html,body{
    margin:0;
}


body {
    background-image: url("../img/image-fond.jpg");
    background-size: 150%;
    background-repeat: no-repeat;
}



 a {
    text-decoration: none;
    color: white;
}



@media screen and (max-width: 900px) {
    
    body {
    background-image: url("../img/image-fond.jpg");
    background-size: 250%;
    background-repeat: no-repeat;
}
}

@media screen and (max-width: 500px) {
    
    body {
    background-image: url("../img/image-fond.jpg");
    background-size: 300%;
    background-repeat: no-repeat;
}
}