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0;border:none}.seg-btn+.seg-btn{border-left:1px solid oklch(45% .05 268/.25)}.seg-btn:hover{color:var(--text);background:oklch(100% 0 0/.04)}.seg-btn.active{color:var(--bg);background:var(--accent-2);font-weight:700}.seg-btn:focus-visible{outline-offset:-2px;z-index:1}.countdown-track{border-radius:var(--radius-pill);height:18px;margin:var(--space-3) 0 var(--space-1);background:oklch(45% .05 268/.14);position:relative;overflow:hidden}.countdown-fill{background:linear-gradient(90deg, var(--accent-2), var(--bull));height:100%;transition:width .1s linear}.countdown-fill.danger{background:linear-gradient(90deg, oklch(75% .18 50), var(--bear))}.countdown-label{font-size:var(--text-xs);color:var(--text);letter-spacing:.1em;font-variant-numeric:tabular-nums;place-items:center;display:grid;position:absolute;inset:0}.quiz-card{padding:var(--space-7);margin-bottom:var(--space-5);border-radius:var(--radius-xl)}.quiz-card 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var(--panel-border);width:1.5rem;height:1.5rem;font-size:var(--text-xs);color:var(--text-dim);background:oklch(100% 0 0/.06);flex:none;justify-content:center;align-items:center;margin-top:1px;display:inline-flex}.q-option.correct .q-option-key{border-color:var(--bull);color:var(--bull)}.q-option.wrong .q-option-key{border-color:var(--bear);color:var(--bear)}.q-option:hover{border-color:var(--accent);background:oklch(59.9% .23 286.2/.08);transform:translate(3px)}.q-option.correct{border-color:var(--bull);box-shadow:var(--glow-bull);background:oklch(88.1% .205 158.3/.1)}.q-option.wrong{border-color:var(--bear);background:oklch(66.3% .229 12.6/.1)}.q-option.disabled{pointer-events:none}.q-explain{margin-top:var(--space-5);padding:var(--space-5);border-radius:var(--radius-md);border-inline-start:3px solid var(--accent);font-size:var(--text-base);line-height:var(--leading-loose);color:var(--text);max-width:var(--measure);text-wrap:pretty;background:oklch(59.9% .23 286.2/.1)}.q-explain .label{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin-bottom:var(--space-2);display:block}.debrief-hero{text-align:center;padding:var(--space-8) 0 var(--space-2)}.debrief-hero .stars{letter-spacing:.5rem;margin-bottom:var(--space-3);font-variant-numeric:tabular-nums;font-size:2.5rem}.debrief-hero h2{font-size:var(--text-2xl);text-wrap:balance;font-weight:900}.debrief-hero .acc{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--text-dim);margin-top:var(--space-2)}.debrief-section{margin-top:var(--space-8)}.debrief-section>h3{font-size:var(--text-sm);font-family:var(--font-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--accent-2);margin-bottom:var(--space-4)}.debrief-section ul{max-width:var(--measure);list-style:none}.debrief-section li{padding:var(--space-3) 0 var(--space-3) var(--space-7);font-size:var(--text-base);line-height:var(--leading-loose);text-wrap:pretty;position:relative}.debrief-section li:before{content:"▸";left:var(--space-1);color:var(--bull);position:absolute}.formula-box{font-family:var(--font-mono);border-radius:var(--radius-md);padding:var(--space-5) var(--space-6);font-size:var(--text-base);color:var(--accent-2);background:oklch(79.7% .147 221.3/.07);border:1px solid oklch(79.7% .147 221.3/.28);line-height:2;overflow-x:auto}.signal-card{padding:var(--space-6);margin-bottom:var(--space-5);border-radius:var(--radius-lg)}.signal-card h4{font-size:var(--text-lg);margin-bottom:var(--space-2);color:var(--gold);font-family:var(--font-display);text-wrap:balance}.signal-card>p{font-size:var(--text-base);color:var(--text-dim);line-height:var(--leading-loose);margin-bottom:var(--space-3);max-width:var(--measure);text-wrap:pretty}.level-actions{gap:var(--space-4);margin-top:var(--space-9);flex-wrap:wrap;justify-content:center;display:flex}.reflex-hud{margin-bottom:var(--space-5);justify-content:space-between;align-items:stretch;gap:var(--space-4);flex-wrap:wrap;display:flex}.reflex-hud .hud-item{font-family:var(--font-mono);font-size:var(--text-sm);color:var(--text-dim);letter-spacing:.04em;min-width:4.5rem;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);border:1px solid var(--panel-border);background:oklch(18% .025 268/.55);flex:auto}.reflex-hud .hud-item b{font-size:var(--text-2xl);color:var(--text);font-variant-numeric:tabular-nums;line-height:var(--leading-tight);margin-top:var(--space-1);display:block}.reflex-hud .hud-item.combo b{color:var(--gold);text-shadow:0 0 16px oklch(85.8% .154 84.4/.45)}.timer-bar{height:8px;margin-bottom:var(--space-5);background:oklch(45% .05 268/.22);border-radius:4px;overflow:hidden}.timer-bar .fill{background:linear-gradient(90deg, var(--bull), var(--accent-2));height:100%;transition:width .1s linear}.timer-bar .fill.danger{background:linear-gradient(90deg, var(--bear), oklch(75% .18 50))}.reflex-question{text-align:center;font-size:var(--text-xl);margin:var(--space-5) 