body{
	margin: 0;
	padding: 0;
	background: #f9f9f9;
}
canvas{
	position: absolute;
	top: 0;
	left: 0;
	z-index: -1;
}
#controls{
	display: inline-block;
	border: 1px solid;
	padding: 3px;
	margin: 3px;
	/* 3ICE: This didn't help: */
	/* pointer-events: none; */
	/* Canvas drag events are still lost under the entire top row
   * (113 pixels thick!) of the screen. */
}