input.wpcf7-not-valid{
    border: 2px solid #ff0000 !important
    }
    .screen-reader-response, span.wpcf7-not-valid-tip{
    display: none !important;
    }
   form.invalid .wpcf7-response-output {
        font-size: 22px;
        color: #ff0000 !important;
        }