Update Styling and Content for Improved Usability

[ainycodes]

This pull request includes comprehensive updates to the CSS and HTML files of the project:

CSS Changes:

• Updated background colors, font families, and overall color scheme for a modern look.
• Revamped button styles, including colors and borders, for better visibility and usability.
• Enhanced radio button and checkbox styling to improve user experience.
• Made various other CSS adjustments for consistency and aesthetic appeal.

HTML Changes:

• Simplified the content of index.html for easier readability and navigation.
• Improved overall structure to enhance user interaction.

These changes aim to provide a more visually appealing and user-friendly interface while maintaining the core functionality of the original project. I believe these updates will enhance the overall experience for users.