body {
	font-family: sans-serif;
	color: #333333;
	padding: 3em 0 4em;
}

body,
.wrapper {
	margin: 10px auto;
	/*max-width: 60em;*/
}
 
header, main, section, footer {
	border-radius: 0px 0.5em 0.5em;
	border: 1px solid;
	padding: 10px;
	margin: 10px;
}
 
header {
	position:fixed;
	top:0px;
	left:0px;
	right:0px;
	text-align:center;
	padding: 10px;
	background: lightgrey;
	/*border-bottom: 1px solid #d5d5d5;*/
}

nav {
	/*position: fixed;*/
	/*padding-top: 10em;	*/
	
	border-radius: 0px 0.5em 0.5em;
	border: 1px solid;

	padding: 0;
	margin: 10px;

	font-size: 0.91em;
	float: left;
	width: 15em;
	background: lightskyblue;
	border-color: skyblue;
}

nav ul {
	padding: 0;
}

nav li {
	list-style: none;
	margin: 0.4em;
	padding: 0;
}

nav ul ul {
	margin: 0 0 0 2em;
	padding: 0;
	border: none;
}

nav ul ul li {
	margin: 0.3em 0;
}

nav a {
	display: block;
	padding: 0.4em;
	text-decoration: none;
	font-weight: bold;
	border: 1px solid blue;
	border-radius: 10px;
	box-shadow: 0px 5px 10px white inset;
	background-color: skyblue;
	color: #333;

}

nav a:focus,
nav a:hover {
	color: royalblue;
	background-color: gold;
}

main {
	display: block;
	background: lightblue;
	border-color: #8a9da8;
	margin-left: 15em;
	min-width: 16em; /* Mindestbreite (der Überschrift) verhindert Anzeigefehler in modernen Browsern */
}
 
footer {
	position:fixed;
	padding: 10px;
	margin-top: 10px;
	bottom:0;
	left: 0;
	right:0;
	background: lightgrey;
	border-color: grey;
}
 
footer p {
	float:right;
	margin: 0;
}