ai-contract-platform/mobile/lib/app/theme/app_theme.dart

import 'package:flutter/material.dart';

import 'brand_assets.dart';

class AppTheme {
  const AppTheme._();

  static ThemeData light() {
    const textColor = BrandAssets.ink;

    final colorScheme = ColorScheme.fromSeed(
      seedColor: BrandAssets.brand,
      brightness: Brightness.light,
    ).copyWith(
      primary: BrandAssets.brand,
      secondary: BrandAssets.mint,
      tertiary: BrandAssets.accentAmber,
      surface: BrandAssets.surface,
      surfaceContainerHighest: BrandAssets.surfaceSoft,
      outline: BrandAssets.line,
      error: BrandAssets.accentCoral,
    );

    return ThemeData(
      colorScheme: colorScheme,
      scaffoldBackgroundColor: BrandAssets.canvas,
      useMaterial3: true,
      appBarTheme: const AppBarTheme(
        centerTitle: false,
        backgroundColor: BrandAssets.surfaceInk,
        foregroundColor: Colors.white,
        elevation: 0,
        scrolledUnderElevation: 0,
      ),
      cardTheme: CardThemeData(
        color: BrandAssets.surface,
        elevation: 0,
        shadowColor: const Color(0x0E0F172A),
        surfaceTintColor: Colors.transparent,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(BrandAssets.radius),
          side: const BorderSide(color: BrandAssets.line),
        ),
      ),
      filledButtonTheme: FilledButtonThemeData(
        style: FilledButton.styleFrom(
          backgroundColor: BrandAssets.brand,
          foregroundColor: Colors.white,
          disabledBackgroundColor: const Color(0xFFD8E1DE),
          disabledForegroundColor: BrandAssets.muted,
          minimumSize: const Size(48, 48),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(BrandAssets.radius),
          ),
          textStyle: const TextStyle(
            fontWeight: FontWeight.w800,
            letterSpacing: 0,
          ),
        ),
      ),
      outlinedButtonTheme: OutlinedButtonThemeData(
        style: OutlinedButton.styleFrom(
          foregroundColor: BrandAssets.ink,
          minimumSize: const Size(48, 46),
          side: const BorderSide(color: BrandAssets.lineStrong),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(BrandAssets.radius),
          ),
          textStyle: const TextStyle(fontWeight: FontWeight.w800),
        ),
      ),
      textButtonTheme: TextButtonThemeData(
        style: TextButton.styleFrom(
          foregroundColor: BrandAssets.primaryDark,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(BrandAssets.radius),
          ),
          textStyle: const TextStyle(fontWeight: FontWeight.w800),
        ),
      ),
      textTheme: const TextTheme(
        titleLarge: TextStyle(
          color: textColor,
          fontSize: 22,
          fontWeight: FontWeight.w700,
        ),
        titleMedium: TextStyle(
          color: textColor,
          fontSize: 18,
          fontWeight: FontWeight.w700,
        ),
        titleSmall: TextStyle(
          color: textColor,
          fontSize: 15,
          fontWeight: FontWeight.w600,
        ),
        bodyLarge: TextStyle(
          color: textColor,
          fontSize: 15,
          height: 1.5,
        ),
        bodyMedium: TextStyle(
          color: BrandAssets.muted,
          fontSize: 14,
          height: 1.5,
        ),
        bodySmall: TextStyle(
          color: BrandAssets.muted,
          fontSize: 12.5,
          height: 1.45,
        ),
        labelLarge: TextStyle(
          color: textColor,
          fontSize: 13,
          fontWeight: FontWeight.w800,
        ),
        labelMedium: TextStyle(
          color: BrandAssets.muted,
          fontSize: 11.5,
          fontWeight: FontWeight.w700,
        ),
      ),
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: BrandAssets.surface,
        hintStyle: const TextStyle(color: BrandAssets.muted),
        contentPadding:
            const EdgeInsets.symmetric(horizontal: 14, vertical: 14),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(BrandAssets.radius),
          borderSide: const BorderSide(color: BrandAssets.line),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(BrandAssets.radius),
          borderSide: const BorderSide(color: BrandAssets.line),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(BrandAssets.radius),
          borderSide: const BorderSide(color: BrandAssets.brand, width: 1.5),
        ),
      ),
      navigationBarTheme: const NavigationBarThemeData(
        backgroundColor: BrandAssets.surface,
        indicatorColor: Color(0xFFE8FBDC),
        surfaceTintColor: Colors.transparent,
        elevation: 0,
        labelBehavior: NavigationDestinationLabelBehavior.alwaysShow,
      ),
      segmentedButtonTheme: SegmentedButtonThemeData(
        style: ButtonStyle(
          padding: const WidgetStatePropertyAll<EdgeInsetsGeometry>(
            EdgeInsets.symmetric(horizontal: 14, vertical: 12),
          ),
          shape: WidgetStatePropertyAll<OutlinedBorder>(
            RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(BrandAssets.radius)),
          ),
          side: const WidgetStatePropertyAll<BorderSide>(
            BorderSide(color: BrandAssets.lineStrong),
          ),
          textStyle: const WidgetStatePropertyAll<TextStyle>(
            TextStyle(fontWeight: FontWeight.w800),
          ),
        ),
      ),
    );
  }
}