struct CustomProgressViewStyle: ProgressViewStyle {
    func makeBody(configuration: Configuration) -> some View {
        VStack {
            ZStack {
                Circle()
                    .stroke(Color.gray.opacity(0.3), lineWidth: 4)
                Circle()
                    .trim(from: 0, to: configuration.fractionCompleted ?? 0)
                    .stroke(Color.blue, style: StrokeStyle(lineWidth: 4, lineCap: .round))
                    .rotationEffect(.degrees(-90))
            }
            .frame(width: 40, height: 40)
            
            if let label = configuration.label {
                label
                    .font(.caption)
                    .foregroundColor(.secondary)
            }
        }
    }
}

struct LoadingView: View {
    @State private var progress = 0.0
    
    var body: some View {
        VStack(spacing: 20) {
            ProgressView("Loading...", value: progress, total: 1.0)
                .progressViewStyle(CustomProgressViewStyle())
            
            ProgressView("Processing...")
                .progressViewStyle(CustomProgressViewStyle())
        }
        .onAppear {
            simulateProgress()
        }
    }
    
    private func simulateProgress() {
        Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true) { timer in
            progress += 0.05
            if progress >= 1.0 {
                timer.invalidate()
            }
        }
    }
}