.popup-patch {
    display: none;
    position: fixed;
    z-index: 1;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.5);
    color: white;
    width: 300px;
    padding: 20px;
    text-align: center;
}