:root { color-scheme: dark; background: #07111f; }
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; background: #07111f; }
body { touch-action: none; user-select: none; -webkit-user-select: none; }
#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  cursor: default;
  touch-action: none;
}