.mobile_scanner_container{
    width: 100vw;
    height: 100vh;

}


 #preview{
    margin-left: auto;
    margin-right: auto;
    width: 100%;
    height:calc(100vh - 5rem);
    display: grid;
    place-items: center;
}

#preview video{
    width: 100%!important;
    height: 100%!important;
}

#preview canvas{
    width: 100%!important;
    height: 100%!important;
}