diff --git a/app/Controllers/AIController.php b/app/Controllers/AIController.php
new file mode 100644
index 0000000..a5570b8
--- /dev/null
+++ b/app/Controllers/AIController.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Controllers;
+
+use App\Core\Controller;
+
+class AIController extends Controller {
+    
+    public function chat() {
+        header('Content-Type: application/json');
+        
+        $input = json_decode(file_get_contents('php://input'), true);
+        $userMessage = $input['message'] ?? '';
+
+        if (empty($userMessage)) {
+            echo json_encode(['error' => 'Message is empty']);
+            return;
+        }
+
+        require_once __DIR__ . '/../../ai/LocalAIApi.php';
+
+        $systemPrompt = "You are a helpful assistant for " . get_setting('site_name', 'ApkNusa') . ", an APK downloader and tech blog site. Provide concise and accurate information about Android apps, games, and technology. Be youthful and professional.";
+
+        $resp = \LocalAIApi::createResponse([
+            'input' => [
+                ['role' => 'system', 'content' => $systemPrompt],
+                ['role' => 'user', 'content' => $userMessage],
+            ],
+        ]);
+
+        if (!empty($resp['success'])) {
+            $text = \LocalAIApi::extractText($resp);
+            echo json_encode(['reply' => $text]);
+        } else {
+            echo json_encode(['error' => 'AI Assistant is currently unavailable.']);
+        }
+    }
+}
diff --git a/app/Controllers/AdminController.php b/app/Controllers/AdminController.php
index e1eb15b..de176de 100644
--- a/app/Controllers/AdminController.php
+++ b/app/Controllers/AdminController.php
@@ -54,11 +54,18 @@ class AdminController extends Controller {
             'total_downloads' => $this->getTotalDownloads(),
             'total_users' => $db->query("SELECT COUNT(*) FROM users")->fetchColumn(),
             'pending_withdrawals' => $db->query("SELECT COUNT(*) FROM withdrawals WHERE status = 'pending'")->fetchColumn(),
-            'recent_apks' => array_slice($apkService->getAllApks(), 0, 5)
+            'recent_apks' => array_slice($apkService->getAllApks(), 0, 5),
+            'referral_stats' => $this->getReferralStats()
         ];
         $this->view('admin/dashboard', $stats);
     }
 
+private function getReferralStats() {
+        $db = db_pdo();
+        $stmt = $db->query("SELECT DATE(created_at) as date, COUNT(*) as count FROM referral_downloads WHERE created_at > DATE_SUB(NOW(), INTERVAL 7 DAY) GROUP BY DATE(created_at) ORDER BY date ASC");
+        return $stmt->fetchAll();
+    }
+
     private function getTotalDownloads() {
         $db = db_pdo();
         return $db->query("SELECT SUM(total_downloads) FROM apks")->fetchColumn() ?: 0;
@@ -239,6 +246,7 @@ class AdminController extends Controller {
         $this->checkAuth();
         $settings = [
             'site_name' => get_setting('site_name'),
+            'contact_email' => get_setting('contact_email'),
             'site_icon' => get_setting('site_icon'),
             'site_favicon' => get_setting('site_favicon'),
             'meta_description' => get_setting('meta_description'),
@@ -251,6 +259,7 @@ class AdminController extends Controller {
             'github_url' => get_setting('github_url'),
             'telegram_url' => get_setting('telegram_url'),
             'whatsapp_url' => get_setting('whatsapp_url'),
+            'maintenance_mode' => get_setting('maintenance_mode'),
         ];
         $this->view('admin/settings', ['settings' => $settings]);
     }
@@ -260,7 +269,7 @@ class AdminController extends Controller {
         $db = db_pdo();
         
