html,body{
    height:100%;
    background-image: url("../images/fond.jpg");

}


video{
    z-index: 0;
    left: 50%;
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
}



.center {
    text-align:center;
    min-height: 100%;
    margin: auto;
    display:table;
    vertical-align: middle;
}

#choix{
    position: absolute;
    top: 350px;
    width: 100%;
    visibility: hidden;

}

#choix1{
    background-color: #fff;
}

#choix2{
    background-color: #fff;
}

#commencer{
    text-align:center;
}