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lib/screens/home_screen.dart

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+import 'package:flutter/material.dart';
+import '../theme/app_colors.dart';
+import '../theme/app_text_styles.dart';
+import '../services/encouragement_service.dart';
+import 'focus_screen.dart';
+import 'history_screen.dart';
+import 'settings_screen.dart';
+
+/// Home Screen - Loads default duration from settings
+class HomeScreen extends StatefulWidget {
+  final EncouragementService encouragementService;
+
+  const HomeScreen({
+    super.key,
+    required this.encouragementService,
+  });
+
+  @override
+  State<HomeScreen> createState() => _HomeScreenState();
+}
+
+class _HomeScreenState extends State<HomeScreen> {
+  int _defaultDuration = 25;
+
+  @override
+  void initState() {
+    super.initState();
+    _loadDefaultDuration();
+  }
+
+  Future<void> _loadDefaultDuration() async {
+    final duration = await SettingsScreen.getDefaultDuration();
+    setState(() {
+      _defaultDuration = duration;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: AppColors.background,
+      body: SafeArea(
+        child: Padding(
+          padding: const EdgeInsets.all(24.0),
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              // App Title
+              Text(
+                'FocusBuddy',
+                style: AppTextStyles.appTitle,
+              ),
+
+              const SizedBox(height: 60),
+
+              // Duration Display
+              Container(
+                padding: const EdgeInsets.symmetric(
+                  horizontal: 32,
+                  vertical: 16,
+                ),
+                decoration: BoxDecoration(
+                  color: AppColors.white,
+                  borderRadius: BorderRadius.circular(16),
+                ),
+                child: Text(
+                  '$_defaultDuration minutes',
+                  style: const TextStyle(
+                    fontFamily: 'Nunito',
+                    fontSize: 28,
+                    fontWeight: FontWeight.w600,
+                    color: AppColors.textPrimary,
+                  ),
+                ),
+              ),
+
+              const SizedBox(height: 60),
+
+              // Start Focusing Button
+              SizedBox(
+                width: double.infinity,
+                child: ElevatedButton(
+                  onPressed: () async {
+                    final result = await Navigator.push(
+                      context,
+                      MaterialPageRoute(
+                        builder: (context) => FocusScreen(
+                          durationMinutes: _defaultDuration,
+                          encouragementService: widget.encouragementService,
+                        ),
+                      ),
+                    );
+                    // Reload duration when returning
+                    if (result == true || mounted) {
+                      _loadDefaultDuration();
+                    }
+                  },
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      const Text('Start Focusing'),
+                      const SizedBox(width: 8),
+                      Icon(
+                        Icons.play_arrow,
+                        color: AppColors.white,
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+
+              const SizedBox(height: 24),
+
+              // Helper Text
+              Text(
+                "Tap 'I got distracted'\nanytime — no guilt.",
+                style: AppTextStyles.helperText,
+                textAlign: TextAlign.center,
+              ),
+
+              const Spacer(),
+
+              // Bottom Navigation (simplified for MVP)
+              Row(
+                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                children: [
+                  TextButton.icon(
+                    onPressed: () {
+                      Navigator.push(
+                        context,
+                        MaterialPageRoute(
+                          builder: (context) => const HistoryScreen(),
+                        ),
+                      );
+                    },
+                    icon: const Icon(Icons.bar_chart),
+                    label: const Text('History'),
+                  ),
+                  TextButton.icon(
+                    onPressed: () async {
+                      await Navigator.push(
+                        context,
+                        MaterialPageRoute(
+                          builder: (context) => const SettingsScreen(),
+                        ),
+                      );
+                      // Reload duration after settings
+                      _loadDefaultDuration();
+                    },
+                    icon: const Icon(Icons.settings),
+                    label: const Text('Settings'),
+                  ),
+                ],
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}