fix: input color issue on rating questio

[Dhruwang]

What does this PR do?

Fixes #2627

How should this be tested?

Increased close button size

Before

After

Checklist

Required

• Filled out the "How to test" section in this PR
• Read How we Code at Formbricks
• Self-reviewed my own code
• Commented on my code in hard-to-understand bits
• Ran pnpm build
• Checked for warnings, there are none
• Removed all console.logs
• Merged the latest changes from main onto my branch with git pull origin main
• My changes don't cause any responsiveness issues
• First PR at Formbricks? Please sign the CLA! Without it we wont be able to merge it 🙏

Appreciated

• If a UI change was made: Added a screen recording or screenshots to this PR
• Updated the Formbricks Docs if changes were necessary

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[github-actions]

Thank you for following the naming conventions for pull request titles! 🙏

[mattinannt]

@Dhruwang thanks for the change :-) 💪

The issue you referenced also includes the following request:

2. The interactive area of the close icon is just 16x16px. This makes is hard to close the survey on mobile devices and does not comply with WCAG standards. see fix: improve a11y of survey modal close button #1661

Can you please also fix this issue in this PR? :-)

[mattinannt]

@Dhruwang thanks for the changes; looks great! :-)