style: enhance background

[harmeetsingh11]

Issue that this pull request solves

Closes: #825

Proposed changes

• Updated background styles for improved visibility.
• Checked and adjusted gradients for better contrast.
• Ensured compatibility with light and dark modes.

Screenshots

Before this PR

After this PR

HITK-Tech-Community.mp4

Types of changes

Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (Documentation content changed)
• Other (please describe): enhance background pattern

Checklist

Put an x in the boxes that apply

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• My changes does not break the current system and it passes all the current test cases.

@thevirengarg please review this PR
Thanks

[Kajol-Kumari]

The current background is very neat and standard. I don't want to over-do that so closing this one.