CSS

.col-3 {
    width: 20%;
    text-align: right;
    display: inline-block;
    vertical-align: top;
    margin: 20px 0 0 0;
}

.col-9 {
    width: 80%;
    display: inline-block
}

#add_gallery_to_product {
    padding: 5px 16px;
    height: initial;
    outline: none;
    font-size: 1.1em;
}

#seutema-page-gallery {
    display: block;
    margin-top: 10px;
}

#seutema-page-gallery .gallery-item {
    display: inline-block;
    padding: 0 10px;
    width: 20%;
    margin: 0 0 10px 0;
    box-sizing: border-box;
    text-align: center;
}

#seutema-page-gallery .gallery-item img {
    max-width: 100%;
}

#seutema-page-gallery .gallery-caption {
    display: none!important;
}