div#gallery {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

#gallery .gallery-display img {
    max-width: 100%;
}

@media screen and (min-width: 1080px) {
    #gallery .gallery-display {
        width: 25%;
    }
}
@media screen and (max-width: 1079px) and (min-width: 800px){
    #gallery .gallery-display {
        width: 50%;
    }
}
@media screen and (max-width: 799px){
    #gallery .gallery-display {
        width: 100%;
    }
}