html, body {
  margin: 0;
  padding: 0;
}
canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-crisp-edges;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}