*{
    padding: 0;
    margin: 0;
}
.ArrierePlan {
    height: 100vh;
    width: 100%;
    background-image: url(media/BordeauxFMDescktop.png);
    background-size: cover;
    position: relative;
    background-position: center;

}
.player {
position: fixed; 
bottom: 40px;
display: flex;
justify-content: center;
width: 100%;
} 
@media screen and (max-width:650px) {
    .ArrierePlan {
        background-image: url(media/BordeauxFMMobile.png);
    }
}