body {
  
}
#holder {
    height: 480px;
    left: 50%;
    margin: -240px 0 0 -320px;
    position: absolute;
    top: 50%;
    width: 640px;
}
#copy {
    bottom: 0;
    position: absolute;
    right: 1em;
    text-align: right;
}
#copy a {
    color: #fff;
}