.bro_galerie {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    margin-top:10px;
}
.bro_conteneur_img {
    width: 960px;
    height: 520px;
    background-color: whitesmoke;
    border: 1px solid black;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding:5px;
    margin-bottom: 10px;
}
.bro_conteneur_img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.bro_loading {
    background: url('loading_128x15.gif') center center no-repeat;
    background-size: auto;
}