.popup #qr-code{
width:30%;
            
}
div#popup {
    display: none;
    position: fixed;
    top: 20%;
    left: 23%;
    width: 55%;
    height: auto;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    margin: auto;
}
@media only screen and (max-width: 768px){
        div#popup {
    
   
    width: 100vw;
   left:0;
}
        .popup #qr-code{
            width: 80%;
    display: inherit;
    margin: auto;}
}