html { 
	margin:0;
	padding:0;
	background: url('vautour-corniches-du-mejean.jpg') no-repeat center fixed; 
	-webkit-background-size: cover;
	background-size: cover;
}
body {
	background-color:inherit;
}

.reponse {
	background-color:#FFFFFF;
	opacity:0.9;
	padding:10px;
}