Siticone Credit Card UI

// Flips the card from Front to Back or vice-versa.
// Useful when the user focuses the CVV input field.
creditCard1.FlipCard(true);

// Triggers a flashing red error state with a message overlay.
// Used when validation fails (e.g., Luhn algorithm check).
creditCard1.TriggerError("Invalid Card Number");

// Manually add colors to the animation cycle
creditCard1.ClearCycleColors();
creditCard1.AddCycleColor(Color.Blue);
creditCard1.AddCycleColor(Color.Purple);
creditCard1.AddCycleColor(Color.Red);
creditCard1.CycleColors = true;

public enum SiticoneCreditCardType
{
    Generic, Visa, VisaElectron, MasterCard, AmericanExpress, Discover, JCB, Maestro,
    DinersClub, UnionPay, BankCard, Dankort, Elo, Mir, RuPay, Verve, Troy,
    InterPayment, InstaPayment, Switch, Solo, Laser, UATP
}

public CheckoutForm()
{
                InitializeComponent();
    
                // Bind TextChanged events
    txtCardNumber.TextChanged += (s, e) => cardUI.CardNumber = txtCardNumber.Text;
    txtName.TextChanged += (s, e) => cardUI.CardholderName = txtName.Text;
    txtExp.TextChanged += (s, e) => cardUI.ExpirationDate = txtExp.Text;
    txtCVV.TextChanged += (s, e) => cardUI.CVV = txtCVV.Text;
    
                // Auto-Flip logic
    txtCVV.GotFocus += (s, e) => 
    {
                if (cardUI.View == CardSide.Front) cardUI.FlipCard();
    };
    
    txtCVV.LostFocus += (s, e) => 
    {
                if (cardUI.View == CardSide.Back) cardUI.FlipCard();
    };
}

private void BtnPay_Click(object sender, EventArgs e)
{
                string number = cardUI.CardNumber.Replace(" ", "");
    
                // Basic validation check
                if (number.Length < 16)
    {
                // Visually shake the card (if ReadOnly/Blocked logic applies)
                // Or trigger the error state directly
        cardUI.TriggerError("Incomplete Number");
                return;
    }
    
                // Check expiry
                if (IsExpired(cardUI.ExpirationDate))
    {
        cardUI.TriggerWarning(3000, "Card Expired");
                return;
    }
    
                ProcessPayment();
}

private void ApplyGoldTheme()
{
    cardUI.CardStartColor = Color.Goldenrod;
    cardUI.CardEndColor = Color.DarkGoldenrod;
    cardUI.TextColor = Color.Black;
    cardUI.LabelColor = Color.FromArgb(60, 60, 60);
    cardUI.ShowGlassEffect = true;
    cardUI.GlassOpacity = 0.4f;
    cardUI.ShowReflection = true;
    cardUI.CornerRadius = 18;
}