         $fields = [
-            'site_name', 'meta_description', 'meta_keywords', 'head_js', 'body_js',
+            'site_name', 'contact_email', 'meta_description', 'meta_keywords', 'head_js', 'body_js',
             'facebook_url', 'twitter_url', 'instagram_url', 'github_url', 'telegram_url', 'whatsapp_url'
         ];
         foreach ($fields as $field) {
diff --git a/app/Controllers/ContactController.php b/app/Controllers/ContactController.php
new file mode 100644
index 0000000..6853220
--- /dev/null
+++ b/app/Controllers/ContactController.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Controllers;
+
+use App\Core\Controller;
+use MailService;
+
+class ContactController extends Controller {
+    
+    public function index() {
+        $this->view('contact', [
+            'title' => __('contact_us') . ' - ' . get_setting('site_name', 'ApkNusa')
+        ]);
+    }
+
+    public function submit() {
+        $name = $_POST['name'] ?? '';
+        $email = $_POST['email'] ?? '';
+        $subject = $_POST['subject'] ?? 'New Contact Message';
+        $message = $_POST['message'] ?? '';
+
+        if (empty($name) || empty($email) || empty($message)) {
+            $_SESSION['error'] = 'All fields are required.';
+            $this->redirect('/contact');
+        }
+
+        if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
+            $_SESSION['error'] = 'Invalid email address.';
+            $this->redirect('/contact');
+        }
+
+        require_once __DIR__ . '/../../mail/MailService.php';
+        
+        $res = \MailService::sendContactMessage($name, $email, $message, null, $subject);
+
+        if (!empty($res['success'])) {
+            $_SESSION['success'] = 'Your message has been sent successfully!';
+        } else {
+            $_SESSION['error'] = 'Failed to send message. Please try again later.';
+            // Log error if needed: error_log($res['error']);
+        }
+
+        $this->redirect('/contact');
+    }
+}
diff --git a/app/Controllers/NewsletterController.php b/app/Controllers/NewsletterController.php
new file mode 100644
index 0000000..244062d
--- /dev/null
+++ b/app/Controllers/NewsletterController.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Controllers;
+
+use App\Core\Controller;
+
+class NewsletterController extends Controller {
+    
+    public function subscribe() {
+        header('Content-Type: application/json');
+        
+        $input = json_decode(file_get_contents('php://input'), true);
+        $email = $input['email'] ?? '';
+
+        if (empty($email) || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
+            echo json_encode(['error' => 'Please provide a valid email address.']);
+            return;
+        }
+
+        $db = db_pdo();
+        try {
+            $stmt = $db->prepare("INSERT INTO newsletter_subscribers (email) VALUES (?)");
+            $stmt->execute([$email]);
+            echo json_encode(['success' => 'Thank you for subscribing!']);
+        } catch (\PDOException $e) {
+            if ($e->getCode() == 23000) { // Duplicate entry
+                echo json_encode(['success' => 'You are already subscribed!']);
+            } else {
+                echo json_encode(['error' => 'An error occurred. Please try again.']);
+            }
+        }
+    }
+}
diff --git a/app/Controllers/SitemapController.php b/app/Controllers/SitemapController.php
index 4c8f913..1bdd17d 100644
--- a/app/Controllers/SitemapController.php
+++ b/app/Controllers/SitemapController.php
@@ -38,10 +38,21 @@ class SitemapController extends Controller {
             echo '</url>';
         }
         
+        // Blog Posts
+        $posts = $db->query("SELECT * FROM posts WHERE status = 'published'")->fetchAll();
+        foreach ($posts as $post) {
+            echo '<url>';
+            echo '<loc>' . $baseUrl . '/blog/' . htmlspecialchars($post['slug']) . '</loc>';
+            echo '<lastmod>' . date('Y-m-d', strtotime($post['created_at'] ?? 'now')) . '</lastmod>';
+            echo '<priority>0.7</priority>';
+            echo '<changefreq>monthly</changefreq>';
+            echo '</url>';
+        }
+
         // Categories (if you have category pages, assuming /category/slug)
         foreach ($categories as $category) {
             echo '<url>';
-            echo '<loc>' . $baseUrl . '/category/' . htmlspecialchars($category['slug']) . '</loc>';
+            echo '<loc>' . $baseUrl . '/?category=' . htmlspecialchars($category['slug']) . '</loc>';
             echo '<priority>0.6</priority>';
             echo '<changefreq>weekly</changefreq>';
             echo '</url>';
diff --git a/assets/js/main.js b/assets/js/main.js
index d4a6888..4a62eb3 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -91,13 +91,6 @@ document.addEventListener('DOMContentLoaded', () => {
                         dropdownBtn.innerHTML = `${categoryName} <i class="bi bi-chevron-down ms-1 small"></i>`;
                     }
 
-                    // Update title if not searching
-                    if (latestTitle && !url.includes('search=')) {
-                        // We could use translations here but for simplicity we'll just use the category name
-                        // if it's All Categories, we'll reset to original (usually "Latest APKs")
-                        // However, we'll just keep it simple for now.
-                    }
-
                     // Update URL without refreshing
                     window.history.pushState({ category: category }, '', url);
                 })
@@ -115,6 +108,90 @@ document.addEventListener('DOMContentLoaded', () => {
         });
     };
 
