Initial commit: Luftglanz drone website with integrated AI chat assistant

Features:
- Complete Luftglanz drone cleaning website
- AI chat assistant integrated with OpenAI API
- Expert product advice for AGO Quart and Mellerud cleaning products
- Formal German language support (Sie form)
- Secure PHP backend for API calls
- Responsive design with mobile support
- Product-specific knowledge base
- Safety statements from manufacturers
- Multi-page integration (index, products, services, contact)

Technical components:
- AI chat widget (js/ai-chat.js)
- Chat styling (css/components/ai-chat.css)
- Backend API (ai-chat-api.php)
- Product knowledge base with detailed specifications
- Demo and documentation files

css/components/mobile-menu.css

@@ -0,0 +1,70 @@
+/* Mobile navigation styles */
+
+/* Mobile toggle button */
+.mobile-toggle {
+    display: none;
+    font-size: 1.75rem;
+    color: var(--primary-color);
+    background: none;
+    border: none;
+    cursor: pointer;
+    padding: 0.5rem;
+    z-index: 1000;
+}
+
+/* Mobile responsiveness */
+@media (max-width: 768px) {
+    .mobile-toggle {
+        display: block; /* Show on mobile */
+    }
+    
+    .main-nav {
+        display: none;
+        position: absolute;
+        top: 100%;
+        left: 0;
+        right: 0;
+        background-color: var(--bg-light);
+        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
+        z-index: 999;
+        border-radius: 0 0 10px 10px;
+        border-top: 1px solid rgba(0, 0, 0, 0.1);
+    }
+    
+    .main-nav.active {
+        display: block;
+    }
+    
+    .main-nav ul {
+        flex-direction: column;
+        width: 100%;
+        padding: 1rem 0;
+        gap: 0;
+    }
+    
+    .main-nav li {
+        margin: 0;
+        width: 100%;
+        text-align: center;
+    }
+    
+    .main-nav a {
+        display: block;
+        padding: 0.75rem;
+        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
+        width: 100%;
+    }
+    
+    .main-nav a:hover::after, 
+    .main-nav a.active::after {
+        display: none;
+    }
+
+    /* Ensure footer copyright is visible and properly formatted on mobile */
+    footer .container p {
+        text-align: center;
+        font-size: 0.9rem;
+        margin: 0;
+        padding: 1rem 0;
+    }
+}