.wp_gallery_advanced_img100 {
    width: 100%;
    height: auto;
}

.wp_gallery_advanced_flex {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
}

.wp_gallery_advanced_slider {
    margin: 0 -7px;
}
.wp_gallery_advanced_thumbnails {
    margin: 0 -15px;
}
.wp_gallery_advanced_thumbnails .wp_gallery_advanced_single_thumb_wrapper {
    padding: 0 15px;
    margin-bottom: 30px;
    box-sizing: border-box;
}

.wp_gallery_advanced_single_thumb_wrapper {
    flex: 0 0 calc(100% / var(--columns));
}

/* Default columns settings */
.wp_gallery_advanced_thumbnails[data-columns="1"] {
    --columns: 1;
}
.wp_gallery_advanced_thumbnails[data-columns="2"] {
    --columns: 2;
}
.wp_gallery_advanced_thumbnails[data-columns="3"] {
    --columns: 3;
}
.wp_gallery_advanced_thumbnails[data-columns="4"] {
    --columns: 4;
}
.wp_gallery_advanced_thumbnails[data-columns="6"] {
    --columns: 6;
}

/* Media Queries */
@media (max-width: 1280px) {
    .wp_gallery_advanced_thumbnails[data-columns="6"] {
        --columns: 3;
    }
}
@media (max-width: 1024px) {
    .wp_gallery_advanced_thumbnails[data-columns="3"],
    .wp_gallery_advanced_thumbnails[data-columns="4"],
    .wp_gallery_advanced_thumbnails[data-columns="6"] {
        --columns: 2;
    }
}
@media (max-width: 768px) {
    .wp_gallery_advanced_thumbnails[data-columns="2"],
    .wp_gallery_advanced_thumbnails[data-columns="3"],
    .wp_gallery_advanced_thumbnails[data-columns="4"],
    .wp_gallery_advanced_thumbnails[data-columns="6"] {
        --columns: 1;
    }
}