+    // AI Chat Assistant Logic
+    const initAIChat = () => {
+        const toggleBtn = document.getElementById('toggle-ai-chat');
+        const closeBtn = document.getElementById('close-ai-chat');
+        const chatWindow = document.getElementById('ai-chat-window');
+        const chatInput = document.getElementById('ai-chat-input');
+        const sendBtn = document.getElementById('send-ai-chat');
+        const messagesContainer = document.getElementById('ai-chat-messages');
+
+        if (!toggleBtn || !chatWindow) return;
+
+        toggleBtn.addEventListener('click', () => {
+            chatWindow.classList.toggle('d-none');
+            if (!chatWindow.classList.contains('d-none')) {
+                chatInput.focus();
+            }
+        });
+
+        closeBtn.addEventListener('click', () => {
+            chatWindow.classList.add('d-none');
+        });
+
+        const appendMessage = (message, isUser = false) => {
+            const div = document.createElement('div');
+            div.className = 'mb-3 d-flex ' + (isUser ? 'justify-content-end' : '');
+            
+            const content = document.createElement('div');
+            content.className = (isUser ? 'bg-success text-white' : 'bg-white') + ' p-3 rounded-4 shadow-sm small';
+            content.style.maxWidth = '85%';
+            if (isUser) {
+                content.style.borderBottomRightRadius = '0';
+            } else {
+                content.style.borderBottomLeftRadius = '0';
+            }
+            content.textContent = message;
+            
+            div.appendChild(content);
+            messagesContainer.appendChild(div);
+            messagesContainer.scrollTop = messagesContainer.scrollHeight;
+        };
+
+        const sendMessage = () => {
+            const message = chatInput.value.trim();
+            if (!message) return;
+
+            appendMessage(message, true);
+            chatInput.value = '';
+            
+            // Loading state
+            const loadingDiv = document.createElement('div');
+            loadingDiv.className = 'mb-3 d-flex';
+            loadingDiv.innerHTML = '<div class="bg-white p-3 rounded-4 shadow-sm small" style="border-bottom-left-radius: 0 !important;"><div class="spinner-border spinner-border-sm text-success" role="status"></div> Thinking...</div>';
+            messagesContainer.appendChild(loadingDiv);
+            messagesContainer.scrollTop = messagesContainer.scrollHeight;
+
+            fetch('/api/ai/chat', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json'
+                },
+                body: JSON.stringify({ message: message })
+            })
+            .then(response => response.json())
+            .then(data => {
+                messagesContainer.removeChild(loadingDiv);
+                if (data.reply) {
+                    appendMessage(data.reply);
+                } else {
+                    appendMessage(data.error || 'Sorry, something went wrong.');
+                }
+            })
+            .catch(err => {
+                messagesContainer.removeChild(loadingDiv);
+                appendMessage('Error connecting to AI assistant.');
+                console.error(err);
+            });
+        };
+
+        sendBtn.addEventListener('click', sendMessage);
+        chatInput.addEventListener('keypress', (e) => {
+            if (e.key === 'Enter') sendMessage();
+        });
+    };
+
     // Initial Sync
     const currentTheme = html.getAttribute('data-theme') || 'light';
     updateIcons(currentTheme);
@@ -132,6 +209,7 @@ document.addEventListener('DOMContentLoaded', () => {
     initThemeToggle('theme-toggle');
     initThemeToggle('theme-toggle-mobile');
     initCategoryAjax();
+    initAIChat();
 
     console.log('ApkNusa ready.');
-});
+});
\ No newline at end of file
diff --git a/index.php b/index.php
index 661259a..b740525 100644
--- a/index.php
+++ b/index.php
@@ -28,7 +28,19 @@ session_start();
 
 use App\Core\Router;
 
+// Maintenance Mode Check
+if (get_setting('maintenance_mode') === '1') {
+    $uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+    $isAdmin = strpos($uri, '/admin') === 0 || strpos($uri, '/login') === 0 || strpos($uri, '/logout') === 0;
+    if (!$isAdmin && !isset($_SESSION['admin_id'])) {
+        require_once 'views/maintenance.php';
+        exit;
+    }
+}
+
 $router = new Router();
+$router->post('/api/newsletter/subscribe', 'NewsletterController@subscribe');
+$router->post('/api/ai/chat', 'AIController@chat');
 
