#left ul, li{
list-style-type: none;
margin:0;
padding: 0;
}

#left a{ /* dimensions et definitions des boutons */
display: block;  /* mise en block de <a> pour lui donner des dimensions */
width: 150px;
color: #FFF;
font: 17px/28px "Trebuchet MS", Verdana, "Lucida Grande", Tahoma, Helvetica, Sans-Serif;
font-weight: bold;
text-decoration: none;
border-bottom: 1px solid white;
border-top: 1px solid #d03b4c;
border-left: 1px solid #d03b4c;
border-right: 1px solid #d03b4c;
background-color: #d03b4c;
text-align: center;
}

#left a:hover{
color: #d03b4c;
background-color: #FFF;
border: 1px solid #d03b4c;
font-weight: bold;
text-decoration: none;
}