contact us form corrected and navbar ui upgraded

[prkr-28]

🚀 Pull Request Checklist

Please ensure the following before requesting a review:

• 🔁 I have pulled the latest changes from the main branch.
• 🧪 My code is tested and does not break existing functionality.
• 📚 I have added/updated documentation wherever necessary.
• 🧹 My code follows the project’s coding standards.
• ✍️ My commits are clear and meaningful.
• 🧾 I have linked the issue this PR addresses with Closes #<issue_number>.

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🧠 Description

I have corrected the contact us component in which placeholder was invisible when switched from dark to light mode and vice-versa. Also navbar and floating navbar ui upgraded slightly.

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✅ Type of Change

• 🐞 Bug fix
• 💡 Feature
• 🧹 Code cleanup/refactor

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📝 Additional Notes (Optional)

[vercel]

@prkr-28 is attempting to deploy a commit to the Annanya's projects Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

🙌 Thanks @prkr-28 for raising this PR!
Our team will review it soon ⏳ — meanwhile, please make sure your PR follows our contributing guidelines 👉 Contributing Guidelines 🎉

[github-actions]

🎉🎉 Thank you for your contribution! Your PR #201 has been merged! 🎉🎉