html,body {
	position: abolute;
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
}

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

canvas {
  width: 100vw;
	height; 100vw;
	max-height: 100vh;
	max-width: 100vh;
	margin: auto;
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	
}