#lightbox {
    position: fixed;
    z-index: 1000;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .8);
    display: none;
}

    #lightbox.active {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    #lightbox img {
        max-width: 90%;
        max-height: 80%;
        padding: 4px;
        background-color: black;
        border: 2px solid white;
    }