import 'package:flutter/material.dart';

/// UI 样式规范（《01-开发文档》5.4）：深色沉浸 + 品牌红/青 + 会员金
class AppColors {
  AppColors._();

  static const Color background = Color(0xFF121212);
  static const Color surface = Color(0xFF1E1E1E);
  static const Color primary = Color(0xFFFE2C55); // 品牌红
  static const Color secondary = Color(0xFF25F4EE); // 辅助青
  static const Color textPrimary = Color(0xFFFFFFFF);
  static const Color textSecondary = Color(0xFFB0B0B0);
  static const Color textWeak = Color(0xFF6E6E6E);
  static const Color gold = Color(0xFFF7D794);
  static const Color goldDeep = Color(0xFFD4A017);

  /// 会员金色渐变
  static const LinearGradient goldGradient = LinearGradient(
    colors: [gold, goldDeep],
  );
}

/// 全局深色主题
class AppTheme {
  AppTheme._();

  static ThemeData get dark => ThemeData(
        useMaterial3: true,
        brightness: Brightness.dark,
        scaffoldBackgroundColor: AppColors.background,
        colorScheme: const ColorScheme.dark(
          primary: AppColors.primary,
          secondary: AppColors.secondary,
          surface: AppColors.surface,
        ),
        appBarTheme: const AppBarTheme(
          backgroundColor: AppColors.background,
          elevation: 0,
          centerTitle: true,
        ),
        inputDecorationTheme: InputDecorationTheme(
          filled: true,
          fillColor: AppColors.surface,
          border: OutlineInputBorder(
            borderRadius: BorderRadius.circular(8),
            borderSide: BorderSide.none,
          ),
          hintStyle: const TextStyle(color: AppColors.textWeak),
        ),
        elevatedButtonTheme: ElevatedButtonThemeData(
          style: ElevatedButton.styleFrom(
            backgroundColor: AppColors.primary,
            foregroundColor: AppColors.textPrimary,
            minimumSize: const Size.fromHeight(48),
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
            textStyle: const TextStyle(fontSize: 16, fontWeight: FontWeight.w600),
          ),
        ),
        dividerColor: AppColors.textWeak.withValues(alpha: 0.2),
      );
}