:root{--bg: #0b0f1a;--bg-deep: #05070d;--panel: #141b2e;--panel-light: #1d2942;--accent: #ff5d5d;--accent-glow: #ff8a3d;--combo: #ffb020;--correct: #2ee6a6;--wrong: #ff4d6d;--boss: #b14bff;--text: #f2f6ff;--text-dim: #8a97b8;--timer: #4dd0ff;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}body{height:100dvh;background:var(--bg-deep);color:var(--text);font-family:var(--font);display:flex;justify-content:center;overflow:hidden;-webkit-tap-highlight-color:transparent;overscroll-behavior:none;user-select:none;-webkit-user-select:none}#app{position:relative;width:100%;max-width:460px;height:100dvh;overflow:hidden;background:radial-gradient(120% 60% at 50% 0%,rgba(255,93,93,.08),transparent 60%),linear-gradient(180deg,#0e1426 0%,var(--bg-deep) 100%)}html.host-paused #app{pointer-events:none}.pause-overlay{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;background:#03060db8;color:var(--text);font-size:28px;font-weight:900;letter-spacing:4px;pointer-events:auto}.pause-overlay[hidden]{display:none}.screen{position:absolute;inset:0;display:flex;flex-direction:column;gap:10px;padding:calc(env(safe-area-inset-top) + 14px) 18px calc(env(safe-area-inset-bottom) + 14px)}.screen.learn{background:radial-gradient(120% 60% at 50% 0%,rgba(77,208,255,.1),transparent 60%)}.screen.boss{background:radial-gradient(120% 60% at 50% 0%,rgba(177,75,255,.16),transparent 60%)}.screen.over{overflow-y:auto;-webkit-overflow-scrolling:touch;background:radial-gradient(120% 60% at 50% 0%,rgba(255,77,109,.14),transparent 60%)}.spacer{flex:1 1 auto}.topbar{display:flex;align-items:center;justify-content:space-between;min-height:34px}.topbar .left,.topbar .right{display:flex;align-items:center;gap:8px}.hearts{font-size:24px;letter-spacing:2px}.score{font-size:19px;font-weight:700}.mode-tag{font-size:20px;font-weight:700;color:var(--timer)}.icon-btn{background:none;border:none;color:var(--text);font-size:26px;line-height:1;padding:8px;cursor:pointer;border-radius:12px}.icon-btn:active{transform:scale(.92)}.combo{min-height:30px;text-align:center;font-size:24px;font-weight:800;color:var(--combo)}.combo.pulse{animation:comboPulse .26s ease-out}.combo.milestone{animation:comboPulse .32s ease-out}.qnum{text-align:center;font-size:15px;font-weight:700;letter-spacing:1px;color:var(--text-dim)}.question{text-align:center;font-size:26px;font-weight:800;line-height:1.3;padding:0 4px}.feedback{min-height:34px;text-align:center;font-size:26px;font-weight:800}.feedback.good{color:var(--correct)}.feedback.bad{color:var(--wrong)}.hint{min-height:46px;text-align:center;font-size:16px;line-height:1.45;color:var(--text);white-space:pre-line}.answers{display:flex;flex-direction:column;gap:14px;position:relative}.answer{width:100%;min-height:66px;padding:12px 16px;border-radius:18px;border:2px solid var(--panel);background:var(--panel-light);color:var(--text);font-family:var(--font);font-size:23px;font-weight:700;cursor:pointer;transition:transform .06s ease,background .12s ease,border-color .12s ease,opacity .12s ease}.answer:active{transform:scale(.97)}.answer:disabled{cursor:default}.answer.correct{background:var(--correct);border-color:var(--correct);color:#052b1e}.answer.wrong{background:var(--wrong);border-color:var(--wrong);color:#2b0510}.answer.dim{opacity:.5}.timer{display:flex;align-items:center;gap:12px}.timerbar{flex:1 1 auto;height:16px;background:var(--panel);border-radius:8px;overflow:hidden}.timerfill{height:100%;width:100%;background:var(--timer);border-radius:8px}.time{min-width:54px;text-align:right;font-size:18px;font-weight:700;color:var(--timer)}.timer.urgent .timerfill{background:var(--wrong)}.timer.urgent .time{color:var(--wrong)}.time.beep{animation:beepPulse .18s ease-out}.btn{width:100%;min-height:62px;border:none;border-radius:20px;font-family:var(--font);font-size:22px;font-weight:800;cursor:pointer;color:#2b0510;transition:transform .07s ease}.btn:active{transform:scale(.96)}.btn.accent{background:var(--accent);color:#2b0510}.btn.info{background:var(--timer);color:#03202b}.btn.ghost{background:var(--panel-light);color:var(--text)}.btn.next{align-self:center;width:auto;min-width:200px;padding:0 