:root{--bg: #0a0e27;--surface: #131736;--surface-2: #1b2147;--accent: #00c9a7;--accent-dim: #0a8a76;--text: #e4e7f1;--text-dim: #8a91b8;--danger: #ff5757;--warning: #ffb830;--border: #2a3166;--radius: 14px;--radius-sm: 8px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .25);--shadow-md: 0 8px 24px rgba(0, 0, 0, .35);--font-ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-num: "SF Mono", ui-monospace, "Roboto Mono", monospace;--ease: cubic-bezier(.22, 1, .36, 1);--press-scale: .96;--t-fast: .12s;--t-base: .2s}.fk-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}.fk-btn{appearance:none;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:var(--radius-sm);padding:var(--space-3) var(--space-4);font-family:var(--font-ui);font-weight:600;cursor:pointer;transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}.fk-btn:active{transform:scale(var(--press-scale))}.fk-btn--primary{background:var(--accent);border-color:var(--accent);color:#03150f}.fk-btn--primary:active{background:var(--accent-dim)}@media (prefers-reduced-motion: reduce){.fk-btn{transition:none}}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100dvh;background:#04060f;color:var(--text);font-family:system-ui,sans-serif;font-variant-numeric:tabular-nums;overflow:hidden;touch-action:none;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}#app{display:flex;align-items:center;justify-content:center;height:100dvh}#stage{position:relative}#stage canvas{position:absolute;inset:0;display:block}#bg{z-index:0}#game{z-index:1}.overlay{position:absolute;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;background:#04060fb8;backdrop-filter:blur(4px);opacity:1;transition:opacity .25s ease}.overlay.hidden{opacity:0;pointer-events:none}.panel{background:var(--surface, #11162e);border:1px solid var(--border, #232a4d);border-radius:var(--radius, 14px);padding:30px 44px 26px;text-align:center;box-shadow:0 18px 50px #0000008c}.ov-label{color:var(--text-dim, #8b93b5);font:600 13px system-ui,sans-serif;letter-spacing:.12em;margin-bottom:8px}.ov-score{color:var(--text, #e7ecf7);font:700 52px ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums;line-height:1.1}.ov-best{color:var(--text-dim, #8b93b5);font:700 15px ui-monospace,monospace;margin:10px 0 22px}.ov-best.newbest{color:var(--accent, #00c9a7)}#retry{background:var(--accent, #00c9a7);color:#04241d;border:none;border-radius:var(--radius-sm, 8px);font:700 17px system-ui,sans-serif;padding:13px 36px;cursor:pointer;transition:transform .08s ease}#retry:active{transform:scale(.94)}@media (prefers-reduced-motion: reduce){.overlay{transition:none}}