nav {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	margin: .1em auto 0 auto;
	text-align: center;
	background: rgba(255,255,255,.8);
	margin: 0;
	z-index: 3;
} 
nav li {
	display: inline-block;
	line-height: 3em;
	margin: auto 1em;
}
nav li a {
	display: inline-block;
	margin: auto;
	color: gray;
	text-decoration: none;
}
nav li.active a {
	color: #048;
}
header {
	margin-top: 3rem;
	height: 16rem;
	overflow: hidden;
	text-align: right;
	color: #fff;
	font-family: monospace;
	padding: 1rem;
	font-size: 4em;
	background: url('pvv-background.png') no-repeat 1% 50% #024;
	background-size: contain;
}
main {
	max-width: 60rem;
	margin: -7rem auto 0 auto;
	padding: 0;
}
article {
	padding: .1rem 1rem 1rem 1rem;
	margin: 0 1rem 0 1rem;
	background: white;

	z-index: 2;
	position: relative;
}
article p {
	text-align: justify;
}
article:first-child {
	border-radius: .5rem .5rem 0 0;
}
main:before {
	content: " ";
	display: block;
	position: absolute;
	top: 16rem;
	left: 1rem;
	right: 1rem;
	margin: 0 auto;
	height: 8em;
	z-index: 1;
	max-width: 58rem;
	box-shadow: 0 -.2rem .15rem rgba(0,0,0,.3);
	border-radius: 0 0 .3em .3em;
	background: white;
}

.split {
	display: table;
	width: 100%;
	table-layout: fixed;
	border-spacing: 1em;
}
.split > * {
	display: table-cell;
}

a.btn {
	text-decoration: none;
	border: 1px solid #048;
	color: #048;
	padding: .2em 1em;
	border-radius: .2em;
	white-space: nowrap;
	display: inline-block;
	margin-bottom: .25em;
}
a.btn:hover {
	border-color: #084;
	background: #eee;
	color: #084;
}
a.btn:active {
	border-color: #084;
	background: #084;
	color: white;
}

.icon.subscribe {
	color: white;
	background: #082;
	border-radius: 1em;
	width: 1em;
	line-height: 1em;
	text-align: center;
}

@media screen and (max-width: 50rem) {
	.split, .split > * {
		display: block;
	}
	img.float-right {
		display: none;
	}
	nav li {
		margin: auto .5em;
	}
	header {
		font-size: 2em;
	}
	main {
		margin: -13rem auto 0 auto;
	}
	article {
		margin: 0 .5rem 0 .5rem;
	}
	main:before {
		left: .5rem;
		right: .5rem;
	}
}
@media screen and (max-width: 23rem) {
	body {
		font-size: 0.8em;
	}
	header {
		margin-top: 2.4rem;
	}
	main:before {
		top: 13rem;
		height: 13em;
	}
}