fixing dark mode appearance and header of community page

[Riyachauhan11]

Related Issue

None

Fixes: #4478

Description

I have improved the bg img in dark mode and the cards now have change in their styling in dark mode.
The header is responsive with the toggle in corrected pos, centrally aligned and doesnt stay on screen while scrolling.

Type of PR

• Bug fix
• Feature enhancement
• Documentation update
• Other (specify): _______________

Screenshots / videos (if applicable)

[Attach any relevant screenshots or videos demonstrating the changes. Make sure to attach before & after screenshots in your PR.]
Before:

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Checklist:

• I have made this change from my own.
• I have taken help from some online resources.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers and screenshots after making the changes.

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[abhi03ruchi]

Screen.Recording.2024-11-03.at.12.52.06.AM.mov

fix these 2 . the grey area .

[Riyachauhan11]

Screen.Recording.2024-11-03.at.12.52.06.AM.mov

fix these 2 . the grey area .

should be fine now, was working on it