body { 
  margin:0;
  padding:0; 
    background: url(couvnb.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 */
  z-index:-20;

}



.h1
{	
	font-weight: normal;
    color: white;	
	font-size: 30px;
	font-family: arial;
	position: fixed;
	top:0px;	
	left: 25px;
	z-index: 5; 
	text-align: centered;

}




.projets
{	
	font-weight: normal;
    color: white;	
	font-size: 18px;
	font-family: arial;
	position: fixed;
	top:20px;	
	left: 500px;
	z-index: 5; 
	text-align: centered;

}

.atelier
{	
	font-weight: normal;
    color: white;	
	font-size: 18px;
	font-family: arial;
	position: fixed;
	top: 20px;	
	left: 650px;
	z-index: 5; 
	text-align: centered;

}

.contact
{	
	font-weight: normal;
    color: white;
	font-size: 18px;
	font-family: arial;
	position: fixed;
	top: 20px;	
	left: 800px;
	z-index: 5; 
	text-align: centered;

}

.mobile
{	
	font-weight: normal;
    color: white;
	font-size: 20px;
	font-family: arial;
	position: fixed;
	bottom: 7px;	
	left: 130px;
	z-index: 5; 
	text-align: centered;

}
  .png {

	bottom: 18px;
	left: 35px;
	z-index: 10;
	position: fixed

 }