body{
	width: 80%;
	margin-left:auto;
	margin-right: auto;
	font-family: 'Open-Sans', sans-serif;
	display: flex;
	flex-direction: column;
	height: 100vh;
	padding: 0;
	margin-top: 0;
	margin-bottom: 0;
}

.header {
	padding-top: 10px;
}

.header img{
	display: inline;
	width: 200px;
	height: auto;
	margin-left: auto;
	margin-right: auto;
}

.header div{
	display: block;
	color: #808080;
}

.header .title{
	display: block;
	font-size: 2em;
	font-weight: bold;
}

.header .subtitle{
	display: inline;
	font-size: 1.4em;
}

.nav ul{
	list-style-type: none;
	margin: 0px;
	margin-top: 10px;
	padding: 0px;
	display: flex;
}

.nav ul li{
	flex-grow: 1;
	background-color: #808080;
	color: #FFFFFF;
}

.nav ul li:hover{
	background-color: #909090;
}

.nav ul li a{
	display: block;
	padding: 10px;
}

.nav ul li>a:visited, .nav ul li a:link{
	color: white;
	text-decoration: none;
}

nav{
	text-align:center;
	flex-shrink: 1;
}

main{
	width: 90%;
	margin-left: auto;
	margin-right: auto;
	overflow-y: auto;
	flex-grow: 1;
}

footer {
	text-align: center;
	flex-shrink: 1;
}