html, body {
height: 100%;
margin: 0px;
}

#header {
height: 80px;
background-color: blue;
color: white;
line-height: 80px;
text-align: center;
}

#nav {
line-height: 30px;
background-color: #eee;
height: calc(100% - 100px);
width: 100px;
padding-left: 10px;
float: left;
}

#main {
width: 600px;
padding: 20px;
float: left;
}

#footer {
height: 20px;
background-color: blue;
color: white;
text-align: center;
clear: both;
}

.caption {
background-color: red;
color: white;
text-align: right;
font-family: arial, sans-serif;
font-size: 9px;
padding: 5px;
}

.caption a {
color: white;
}