#rocola-coupon-form input.error-border {
    border: 2px solid red;
}
#rocola-coupon-message {
    margin-top: 10px;
    font-size: 14px;
    font-weight: bold;
}
#rocola-coupon-message.success {
    color: green;
}
#rocola-coupon-message.error {
    color: red;
}