body{background-image: none;}



a#cadre404{
display: block;
width: 624px;
height: 336px;
position: absolute;
left:50%;
top:50%;
margin-left: -312px;
margin-top: -168px;
}

h1{

position: relative;
top:60px;
left:50px;
padding-bottom: 40px;

}