main .image-popup { display: none; }

main .image-popup.show { 
    display: block;
    position: fixed;
    z-index: 1000;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, .4);
}

main .image-popup .image-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    max-width: 80vw;
    max-height: 80vh;
    width: fit-content;
    height: fit-content;
    padding: 2vw;
    background-color: #fff;
    border-radius: 5px;
}

main .image-popup .image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    max-height: calc(80vh - 8vw);
    max-width: 72vw;
}

main .image-popup .image-wrapper .caption {
    color: #666;
    font-size: 14px;
    padding: 1rem 4rem 0 4rem;
    text-align: center;
    width: 100%;
    line-height: 1.5em;
    display: block;
}