body {
    font-family: arial, FreeSans, Helvetica, sans-serif;
    font-size:2em;
}
#phonebox {
    position: relative;
    height: 100px;
    width: 200px;
    background-color: red;
    padding:10px;
}
a#control {
    position: absolute;
    bottom: 5px;
    right: 5px;
    font-size:0.5em;
    color: white;
    text-decoration: none;
}