dow/server/static/app.css

* {
	padding: 0;
	margin: 0;
}

body {
	background: #000;
}

#canvas {
	display: block;
	margin: 1rem auto;
	background: #fff;
	image-rendering: optimizeSpeed;
	image-rendering: -webkit-optimize-contrast;
	image-rendering: -o-crisp-edges;
	image-rendering: optimize-contrast;
	-ms-interpolation-mode: nearest-neighbor;
}