html, body {
  height: 100%;
}

body {
  margin: 0;
  background: #222;
  display: flex;
  overflow: hidden;
}

#app {
  width: 100vmin;
  height: 100vmin;
  margin: auto;
}

canvas {
  width: 100%;
  height: 100%;
  image-rendering: optimizeSpeed;
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: -o-crisp-edges;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
  -ms-interpolation-mode: nearest-neighbor;
}