@media (min-width: 960px)
{
    .lex-web-ui-iframe {
        min-width: calc(40vw - 3vw) !important;
    }
}

@media only screen and (min-width: 481px) and (max-width: 960px){
    .lex-web-ui-iframe {
        min-width: 90vw;
    }
}