@import url('');:root{--navy:#101c3a;--ink:#192849;--muted:#687b96;--teal:#2dd4bf;--paper:#f4f7fc;--line:#e0e8f3;--gold:#ffd166;--shadow:0 22px 70px #15254a18;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#f5f8ff,#f4f7fc 60%,#eef4fb);color:var(--ink)}button,a{font:inherit;touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}.top{height:76px;padding:0 clamp(16px,4vw,58px);display:flex;align-items:center;justify-content:space-between;background:#fffdf2d9;backdrop-filter:blur(18px);border-bottom:1px solid #dfe8f3;position:sticky;top:0;z-index:5}.brand{display:flex;align-items:center;gap:12px}.logo{width:42px;height:42px;border-radius:14px;background:linear-gradient(140deg,#2dd4bf,#0d9488);display:grid;place-items:center;color:#fff;font-size:24px;box-shadow:0 9px 20px #0d948833}.brand b,.brand small{display:block}.brand b{font-size:14px}.brand small{font-size:9px;letter-spacing:1.8px;color:#7b8da7;margin-top:4px}.top-right{display:flex;gap:12px;align-items:center}.saved{font-size:11px;color:#63847e}.wrap{max-width:1300px;padding:0 clamp(16px,4vw,56px);margin:auto}.hero{display:grid;grid-template-columns:1.02fr .98fr;gap:30px;align-items:center;padding:46px 0 30px}.eyebrow{font-size:10px;letter-spacing:1.8px;color:#0b9589;font-weight:900}.hero h1{font-size:clamp(36px,4.4vw,61px);line-height:1.03;letter-spacing:-2.5px;margin:15px 0}.hero h1 em{font-style:normal;color:#0d9488}.hero p{color:var(--muted);font-size:15px;line-height:1.8;max-width:590px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.btn{border:0;border-radius:13px;padding:12px 17px;font-size:13px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:12px;transition:.18s transform,.18s box-shadow}.btn:hover{transform:translateY(-2px)}.primary{color:#fff;background:linear-gradient(135deg,#0fae9f,#087f79);box-shadow:0 10px 22px #0d94882c}.ghost{background:#fff;border:1px solid #dce6f1;color:#526780}.hero-stats{display:flex;gap:30px;margin-top:30px}.hero-stats div{display:grid;gap:3px}.hero-stats b{font-size:22px;letter-spacing:-.6px}.hero-stats span{font-size:11px;color:#7a8ba2}.hero-scene{height:330px;position:relative;overflow:hidden;border-radius:28px;background:radial-gradient(circle at 75% 18%,#4e6ba4,#182b54 48%,#101c3a);box-shadow:0 25px 60px #10234b2b}.sky-orb{position:absolute;width:180px;height:180px;right:18%;top:12%;border-radius:50%;background:radial-gradient(circle,#c5f8e7,#65cfc0 30%,#287f91 68%,transparent 70%);opacity:.8;filter:blur(.3px)}.moon{position:absolute;top:18%;right:23%;font-size:26px;color:#fff}.mountain{position:absolute;bottom:0;width:0;height:0;border-left:180px solid transparent;border-right:180px solid transparent;border-bottom:180px solid #243e67}.m1{left:-35px}.m2{right:-35px;border-bottom-color:#1d3459;border-left-width:220px;border-right-width:220px}.island{position:absolute;width:92px;height:70px;border-radius:42% 50% 32% 38%;background:linear-gradient(155deg,#7ce0c1,#268f88);box-shadow:0 16px 0 #165e68,0 25px 35px #07142c55;display:grid;place-items:center;font-size:31px;border:2px solid #b5ffe6}.island-a{left:13%;bottom:26%}.island-b{left:43%;bottom:39%;background:linear-gradient(145deg,#ffe8a0,#d59a4a);box-shadow:0 16px 0 #875b37,0 25px 35px #07142c55;border-color:#fff0c3}.island-c{right:9%;bottom:23%;background:linear-gradient(145deg,#9bd3ff,#547fd4);box-shadow:0 16px 0 #304d8a,0 25px 35px #07142c55;border-color:#d4e7ff}.bridge{position:absolute;height:5px;background:repeating-linear-gradient(90deg,#f5d89c 