body {
	background: rgb(140, 185, 231);
	margin: 30px 30px 80px;
	padding: 0;
	font-family: sans-serif;
	line-height: 1.5;
}

article {
	max-width: 800px;
	background: #FFFFFF;
	box-shadow: 0 5px 10px rgba(0, 0, 0, 0.5);
	margin: 0 auto;
	padding: 20px;
	border-radius: 2px;
	color: #222222;
}

article > header {
	margin: -20px -20px 30px;
	padding: 10px 20px;
	background: linear-gradient(#DDEEFF, #FFFFFF);
	border-radius: 2px;
}

article > header > h1 {
	margin: 0 0 10px;
	padding: 0;
	font: 3.5em 'Vollkorn', serif;
	text-align: center;
	clear: both;
}

article > header > .sequence-diagram {
	filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.2));
}

article > h2 {
	margin: 35px -20px 10px;
	padding: 5px 20px 0;
	font: 2em 'Vollkorn', serif;
	clear: both;
}

article > h3 {
	margin: 25px -20px 10px;
	padding: 5px 20px 0;
	font: 1.5em 'Vollkorn', serif;
	clear: both;
}

article > h4 {
	margin: 15px -20px 10px;
	padding: 5px 20px 0;
	font: 1.1em 'Vollkorn', serif;
}

article > p {
	margin: 20px 0;
	padding: 0;
	text-align: justify;
}

article > ul {
	margin: 10px 0;
	padding: 0 0 0 30px;
}

a:link, a:visited {
	color: #556688;
	text-decoration: underline;
}

a:hover, a:active {
	color: #5577AA;
	text-decoration: none;
}

.right {
	float: right;
	width: 150px;
}

.example-diagram {
	float: right;
	max-width: 300px;
	margin-left: 20px;
	background: #F8F8F8;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.region.focus rect {
	stroke-width: 5px;
	stroke: rgba(255, 128, 0, 0.5);
}

pre {
	background: #EEEEEE;
	margin: 5px 0;
	padding: 10px;
	overflow: auto;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
	min-width: 150px;
	font-size: 1.1em;
	line-height: 1.2;
}

nav {
	display: block;
	position: sticky;
	bottom: -1px;
	margin: 40px -20px -20px;
	border-top: 1px solid rgba(0, 0, 0, 0.2);
	background: #FFFFFF;
	border-bottom-left-radius: 2px;
	border-bottom-right-radius: 2px;
	text-align: right;
	font-size: 0.8em;
	box-shadow: 0 -2px 4px -4px #000000;
}

nav a {
	display: inline-block;
	padding: 10px 20px;
	border-left: 1px solid rgba(0, 0, 0, 0.2);
}

nav a:hover {
	background: #EEEEEE;
}