@media only screen and (max-width: 850px) {

    .contenitore-banner, .contenitore-contenuto {width:100%
    }

    .divLogin {width: 90%; float:none; padding:5%}

        .divLogin input[type="text"], .divLogin input[type="password"]{width:90%;
    }

    .accountLogin {border-right-width:0px
    }
}