.background_image{
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 400px;
    background-size: cover!important;
    background-position: center!important;
}

.webwrapper.realisations{color: white;}

.webwrapper.realisations .realisation_image{
    display: block;
    width: 100%;
    margin: 20px 0;
}

.gallery_grid{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-gap: 1em;
    margin: 1em 0;
}

.gallery_grid a{
    display: block;
}

.gallery_grid a img{
    width: 100%;
    display: block;
}