28px;background:var(--timer);color:#03202b;animation:breathe 1.2s ease-in-out infinite}.auto-btn{flex-shrink:0;background:transparent;border:2px solid var(--panel-light);color:var(--text-dim);font-size:11px;font-weight:800;letter-spacing:.5px;line-height:1.15;padding:5px 8px;border-radius:10px;cursor:pointer;white-space:pre-line;text-align:center}.auto-btn.on{border-color:var(--timer);color:var(--timer);background:color-mix(in srgb,var(--timer) 16%,transparent)}.auto-btn:active{transform:scale(.94)}.audio-controls{display:inline-flex;align-items:center;gap:2px}.modal-backdrop{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;background:#03060db8;backdrop-filter:blur(2px)}.modal-panel{width:min(100%,340px);display:flex;flex-direction:column;gap:16px;padding:22px;border-radius:22px;background:var(--panel);border:1px solid var(--panel-light);box-shadow:0 18px 50px #00000080}.modal-title{text-align:center;font-size:15px;letter-spacing:2px;color:var(--text-dim)}.slider-row{display:flex;align-items:center;gap:12px}.slider-label{flex:0 0 84px;font-size:15px;font-weight:700}.slider{flex:1 1 auto;height:26px;accent-color:var(--timer);cursor:pointer}.slider-val{flex:0 0 34px;text-align:right;font-size:14px;font-weight:700;color:var(--text-dim)}.title{text-align:center;font-size:46px;font-weight:900;line-height:1.02;margin-top:10px}.title .s{color:var(--accent);text-shadow:0 0 18px rgba(255,138,61,.5)}.tagline{text-align:center;font-style:italic;color:var(--text-dim);font-size:15px}.tap-hint{min-height:18px;text-align:center;font-size:13px;font-weight:700;letter-spacing:.3px;color:var(--timer)}.block{text-align:center;display:flex;flex-direction:column;gap:6px}.block h2{font-size:25px}.block p{color:var(--text-dim);font-size:14px}.best{text-align:center;color:var(--combo);font-weight:700;font-size:15px;min-height:18px}.head{text-align:center}.head .k{color:var(--text-dim);font-weight:700;font-size:22px}.head .b{font-size:38px;font-weight:900}.card{width:100%;text-align:center;border:3px solid var(--panel);background:var(--panel);color:var(--text);border-radius:20px;padding:16px;cursor:pointer;display:flex;flex-direction:column;gap:4px;transition:transform .08s ease}.card:active{transform:scale(.97)}.card .c-title{font-size:24px;font-weight:800}.card .c-time{font-size:19px;font-weight:700;color:var(--text)}.card .c-desc{color:var(--text-dim);font-size:15px}.gameover-title{text-align:center;font-size:38px;font-weight:900}.newbest{text-align:center;color:var(--combo);font-weight:800;font-size:18px;min-height:20px}.stat{text-align:center}.stat .l{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--text-dim)}.stat .v{font-size:27px;font-weight:800}.buttons{display:flex;flex-direction:column;gap:12px;flex-shrink:0;padding-bottom:8px}.boss-intro{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:20;pointer-events:none}.boss-title{font-size:38px;font-weight:900;color:var(--boss);text-shadow:0 0 22px rgba(122,31,255,.7);animation:bossZoom .65s ease-out both}.boss-label{text-align:center;color:var(--boss);font-weight:800;font-size:22px}.float{position:absolute;left:50%;transform:translate(-50%);top:-6px;font-size:32px;font-weight:900;color:var(--combo);pointer-events:none;animation:floatUp .7s ease-out forwards}@keyframes comboPulse{0%{transform:scale(1)}50%{transform:scale(1.4)}to{transform:scale(1)}}@keyframes beepPulse{0%{transform:scale(1)}50%{transform:scale(1.5)}to{transform:scale(1)}}@keyframes floatUp{0%{transform:translate(-50%);opacity:1}to{transform:translate(-50%,-80px);opacity:0}}@keyframes bossZoom{0%{transform:scale(.2);opacity:0}60%{transform:scale(1.12);opacity:1}to{transform:scale(1);opacity:1}}@keyframes breathe{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(7px)}60%{transform:translate(-5px)}80%{transform:translate(4px)}}.shake{animation:shake .25s ease-in-out}@media(prefers-reduced-motion:reduce){*{animation-duration:1ms!important}}