.visuelrachis {
    max-height: 45vh;
    display: flex;
    flex-direction: row;
    justify-content: center;
    background-repeat: no-repeat;
    background-size: auto 30%;
    background-position: center;
    /* background-color: yellow; */
    /* flex: 1; */

}

.visuelrachis img {
    max-height: 45vh;
}