.ctct-popup-content button.ctct-popup-close {
    padding:1px 6px;
}
.ctct-form-popup.form_0 .ctct-form-defaults .ctct-form-header {
    text-transform: none;
}

@media (max-width:600px) {
    .ctct-form-popup.form_0 .ctct-form-defaults .ctct-form-header {
        font-size:20px;
    }
    #ctct_form_0 .ctct-form-text,
    #ctct_form_0 .ctct-form-field,
    #ctct_form_0 .ctct-gdpr-text {
        margin-bottom: 12px;
    }
}