import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Column(
          children: [
            Expanded(child: Top()),
            Expanded(child: Bottom()),
          ],
        ),
      ),
    );
  }
}

class Top extends StatefulWidget {
  const Top({super.key});

  @override
  State<Top> createState() => _TopState();
}

class _TopState extends State<Top> {
  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Top1(),
        Top2(),
      ],
    );
  }
}

class Top1 extends StatelessWidget {
  const Top1({
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return Expanded(
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text("Top 1", style: TextStyle(fontSize: 40, fontWeight: FontWeight.bold)),
            Text("num : 1", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold))
          ],
        ),
      ),
    );
  }
}

class Top2 extends StatelessWidget {
  const Top2({
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return Expanded(
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text("Top 2", style: TextStyle(fontSize: 40, fontWeight: FontWeight.bold)),
            ElevatedButton(onPressed: (){}, child: Icon(Icons.add))
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Text("Bottom", style: TextStyle(fontSize: 40, fontWeight: FontWeight.bold)),
        ],
      ),
    );
  }
}