html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}
body {
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
canvas {
  flex-shrink: 0;
  background-color: #222;
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-crisp-edges;
  image-rendering: pixelated;
  object-fit: contain;
}