0 9px,#966f45 9px 13px);transform:rotate(-20deg);border-radius:9px;box-shadow:0 3px 0 #18294a}.bridge-a{left:28%;bottom:43%;width:105px}.bridge-b{right:25%;bottom:40%;width:110px;transform:rotate(17deg)}.scene-label{position:absolute;bottom:17px;left:0;right:0;text-align:center;font-size:10px;letter-spacing:4px;color:#d2e8ff;font-weight:900}.scene-star{position:absolute;color:#fff5be;font-size:22px;animation:twinkle 2.2s ease-in-out infinite}.star-a{top:17%;left:16%}.star-b{top:35%;right:13%;animation-delay:.8s}@keyframes twinkle{50%{opacity:.3;transform:scale(.8)}}.journey-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:28px 0 18px}.journey-head h2{margin:9px 0;font-size:clamp(22px,2.7vw,32px);letter-spacing:-.8px}.journey-head p{margin:0;color:var(--muted);font-size:13px}.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:#6d7f98}.legend span{display:flex;align-items:center;gap:6px}.dot{width:8px;height:8px;border-radius:50%;display:inline-block}.dot.open{background:#0d9488}.dot.locked{background:#c3cede}.dot.done{background:#e4a72b}.world-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.world-card{border:1px solid var(--line);border-radius:22px;background:#fff;overflow:hidden;box-shadow:var(--shadow)}.world-banner{height:124px;padding:18px;position:relative;display:flex;align-items:end;justify-content:space-between;color:white;overflow:hidden}.world-banner:after{content:"";position:absolute;width:190px;height:190px;border:1px solid #ffffff35;border-radius:50%;right:-35px;top:-85px;box-shadow:0 0 0 22px #ffffff0b,0 0 0 44px #ffffff08}.world-banner.forest{background:linear-gradient(135deg,#146e67,#38b59a)}.world-banner.math{background:linear-gradient(135deg,#343f8e,#6885e7)}.world-banner.lab{background:linear-gradient(135deg,#5d438e,#b37bd9)}.world-symbol{font-size:40px;filter:drop-shadow(0 6px 5px #0002)}.world-banner small{display:block;font-size:9px;letter-spacing:1.6px;opacity:.8;font-weight:900}.world-banner h3{font-size:21px;margin:5px 0 0;letter-spacing:-.5px}.world-status{align-self:flex-start;border:1px solid #ffffff55;background:#ffffff18;border-radius:30px;padding:6px 9px;font-size:10px;font-weight:800;z-index:1}.world-content{padding:17px}.world-content>p{font-size:12px;line-height:1.65;color:#6c7d94;min-height:39px;margin:0 0 14px}.task-list{display:grid;gap:9px}.task-row{display:grid;grid-template-columns:36px 1fr auto;align-items:center;gap:10px;padding:10px;border:1px solid #e7edf5;border-radius:13px;background:#fbfcff}.task-row.locked{opacity:.55;background:#f5f7fa}.task-row.done{border-color:#b9e9dc;background:#f3fcf8}.task-num{width:34px;height:34px;border-radius:11px;background:#e7f5f2;display:grid;place-items:center;color:#087e75;font-weight:900;font-size:12px}.task-row.done .task-num{background:#d7f6e9;color:#087e54}.task-title{font-size:12px;font-weight:850}.task-meta{font-size:10px;color:#8190a5;margin-top:4px}.task-open{border:0;background:#e7f6f3;color:#087e75;border-radius:10px;padding:8px 10px;font-weight:850;font-size:11px}.task-row.locked .task-open{background:#edf0f5;color:#8795a8}.world-foot{display:flex;justify-content:space-between;align-items:center;margin-top:14px;padding-top:13px;border-top:1px solid #edf1f6;font-size:11px;color:#71839b}.world-foot b{color:#263a5a}.teacher-note{margin:24px 0 48px;padding:17px 20px;border:1px solid #dce8f3;background:#ffffffc9;border-radius:18px;display:flex;gap:13px;align-items:start}.note-icon{width:38px;height:38px;border-radius:12px;background:#e7f6f3;color:#0d9488;display:grid;place-items:center;font-size:20px;flex-shrink:0}.teacher-note b{font-size:13px}.teacher-note p{font-size:12px;line-height:1.7;color:#71839b;margin:5px 0}.teacher-note a{font-size:11px;color:#0b9186;font-weight:800}.modal{position:fixed;inset:0;z-index:20;background:#0b1837a8;backdrop-filter:blur(9px);display:grid;place-items:center;padding:16px}.modal[hidden]{display:none}.task-panel{width:min(760px,100%);max-height:min(90vh,900px);overflow:auto;background:#fff;border-radius:25px;box-shadow:0 30px 90px #07132b55;padding:clamp(18px,3vw,30px);display:flex;flex-direction:column}.task-top{display:flex;justify-content:space-between;gap:16px;align-items:start}.task-top h2{font-size:clamp(22px,3vw,31px);margin:8px 0 12px;letter-spacing:-.8px}.close{width:38px;height:38px;border:1px solid #e1e8f1;background:#fff;border-radius:12px;font-size:23px;color:#6e7f97}.task-progress{height:6px;background:#edf1f6;border-radius:20px;overflow:hidden}.task-progress span{height:100%;width:0;display:block;background:linear-gradient(90deg,#2dd4bf,#0d9488);transition:width .25s}.task-body{padding:24px 0 12px;min-height:205px}.prompt-tag{font-size:10px;letter-spacing:1.4px;font-weight:900;color:#0b9589}.task-prompt{font-size:clamp(20px,3vw,28px);line-height:1.35;letter-spacing:-.6px;margin:10px 0 18px}.task-help{font-size:13px;color:#71839b;line-height:1.6}.answer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.answer-option{padding:15px 14px;text-align:left;border:1px solid #dfe7f1;border-radius:14px;background:#fbfcff;color:#243856;font-size:14px;font-weight:750;min-height:54px}.answer-option:hover{border-color:#7dd8c9;background:#f1fcf9}.answer-option.selected{border-color:#0d9488;background:#e9faf6;box-shadow:inset 0 0 0 1px #0d9488}.answer-option.correct{border-color:#36b784;background:#eafaf2}.answer-option.wrong{border-color:#e88c8c;background:#fff0f0}.task-feedback{font-size:13px;line-height:1.6;border-radius:12px}.task-feedback:empty{display:none}.task-feedback.good{padding:12px 14px;background:#ecfaf3;color:#13794d}.task-feedback.bad{padding:12px 14px;background:#fff5e8;color:#8a5b17}.task-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid #edf1f6;padding-top:17px;margin-top:14px}.task-bottom span{font-size:11px;color:#7c8ba1}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#132342;color:#fff;padding:12px 17px;border-radius:12px;font-size:12px;box-shadow:0 12px 30px #101e3b35;transition:.2s;z-index:50}.toast.show{opacity:1;transform:translate(-50%,0)}@media(max-width:900px){.hero{grid-template-columns:1fr}.hero-scene{height:290px}.world-grid{grid-template-columns:1fr 1fr}.world-card:last-child{grid-column:1/-1}}@media(max-width:620px){.top{height:auto;min-height:68px;padding:12px 15px;align-items:flex-start}.top-right{gap:6px;flex-direction:column;align-items:flex-end}.saved{font-size:9px}.top-right .btn{padding:8px 10px;font-size:11px}.hero{padding-top:30px}.hero h1{letter-spacing:-1.5px}.hero-stats{gap:20px}.hero-scene{height:250px}.journey-head{align-items:start;flex-direction:column}.world-grid{grid-template-columns:1fr}.world-card:last-child{grid-column:auto}.world-banner{height:110px}.answer-grid{grid-template-columns:1fr}.task-body{min-height:180px}.task-bottom{align-items:flex-start}.teacher-note{margin-bottom:30px}}