#startBtn {
	display: inline-block;
	border: 0.15em solid #000000;
	padding: 0.3em 0.5em;
	margin: 0.6em;
	color: #000000;
	text-decoration: none;
}
#chart1Area,#chart2Area {
	width: 100%;
	max-width: 30em;
	height: 10em;
	display: block;
	margin: 0 auto;
}