html, body {
  margin: 0;
  padding: 0;
}

canvas {
  width: 500px;
  height: 500px;
  max-width: 100vw;
	max-height: 100vh;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
  border: 2px solid #8DA5B2;
}