.header { 
    height: 300px;
    width: 50%;
    background-color: #00cd99;
    margin-left: 10px;
    padding: 15px;
    color: #ffffff;
    border-radius: 5px;
}

.wrapper { 
    width: 50%;
    margin-left: 20px;
}

.footer, .push { 
    clear: both;
}

.footer  {
    height: 30px;
    width: 50%;
    background-color: #000099;
    margin-left: 10px;
    padding: 15px;
    color: #ffffff;
    border-radius: 5px;
}

.footer a {
    text-decoration: none;
    margin-left: 5px;
    margin-right: 5;
    color: #ffffff;
    background-color: #0000ee;
    font-family: Cursive;
    font-weight: bold;
}

.diagram { 
    margin:10px;
}

.caption { 
    font-size: 12px;
    text-align: center;
}