body{
    position: fixed;
    top: 0;
    left: 0;
    min-width: 100%;
    min-height: 100%;
}

html {
    height:100%;
    width:100%;
    overflow: hidden;
    margin:0;
    padding:0;
}
 
html, html img.imghtml, html span.imghtml{
    height:100%;
    width:100%;
    left:0;
    top:0;
    position:absolute;
}
 
html, html *{
    position:relative;
    z-index:0;
}

h1{
    text-align: center;
    color: white;
}

h2{
    text-align: center;
    color: white;
}

#lien{
    margin-left: 44%; 
    opacity: 0;
    position: fixed;
    bottom: 25%;
}