html{
background-image: url(fond_1.jpg) ; 
background-position: 50%
}

h1 {
color: Black;
font-weight: bold ; 
font-size: 240%;
text-align: center;


}

h2 {
color: Black;
font-weight: bold ; 
font-size: 250%;
text-align: center;
border: 2px black solid;
box-shadow: 6px 6px 6px black;
}
 
#contenue {
margin-right: 70px ;
margin-left : 55px;
text-align: left ;
font-family:Calibri Light;
}
.photo{
	margin: 1px 19px 25px 6px;
	border :2px black solid; 
	
}
.imagedroite{
	margin: 10px 19px 25px 6px;
	border :2px black solid; 
	
}
.imagecentrale{
	margin: 10px 19px 25px 6px;
	border :2px black solid; 
	width: 520px;
}
#banner1 {
	display: block;
	background-color: #c4cde0;
	height:50px ;
	width: 100%;
	
}

#banner2 {
	display: block;
	background-color: #c4cde0 ;
	height:20px ;
	width: 100%;
border: 1px black solid;
}
#sommaire{
	width: 100%;
	height: 120px;
	position: relative; 
	background-color:#3B5998;
	border: 1px black solid;
}
#sommaire ul{
	float:left;
	left: 50%;
	position: relative;
	padding-top: 15px;
	margin-left: -60px;
}
#sommaire ul li{
	float : left ;
	list-style-type: none; 
	margin-left: 30px;
	position: relative;
	left: -50%;
}
#sommaire ul li a {
	display: inline-block;
	text-align: center;
	padding-top: 10px;
	background-color: #c4cde0;
	height: 50px;
	width: 100px;
	text-decoration: none;
	color: black;
	border: 1px black solid;
}
#sommaire ul li a:hover {
color : black ;
	background-color: #FFFAFA;
}