.photosGallery {
    /* Prevent vertical gaps */
    line-height: 0;

    -webkit-column-count: 4;
    -webkit-column-gap:   10px;
    -moz-column-count:    4;
    -moz-column-gap:      10px;
    column-count:         4;
    column-gap:           10px;
}

.photosGallery a {
    text-decoration: none;
    border-bottom: none;
}

.photosGallery img {
    /* Just in case there are inline attributes */
    width: 100% !important;
    height: auto !important;
}

@media (max-width: 1200px) {
    .photosGallery {
        -moz-column-count:    4;
        -webkit-column-count: 4;
        column-count:         4;
    }
}
@media (max-width: 1000px) {
    .photosGallery {
        -moz-column-count:    3;
        -webkit-column-count: 3;
        column-count:         3;
    }
}
@media (max-width: 800px) {
    .photosGallery {
        -moz-column-count:    2;
        -webkit-column-count: 2;
        column-count:         2;
    }
}
@media (max-width: 400px) {
    .photosGallery {
        -moz-column-count:    1;
        -webkit-column-count: 1;
        column-count:         1;
    }
}