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

main {
	text-align: center;
	width: 100%;
}

canvas {
  display: block;
	position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 50%;
  height: 50%;
  padding: 20px;
  text-align: center;
}