html 
{
margin:0;
padding:0;
background: url("Images/fond site.jpg") no-repeat center fixed;
-webkit-background-size: cover; /* pour Chrome et Safari */
-moz-background-size: cover; /* pour Firefox */
-o-background-size: cover; /* pour Opera */
 background-size: cover; /* version standardisée */
 }

body
{
 width: 70%;
 margin: auto;
 margin-top: 20px;
 margin-bottom: 20px;
 }
 
 #en_tete
 {
 width: 750px;
 height: 238px;
 background-image: url("Images/banniere.png");
 background-repeat: no-repeat;
 margin-bottom: 10px;
 margin-left: auto;
 margin-right:auto;
 }
 
 #menu
 {
 float: left;
 width: 230px;
 background-color: rgba(0,0,0,0.6);
 border-radius: 15px;
 background-repeat: repeat-x;
 margin-bottom: 20px;
 text-align: left;
 margin-right: 20px;
 }
 
 #menu_titre
 {
 color : white;
 font-family: PR Uncl Alt Caps, "Times New Roman", Times, serif;
 text-align: center;
 }
 
 #menu ul
 {
 font-family: Book antiqua, "Times New Roman", Times, serif;
 }
 
 #menu a
 {
 color: rgb(21, 180, 255);
 text-decoration:none;
 }
 
 #menu a:hover
 {
 background-color: rgba(150,0,255,0.58);
 color: white;
 }
 
 #menu a:focus
 {
 background-color: rgba(150,0,255,0.58);
 color: blue;
 }
 
 a:hover
 {
 background-color: rgba(150,0,255,0.58);
 color: white;
 }
 
 a:focus
 {
 background-color: rgba(150,0,255,0.58);
 }

 #corps a:link
 {
 background-color:black;
 color:white; 
 border-radius: 5px;
 text-decoration:none;
 }
 
 #corps a:hover
 {
 background-color: rgba(150,0,255,0.58);
 color: white;
 }
 
 #corps a:focus
 {
 background-color: rgba(150,0,255,0.58);
 }
 
   #corps a:visited
 {
 color:white; 
 }
 
 #corps
 {
 overflow:hidden;
 font-family: Book antiqua, "Times New Roman", Times, serif;
 text-align: center;
 margin-left: 170px;
 margin-bottom: 40px;
 padding: 5px;
 color: black;
 font-weight: bold;
 background-color: rgba(255,255,255,0.5);
 border-radius: 30px;
 }
 
 #pied_de_page
 {
 text-align: right;
 color: cyan;
 }
 
 #selection input
 {
 background-color:black;
 color:white; 
 border-radius: 5px;
 text-decoration:none;
 }