#siteheader
{
    width: 100%;
    height: 40px;
    position: fixed;
    background-color: green;
}

#content
{
    padding-top: 50px;
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 10px;
}

button
{
    background-color: green;
    height: 40px;
    width: 100px;
    border-width: 2px;
    border-color: lime;
}