import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  double _sliderValue = 0.5;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        sliderTheme: const SliderThemeData(
          padding: EdgeInsets.symmetric(vertical: 4.0),
          thumbColor: Colors.red,
          inactiveTrackColor: Colors.amber,
        ),
      ),
      home: Scaffold(
        body: Directionality(
          textDirection: TextDirection.ltr,
          child: Center(
            child: Card(
              shape: const RoundedRectangleBorder(
                borderRadius: BorderRadius.all(Radius.circular(4.0)),
              ),
              color: Theme.of(context).colorScheme.surfaceContainerHighest,
              margin: const EdgeInsets.symmetric(horizontal: 16.0),
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    const Placeholder(fallbackHeight: 100.0),
                    Slider(
                      value: _sliderValue,
                      onChanged: (double value) {
                        setState(() {
                          _sliderValue = value;
                        });
                      },
                    ),
                    const Placeholder(fallbackHeight: 100.0),

                  ],
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}