html, body {
	width: 100%;
	height: 100%;
	overflow: hidden;
}
#canvas {
	width: 985px;
	height: 555px;
	position: relative;
	left: 50%;
	top: 50%;
	margin-left: -492px;
	margin-top: -287px;
}
.piece {
	position: absolute;
	overflow: hidden;
	width: 16px;
	height: 16px;
}
.scroll {
	position: absolute;
	overflow: auto;
	width: 16px;
	height: 16px;
}
.placeholder {
	width: 1px;
	height: 1px;
}