working on themes

lib/main.dart

@@ -33,7 +33,25 @@ class WkApp extends StatelessWidget {
     return MaterialApp(
       title: 'Hirameki SRS',
       debugShowCheckedModeBanner: false,
-      theme: ThemeData.dark(useMaterial3: true),
+      theme: ThemeData(
+        colorScheme: const ColorScheme(
+          brightness: Brightness.dark,
+          primary: Color(0xFF90CAF9), // Light blue for primary elements
+          onPrimary: Colors.black,
+          secondary: Color(0xFFBBDEFB), // Slightly lighter blue for secondary elements
+          onSecondary: Colors.black,
+          tertiary: Color(0xFFA5D6A7), // Light green for success/correct states
+          onTertiary: Colors.black,
+          error: Color(0xFFEF9A9A), // Light red for error states
+          onError: Colors.black,
+          surface: Color(0xFF121212), // Very dark gray
+          onSurface: Colors.white,
+          surfaceContainer: Color(0xFF1E1E1E), // Slightly lighter dark gray
+          surfaceContainerHighest: Color(0xFF424242), // A distinct dark gray for surface variants
+          onSurfaceVariant: Colors.white70,
+        ),
+        useMaterial3: true,
+      ),
       home: const StartScreen(),
     );
   }