div.popup {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: fixed;
    z-index: 250;
    padding: 0;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: black;
    background-color: rgba(0, 0, 0, 0.85);
}

img.popImg {
    margin: auto;
    max-width: 90vw;
    max-height: 80vh;
    display: block;
    border-radius: 12px;
}

div#popCaption {
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    font-size: 14pt;
}

.popImg,
#popCaption {
    animation: zoom 0.6s;
}

@keyframes zoom {
    from {
        transform: scale(0);
    }

    to {
        transform: scale(1);
    }
}

#popClose {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}

#popClose:hover,
#popClose:focus {
    color: #bbb;
    cursor: pointer;
}