:root{--bg:#fbfaf6;--paper:#fffefb;--ink:#151515;--muted:#6d6b66;--line:#e6e0d7;--blue:#2f84de;--green:#4a9d62;--red:#d84a43;--gold:#c58a21;--shadow:0 22px 60px #1f1c1717}*{box-sizing:border-box}html{background:var(--bg);min-height:100%;color:var(--ink)}body{background:linear-gradient(#fffffff5,#faf7eff5),repeating-linear-gradient(90deg,#15151506 0 1px,#0000 1px 72px);min-height:100vh;margin:0;font-family:Avenir Next,Hiragino Sans,Hiragino Kaku Gothic ProN,PingFang SC,Noto Sans SC,sans-serif;overflow-x:hidden}button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;border:0}button:disabled{cursor:default}h1,h2,p{margin:0}.app-shell{width:min(1120px,100% - 24px);min-height:100vh;padding:max(14px, env(safe-area-inset-top)) 0 calc(116px + env(safe-area-inset-bottom));margin:0 auto}.topbar{justify-content:space-between;align-items:flex-start;gap:16px;padding:6px 0 8px;display:flex}.app-mark{color:#47413b;letter-spacing:.08em;background:#fff;border:1px solid #ded6c8;border-radius:999px;margin-bottom:6px;padding:6px 10px;font-size:12px;font-weight:900;display:inline-flex}.topbar h1{letter-spacing:0;font-size:clamp(30px,7vw,54px);line-height:1}.icon-button{border:1px solid var(--line);background:#fff;border-radius:14px;width:44px;height:44px;font-size:24px;box-shadow:0 8px 18px #1f1c170f}.hud{z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:linear-gradient(#fbfaf6fa,#fbfaf6e0);padding:10px 0 12px;position:sticky;top:0}.timer{background:#dedbd5;border-radius:999px;height:10px;overflow:hidden}.timer-fill{transform-origin:0;background:var(--blue);width:100%;height:100%;transition:transform 90ms linear}.hud-row,.clear-row,.mode-row{align-items:center;gap:10px;display:grid}.hud-row{grid-template-columns:repeat(3,1fr);margin-top:12px}.hud-row span,.clear-row,.mode-row button{background:#fffdf8;border:1px solid #e4dbcfe6;border-radius:999px;min-width:0;font-weight:900;box-shadow:0 8px 18px #1f1c170a}.hud-row span{justify-content:center;padding:10px 6px;font-size:clamp(16px,4vw,24px);display:flex}.clear-row{grid-template-columns:minmax(0,1fr) auto auto;margin-top:10px;padding:10px 12px}.clear-row span{color:var(--accent);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.clear-row em{color:var(--muted);font-style:normal}.scene-strip{scrollbar-width:none;grid-auto-columns:minmax(168px,1fr);grid-auto-flow:column;gap:10px;margin:10px -12px 12px;padding:0 12px 8px;display:grid;overflow-x:auto}.scene-strip::-webkit-scrollbar{display:none}.scene-chip{text-align:left;border:1px solid var(--line);background:#fff;border-radius:14px;gap:5px;min-height:72px;padding:12px;display:grid;box-shadow:0 8px 18px #1f1c170a}.scene-chip strong{color:var(--accent);font-size:16px}.scene-chip span{color:var(--muted);font-size:12px;font-weight:800}.scene-chip.is-selected{border-color:color-mix(in srgb, var(--accent), #fff 38%);background:color-mix(in srgb, var(--accent), #fff 90%);box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--accent), #fff 54%)}.mode-row{grid-template-columns:1fr 1fr 1fr;margin:0 0 14px}.mode-row button{color:#4a4640;min-height:46px;padding:0 10px;font-size:clamp(13px,3.2vw,16px)}.mode-row button.active{color:#fff;background:#1e1e1e;border-color:#1e1e1e}.mode-row