ghost/core/core/frontend/src/cards/css/gallery.css

.kg-gallery-card,
.kg-gallery-card * {
    box-sizing: border-box;
}

.kg-gallery-card,
.kg-image-card {
    --gap: 1.2rem;
}

.kg-image-card:not(.kg-card-hascaption) + .kg-image-card,
.kg-image-card:not(.kg-card-hascaption) + .kg-gallery-card,
.kg-gallery-card:not(.kg-card-hascaption) + .kg-image-card,
.kg-gallery-card:not(.kg-card-hascaption) + .kg-gallery-card {
    margin-top: var(--gap);
}

.kg-gallery-container {
    position: relative;
}

.kg-gallery-row {
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.kg-gallery-image img {
    display: block;
    margin: 0;
    width: 100%;
    height: 100%;
}

.kg-gallery-row:not(:first-of-type) {
    margin: var(--gap) 0 0;
}

.kg-gallery-image:not(:first-of-type) {
    margin: 0 0 0 var(--gap);
}

@media (max-width: 600px) {
    .kg-gallery-card,
    .kg-image-card {
        --gap: 0.6rem;
    }
}