.popup-hidden {
    display: none !important;
}
#error-popup {
    background-color: rgba(128, 128, 128, 0.7); 
    position: absolute;  
    height: 100vh;  
    width: 100vw;  
    z-index: 200;
}
#error-popup-box {
    cursor: default;  
    width: 400px;  
    background-color: #FFFFE0;
}
#error-popup .btn {
    width: 100px;
}