#logo {
    position:relative;
    background:url('../images/immobilier/logo_immobilier.png') no-repeat top left;
    width:269px;
    height:105px;
    display:block;
    float:left;
}
#menu ul li {
    text-align:center;
    padding-left: 35px;
    padding-right: 35px;
}