Refactor CSS styles and update HTML structure for improved layout and responsiveness

- Updated padding values for sections in custom CSS files to enhance spacing.
- Introduced new card styles with hover effects for better user interaction.
- Added new gradient card layout in the chill theme for a visually appealing design.
- Removed obsolete sector layout and replaced it with a more flexible gradient card layout.
- Enhanced feature list layout with improved pagination and sidebar integration.
- Created a new shortcode for gradient card sections to streamline feature presentation.

themes/chill-theme/layouts/shortcodes/gradient-card-section.html

@@ -4,13 +4,13 @@
 
 <section class="section">
     <div class="container">
-        <div class="text-center max-w-3xl mx-auto mb-16">
+        <div class="text-center max-w-3xl mx-auto mb-8">
             <h2 class="text-3xl md:text-4xl font-bold mb-6">{{ $title }}</h2>
             <p class="text-xl text-gray-600">{{ $description | markdownify }}</p>
         </div>
 
         <!-- Feature Grid -->
-        <div class="text-center max-w-3xl mx-auto mb-16">
+        <div class="text-center max-w-3xl mx-auto mb-8">
             {{ .Inner | safeHTML  }}
         </div>
     </div>