#theme-popup, #theme-popup-shortcode {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 9999;
}

.popup-content {
       max-width: 500px;
    margin: 10% auto;
 
}

#popup-close, #popup-close-shortcode {
    position: absolute;
    top: 5px;
    right: 10px;
    cursor: pointer;
    font-size: 20px;
}