body {
	margin:2em;
}
a {
	font-weight:bold;
	text-decoration:none;
}
a:hover {
	text-decoration:underline;
}
.toc {
	margin-left:2em;
}
.section {
	margin-top:2em;
	margin-bottom:1em;
	border:1px solid black;
	text-align:center;
	background-color:#ddd;
}
table {
	empty-cells:hide;
}	
td {
	padding:4px;
}