body {
	margin: 10px auto;
	max-width: 60em;
	font-family: sans-serif;
	color: #333333;
	padding-bottom: 3em;
}

header,
nav,
nav a,
main,
article,
section,
aside {
	border-radius: 0.5em 0.5em;
	border: 1px solid;
	padding: 10px;
	margin: 10px;
}

header {
	position: fixed;
	padding: 10px;
	top: 0;
	left: 0;
	right: 0;
	background: #237AFC;
	border-color: #0066ff;
}

header p { 
	color: white; 
	font-weight: bold
}

header img {
	width: 8.5em;
	margin-right: 50px;
	float: left;
}

nav {
	position: fixed;
	font-size: 0.91em;
	float: left;
	left: 0;
	width: 10em;
	padding: 0;
	top: 8em;
	background: #ffffff;
	border-color: #0066ff;
}

nav ul {
	padding: 0;
}

nav li {
	list-style: none;
	margin: 0;
	padding: 0.5em;
}

nav a {
	display: block;
	padding: 0.2em 10px;
	font-weight: bold;
	text-decoration: none;
	background-color: #ffffff;
	color: #237AFC;
}

nav ul a:hover,
nav ul a:active {
	color: #ffffff;
	background-color: #237AFC;
	;
}

main {
	display: block;
	background: #cccccc;
	border-color: #8a9da8;
	margin-top: 8em;
	margin-left: 11em;
	min-width: 16em;
	/* Mindestbreite (der Ueberschrift) verhindert Anzeigefehler in modernen Browsern */
}

article {
	background: #ffede0;
	border-color: #df6c20;
	margin-right: 15em;
}

article p {
	margin-bottom: 10em;
}

aside {
	background: #ebf5d7;
	border-color: #8db243;
	float: right;
	width: 12em;
}

footer {
	position: fixed;
	padding: 10px;
	bottom: 0;
	left: 0;
	right: 0;
	background: #c32e04;
	border-color: #8a9da8;
	background: #237AFC;
	border-color: #0066ff;
}

footer p {
	float: right;
	margin: 0;
}