.bandeau-article .colonne{
    align-self: center;
}

.bloc_mise_avant > div {
    z-index:2;
}

.text-center{
    text-align:center;
}
.text-right{
    text-align:right;
}
.text-left{
    text-align:left;
}


.bloc_sur_fond_de_couleur::before {
    content: '';
    background-color: var(--background-alt-grey);
    width: 100vw;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 0;
    margin-left: calc( -100vw / 2 + 100% / 2 - 16px / 2);
    margin-right: calc( -100vw / 2 + 100% / 2 + 16px / 2);
}

.spip_documents >a.lien-undocument{
    display: flex;
}

.bandeau-article .colonne{
    padding:3em 0;
}
#bandeau_sommaire{
    position:relative;
    height: 350px;
    overflow: hidden;
    padding :50px 0;
}
#bandeau_sommaire .image-background {
    position: absolute;
    top: 0;
    width: 100%;
    height: 350px;
    max-height: 400px;

    background-position:center center;
    background-repeat: no-repeat;
    background-size: cover;
}