0;text-wrap:balance;font-weight:900;line-height:var(--leading-snug)}.reflex-answers{gap:var(--space-3);margin-top:var(--space-5);grid-template-columns:repeat(auto-fit,minmax(min(100%,140px),1fr));display:grid}.reflex-answers .btn{padding:var(--space-5) var(--space-3);font-size:var(--text-md);min-height:52px}.reflex-result{text-align:center;padding:var(--space-10) 0}.reflex-result .big-score{font-family:var(--font-mono);font-variant-numeric:tabular-nums;background:linear-gradient(120deg, var(--bull), var(--accent-2));color:#0000;-webkit-background-clip:text;background-clip:text;font-size:clamp(3rem,12vw,4.5rem);font-weight:700;line-height:1}.reflex-result>p{max-width:min(var(--measure), 36rem);text-wrap:pretty;margin-inline:auto}.feedback-flash{pointer-events:none;z-index:50;opacity:0;position:fixed;inset:0}.feedback-flash.good{background:radial-gradient(#0000 40%,oklch(88.1% .205 158.3/.18))}.feedback-flash.bad{background:radial-gradient(#0000 40%,oklch(66.3% .229 12.6/.22))}@media (prefers-reduced-motion:no-preference){.feedback-flash.good,.feedback-flash.bad{animation:.4s flash}}@keyframes flash{0%{opacity:0}30%{opacity:1}to{opacity:0}}.level-list{gap:var(--space-3);flex-direction:column;display:flex}.level-row{align-items:center;gap:var(--space-5);padding:var(--space-5) var(--space-6);border-radius:var(--radius-lg);transition:transform var(--duration-med) var(--ease-out), border-color var(--duration-med) var(--ease-out), box-shadow var(--duration-med) var(--ease-out);min-height:72px;display:flex}.level-row:hover{border-color:var(--ch-color);box-shadow:0 6px 28px -10px var(--ch-color);transform:translate(4px)}.level-no{font-size:var(--text-xl);color:var(--ch-color);opacity:.85;font-variant-numeric:tabular-nums;min-width:2.5rem;font-weight:700}.level-info{flex:1;min-width:0}.level-info h2,.level-info h3{font-size:var(--text-base);font-family:var(--font-body);margin-bottom:var(--space-1);font-weight:700;line-height:var(--leading-snug)}.level-meta{font-size:var(--text-xs);color:var(--text-dim);font-variant-numeric:tabular-nums}.level-stars{font-size:var(--text-lg);letter-spacing:3px;flex-shrink:0}.topbar nav .badge{border-radius:var(--radius-pill);background:var(--bear);color:#fff;min-width:18px;min-height:18px;font-size:11px;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:center;justify-content:center;align-items:center;margin-inline-start:6px;padding:1px 6px;font-weight:700;display:inline-flex}.home-progress{max-width:280px;height:6px;margin:var(--space-5) auto 0;border-radius:var(--radius-pill);background:oklch(45% .05 268/.22);overflow:hidden}.home-progress-fill{border-radius:inherit;background:linear-gradient(90deg, var(--accent), var(--accent-2));height:100%;transition:width var(--duration-med) var(--ease-out)}.stat-strip{justify-content:center;gap:var(--space-4) var(--space-8);margin-top:var(--space-7);font-size:var(--text-sm);color:var(--text-dim);flex-wrap:wrap;display:flex}.stat-strip span{align-items:center;gap:var(--space-1);flex-direction:column;min-width:4.5rem;display:inline-flex}.stat-strip b{font-size:var(--text-lg);color:var(--text);font-variant-numeric:tabular-nums;font-weight:700}.mute-btn{font-size:var(--text-md);min-width:40px;min-height:40px;padding:var(--space-2);border-radius:var(--radius-sm);opacity:.8;transition:opacity var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);justify-content:center;align-items:center;display:inline-flex}.mute-btn:hover{opacity:1;background:oklch(59.9% .23 286.2/.14)}.empty-state{text-align:center;padding:var(--space-10) var(--space-4)}.empty-state .empty-icon{margin-bottom:var(--space-4);color:var(--accent-2);font-size:2.5rem;line-height:1}.empty-state h2{font-size:var(--text-xl);margin-bottom:var(--space-3)}.empty-state p{color:var(--text-dim);max-width:28rem;line-height:var(--leading-loose);text-wrap:pretty;margin-inline:auto}.live-region{clip:rect(0, 0, 0, 0);width:1px;height:1px;position:absolute;overflow:hidden}@media (width<=640px){.page{padding:0 var(--space-4) var(--space-11);padding-inline:max(var(--space-4), env(safe-area-inset-left,0px)) max(var(--space-4), env(safe-area-inset-right,0px));padding-bottom:max(var(--space-11), env(safe-area-inset-bottom,0px))}.hero{padding:var(--space-8) 0 var(--space-6)}.hero h1{max-width:100%;font-size:clamp(1.75rem,9vw,2.5rem)}.topbar .logo{font-size:var(--text-md);letter-spacing:.03em}.topbar{margin-bottom:var(--space-4);row-gap:var(--space-2)}.topbar nav{justify-content:flex-start;gap:var(--space-1);width:100%}.topbar nav a{padding:var(--space-2) var(--space-3);font-size:var(--text-xs);min-height:40px}.quiz-card{padding:var(--space-5)}.level-row{padding:var(--space-4);gap:var(--space-3)}.reflex-hud .hud-item b{font-size:var(--text-xl)}.mode-card{padding:var(--space-6) var(--space-5)}.reflex-answers[style*=repeat\(3]{grid-template-columns:1fr!important}.level-actions{flex-direction:column;align-items:stretch}.level-actions .btn{width:100%}}@media (width<=400px){.stat-strip{gap:var(--space-4) var(--space-5)}.reflex-answers{grid-template-columns:1fr}}