[UI/UX] Add Light Theme Toggle

[gitikaK]

Current Design/Experience

The site currently uses a dark-only theme. Adding an optional light theme would improve accessibility and user comfort for those who prefer light backgrounds, especially in bright environments.

Proposed Improvement

• Add a light/dark theme toggle
• Use CSS variables for theming
• Persist user preference (e.g., localStorage)

This would be a small, non-breaking UI enhancement.

Which Page/Section? (Optional)

No response

Mockups or Examples

No response

User Impact (Optional)

Moderate improvement

User Benefit (Optional)

No response

Before Submitting

• I have searched existing issues for similar suggestions
• This is focused on UI/UX (not a new feature request)

[akash-kumar-dev]

Assigning this issue to @gitikaK. Looking forward to your solution. Could you please confirm if you're willing to work on this, and if so, whether you'll be contributing as part of SWOC 26?

[gitikaK]

Assigning this issue to @gitikaK. Looking forward to your solution. Could you please confirm if you're willing to work on this, and if so, whether you'll be contributing as part of SWOC 26?

hey, yes I’m definitely willing to work on this :) and yes I’ll be contributing as a part of SWOC 26. thanks!

[akash-kumar-dev]

Thanks for the update, @gitikaK! Looking forward to seeing your solution.

[gitikaK]

Thanks for the update, @gitikaK! Looking forward to seeing your solution.

sure! also, can you add an easy/medium/hard level tag as well? thank you!

[akash-kumar-dev]

added Medium label on this issue