body {
	background-color: powderblue;
}

header {
	font-size: 1.5em;
}

nav {
	overflow: auto;
	float: left;
	border: 1px solid red;
	width: 300px;
}

nav ul {
	list-style-type: square;
}

main {
	overflow: auto;
	border: 1px solid red;
	width: auto;
	margin-left: 300px;
	margin-right: 250px;
}

main article {
	overflow: auto;
	float: left;
	border: 1px solid red;
	width: auto;
}

aside {
	overflow: auto;
	float: right;
	border: 1px solid red;
	width: 250px;
}

footer {
	clear: both;
	border: 1px solid red;
}