#gallery_container {
    display: flex;
    justify-content: space-evenly;
    padding: 60px;
    flex-wrap:wrap;
    row-gap: 20px
}

#gallery_container h2 {
    width: 100%;
    margin-top:50px;
    margin-bottom:20px;
}

@media only screen and (min-width: 880px) {
    #gallery_container a {
        flex: 0 0 30%;
    }
}

@media only screen and (max-width: 880px) and (min-width: 640px) {
    #gallery_container a {
        flex: 0 0 48%;
    }
}

@media only screen and (max-width: 640px){
    #gallery_container a {
        flex: 0 0 100%;
    }
}



#gallery_container img {
    width: 100%;
}