[FEATURE] - Improve dark mode CSS and layout in Feedback section

[vanshika-varshney]

Description
The Feedback section currently uses outdated/ inconsistent color styles in dark mode that don’t align with the latest design system. This affects both UI consistency and user experience.

Describe the solution you'd like
We need to update the color palette and CSS rules to improve readability, accessibility, and visual coherence across the section

Screenshots

Additional context
Please assign this issue to me.

[github-actions]

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