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

body {
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
}

canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: 100vw;
  height: 56.25vw; /* 16:9 */
  max-height: 100vh;
  max-width: 177.78vh;
}