 // Sitemap
 $router->get('/sitemap.xml', 'SitemapController@index');
@@ -51,6 +63,8 @@ $router->get('/blog', 'BlogController@index');
 $router->get('/blog/:slug', 'BlogController@detail');
 
 // Static Pages
+$router->get('/contact', 'ContactController@index');
+$router->post('/contact', 'ContactController@submit');
 $router->get('/help-center', 'HomeController@helpCenter');
 $router->get('/privacy-policy', 'HomeController@privacyPolicy');
 $router->get('/terms-of-service', 'HomeController@termsOfService');
diff --git a/views/admin/apks/index.php b/views/admin/apks/index.php
index a5d9fdb..59bc542 100644
--- a/views/admin/apks/index.php
+++ b/views/admin/apks/index.php
@@ -1,8 +1,12 @@
 <?php include __DIR__ . '/../header.php'; ?>
 
 <div class="container-fluid py-4">
-    <div class="d-flex justify-content-between align-items-center mb-4">
+    <div class="d-flex align-items-center mb-4">
         <h1 class="h3 mb-0 text-gray-800">Manage APKs</h1>
+        <form action="/admin/apks" method="GET" class="d-flex gap-2 ms-auto me-3">
+            <input type="text" name="search" class="form-control form-control-sm" placeholder="Search APKs..." value="<?php echo htmlspecialchars($_GET['search'] ?? ''); ?>">
+            <button type="submit" class="btn btn-sm btn-outline-secondary"><i class="bi bi-search"></i></button>
+        </form>
         <a href="/admin/apks/add" class="btn btn-primary shadow-sm">
             <i class="bi bi-plus-lg me-1"></i> Add New APK
         </a>
diff --git a/views/admin/dashboard.php b/views/admin/dashboard.php
index df6d2a1..693cb8d 100644
--- a/views/admin/dashboard.php
+++ b/views/admin/dashboard.php
@@ -79,6 +79,68 @@
         </div>
     </div>
 
+<div class="row mb-4">
+        <div class="col-12">
+            <div class="card shadow-sm border-0 rounded-4 bg-white">
+                <div class="card-header bg-white py-3 border-bottom border-light d-flex justify-content-between align-items-center">
+                    <h6 class="m-0 font-weight-bold text-primary fw-bold">Referral Downloads (Last 7 Days)</h6>
+                </div>
+                <div class="card-body">
+                    <canvas id="referralChart" style="height: 300px; width: 100%;"></canvas>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <script>
+        document.addEventListener('DOMContentLoaded', function() {
+            const ctx = document.getElementById('referralChart').getContext('2d');
+            const stats = <?php echo json_encode($referral_stats); ?>;
+            
+            const labels = stats.map(s => s.date);
+            const counts = stats.map(s => s.count);
+
+            new Chart(ctx, {
+                type: 'line',
+                data: {
+                    labels: labels.length ? labels : ['No Data'],
+                    datasets: [{
+                        label: 'Referral Downloads',
+                        data: counts.length ? counts : [0],
+                        borderColor: '#10B981',
+                        backgroundColor: 'rgba(16, 185, 129, 0.1)',
+                        fill: true,
+                        tension: 0.4,
+                        pointRadius: 5,
+                        pointBackgroundColor: '#10B981'
+                    }]
+                },
+                options: {
+                    responsive: true,
+                    maintainAspectRatio: false,
+                    plugins: {
+                        legend: {
+                            display: false
+                        }
+                    },
+                    scales: {
+                        y: {
+                            beginAtZero: true,
+                            grid: {
+                                color: 'rgba(0, 0, 0, 0.05)'
+                            }
+                        },
+                        x: {
+                            grid: {
+                                display: false
+                            }
+                        }
+                    }
+                }
+            });
+        });
+    </script>
     <div class="row g-4">
         <div class="col-lg-8">
             <div class="card shadow-sm border-0 rounded-4 mb-4 bg-white">
diff --git a/views/admin/settings.php b/views/admin/settings.php
index 56f654f..7e6529d 100644
--- a/views/admin/settings.php
+++ b/views/admin/settings.php
@@ -10,6 +10,10 @@
                 <div class="card-body p-4">
                     <form action="/admin/settings" method="POST" enctype="multipart/form-data">
                         <div class="mb-4">
+                        <div class="mb-4">
+                            <label class="form-label fw-semibold">Contact Email</label>
+                            <input type="email" name="contact_email" class="form-control" value="<?php echo htmlspecialchars($settings['contact_email'] ?? ''); ?>" placeholder="support@yourdomain.com">
+                        </div>
                             <label class="form-label fw-semibold"><?php echo __('site_name'); ?></label>
                             <input type="text" name="site_name" class="form-control form-control-lg" value="<?php echo htmlspecialchars($settings['site_name']); ?>" required>
                         </div>
@@ -35,6 +39,16 @@
                             </div>
                         </div>
 
