:root{--bg: #0b0e1a;--bg-2: #10142a;--cyan: #22e3ff;--magenta: #ff2fb3;--yellow: #ffd23f;--green: #5aff3d;--orange: #ff8a2f;--red: #ff3b3b;--panel: rgba(13, 18, 38, .85);--border-neon: rgba(34, 227, 255, .5);--text-dim: #9aa7c7;--font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden}body{background:var(--bg);color:#dbe4ff;font-family:var(--font);user-select:none;cursor:crosshair}#app,#ui-root{position:fixed;inset:0}#app canvas{display:block;width:100%;height:100%}#ui-root{pointer-events:none}#ui-root>*{pointer-events:auto}.ui-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:24px;text-align:center;background:radial-gradient(ellipse at center,#10142a8c,#060812e0);backdrop-filter:blur(2px)}.game-title{font-size:clamp(40px,8vw,84px);font-weight:900;letter-spacing:6px;color:var(--cyan);text-shadow:0 0 12px rgba(34,227,255,.8),0 0 42px rgba(34,227,255,.45)}.game-title span{color:var(--magenta);text-shadow:0 0 12px rgba(255,47,179,.8),0 0 42px rgba(255,47,179,.45)}.select-title{font-size:clamp(32px,6vw,60px);color:var(--yellow);text-shadow:0 0 12px rgba(255,210,63,.8),0 0 42px rgba(255,210,63,.45)}.gameover-title{color:var(--red);text-shadow:0 0 12px rgba(255,59,59,.8),0 0 42px rgba(255,59,59,.45)}.subtitle{color:var(--text-dim);font-size:15px;letter-spacing:2px}.menu-hint{margin-top:8px;color:var(--text-dim);font-size:14px}kbd{display:inline-block;min-width:22px;padding:2px 8px;margin:0 2px;border:1px solid var(--border-neon);border-bottom-width:2px;border-radius:5px;background:#22e3ff14;color:var(--cyan);font-family:inherit;font-size:12px;text-align:center}.play-hint{position:absolute;left:16px;bottom:16px;max-width:340px;padding:10px 14px;font-size:12px;line-height:1.9;color:var(--text-dim);background:var(--panel);border:1px solid var(--border-neon);border-radius:8px;box-shadow:0 0 18px #22e3ff26}.demo-stats{position:absolute;top:16px;right:16px;padding:8px 12px;font-size:12px;line-height:1.6;font-variant-numeric:tabular-nums;white-space:pre;color:#cfd8f0;background:#0a0e1eb3;border:1px solid rgba(255,47,179,.4);border-radius:8px}