html, body {
  height: 100%;
}

body {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas {
  border: 2px inset;
  image-rendering: -moz-crisp-edges;
  image-rendering: pixelated;
  background: black;
}

@media (min-width: 380px) {
  canvas {
    transform: scale(2);
  }
}

@media (min-width: 760px) {
  canvas {
    transform: scale(4);
  }
}