html,
body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
	justify-content: center;
	align-items: center;
}

html {
	flex-direction: column;
}

body {
	flex-direction: row;
}

canvas {
	margin: auto;
	display: block;
}