+                        <div class="mb-4 p-3 bg-light rounded border">
+                            <div class="form-check form-switch">
+                                <input class="form-check-input" type="checkbox" name="maintenance_mode" value="1" id="maintenanceMode" <?php echo ($settings['maintenance_mode'] ?? '0') === '1' ? 'checked' : ''; ?>>
+                                <label class="form-check-label fw-bold" for="maintenanceMode">
+                                    <i class="fas fa-tools me-2 text-warning"></i>Maintenance Mode
+                                </label>
+                            </div>
+                            <div class="form-text mt-1">When enabled, regular visitors will see a maintenance page. Admins can still access the site.</div>
+                        </div>
+
                         <hr class="my-4">
                         <h5 class="fw-bold mb-3"><i class="fas fa-share-alt me-2"></i>Social Media Settings</h5>
 
@@ -129,4 +143,4 @@
     </div>
 </div>
 
-<?php include 'footer.php'; ?>
\ No newline at end of file
+<?php include 'footer.php'; ?>
diff --git a/views/contact.php b/views/contact.php
new file mode 100644
index 0000000..51229a5
--- /dev/null
+++ b/views/contact.php
@@ -0,0 +1,78 @@
+<?php include 'header.php'; ?>
+
+<div class="container py-5">
+    <div class="row justify-content-center">
+        <div class="col-md-8">
+            <div class="card shadow border-0 rounded-4 overflow-hidden">
+                <div class="row g-0">
+                    <div class="col-lg-5 bg-success p-5 text-white d-flex flex-column justify-content-center">
+                        <h2 class="fw-bold mb-4">Get in Touch</h2>
+                        <p class="mb-4 opacity-75">Have questions or feedback about our APKs? We'd love to hear from you. Send us a message and we'll respond as soon as possible.</p>
+                        
+                        <div class="d-flex align-items-center mb-3">
+                            <i class="bi bi-geo-alt-fill me-3 fs-4"></i>
+                            <span>Jakarta, Indonesia</span>
+                        </div>
+                        <div class="d-flex align-items-center mb-3">
+                            <i class="bi bi-envelope-fill me-3 fs-4"></i>
+                            <span><?php echo get_setting('contact_email', 'support@apknusa.com'); ?></span>
+                        </div>
+                        
+                        <div class="mt-4 pt-4 border-top border-white border-opacity-25">
+                            <h6 class="fw-bold mb-3">Follow Us</h6>
+                            <div class="d-flex gap-3">
+                                <?php if($fb = get_setting('facebook_url')): ?><a href="<?php echo $fb; ?>" class="text-white fs-5"><i class="bi bi-facebook"></i></a><?php endif; ?>
+                                <?php if($tw = get_setting('twitter_url')): ?><a href="<?php echo $tw; ?>" class="text-white fs-5"><i class="bi bi-twitter-x"></i></a><?php endif; ?>
+                                <?php if($ig = get_setting('instagram_url')): ?><a href="<?php echo $ig; ?>" class="text-white fs-5"><i class="bi bi-instagram"></i></a><?php endif; ?>
+                                <?php if($tg = get_setting('telegram_url')): ?><a href="<?php echo $tg; ?>" class="text-white fs-5"><i class="bi bi-telegram"></i></a><?php endif; ?>
+                            </div>
+                        </div>
+                    </div>
+                    <div class="col-lg-7 p-5 bg-white">
+                        <?php if (isset($_SESSION['success'])): ?>
+                            <div class="alert alert-success alert-dismissible fade show rounded-3 mb-4" role="alert">
+                                <i class="bi bi-check-circle-fill me-2"></i>
+                                <?php echo $_SESSION['success']; unset($_SESSION['success']); ?>
+                                <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+                            </div>
+                        <?php endif; ?>
+
+                        <?php if (isset($_SESSION['error'])): ?>
+                            <div class="alert alert-danger alert-dismissible fade show rounded-3 mb-4" role="alert">
+                                <i class="bi bi-exclamation-triangle-fill me-2"></i>
+                                <?php echo $_SESSION['error']; unset($_SESSION['error']); ?>
+                                <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+                            </div>
+                        <?php endif; ?>
+
+                        <form action="/contact" method="POST">
+                            <div class="mb-3">
