.nodenet-node {
	font-size: x-small;
	font-weight: bold;
	margin: -2px;
	padding: 0;
	width: 3.2ch;
	height: 3.2ch; /* width */
	left: -1.6ch; /* -width/2 */
	top: -1.6ch; /* -width/2 */
	line-height: 3.2ch; /* width */
	text-align: center;
	background-color: white;
	border: 2px solid black; /* -margin */
	border-radius: 50%;
}

.nodenet-node-small {
	font-size: 0;
	color: transparent;
	width: 6px;
	height: 6px;
	left: -3px;
	top: -3px;
}