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import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Calculator',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
  
    return Scaffold(
      appBar: AppBar(
        
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Expanded(
              child: Container(
                color: Theme.of(context).primaryColor,
                child: Align(
                  alignment: Alignment.centerRight,
                  child: Padding(
                    padding: const EdgeInsets.all(10.0),
                    child: Text('0',
                    style: Theme.of(context).textTheme.displayLarge!.copyWith(color: Colors.white),
                    ),
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}