feat: Complete frontend redesign with modern UI/UX

- Created modern design system with CSS variables and gradients
- Implemented new base template with dark/light theme support
- Added modern navigation with smooth animations and transitions
- Redesigned home page with hero section, service previews, and interactive elements
- Created modern services page with filtering and modal functionality
- Redesigned about page with team section, stats, and technology stack
- Added comprehensive JavaScript for interactivity and animations
- Implemented responsive design for mobile devices
- Added Font Awesome icons and Google Fonts (Inter)
- Created modular CSS architecture with utility classes
- Added loading screens, scroll-to-top, and theme toggle functionality
- Improved accessibility with proper ARIA labels and semantic markup

Features:
- Dark/Light theme toggle
- Smooth scroll animations
- Interactive service cards
- Modern button styles with ripple effects
- Responsive grid layouts
- Progress bars and statistics
- Mobile-first responsive design
- Clean typography and modern spacing
- Card-based UI with shadows and hover effects

smartsoltech/staticfiles/assets/css/service_request_modal.css

@@ -0,0 +1,27 @@
+    /* Добавляем стили для анимации появления модального окна */
+    #serviceModal {
+        display: none;
+        position: fixed;
+        z-index: 1;
+        left: 0;
+        top: 0;
+        width: 100%;
+        height: 100%;
+        background-color: rgba(0, 0, 0, 0.4);
+    }
+
+    .modal-content {
+        position: relative;
+        background-color: #fefefe;
+        margin: auto;
+        padding: 20px;
+        border: 1px solid #888;
+        width: 80%;
+        max-width: 600px;
+        transform: scale(0);
+        transition: transform 0.5s ease;
+    }
+
+    .modal.show .modal-content {
+        transform: scale(1);
+    }