html, body {
	min-height: 100vh;
}

body {
	display: flex;
	flex-flow: column nowrap;
}

header {
	background-color: #21212d;
	color: white;
	text-align: center;
	padding: 1em 2em 5.5em;
}

header > nav {
	margin: 0 0 calc(4.5em - 0.4078125rem - 1.5 * 1.125rem);
	text-align: right;
}

header > .tagline {
	font-size: 2em;
	font-style: italic;
	padding-top: 1em;
	margin-bottom: 0;
}

header > .logo > img {
	max-width: 100%;
}

section.document {
	display: block;
	padding: 3em 2em 0;
}

section.document details:not(:last-of-type) {
	padding-bottom: 1.5em;
}

section.document summary {
	font-size: 2em;
	font-style: italic;
	padding-bottom: 0.35em;
}

nav a,
section.document a {
	font-size: 1.125rem;
	background: #f2f2f2;
	color: #191919;
	cursor: pointer;
	display: inline-block;
	margin-right: 0.45rem;
	padding: 0.4078125rem 1.4625rem;
	text-align: center;
	text-decoration: none;
}

section.document a {
	margin-bottom: 1.125rem;
}

nav a:hover,
nav a:focus,
section.document a:hover,
section.document a:focus {
	background: #d9d9d9;
	color: #000
}

section.notes {
	flex: 1;
	display: block;
	padding: 0 2em 1em;
}

section.notes > p {
	margin-left: 1rem;
	font-style: italic;
}

section.notes > p > .intro {
	background: #f2f2f2;
	padding: 0.1rem 0.2rem;
	margin: 0 0 0 -1em;
	font-style: normal;
}

footer {
	max-width: 100%;
	font-size: 0.8em;
	border-top: 1px solid #eee;
	padding: 0.5em 2em;
	background: rgb(250, 250, 250);
}

@media (max-height: 50rem) {
	header {
		padding: 0.5em 1.5em 2em;
	}

	header nav {
		margin: 0 0 calc(1.5em - 0.4078125rem - 1.5 * 0.8rem);
	}

	header nav a {
		font-size: 0.8rem;
	}

	header .logo img {
		width: 126px;
	}
	
	section.document {
		padding: 1em 1.5em 0;
	}

	section.document details:not(:last-of-type) {
		padding-bottom: 0;
	}
	
	section.notes {
		padding: 1em 1.5em;
	}
	
	footer {
		padding: 0.5em 1.5em;
	}
}