feat(core): ✨ adds the css

[priyanshu2k3]

adds the css

ref : #381

Description

Clearly describe the changes you've made in this pull request. Explain the purpose and reasoning behind the changes. Reference any relevant issues or discussions using keywords like "Fixes #<issue_number>" or "Resolves #<issue_number>".

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Checklist

• I have performed a thorough self-review of my code.
• I have added or updated relevant tests for my changes.
• My code follows the project's style guidelines and best practices.
• I have updated the documentation if necessary.
• I have added or updated relevant comments in my code.
• I have resolved any merge conflicts of my branch.

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Maintainer Notes

• Has this change been tested in a staging environment?
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