button.danger.active{background:var(--red);border-color:var(--red)}.game-card{border:1px solid var(--line);background:var(--paper);min-height:clamp(320px,44vh,520px);box-shadow:var(--shadow);text-align:center;border-radius:20px;place-items:center;margin-bottom:96px;padding:clamp(20px,5vw,44px);display:grid;position:relative}.question-label{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:999px;place-self:start;padding:7px 10px;font-size:12px;font-weight:900}.jp-word{overflow-wrap:anywhere;text-wrap:balance;letter-spacing:0;max-width:100%;margin-top:14px;font-size:clamp(42px,9vw,96px);font-weight:950;line-height:1.05}.reading{color:var(--muted);margin-top:-8px;font-size:clamp(16px,4vw,24px);font-weight:800}.arrow{color:#77736d;font-size:clamp(34px,8vw,54px);line-height:1}.zh-meaning,.zh-prompt{overflow-wrap:anywhere;max-width:100%;font-size:clamp(34px,8vw,64px);font-weight:950;line-height:1.12}.sentence-card{align-content:start;gap:20px}.sentence-slots,.token-pool{flex-wrap:wrap;justify-content:center;gap:10px;width:100%;display:flex}.sentence-slots span{background:#faf7f0;border:2px dashed #d4cbbd;border-radius:12px;justify-content:center;align-items:center;min-width:72px;min-height:48px;padding:8px 12px;font-size:clamp(18px,4.4vw,28px);font-weight:900;display:inline-flex}.token{background:#fff;border:1px solid #d8d1c6;border-radius:12px;min-height:50px;padding:9px 14px;font-size:clamp(18px,4.4vw,28px);font-weight:900;box-shadow:0 9px 20px #1f1c1714}.token:disabled{color:#0000;box-shadow:none;background:#ede8df}.feedback{text-align:left;color:#fff;border-radius:16px;gap:6px;max-width:min(420px,100% - 28px);padding:14px 16px;display:grid;position:absolute;bottom:clamp(14px,4vw,30px);right:clamp(14px,4vw,30px);box-shadow:0 16px 34px #1f1c172e}.feedback.ok{background:var(--green)}.feedback.bad{background:var(--red)}.feedback strong{font-size:20px}.feedback span{font-weight:800;line-height:1.45}.answer-bar{left:max(12px, env(safe-area-inset-left));right:max(12px, env(safe-area-inset-right));bottom:max(12px, env(safe-area-inset-bottom));z-index:20;gap:10px;max-width:1120px;margin:0 auto;display:grid;position:fixed}.answer-bar.two,.sentence-actions{grid-template-columns:1fr 1fr}.answer{color:#fff;border:1px solid #1f1c1729;border-radius:16px;min-height:74px;font-size:clamp(24px,6vw,42px);font-weight:950;box-shadow:0 18px 38px #1f1c1724}.answer.yes{background:var(--green)}.answer.no{background:var(--red)}.answer.ghost{color:#1b1b1b;background:#fff}.mistake-panel{border:1px solid var(--line);background:#fffdf8;border-radius:18px;gap:8px;margin-top:14px;padding:14px;display:grid}.mistake-panel.empty{color:var(--muted);font-weight:800}.mistake-panel h2{font-size:18px}.mistake-panel p{border-top:1px solid #eee6da;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px;padding:9px 0;display:grid}.mistake-panel strong,.mistake-panel span{overflow-wrap:anywhere;min-width:0;line-height:1.35}.mistake-panel span{color:var(--muted);font-weight:800}@media (width<=720px){.app-shell{width:min(100% - 16px,1120px)}.topbar h1{font-size:clamp(34px,11vw,48px)}.hud-row span{padding:9px 4px}.mode-row{grid-template-columns:1fr}.game-card{border-radius:18px;min-height:46vh;margin-bottom:88px}.answer{min-height:68px}.feedback{width:100%;margin-top:8px;position:static}}