#nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #d5e5d5;
    color: #4d4d4d;
}

#content {
    position: static;
    height: 1000px;
    padding: 10px;
    border: 1px solid #4d4d4d;
    margin-top: 100px;
}