: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);font-variant-numeric:tabular-nums;overflow:hidden;touch-action:none;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}#app{position:relative;width:100%;max-width:480px;height:100dvh;margin:0 auto;overflow:hidden;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}#game{display:block;width:100%;height:100%;position:absolute;inset:0}.hud{position:absolute;top:calc(env(safe-area-inset-top) + 10px);left:14px;right:14px;display:flex;align-items:center;gap:10px;pointer-events:none;z-index:4}.hud-puzzle{font-weight:700;font-size:16px;color:var(--text);letter-spacing:.02em}.hud-puzzle small{color:var(--text-dim);font-weight:600;font-size:12px;margin-left:4px}.hud-spacer{flex:1}.hud-threads{display:flex;align-items:center;gap:6px;font-weight:700;font-size:15px;color:var(--accent);font-family:var(--font-num)}.hud-threads .lbl{color:var(--text-dim);font-weight:600;font-size:11px;font-family:var(--font-ui)}.cov-wrap{position:absolute;left:14px;right:14px;top:calc(env(safe-area-inset-top) + 44px);z-index:4;pointer-events:none}.cov-track{height:10px;background:#ffffff0f;border-radius:6px;overflow:hidden;border:1px solid var(--border)}.cov-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent-dim),var(--accent));border-radius:6px;transition:width .18s var(--ease)}.cov-fill.win{background:linear-gradient(90deg,var(--accent),var(--warning))}.cov-meta{display:flex;justify-content:space-between;margin-top:4px;font-size:11px;color:var(--text-dim);font-weight:600}.cov-pct{color:var(--accent);font-family:var(--font-num);font-weight:700}.dock{position:absolute;left:0;right:0;bottom:calc(env(safe-area-inset-bottom) + 12px);display:flex;justify-content:center;gap:10px;z-index:4;padding:0 14px}.icon-btn{pointer-events:auto;width:46px;height:46px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:19px;display:grid;place-items:center;cursor:pointer;transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease)}.icon-btn:active{transform:scale(.9);background:var(--surface-2)}.overlay{position:absolute;inset:0;background:#060918bd;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:grid;place-items:center;z-index:10;padding:20px;opacity:0;pointer-events:none;transition:opacity var(--t-base) var(--ease)}.overlay.show{opacity:1;pointer-events:auto}.sheet{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:24px 22px;transform:translateY(14px) scale(.98);transition:transform var(--t-base) var(--ease);max-height:86dvh;overflow-y:auto}.overlay.show .sheet{transform:translateY(0) scale(1)}.sheet h1{font-size:24px;font-weight:800;letter-spacing:.01em;margin-bottom:6px}.sheet h2{font-size:19px;font-weight:800;margin-bottom:10px}.sheet p{color:var(--text-dim);font-size:14px;line-height:1.6;margin-bottom:8px}.sheet .big-num{font-family:var(--font-num);font-weight:800;font-size:46px;color:var(--accent);text-align:center;margin:6px 0 2px;letter-spacing:.01em}.sheet .sub{text-align:center;color:var(--text-dim);font-size:13px;margin-bottom:16px}.btn{appearance:none;width:100%;border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:var(--radius-sm);padding:14px 16px;font-family:var(--font-ui);font-weight:700;font-size:15px;cursor:pointer;margin-top:10px;display:flex;align-items:center;justify-content:center;gap:8px;transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}.btn:active{transform:scale(.97)}.btn--primary{background:var(--accent);border-color:var(--accent);color:#03150f}.btn--primary:active{background:var(--accent-dim)}.btn--gold{background:var(--warning);border-color:var(--warning);color:#2a1c00}.btn--ghost{background:transparent}.btn .tag{font-size:11px;font-weight:700;background:#0000002e;padding:2px 7px;border-radius:6px}.btn--primary .tag,.btn--gold .tag{background:#00000029}.steps{display:flex;flex-direction:column;gap:14px;margin:14px 0 6px}.step{display:flex;gap:12px;align-items:flex-start}.step .ic{flex:0 0 48px;height:48px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border);display:grid;place-items:center;overflow:hidden}.step .ic canvas{display:block}.step .tx b{display:block;font-size:14px;margin-bottom:2px}.step .tx span{font-size:12.5px;color:var(--text-dim);line-height:1.5}.lb-list{margin:10px 0 4px;max-height:240px;overflow-y:auto}.lb-row{display:flex;align-items:center;gap:10px;padding:9px 4px;border-bottom:1px solid rgba(255,255,255,.05);font-size:14px}.lb-row .rk{width:30px;color:var(--text-dim);font-weight:700;font-family:var(--font-num)}.lb-row .nm{flex:1;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-row .sc{font-family:var(--font-num);font-weight:700;color:var(--accent)}.lb-row.me{background:#00c9a714;border-radius:8px}.cos-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:12px 0}.cos-cell{aspect-ratio:1;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);display:grid;place-items:center;position:relative;overflow:hidden;cursor:pointer}.cos-cell.owned{border-color:var(--accent)}.cos-cell.active{box-shadow:inset 0 0 0 2px var(--accent)}.cos-cell .lock{position:absolute;top:4px;right:6px;font-size:12px;opacity:.7}.cos-cell .nm{position:absolute;bottom:4px;left:0;right:0;text-align:center;font-size:10px;color:var(--text-dim)}.toast{position:absolute;left:50%;bottom:84px;transform:translate(-50%) translateY(10px);background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:10px 16px;border-radius:999px;font-size:13px;font-weight:600;z-index:8;opacity:0;pointer-events:none;transition:opacity var(--t-base) var(--ease),transform var(--t-base) var(--ease);white-space:nowrap}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.muted-link{text-align:center;color:var(--text-dim);font-size:13px;margin-top:14px;cursor:pointer;padding:6px}.muted-link:active{color:var(--text)}.row2{display:flex;gap:10px}.row2 .btn{margin-top:10px}@media (prefers-reduced-motion: reduce){.overlay,.sheet,.cov-fill,.toast,.btn,.icon-btn{transition:none!important}}