:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;color-scheme:dark}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;overflow:hidden;background:#0d1117}canvas{display:block;touch-action:none;cursor:crosshair}.hud{position:absolute;top:16px;left:16px;padding:10px 14px;border-radius:10px;background:#0d1117b8;border:1px solid rgba(255,255,255,.12);color:#e6edf3;font-size:13px;line-height:1.6;pointer-events:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.hud b{font-variant-numeric:tabular-nums}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:#0d1117b3;color:#e6edf3;text-align:center}.overlay button{margin-top:16px;padding:10px 20px;font-size:15px;border-radius:8px;border:1px solid rgba(255,255,255,.2);background:#238636;color:#fff;cursor:pointer}