-linear-gradient(135deg,#7d57d8 0 5px,#b79aef 5px 8px);border-color:#7247c3}.grid-cell:focus-visible{outline:2px solid var(--orange);outline-offset:1px}.result-strip{margin-top:15px;padding:13px 15px;border-radius:14px;background:var(--blue-soft);display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.result-strip strong{font-size:1rem}.quiz-wrap{max-width:850px;margin:0 auto}.quiz-topline{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;color:var(--muted);font-weight:900;font-size:.82rem;margin-bottom:10px}.quiz-progress{height:8px;border-radius:20px;background:#e7edf7;overflow:hidden;margin-bottom:20px}.quiz-progress span{display:block;height:100%;background:var(--blue);border-radius:20px}.question-card{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:clamp(20px,4vw,34px)}.question-card h2{font-size:clamp(1.15rem,2.6vw,1.55rem);line-height:1.4;margin:0 0 17px}.question-context{background:#fff8e5;border:1px solid #ffebad;border-radius:14px;padding:13px 15px;margin:12px 0;color:#6b5518}.answer-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:18px 0}.answer-option{border:2px solid var(--line);background:#fff;border-radius:15px;padding:14px;min-height:62px;text-align:left;display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}.answer-option .option-letter{width:28px;height:28px;flex-shrink:0;display:grid;place-items:center;border-radius:9px;background:#f0f3fa;font-size:.8rem}.answer-option.selected{border-color:var(--blue);background:var(--blue-soft)}.answer-option.correct{border-color:var(--green);background:var(--green-soft)}.answer-option.incorrect{border-color:var(--red);background:var(--red-soft)}.feedback-box{border-radius:15px;padding:14px 16px;margin:15px 0}.feedback-box.correct{background:var(--green-soft);border:1px solid #b6e8ca}.feedback-box.incorrect{background:var(--red-soft);border:1px solid #fac7c9}.feedback-box strong{display:block}.feedback-box p{margin:5px 0 0;font-size:.9rem}.quiz-actions{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:18px}.quiz-actions .right-actions{display:flex;gap:8px}.quiz-input-row{max-width:440px;margin:15px 0}.quiz-finished{text-align:center;padding:30px 15px}.result-trophy{font-size:4rem;margin-bottom:10px}.result-score{font-size:3rem;font-weight:900;color:var(--blue);line-height:1.1}.result-badges{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin:18px 0}.pill{display:inline-flex;align-items:center;gap:6px;padding:7px 11px;background:#f0f4fb;border-radius:100px;font-size:.8rem;font-weight:900}.pill.good{background:var(--green-soft);color:#187c4c}.pill.gold{background:var(--yellow-soft);color:#7f5a00}.lab-tabs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:9px;margin-bottom:15px}.lab-tab{border:1px solid var(--line);background:#fff;border-radius:15px;padding:12px 8px;display:grid;place-items:center;gap:5px;color:var(--muted);font-weight:900;font-size:.8rem;min-height:84px}.lab-tab span{font-size:1.5rem}.lab-tab.active{border-color:var(--blue);background:var(--blue-soft);color:var(--blue-dark)}.lab-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.8fr);gap:17px}.lab-layout .visual-board{min-height:290px}.lab-help{padding:18px;background:#f7f9ff;border-radius:17px;border:1px solid var(--line)}.lab-help h3{margin:0 0 8px}.lab-help p{margin:0;color:var(--muted);font-size:.9rem}.games-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.game-card{overflow:hidden}.game-card-top{padding:21px;display:flex;gap:15px;align-items:center;background:var(--game-bg,#f1eaff)}.game-card-icon{width:70px;height:70px;border-radius:20px;display:grid;place-items:center;font-size:2.3rem;background:rgba(255,255,255,.72);flex-shrink:0}.game-card h2{font-size:1.15rem;margin:0 0 4px}.game-card-top p{font-size:.86rem;color:#606b81;margin:0}.game-card-bottom{padding:18px 21px;display:flex;justify-content:space-between;align-items:center;gap:10px}.game-play-area{margin-top:22px}.game-play-area .content-card{padding:25px}.game-task{text-align:center;padding:8px 0 16px}.game-task .big-math{font-size:1.7rem;font-weight:900;margin:8px}.pizza-game-board{max-width:450px;margin:15px auto}.pizza-game-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:15px auto;max-width:390px}.pizza-piece-btn{min-height:60px;border:2px dashed #cf9c59;background:#fff4d7;border-radius:12px;font-size:1.4rem}.pizza-piece-btn.selected{background:#ffd46b;border-style:solid;border-color:#d78c1a}.match-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;max-width:640px;margin:18px auto}.match-card{min-height:105px;border:2px solid #d9ddf0;background:#f7f4ff;border-radius:16px;font-weight:900;padding:10px;display:grid;place-items:center;text-align:center;font-size:1rem}.match-card.flipped{background:#eaf2ff;border-color:var(--blue)}.match-card.matched{background:var(--green-soft);border-color:var(--green)}.choice-duel{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;margin:20px auto;max-width:520px}.duel-choice{border:2px solid var(--line);background:#fff;border-radius:20px;min-height:100px;padding:15px;font-size:1.3rem;font-weight:900}.duel-choice:hover{border-color:var(--blue);background:var(--blue-soft)}.tower-stack{display:flex;flex-direction:column-reverse;gap:4px;align-items:center;min-height:125px;margin:15px auto}.tower-block{height:21px;width:calc(100% - var(--offset,0px));max-width:290px;border-radius:5px;background:linear-gradient(90deg,#916be0,#b59bef);border:1px solid #8054d9}.teacher-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:17px}.teacher-stat{padding:17px;background:#fff;border:1px solid var(--line);border-radius:17px}.teacher-stat .stat-icon{font-size:1.45rem}.teacher-stat strong{display:block;font-size:1.55rem;font-weight:900;line-height:1.3}.teacher-stat small{color:var(--muted);font-weight:800}.teacher-module-row{display:grid;grid-template-columns:minmax(130px,.8fr) minmax(140px,1.5fr) 80px;gap:12px;align-items:center;padding:13px 0;border-bottom:1px solid var(--line)}.teacher-module-row:last-child{border-bottom:0}.teacher-module-row strong{font-size:.9rem}.teacher-module-row small{color:var(--muted)}.achievement-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.achievement{display:flex;gap:10px;align-items:center;padding:12px;border:1px solid var(--line);border-radius:14px;background:#fff}.achievement.locked{opacity:.5;filter:grayscale(1)}.achievement .badge-emoji{font-size:1.8rem}.achievement strong{display:block;font-size:.85rem}.achievement small{display:block;font-size:.72rem;color:var(--muted)}.empty-state{text-align:center;padding:30px 15px;color:var(--muted)}.empty-state .empty-icon{font-size:3rem;margin-bottom:8px}.dialog-shell{padding:24px;min-width:min(92vw,480px);max-width:580px}.app-dialog{padding:0;border:none;border-radius:22px;box-shadow:0 25px 90px rgba(27,44,78,.28);max-width:calc(100vw - 24px)}.app-dialog::backdrop{background:rgba(24,36,62,.46);backdrop-filter:blur(3px)}.dialog-heading{display:flex;align-items:start;justify-content:space-between;gap:12px;margin-bottom:14px}.dialog-heading h2{margin:0;font-size:1.45rem}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:15px 0;border-bottom:1px solid var(--line);cursor:pointer}.setting-row>span{display:grid}.setting-row small{color:var(--muted);font-size:.78rem}.setting-row input[type=checkbox]{width:22px;height:22px;accent-color:var(--blue);flex-shrink:0}.setting-row select{padding:9px;border:1px solid var(--line);border-radius:10px;background:white}.dialog-actions{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap;margin-top:22px}.small-dialog .dialog-shell{min-width:min(90vw,390px)}.toast-region{position:fixed;right:18px;bottom:18px;z-index:90;display:grid;gap:8px;max-width:min(370px,calc(100vw - 36px))}.toast{background:#273650;color:#fff;border-radius:14px;padding:13px 16px;box-shadow:var(--shadow);font-weight:800;font-size:.88rem;animation:toast-in .2s ease-out}.toast.success{background:#16754a}.toast.warning{background:#9d5a0d}.toast.error{background:#a9343c}@keyframes toast-in{from{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.breathe{animation:bob 3s ease-in-out infinite}.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}.muted{color:var(--muted)}.small-note{font-size:.8rem;color:var(--muted)}.spacer{height:12px}.inline-code{font-family:ui-monospace,monospace;background:#f0f4fb;padding:2px 5px;border-radius:5px}.hidden{display:none!important}
body.no-motion *,body.no-motion *::before,body.no-motion *::after{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.001ms!important}
@media (max-width:900px){.header-inner{padding-inline:16px}.main-nav{padding-inline:16px}.app-main{padding:22px 16px 42px}.hero{padding:28px;grid-template-columns:1.2fr .8fr}.island-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.module-layout,.lab-layout{grid-template-columns:1fr}.module-aside{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lab-tabs{grid-template-columns:repeat(5,minmax(88px,1fr));overflow-x:auto}.achievement-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.header-inner{gap:10px;flex-wrap:wrap;padding-top:10px}.brand-mark{width:41px;height:41px;border-radius:13px}.brand-copy strong{font-size:.88rem}.brand-copy small{font-size:.68rem}.header-stats{order:3;width:100%;margin:0;justify-content:space-between}.stat-chip{flex:1;justify-content:center}.settings-open{margin-left:auto}.main-nav{padding-top:8px;padding-bottom:8px;gap:4px}.nav-item{padding:9px 12px;font-size:.8rem}.app-main{padding:16px 