html { 
  margin:0;
  padding:0;
  background: url(serveurdedie_top.jpg) no-repeat center fixed; 
  -webkit-background-size: cover; /* pour anciens Chrome et Safari */
  background-size: cover; /* version standardisée */
}



.header-logo a {
    background: url("https://www.promatec.tm.fr/templates/promatec/img/logo_promatec.svg") no-repeat scroll 0 0;
        background-repeat: no-repeat;
        background-size: auto auto;
    background-size: 250px 64px;
    background-repeat: no-repeat;
    display: block;
    font-size: 0;
    height: 64px;
    text-indent: -9999px;
    width: 250px;
    display: inline-block;
    margin-top: 15px;
    transition: all 0.3s ease 0s;
}

.logo{
margin-top:150px;
text-align:center;
}

.data{
padding-top:55px;
color:#ffffff;
font-size:18px;
font-family:verdana, arial;
}