html { 
margin:0;
padding:0;
background: url(images/fond.jpg) no-repeat center fixed; 
-webkit-background-size: cover; /* pour anciens Chrome et Safari */
background-size: cover; /* version standardisée */
color:#001f48;
font-family: Helvetica;
font-size: 16px;
letter-spacing: 0px;
}

IMG.displayed {
position: absolute;
z-index:-10;
top: 20%;
left: 50%;
width: 337px;
height: 143px;
margin-top: -170px; /* Half the height */
margin-left: -180px; /* Half the width */
	}
.email{
text-align: center;
margin-top: 17vh; /* poussé de la moitié de hauteur de viewport */
transform: translateY(50%); /* tiré de la moitié de sa propre hauteur */

}
a{
color:#001f48;
font-family: Helvetica;
font-size: 16px;
letter-spacing: 1px;
//text-shadow: 2px 2px 3px #fff;
}
a:hover{
color:#fff;
font-family: Helvetica;
font-size: 16px;
letter-spacing: 1px;
 text-decoration: none;
text-shadow: 2px 2px 3px #aa7a4c;
}