[Documentation Update]: Enhance CSS for Health Tips Page

[NirajD04]

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Issue Description

The CSS for the health tips page requires enhancements to improve the overall aesthetics, responsiveness, and user experience.

Suggested Change

Scrollbar Customization:

Implement custom scrollbar styles while maintaining a clean look (currently hidden).
Health Tips Container:

Update the padding and background color to enhance visual appeal.
Section Title:

Increase the font size and style to make section titles more prominent.

Rationale

No response

Urgency

High

Record

• I have read the Contributing Guidelines
• I'm a GSSOC-EXT contributor
• I'm a HACKTOBERFEST contributor
• I have starred the repository

[NirajD04]

please assign this to me

[GAVINESHWAR]

@NirajD04, please add the reference photos