body {
	font: 14px sans-serif;
}

.chart {
	background: lightblue;
}

.chart-div {
	width: 960px;
	height: 640px;
	margin: 0 auto;
}

.heading {
	text-align: center;
	font-size: 20px;
}

.link {
	stroke: black;
	stroke-width: 1px;
	sharp-rendering: crispEdges;
}