body {
  display: grid; 
  height: 100vh;
}
canvas {
  --scale: 3;
  width: calc(320px * var(--scale));
  height: calc(200px * var(--scale));
  place-self: center;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 1px solid black;
}