#mask {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    visibility: hidden;
    z-index: -2;
    background: #000;
    background: rgba(0,0,0,0.8);
    overflow: hidden;
    opacity: 0;
    transition: all .5s ease-in-out;
}

#mask.showing {
    opacity: 1;
    z-index: 9000;
    visibility: visible;
    overflow: auto;
    transition: all .5s ease-in-out;
}

#boxes {
    display: table;
    width: 100%;
    height: 100%;
}

.window {
    max-width: 100%;
    z-index: 9999;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    margin: auto;
    background-color: white;
    opacity: 0.6;
    font-family: 'Segoe UI Light', sans-serif;
    font-size: 15pt;
}

    .window img {
        width: 100%;
        height: auto;
    }

.inner {
    display: table-cell;
    vertical-align: middle;
}

#popupfoot {
    font-size: 16pt;
}

.showImage {
    margin: 0 0 3em;
    display: table;
    text-align: center;
    padding: 10px;
}

    .showImage img {
        display: block;
    }