body {color:#111; background-color: #fff;margin: 0px}
div.outer{
position: absolute;
left: 50%;
top: 50%;
width: 995px;
height: 650px;
margin-left: -498px; /* half of width */
margin-top: -325px;  /* half of height */
}
div.inner{
position:absolute;
left: 50%;
top :50%;
width: 433px;
height: 433px;
margin-left: -216px;  /* half of width */
margin-top: -216px;   /* half of height */
}