lib/widgets/
├── {component_name}/
│   ├── {component_name}.dart        # 컴포넌트 구현
│   └── {component_name}_styles.dart # 스타일 클래스

// 1. 기본 스타일 사용
MyComponent()

// 2. 커스텀 스타일 사용
MyComponent(
  style: MyComponentStyle.defaultStyle.copyWith(
    backgroundColor: Colors.blue,
  ),
)

mkdir lib/widgets/{new_component}

// lib/widgets/{new_component}/{new_component}_styles.dart
import 'package:flutter/material.dart';

class NewComponentStyle {
  final Color backgroundColor;

  const NewComponentStyle({
    this.backgroundColor = Colors.white,
  });

  static const NewComponentStyle defaultStyle = NewComponentStyle();

  NewComponentStyle copyWith({Color? backgroundColor}) {
    return NewComponentStyle(
      backgroundColor: backgroundColor ?? this.backgroundColor,
    );
  }
}

// lib/widgets/{new_component}/{new_component}.dart
import 'package:flutter/material.dart';
import '{new_component}_styles.dart';

class NewComponent extends StatelessWidget {
  final NewComponentStyle style;

  const NewComponent({
    super.key,
    this.style = NewComponentStyle.defaultStyle,
  });

  @override
  Widget build(BuildContext context) {
    return Container(color: style.backgroundColor);
  }
}