/* (A) GALLERY CONTAINER */


/* (A1) ON BIG SCREENS */

.gallery {
    display: grid;
    grid-template-columns: repeat(3, auto);
    /* 3 IMAGES PER ROW */
    grid-gap: 10px;
    max-width: 1200px;
    margin: 0 auto;
    /* HORIZONTAL CENTER */
}


/* (A2) ON SMALL SCREENS */

@media screen and (max-width: 640px) {
    .gallery {
        grid-template-columns: repeat(2, auto);
        /* 2 IMAGES PER ROW */
    }
}


/* (B) THUMBNAILS */

.gallery img {
    width: 100%;
    height: 200px;
    cursor: pointer;
    /* FILL, CONTAIN, COVER, SCALE-DOWN : USE WHICHEVER YOU LIKE */
    object-fit: cover;
}

.gallery img:fullscreen {
    object-fit: cover;
}


/* (X) DOES NOT MATTER */

body,
html {
    padding: 0;
    margin: 0;
}