bug: left panel text invisible in light mode on Guide page

[sssimransingh26-bit]

Bug Report

What happened?

On the Guide page, the left panel (Setup Roadmap section) has
a dark background with dark text, making the menu items
(01, 02, 03) invisible in light mode.

Steps to reproduce

1. Open the ARVIO website
2. Switch to light mode
3. Navigate to the Guide page
4. Observe the left panel - text is not visible

Expected behavior

The left panel text and background should adapt to light mode,
making all menu items clearly readable.

Actual behavior

Dark background with dark text makes the left panel content
invisible in light mode.

Screenshots

Checklist

• I have searched existing issues and this is not a duplicate
• I agree to follow this project's Code of Conduct