Update light Mode: White Page & Toggle Symbol

[SanikaThorat60]

Summary

This PR improves the light mode functionality for the Hacktoberfest 2025 guide page:

• After enabling light mode, the page background changes to white for better readability.
• Cards remain white in light mode to maintain visibility and clarity.
• The light mode toggle button symbol dynamically changes: ☀️ (light mode)↔🌙 (dark mode) , reflecting the current mode.

These changes enhance user experience and maintain a consistent and clean design.

Type of change

• New feature / UI improvement
• Bug fix
• Documentation update

Checklist

• My code follows the repository style
• I have added necessary documentation
• I have added tests
• I have read the contributing guidelines

How to test

1. Open the Hacktoberfest 2025 guide page in a browser.
2. Click the dark mode toggle button.
3. Verify that:
   • Page background turns white (dark mode enabled).
   • Footer turns black with white text.
   • Cards remain white with readable dark text.
   • Toggle symbol changes from 🌙 → ☀️
     (🌙 = dark mode active, ☀️ = light mode active)
4. Observe that cards animate smoothly on page load and on hover.
5. Click the toggle again to switch back to the previous mode.

Screenshots (if applicable)

before

after

Additional notes

The changes ensure a visually appealing and user-friendly light mode experience while keeping content readable and interactive.

[Ashutosh10192]

hello i want to contribute