+                                <label class="form-label fw-bold small text-uppercase">Full Name</label>
+                                <input type="text" name="name" class="form-control form-control-lg bg-light border-0 px-4" placeholder="Your Name" required>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label fw-bold small text-uppercase">Email Address</label>
+                                <input type="email" name="email" class="form-control form-control-lg bg-light border-0 px-4" placeholder="name@example.com" required>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label fw-bold small text-uppercase">Subject</label>
+                                <input type="text" name="subject" class="form-control form-control-lg bg-light border-0 px-4" placeholder="How can we help?">
+                            </div>
+                            <div class="mb-4">
+                                <label class="form-label fw-bold small text-uppercase">Message</label>
+                                <textarea name="message" class="form-control bg-light border-0 px-4 py-3" rows="4" placeholder="Your message here..." required></textarea>
+                            </div>
+                            <div class="d-grid">
+                                <button type="submit" class="btn btn-success btn-lg rounded-pill py-3 fw-bold">
+                                    Send Message <i class="bi bi-send-fill ms-2"></i>
+                                </button>
+                            </div>
+                        </form>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<?php include 'footer.php'; ?>
diff --git a/views/footer.php b/views/footer.php
index cd160fe..6ca74d0 100644
--- a/views/footer.php
+++ b/views/footer.php
@@ -30,15 +30,17 @@
                         <li><a href="/help-center" class="text-muted text-decoration-none py-1 d-block small"><?php echo __('support_center'); ?></a></li>
                         <li><a href="/terms-of-service" class="text-muted text-decoration-none py-1 d-block small"><?php echo __('terms_of_service'); ?></a></li>
                         <li><a href="/privacy-policy" class="text-muted text-decoration-none py-1 d-block small"><?php echo __('privacy_policy'); ?></a></li>
+                        <li><a href="/contact" class="text-muted text-decoration-none py-1 d-block small">Contact Us</a></li>
                     </ul>
                 </div>
                 <div class="col-lg-4">
                     <h6 class="fw-bold mb-3"><?php echo __('subscribe'); ?></h6>
                     <p class="text-muted small"><?php echo __('subscribe_text'); ?></p>
                     <div class="input-group">
-                        <input type="email" class="form-control border-light-subtle" placeholder="<?php echo __('email_placeholder'); ?>">
-                        <button class="btn btn-success px-3" type="button"><?php echo __('subscribe'); ?></button>
+                        <input type="email" id="newsletter-email" class="form-control border-light-subtle" placeholder="<?php echo __('email_placeholder'); ?>">
+                        <button class="btn btn-success px-3" id="newsletter-btn" type="button"><?php echo __('subscribe'); ?></button>
                     </div>
+                    <div id="newsletter-msg" class="mt-2 small"></div>
                 </div>
             </div>
             <hr class="my-5 text-black-50 opacity-25">
@@ -71,8 +73,85 @@
             </div>
         </div>
     </footer>
+
+    <!-- AI Chat Assistant -->
+    <div id="ai-chat-wrapper" class="fixed-bottom p-3 d-flex flex-column align-items-end" style="z-index: 1050; pointer-events: none;">
+        <div id="ai-chat-window" class="card shadow-lg border-0 mb-3 d-none" style="width: 350px; max-width: 90vw; height: 450px; pointer-events: auto; border-radius: 20px;">
+            <div class="card-header bg-success text-white py-3 d-flex justify-content-between align-items-center" style="border-radius: 20px 20px 0 0;">
+                <div class="d-flex align-items-center">
+                    <div class="bg-white rounded-circle p-1 me-2">
+                        <i class="bi bi-robot text-success"></i>
+                    </div>
+                    <span class="fw-bold">ApkNusa AI</span>
+                </div>
+                <button type="button" class="btn-close btn-close-white" id="close-ai-chat"></button>
+            </div>
+            <div class="card-body overflow-auto p-3" id="ai-chat-messages" style="background: var(--subtle-bg);">
+                <div class="mb-3">
+                    <div class="bg-white p-3 rounded-4 shadow-sm small" style="max-width: 85%; border-bottom-left-radius: 0 !important;">
