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#app{height:var(--app-height);min-height:var(--app-height);max-height:var(--app-height);overflow:hidden;overscroll-behavior:none}button,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.page{height:var(--app-height, 100dvh);min-height:var(--app-height, 100dvh);max-height:var(--app-height, 100dvh);overflow:hidden;display:flex;flex-direction:column;background:var(--bg);box-sizing:border-box;padding-top:var(--safe-top)}.shell-main{flex:1;min-height:0;overflow:auto}.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 12px 8px;gap:8px;flex-shrink:0}.stat{display:flex;align-items:center;gap:6px;font-weight:800;font-size:15px}.stat.gold{color:var(--gold)}.stat.green{color:var(--green)}.stat.blue{color:var(--blue)}.tabbar{position:relative;z-index:20;flex-shrink:0;display:grid;grid-template-columns:repeat(5,1fr);gap:6px;background:#131f24;border-top:1px solid var(--line);padding:10px 12px calc(12px + var(--safe-bottom))}.tab{background:transparent;border:3px solid transparent;color:var(--muted);display:grid;place-items:center;min-height:56px;padding:4px 0;border-radius:18px}.tab.active{background:transparent;border-color:var(--green)}.tab .tab-icon{opacity:.78}.tab.active .tab-icon{opacity:1}html.standalone .page{padding-bottom:0}html.standalone .tabbar{position:fixed;left:0;right:0;bottom:0;padding:6px 12px 0;padding-bottom:var(--safe-bottom);background:#131f24}html.standalone .tab{min-height:48px}html.standalone .shell-main{padding-bottom:calc(var(--tabbar-height) + var(--safe-bottom))}html.standalone .install-tip{margin-bottom:calc(var(--tabbar-height) + var(--safe-bottom) + 4px)}.unit-header-wrap{position:sticky;top:0;z-index:30;padding:8px 16px 12px;background:var(--bg)}.unit-header{margin:0;background:var(--green);color:#fff;border-radius:18px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;box-shadow:0 4px 0 var(--green-dark)}.unit-header h1{margin:0;font-size:22px;line-height:1.15}.unit-header .kicker{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;opacity:.8}.unit-header .kicker-btn{display:inline-flex;align-items:center;margin:0 0 4px;padding:0;border:0;background:transparent;color:inherit;font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;opacity:.9}.unit-header .section-card-btn{flex:1;min-width:0;border:0;background:transparent;color:inherit;text-align:left;padding:0}.unit-header .section-card-btn h1{margin:0;font-size:22px;line-height:1.15}.guide-btn{border:2px solid rgba(0,0,0,.2);background:#ffffff2e;color:inherit;border-radius:14px;padding:10px 12px;font-weight:800;font-size:12px;letter-spacing:.04em;white-space:nowrap}.path{padding:38px 0 56px;display:flex;flex-direction:column;align-items:center}.path-item{position:relative;width:220px;display:flex;justify-content:center;margin:14px 0}.node{width:68px;height:62px;border-radius:50%;border:0;display:grid;place-items:center;font-size:28px;position:relative;box-shadow:0 7px #2c3e46;background:#2b3d44;color:#52656d}.node.locked{background:#2b3d44;color:#52656d;box-shadow:0 7px #1b2a2f}.node.complete{background:var(--gold);color:#7a5b00;box-shadow:0 7px #c79b00}.node.current{background:var(--green);color:#fff;box-shadow:0 7px 0 var(--green-dark)}.node.chest.current,.node.chest.complete{border-radius:16px;width:72px}.node.trophy.current{background:var(--gold);box-shadow:0 7px #c79b00}.path-bubble{position:absolute;top:-48px;left:50%;z-index:2;background:var(--bg);color:var(--green);border:2px solid var(--line);border-radius:14px;padding:7px 14px;font-size:15px;font-weight:900;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;pointer-events:none;transform:translate(-50%);animation:path-bubble-bob 1.5s ease-in-out infinite}.path-bubble:before{content:"";position:absolute;left:50%;top:100%;transform:translate(-50%);border-left:9px solid transparent;border-right:9px solid transparent;border-top:9px solid var(--line)}.path-bubble:after{content:"";position:absolute;left:50%;top:calc(100% - 