import 'package:flutter/material.dart';

abstract final class AppColors {
  static const paper = Color(0xFFF5F7F3);
  static const surface = Colors.white;
  static const surfaceMuted = Color(0xFFF1F5F0);
  static const ink = Color(0xFF19211B);
  static const muted = Color(0xFF647268);
  static const line = Color(0xFFD8E1D9);
  static const green = Color(0xFF176B46);
  static const softGreen = Color(0xFFE2F3E8);
  static const warm = Color(0xFFFFF0E3);
  static const warmInk = Color(0xFF9E4C18);
}

ThemeData buildAppTheme() {
  final scheme =
      ColorScheme.fromSeed(
        seedColor: AppColors.green,
        brightness: Brightness.light,
      ).copyWith(
        surface: AppColors.surface,
        onSurface: AppColors.ink,
        primary: AppColors.green,
        onPrimary: Colors.white,
        outline: AppColors.line,
      );

  return ThemeData(
    useMaterial3: true,
    colorScheme: scheme,
    scaffoldBackgroundColor: AppColors.paper,
    fontFamily: 'PingFang SC',
    appBarTheme: const AppBarTheme(
      backgroundColor: AppColors.surface,
      foregroundColor: AppColors.ink,
      elevation: 0,
      centerTitle: false,
    ),
    textTheme: const TextTheme(
      headlineMedium: TextStyle(
        color: AppColors.ink,
        fontSize: 26,
        height: 1.25,
        fontWeight: FontWeight.w600,
        letterSpacing: -0.6,
      ),
      titleLarge: TextStyle(
        color: AppColors.ink,
        fontSize: 18,
        fontWeight: FontWeight.w600,
      ),
      bodyLarge: TextStyle(color: AppColors.ink, fontSize: 16, height: 1.5),
      bodyMedium: TextStyle(color: AppColors.muted, fontSize: 14, height: 1.5),
    ),
  );
}