html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

canvas {
  height: 100%;
  width: 100%;
  display: block;
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-crisp-edges;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  touch-action: manipulation;
}