12px 35px}.hero{grid-template-columns:1fr;padding:24px 20px;gap:8px}.hero h1{font-size:2.1rem}.hero p{font-size:.93rem}.hero-art{min-height:155px}.hero-pizza{width:130px;height:130px}.hero-pizza:before{font-size:2.2rem}.hero-orbit{font-size:1.6rem}.section-heading{margin-top:24px;align-items:start}.section-heading h2{font-size:1.25rem}.section-heading p{font-size:.8rem}.island-grid{grid-template-columns:1fr;gap:12px}.island-card{min-height:unset;padding:16px}.island-emoji{width:52px;height:52px;font-size:1.7rem}.island-card h3{margin-top:10px}.dashboard-grid{grid-template-columns:1fr}.panel-card{padding:17px}.activity-grid{grid-template-columns:1fr}.continue-content{align-items:start}.continue-emoji{width:58px;height:58px;font-size:1.8rem}.page-intro h1{font-size:1.7rem}.page-intro p{font-size:.88rem}.page-intro .intro-icon{width:54px;height:54px;font-size:1.8rem}.module-banner{padding:20px;grid-template-columns:1fr auto}.module-banner .module-emoji{font-size:2.2rem}.module-banner p{font-size:.88rem}.content-card{padding:18px}.module-aside{grid-template-columns:1fr}.answer-options{grid-template-columns:1fr}.question-card{padding:19px}.quiz-actions{flex-direction:column}.quiz-actions>.btn,.quiz-actions .right-actions{width:100%}.quiz-actions .right-actions .btn{flex:1}.lab-tabs{margin-right:-4px}.lab-tab{min-height:75px;font-size:.73rem}.lab-layout .visual-board{min-height:220px;padding:13px}.games-grid{grid-template-columns:1fr}.game-card-top{padding:17px}.game-card-bottom{padding:15px 17px}.match-board{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.match-card{min-height:86px;font-size:.88rem;padding:6px}.teacher-grid{gap:8px}.teacher-stat{padding:13px}.teacher-stat strong{font-size:1.3rem}.teacher-module-row{grid-template-columns:1fr 1.3fr 52px;gap:8px}.teacher-module-row strong{font-size:.8rem}.teacher-module-row small{font-size:.7rem}.achievement-grid{grid-template-columns:1fr}.site-footer{padding:16px;font-size:.72rem}.dialog-shell{padding:20px}.dialog-actions{flex-direction:column-reverse}.dialog-actions .btn{width:100%}.field{min-width:calc(50% - 8px)}.bar-row{grid-template-columns:38px 1fr 54px}.fraction-piece{height:37px}.pizza-game-grid{gap:5px}.pizza-piece-btn{min-height:53px}}
@media (orientation:landscape) and (max-height:520px){.site-header{position:relative}.hero{grid-template-columns:1.5fr .5fr}.hero-art{min-height:110px}.hero-pizza{width:110px;height:110px}.header-stats{margin-left:auto}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.001ms!important}}
.order-instructions{padding:12px 14px;margin:15px 0;background:var(--blue-soft);border-radius:13px;font-size:.88rem;font-weight:800;color:var(--blue-dark)}.order-list{display:grid;gap:9px;margin:14px 0}.order-item{display:grid;grid-template-columns:32px 1fr auto;gap:12px;align-items:center;border:1px solid var(--line);background:#fff;padding:9px 10px 9px 13px;border-radius:14px;min-height:60px}.order-item>strong{font-size:1.12rem;text-align:center}.order-rank{display:grid;place-items:center;width:28px;height:28px;background:#f0f4fb;color:var(--muted);font-weight:900;border-radius:9px}.order-controls{display:flex;gap:5px}.order-controls .icon-button{width:42px;height:42px;font-size:1.2rem}.order-controls button:disabled{opacity:.32}
.picture-options{grid-template-columns:repeat(2,minmax(0,1fr))}.picture-choice{display:grid;gap:10px;width:100%;justify-items:center}.picture-mini-bar{display:flex;gap:3px;justify-content:center;width:min(100%,240px);height:35px}.picture-mini-piece{flex:1;border:1.5px solid #6684bd;border-radius:4px;background:#fff;min-width:5px}.picture-mini-piece.filled{background:repeating-linear-gradient(135deg,#3978f6 0 6px,#8db0ff 6px 10px);border-color:#2459c7}.picture-choice>span:last-child{font-size:1rem;font-weight:900}.picture-options .answer-option{justify-content:center;min-height:100px;text-align:center}
/* Fallback matematika jika MathJax tidak dapat dimuat. */
.math-fallback{display:inline-block;vertical-align:middle;line-height:1.45;white-space:normal}
.fallback-fraction{display:inline-grid;grid-template-rows:auto auto;text-align:center;vertical-align:middle;line-height:1.1;min-width:1.15em;margin:0 .12em;font-size:.92em}
.fallback-fraction>span:first-child{border-bottom:1.5px solid currentColor;padding:0 .14em .08em}
.fallback-fraction>span:nth-child(2){padding:.08em .14em 0}
/* Area sentuh yang lapang pada perangkat mobile. */
.btn{min-height:48px}
.btn-small{min-height:48px}
.icon-button{width:48px;height:48px}
.nav-item{min-height:48px}
.tab-button{min-height:48px}
.field input,.field select,.answer-input,.select-input{min-height:48px}
.field input[type=range]{min-height:48px}
.order-controls .icon-button{width:48px;height:48px}