body{margin:0;background:#080b12;color:#e9ecf1;font-family:system-ui;user-select:none}
.hud{position:fixed;top:10px;left:10px;display:flex;gap:20px;z-index:5}
canvas{display:block;margin:60px auto 0;background:#0d1320;box-shadow:0 0 30px #000;border-radius:8px}
.overlay{position:fixed;inset:0;display:grid;place-items:center;background:rgba(0,0,0,.6);text-align:center;color:#fff;z-index:10}
.hidden{display:none}