create project

frontend/lib/theme/app_theme.dart

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+import 'package:flutter/material.dart';
+import 'colors.dart';
+
+class AppTheme {
+  static ThemeData get light => ThemeData(
+    useMaterial3: true,
+    scaffoldBackgroundColor: AppColors.pageBg,
+    colorScheme: ColorScheme.light(
+      primary: AppColors.brand,
+      secondary: AppColors.brandLight,
+    ),
+    appBarTheme: const AppBarTheme(
+      backgroundColor: Colors.transparent,
+      elevation: 0,
+      centerTitle: true,
+    ),
+    bottomNavigationBarTheme: const BottomNavigationBarThemeData(
+      backgroundColor: Colors.transparent,
+      elevation: 0,
+    ),
+  );
+}

frontend/lib/theme/colors.dart

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+import 'package:flutter/material.dart';
+
+class AppColors {
+  static const brand = Color(0xFFFF6B35);
+  static const brandLight = Color(0xFFFF9F5B);
+  static const brandBg = Color(0xFFFFF0E8);
+  static const income = Color(0xFF34C759);
+  static const expense = Color(0xFFFF3B30);
+  static const textPrimary = Color(0xFF1C1C1E);
+  static const textSecondary = Color(0xFF8E8E93);
+  static const cardBg = Color(0xA6FFFFFF);
+  static const pageBg = Color(0xFFF2F2F7);
+}