+                        Hello! How can I help you today?
+                    </div>
+                </div>
+            </div>
+            <div class="card-footer bg-white border-0 p-3" style="border-radius: 0 0 20px 20px;">
+                <div class="input-group">
+                    <input type="text" id="ai-chat-input" class="form-control border-light-subtle rounded-pill-start px-3" placeholder="Type a message...">
+                    <button class="btn btn-success rounded-pill-end px-3" id="send-ai-chat">
+                        <i class="bi bi-send-fill"></i>
+                    </button>
+                </div>
+            </div>
+        </div>
+        <button class="btn btn-success shadow-lg d-flex align-items-center justify-content-center p-0 rounded-circle" id="toggle-ai-chat" style="width: 60px; height: 60px; pointer-events: auto;">
+            <i class="bi bi-chat-dots-fill fs-3"></i>
+        </button>
+    </div>
+
+    <style>
+        #ai-chat-messages::-webkit-scrollbar {
+            width: 4px;
+        }
+        #ai-chat-messages::-webkit-scrollbar-thumb {
+            background: #10B981;
+            border-radius: 10px;
+        }
+    </style>
+
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
     <script src="/assets/js/main.js?v=<?php echo time(); ?>"></script>
+    <script>
+        document.getElementById('newsletter-btn').addEventListener('click', function() {
+            const email = document.getElementById('newsletter-email').value;
+            const msg = document.getElementById('newsletter-msg');
+            
+            if (!email) return;
+            
+            this.disabled = true;
+            this.innerHTML = '<span class="spinner-border spinner-border-sm"></span>';
+            
+            fetch('/api/newsletter/subscribe', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ email: email })
+            })
+            .then(res => res.json())
+            .then(data => {
+                this.disabled = false;
+                this.innerHTML = '<?php echo __("subscribe"); ?>';
+                if (data.success) {
+                    msg.innerHTML = '<span class="text-success">' + data.success + '</span>';
+                    document.getElementById('newsletter-email').value = '';
+                } else {
+                    msg.innerHTML = '<span class="text-danger">' + data.error + '</span>';
+                }
+            })
+            .catch(err => {
+                this.disabled = false;
+                this.innerHTML = '<?php echo __("subscribe"); ?>';
+                msg.innerHTML = '<span class="text-danger">An error occurred.</span>';
+            });
+        });
+    </script>
     <?php echo get_setting('body_js'); ?>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/views/maintenance.php b/views/maintenance.php
new file mode 100644
index 0000000..1b3fb08
--- /dev/null
+++ b/views/maintenance.php
@@ -0,0 +1,50 @@
+<?php
+$currentTheme = \App\Services\ThemeService::getCurrent();
+?>
+<!DOCTYPE html>
+<html lang="en" data-theme="<?php echo $currentTheme; ?>">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Under Maintenance - <?php echo htmlspecialchars(get_setting('site_name', 'ApkNusa')); ?></title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.1/font/bootstrap-icons.css">
+    <link rel="stylesheet" href="/assets/css/custom.css?v=<?php echo time(); ?>">
+    <style>
+        body {
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            height: 100vh;
+            text-align: center;
+            background: var(--bg-color);
+            color: var(--text-color);
+        }
+        .maintenance-container {
+            max-width: 500px;
+            padding: 2rem;
+            background: var(--card-bg);
+            border-radius: 24px;
+            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
+            border: 1px solid var(--border-color);
+        }
+        .icon-wrapper {
+            font-size: 5rem;
+            color: #10B981;
+            margin-bottom: 1.5rem;
+        }
+    </style>
+</head>
+<body>
+    <div class="maintenance-container">
+        <div class="icon-wrapper">
+            <i class="bi bi-tools"></i>
+        </div>
+        <h1 class="fw-bold mb-3">Under Maintenance</h1>
+        <p class="text-muted mb-4">We're currently performing some scheduled maintenance. We'll be back shortly. Thank you for your patience!</p>
+        <div class="d-flex justify-content-center gap-3">
+            <a href="mailto:<?php echo get_setting('contact_email'); ?>" class="btn btn-outline-success rounded-pill px-4">Contact Support</a>
+        </div>
+    </div>
+</body>
+</html>