#interactive.viewport {
	position: relative;
	width: 100%;
	height: auto;
	overflow: hidden;
	text-align: center;
}
#interactive.viewport > canvas,
#interactive.viewport > video {
	max-width: 100%;
	width: 100%;
}
canvas.drawing,
canvas.drawingBuffer {
	position: absolute;
	left: 0;
	top: 0;
}
