#lightbox_main header {
    padding: 15px 0;
    text-align: center;
}
#lightbox_main h1 {
    margin: 0;
    font-size: 3em;
}
#lightbox_main h2 {
    margin-left: 10px;
}
#lightbox_main ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}
#lightbox_main li {
    margin: 2px;
}
#lightbox_main a {
    display: block;
}
#lightbox_main li img {
    display: block;
    width: 100%;
}