Major website redesign: Complete CSS architecture overhaul

- Reorganized CSS into modular architecture (core.css, pages.css, responsive.css, components.css)
- Implemented comprehensive design system with CSS custom properties for theming
- Added responsive navigation with hamburger menu and dropdown systems
- Created modern card-based component system for courses, expertise, and services
- Enhanced all HTML pages with updated styling and improved user experience
- Added extensive animation system with smooth transitions and hover effects
- Implemented mobile-first responsive design with comprehensive breakpoints
- Established industry-specific color theming system
- Moved old CSS files to backup folder for reference
- Updated all service, education, and industry pages with consistent styling

css/backup/webinar-video.css

@@ -0,0 +1,69 @@
+/* webinar-video.css - Styling for webinar video cards */
+
+/* Webinar Video Grid - 2x2 layout */
+.webinar-videos-grid {
+    display: grid;
+    grid-template-columns: repeat(2, 1fr);
+    gap: 30px;
+    margin-top: 2.5rem;
+    padding: 0 2rem;
+}
+
+/* Video Card Styling */
+.webinar-video-card {
+    background: rgba(20, 30, 50, 0.6);
+    border: 1px solid rgba(109, 40, 217, 0.2);
+    border-radius: 12px;
+    overflow: hidden;
+    transition: all 0.3s ease;
+    display: flex;
+    flex-direction: column;
+    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
+    min-height: 280px; /* Ensure consistent height for the 2x2 layout */
+}
+
+.webinar-video-card:hover {
+    transform: translateY(-8px);
+    box-shadow: 0 15px 30px rgba(109, 40, 217, 0.4);
+    border-color: rgba(109, 40, 217, 0.6);
+}
+
+/* Video Container - Make it cover more of the card */
+.webinar-video-card .video-container {
+    position: relative;
+    width: 100%;
+    padding-bottom: 65%; /* Slightly larger aspect ratio for more prominence */
+    height: 0;
+    overflow: hidden;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+}
+
+.webinar-video-card .video-container iframe {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    border: none;
+}
+
+/* Video Info Section */
+.webinar-video-card .video-info {
+    padding: 12px;
+    text-align: center;
+}
+
+.webinar-video-card .video-info h3 {
+    margin: 0;
+    font-size: 1.8rem;
+    font-weight: 400;
+    color: #52eef5;
+}
+
+/* Responsive Layout */
+@media (max-width: 900px) {
+    .webinar-videos-grid {
+        grid-template-columns: 1fr;
+        gap: 20px;
+    }
+}