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/hero.css

@@ -0,0 +1,38 @@
+.hero {
+    background-image: url('../assets/images/hero-background.jpg');
+    background-size: cover;
+    background-position: center;
+    height: 100vh;
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    color: white;
+    text-align: center;
+    padding: 20px;
+}
+
+.hero h1 {
+    font-size: 3rem;
+    margin: 0;
+}
+
+.hero p {
+    font-size: 1.5rem;
+    margin: 10px 0 20px;
+}
+
+.hero .cta-button {
+    background-color: #ffcc00;
+    color: #333;
+    padding: 15px 30px;
+    border: none;
+    border-radius: 5px;
+    font-size: 1.2rem;
+    cursor: pointer;
+    transition: background-color 0.3s ease;
+}
+
+.hero .cta-button:hover {
+    background-color: #e6b800;
+}