.acf-wysiwyg-gallery {
    column-count: 2;
    column-gap: 5px;
    line-height: 0;
}

@media (min-width: 600px) {
    .acf-wysiwyg-gallery {
        column-count: 3;
    }
}

@media (min-width: 900px) {
    .acf-wysiwyg-gallery {
        column-count: 4;
    }
}

.acf-wysiwyg-gallery a {
    display: inline-block;
    margin: 0 0 5px;
    border-radius: 5px;
    overflow: hidden;
    width: 100%;
    break-inside: avoid;
}

.acf-wysiwyg-gallery img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 5px;
    margin: 0;
}