: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:var(--bg);color:var(--text);font-family:var(--font-ui, system-ui, sans-serif);font-variant-numeric:tabular-nums;overflow:hidden;touch-action:none;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}#app{width:100%;max-width:520px;height:100dvh;margin:0 auto;display:flex;flex-direction:column;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}#hud{display:flex;align-items:center;justify-content:space-between;padding:12px 16px 6px;gap:8px}.hud-left{display:flex;align-items:baseline;gap:8px;flex:1}#scoreVal{font-size:30px;font-weight:800;letter-spacing:-.5px;color:var(--text)}.hud-sub{font-size:17px;font-weight:700;color:var(--accent);min-width:38px}.hud-mid{flex:0 0 auto}#timeVal{font-size:20px;font-weight:700;color:var(--text-dim)}.hud-right{display:flex;align-items:center;gap:10px;flex:1;justify-content:flex-end}#streakChip{font-size:14px;font-weight:700;color:var(--warning)}.iconbtn{background:var(--surface);border:1px solid var(--border);color:var(--text-dim);width:38px;height:38px;border-radius:var(--radius-sm);font-size:16px;cursor:pointer;transition:transform var(--t-fast, .12s) var(--ease, ease)}.iconbtn:active{transform:scale(.9)}#stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;position:relative}#game{display:block;touch-action:none;border-radius:var(--radius)}#modalRoot{position:fixed;inset:0;z-index:20;pointer-events:none}.scrim{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#06091ac7;backdrop-filter:blur(6px);pointer-events:auto;padding:20px;animation:fade .18s var(--ease, ease)}@keyframes fade{0%{opacity:0}to{opacity:1}}.card{width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px 22px;text-align:center;box-shadow:var(--shadow-md, 0 16px 48px rgba(0,0,0,.5));animation:pop .22s var(--ease, ease)}@keyframes pop{0%{transform:scale(.92);opacity:0}to{transform:scale(1);opacity:1}}.logo{font-size:64px;font-weight:900;line-height:1;color:var(--accent);text-shadow:0 0 30px color-mix(in srgb,var(--accent) 50%,transparent);margin-bottom:4px}.card h2{font-size:22px;font-weight:800;margin-bottom:10px}.tag{font-size:13px;color:var(--text-dim);margin-bottom:14px}.big{font-size:44px;font-weight:900;color:var(--text);letter-spacing:-1px;margin-bottom:2px}.how{font-size:13px;line-height:1.7;color:var(--text-dim);margin:12px 0 18px}.how b{color:var(--text);font-weight:700}.warn{color:var(--warning);display:inline-block;margin-top:4px}.rankline{font-size:14px;color:var(--text-dim);margin:8px 0 16px}.rankline b{color:var(--accent);font-size:17px}.pct{color:var(--warning);margin-left:4px}.seed{font-size:11px;color:var(--text-dim);opacity:.6;margin-top:14px}.demo{display:flex;justify-content:center;margin:8px 0 4px}.demo canvas{border-radius:var(--radius-sm);border:1px solid var(--border)}button.primary,button.ghost{width:100%;border-radius:var(--radius);font-size:16px;font-weight:700;padding:14px;cursor:pointer;transition:transform var(--t-fast, .12s) var(--ease, ease),filter .15s}button.primary{background:var(--accent);border:none;color:#042b25;margin-top:4px}button.primary:active{transform:scale(.96)}button.primary.glow{box-shadow:0 0 24px color-mix(in srgb,var(--accent) 55%,transparent)}button.ghost{background:var(--surface-2, #141a3a);color:var(--text-dim);border:1px solid var(--border)}button.ghost:active{transform:scale(.96)}button.ghost.dim{opacity:.6}.mini{font-size:12px;font-weight:600;opacity:.8;display:block;margin-top:2px}.row{display:flex;gap:10px;margin-top:10px}.row button{margin-top:0}.lblist{max-height:50vh;overflow-y:auto;margin:8px 0 16px;text-align:left}.lbrow{display:flex;align-items:center;gap:10px;padding:9px 6px;border-bottom:1px solid var(--border);font-size:14px}.lbr{width:24px;color:var(--text-dim);font-weight:700}.lbn{flex:1;color:var(--text)}.lbs{color:var(--accent);font-weight:700}.dim{color:var(--text-dim);font-size:13px;padding:16px 0}.skins{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 0 16px}.skin{display:flex;align-items:center;gap:8px;padding:10px;border-radius:var(--radius-sm);background:var(--surface-2, #141a3a);border:1px solid var(--border);cursor:pointer;color:var(--text);font-size:13px;transition:transform var(--t-fast,.12s) var(--ease,ease)}.skin:active{transform:scale(.95)}.skin.sel{border-color:var(--accent)}.skin.locked{opacity:.55}.skin .sw{width:18px;height:18px;border-radius:50%;background:var(--sc);box-shadow:0 0 10px var(--sc);flex:0 0 auto}.skin .sn{flex:1;text-align:left}.skin .lk{font-size:10px;color:var(--text-dim)}#toast{position:fixed;left:50%;bottom:80px;transform:translate(-50%,20px);background:var(--surface);border:1px solid var(--border);color:var(--text);padding:10px 18px;border-radius:var(--radius);font-size:13px;font-weight:600;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:40;box-shadow:var(--shadow-md, 0 8px 24px rgba(0,0,0,.4))}#toast.show{opacity:1;transform:translate(-50%)}@media (prefers-reduced-motion: reduce){.scrim,.card,button{animation:none!important}}