#page {
    margin-left: auto;
    margin-right: auto;
    width: 80%;
    height: 300px;
}

#header {
    clear: both;
    text-align: center;
    padding: 30px;
}

#nav {
    text-align: center;
    padding: 30px;
}

#mainContent {
    text-align: left;
    width: 100%;
    padding: 0px;
}