extension Color {
    static let appPrimary = Color("AppPrimary")
    static let appSecondary = Color("AppSecondary")
    static let appBackground = Color("AppBackground")
    
    // Fallback for older iOS versions
    static let appText = Color.primary
    static let appSubtext = Color.secondary
}

// Usage in views
struct ContentView: View {
    var body: some View {
        VStack {
            Text("Main Title")
                .foregroundColor(.appText)
            Text("Subtitle")
                .foregroundColor(.appSubtext)
        }
        .background(Color.appBackground)
    }
}