2px);transform:translate(-50%);border-left:7px solid transparent;border-right:7px solid transparent;border-top:7px solid var(--bg)}@keyframes path-bubble-bob{0%,to{transform:translate(-50%)}50%{transform:translate(-50%,-5px)}}.path-mascot{position:absolute;right:-80px;top:4px;width:72px;height:72px}.unit-split{width:min(360px,92vw);display:flex;align-items:center;gap:10px;color:var(--muted);font-weight:800;margin:28px 0 0;font-size:14px}.unit-split:before,.unit-split:after{content:"";flex:1;height:2px;background:var(--line)}.jump{width:68px;height:62px;border-radius:50%;border:0;background:var(--purple);color:#fff;box-shadow:0 7px #a45ad4;font-size:22px}.jump-wrap{position:relative;display:flex;flex-direction:column;align-items:center;margin:52px 0 28px}.jump-wrap .path-bubble{color:var(--purple)}.card{background:var(--bg-2);border:2px solid var(--line);border-radius:var(--radius);padding:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:16px;padding:14px 18px;font-weight:800;letter-spacing:.04em;text-transform:uppercase}.btn.green{background:var(--green);color:#fff;box-shadow:0 4px 0 var(--green-dark)}.btn.blue{background:var(--blue);color:#042433;box-shadow:0 4px #0e8fc9;gap:8px}.btn.ghost{background:transparent;color:var(--muted);border:2px solid var(--line);box-shadow:none}.btn:active{transform:translateY(2px);box-shadow:0 2px 0 var(--green-dark)}.btn.wide{width:100%}.search-box{width:100%;background:var(--bg-2);border:2px solid var(--line);color:var(--text);border-radius:16px;padding:14px 16px;outline:none}.search-box:focus{border-color:var(--blue)}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.topic-card,.word-tile,.scene-card{background:var(--bg-2);border:2px solid var(--line);border-radius:18px;padding:14px;text-align:left;color:var(--text)}.topic-card .emoji,.word-tile .emoji{font-size:36px}.topic-card h3,.word-tile h3{margin:8px 0 2px;font-size:16px}.word-tile,.topic-card,.scene-card{cursor:pointer}.muted{color:var(--muted);font-size:13px}.letters{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}.letter{min-width:36px;height:44px;display:grid;place-items:center;background:var(--bg-3);border-radius:10px;font-weight:900;text-transform:uppercase}.choice{background:var(--bg-2);border:2px solid var(--line);color:var(--text);border-radius:16px;padding:14px;font-weight:800}.choice.selected{border-color:var(--blue)}.choice.correct{border-color:var(--green);background:#24163f}.choice.wrong{border-color:var(--red);background:#3a1818}.chip{background:var(--bg-3);border:2px solid var(--line);color:var(--text);border-radius:14px;padding:10px 12px;font-weight:800}.chip.used{opacity:.3}.progress-bar{height:14px;background:var(--line);border-radius:99px;overflow:hidden}.progress-bar>span{display:block;height:100%;background:var(--green)}.mic{width:84px;height:84px;border-radius:50%;border:0;background:var(--blue);color:#fff;font-size:32px;box-shadow:0 6px #0e8fc9}.mic.listening{background:var(--red);box-shadow:0 6px #c33737}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:grid;place-items:end}.sheet{width:100%;background:var(--bg-2);border-radius:20px 20px 0 0;padding:18px 18px calc(18px + var(--safe-bottom));border-top:2px solid var(--line)}.example{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 0;border-bottom:1px solid var(--line)}.example:last-child{border-bottom:0}.icon-btn{background:var(--bg-3);border:2px solid var(--line);color:var(--text);border-radius:12px;width:40px;height:40px}.nav-back{background:none;border:0;color:var(--text);font-size:22px;padding:8px}.lesson-footer{margin-top:auto;padding:12px 16px calc(16px + var(--safe-bottom))}.score-pill{display:inline-block;padding:6px 12px;border-radius:99px;font-weight:900}.score-pill.great{background:#24163f;color:var(--green)}.score-pill.almost{background:#3a3008;color:var(--gold)}.score-pill.try{background:#3a1818;color:var(--red)}.turn{max-width:80%;padding:10px 12px;border-radius:14px;margin:8px 0}.turn.ai{background:var(--bg-3)}.turn.me{background:#163347;margin-left:auto}