.schedule {
	text-align: center;
	background-color: rgba(255,255,255,.75);
	padding: 20px;
	margin-bottom: 100px;
}
.schedule div, .schedule h2, .schedule h3 {
	margin: 0;
	padding: 0;
}
.schedule h3:hover {
	text-shadow: 0 0 2px #000;
}
.schedule h2 {
	text-decoration: underline;
	margin-bottom: 20px;
}
.class > div, .class-hollow {
	min-height: 100px;
	display: table;
}
.class > div .table-cell {
	display: table-cell;
	vertical-align: middle;
}
.invisible {
	display: none;
	visibility: hidden;
}
.class:hover {
	cursor: pointer;
	background: rgba(255,255,255,.9);
}
.class-open .invisible {
	display: block;
	visibility: visible;
}