#header {
 border: thin solid black;
 background-color: black;
 color: white;
}

#body {
 position: relative;
}

#main {
 padding-left: 9em;
}

#sidebar {
 padding: 0.5em;
 position: absolute;
 top: 0;
 left: 0;
 width: 8em;
 border: thin solid black;
 color: black;
}

#footer {
 clear: both;
}