html, body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
overflow: hidden;
}

#hintergrund {
width: 100%;
height: 100%;
position: relative;
z-index: 1;
}

#content {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 2;
overflow: auto;
color:#FFFFFF;
}