*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: #0d0d1a;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
}

#game {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  /* Default 3× scale; CSS clamps to viewport */
  width: min(960px, 100vw);
  height: min(720px, 75vw);
  aspect-ratio: 4 / 3;
  display: block;
}