CSS Consolidation: Merged all inline styles and separate CSS files into single style.css

- Consolidated benefits-cards.css into main style.css
- Removed all inline <style> blocks from 19 HTML files
- Added CSS versioning (?v=202412291400) for better caching
- Extracted navbar scroll effects, hero layout stabilization, and mobile responsive styles
- Fixed benefits cards visibility and animations
- Improved website performance by reducing HTTP requests
- Enhanced maintainability with single CSS file architecture

contact.html

@@ -3,13 +3,10 @@
 <head>
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width,initial-scale=1.0" />
-  <title>Contact Us - Gyannetra</title>
-  <link rel="stylesheet" href="css/style.css" />
+  <title>Contact Us - Gyannetra</title>  <link rel="stylesheet" href="css/style.css?v=202412291400" />
   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css">
   <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap" rel="stylesheet">
-  
-  <!-- Navbar scroll effect styles -->
-  <style>
+</head>
     .site-header {
       position: fixed;
       top: 0;