#popupModal img {
    margin: 0;
    max-height: 100%;
}

#popupModal .btn-close {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 77;
    padding: 0.25rem 0.25rem;
    margin: 6px;
    border-radius: 50%;
    width: 26px;
    height: 26px;
    background-color: #f3f3f3;
}

@media (min-width: 768px) {
    #popupModal img {
        max-height: calc(100vh - 4rem);
    }

    #popupModal .modal-dialog {
        -webkit-box-pack: center;
        -ms-flex-pack: center;
        justify-content: center;
        min-height: 0;
        height: 100%;
        width: 92%;
        max-width: 1080px;
        padding: 2rem 1.5rem;
        margin: auto;
    }

    #popupModal .modal-content {
        width: auto;
        display: block;
    }
}