.sisma-galleria {
    columns: 4;
    column-gap: 0;
    inline-size: 100%;
}

.sisma-galleria__item {
    break-inside: avoid;
    margin-block-end: 0;
}

.sisma-galleria__item a {
    display: block;
    cursor: zoom-in;
}

.sisma-galleria__item img {
    width: 100%;
    height: auto;
    display: block;
    transition: opacity 0.2s ease;
}

.sisma-galleria__item a:hover img {
    opacity: 0.88;
}

@media (max-width: 1024px) {
    .sisma-galleria { columns: 3; }
}

@media (max-width: 768px) {
    .sisma-galleria { columns: 2; }
}

@media (max-width: 480px) {
    .sisma-galleria { columns: 1; }
}