.barre_de_navigation{
    background-color: orange;
    color: orange;
    width: 20vw;
    height: 100vh;
    position: absolute;
    right: 0;
    top: 0;
}
.categorie{
    background-color: beige;
    font-size: 20px;
    font-family:Arial, Helvetica, sans-serif;
    font-weight: bold;
}