<div id="header">
    <ul class="site-nav">
      <li><a href="index.html"><br />Accueil</a></li>
      <li><a href="swedtech.html"><br />SWEDTECH</a></li>
      <li><a href="prestations.html"><br />Prestations</a></li>
      <li><a href="modding.html"><br />Modding</a></li>
   <li><a href="contact.html"><br />Contact</a></li>
    </ul>
  </div>

.site-nav { width:1000px; overflow:hidden; border-right:1px solid #000000; border-top:1px solid #000000; border-bottom:1px solid #000000; vertical-align:central;background:url(images/bouton1.jpg);background-size: 20% 100%;background-repeat: no-repeat;}
.site-nav li  {float: left;font-weight: bold; border-left: 1px solid #000000; padding: 0px 73px 5px 73px; height: 50px; width: 53px; text-align: center; }
.site-nav li a:hover {}
.site-nav li a { color: #C0C0C0;}
.site-nav li a.act {position: fixed;top: 20px;text-align: center;vertical-align: middle;}
.site-nav li.last { border:0;}