Resonds format for MailChimp4WordPress Plugin in combination with bootstrap 3.3.6

mailchimp4wordpress.scss

#newsletter-form {
    color: white;
    input {
        border-radius: 0px !important;
    }
    .mc4wp-response {
        text-align: center;
        @extend .container;
        margin: 15px 0px;
        .mc4wp-alert,
        .mc4wp-success,
        .mc4wp-error {
            @extend .well-sm;
            @extend .col-md-10;
            @extend .col-md-offset-1;
            border-radius: 0px;
        }
        .mc4wp-alert {
            @extend .alert-warning;
        }
        .mc4wp-success {
            @extend .alert-success;
        }
        .mc4wp-error {
            @extend .alert-warning;
        }
    }
}