nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    display: inline;
    border: solid;
    border-width: 3px 3px 0 3px;
    border-color: blue;
    font-size: 2em;
}

nav li a {
    padding: 0 10px;
    text-decoration: none;
}

#whole {
    margin: auto;
    width: 60%;
}

#content {
    border: 3px solid blue;
    clear: both;
    padding: 2em;
    font-size:2em;
}

h1 {
    margin: 0;
    padding: 0 0 10px 0;
    text-align:center;
    margin-top:5em;
    font-size:3em;
    color:blue;
}

#selected {
    position: relative;
    top: 3px;
    background: white;
}

#header li {
    float: left;
    border: 3px solid blue;
    border-bottom-width: 0;
    margin: 0 5px 0 0;
}