[Bug] Ineffective styling of navbar in buy used cars page in dark mode

[Rajitha-20050412]

Describe the bug

The navbar styling of the buy used cars page is not looking great in dark mode and may effect the user experience.

To Reproduce

Go to rent your car
Click on buy your car
Then it goes to the buy your car page
observe the navbar in the dark mode

Expected behavior

The navbar should look good when the dark mode is activated in the buy used cars page.

Additional context

No response

[github-actions]

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• Reviewed the README.md for project setup and guidelines.
• Gone through the CONTRIBUTING.md to follow contribution standards.
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Thanks again for your contribution! ✨

[Akashshelke07]

👋 Hi there!

Thank you for contributing! This issue involves fixing the navbar styling on the “Buy Used Cars” page in dark mode to improve user experience.

✅ Please review README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before starting.
⚠️ Wait until this issue is assigned to you before submitting a Pull Request.

Once assigned, create a branch, fix the CSS for dark mode consistency, and reference this issue in your PR (e.g., Fixes #<issue_number>).

🚀 Thank you for helping improve the project!