body {
    background-color:#C4CCA0;
    font-family:Verdana, Arial, Helvetica, sans-serif;
    color:#3E3E40;
    font-size:13em; 
}

#construction {
   color:#F10004;
   font-size:0.2em; 
   font-weight: bold;
   text-align : center;
   margin-top: 25%;
}

#conteneur {    
    position:absolute;
    width:1024px;
    top:0px;
    left:50%;
    margin-left:-512px;
}