* {
	margin: 0;
	padding: 0;
}
body {
	background-color: #6dcff6;
	background-image: url("/static/touchgrass.png");
	background-position: top;
	background-repeat: repeat-x;
	background-attachment: fixed;
	font-family: sans-serif;
	padding: 0 16px;
}
article {
	background: #ffffee;
	border: 5px solid #ffcc00;
	margin: 16px auto;
	max-width: 800px;
	padding: 12px;
}
p, h1, h2, h3 {
	margin: 1em;
}
hr {
	background: #ffcc00;
	border: 2px solid #ffcc00;
	height: 0;
	max-height: 0;
	min-height: 0;
	margin: 1em;
}
.center {
	text-align: center;
}
.math > * {
	margin: 0 2px;
}
.mfrac {
	display: inline-block;
	font-size: 75%;
	text-align: center;
	vertical-align: middle;
}
.mfrac > * {
	display: block;
	padding: 0 5px;
}
.mfbar {
	border: 1px solid #000;
	height: 0;
	max-height: 0;
	min-height: 0;
	overflow: hidden;
	padding: 0;
}
.unlink {
	text-decoration: none;
}
footer {
	margin: 50px;
	text-align: center;
}