Search-button enhanced bugs fixed

[pooranjoyb]

Description

With this enhancement, Search bar is centered and styled so that it resembles with dark-mode. It was, eventually giving a better user experience in the page.

Checklist

• [x] I am making a proper pull request, not spam.
• [x] I've checked the issue list before deciding what to submit.
• [x] I've made the enhancement both for light as well as dark modes
• [x] I ensured that the page remains responsive after the addition of the custom CSS

Related Issues or Pull Requests

97

Add relevant screenshot or video (if any)

Would be glad if you add hacktoberfest-accepted label if this PR is merged. @EshanTrivedi21

[EshanTrivedi21]

Great work with this @pooranjoyb 🚀🚀