Enhance CSS Styles for Improved User Experience and Visual Appeal

[Jitmisra]

The current CSS styles for the website need refinement to enhance user experience and visual aesthetics. Key areas of focus include:

1.	Navigation Bar: Optimize the navigation bar for better responsiveness across different screen sizes while ensuring consistent styling and hover effects.
2.	Background Gradient Animation: Improve the gradient animation for the background to create a more engaging visual effect, making sure it aligns with the overall theme of the site.
3.	Contributor Grid: Redesign the contributor grid layout to ensure better alignment and spacing of contributor profiles, enhancing their presentation and hover effects.
4.	Dark Mode Integration: Fine-tune the dark mode styles to ensure readability and maintain a cohesive look with the light mode. This includes adjustments to background colors, text colors, and button styles.
5.	Form Styles: Refine the styles for input fields and buttons to improve usability and aesthetics, ensuring a more modern look and feel.
6.	Responsiveness: Implement additional media queries to ensure a seamless experience on all devices, particularly focusing on tablet and mobile views.

[cocomantis]

Thank you for the contribution, please resolve the conflicts so I can merge the pull request into the main branch!