[Bug]: Mobile navigation drawer overlay is pierced by page headings (z-index issue)

[Shrutiii01]

Issue Description:
Describe the bug
When opening the mobile navigation/sidebar menu on documentation or tutorial pages, the main article page headings (e.g., titles like "50 Git commands Cheatsheet" or "How to Create Milestone on GitHub") render on top of or bleed through the mobile navigation drawer menu content.

To Reproduce
Open a tutorial/documentation article page on a mobile viewport.
Click the hamburger menu icon to trigger the slide-out navigation menu.
Observe that the main article title text stays aggressively layered over the sidebar links, making menu options unreadable and broken.

Expected behavior
The mobile navigation drawer container should have a higher layering priority. When active, it should completely overlay all main page content, including headings, without any text bleeding through.

Screenshots / Video

overlapping.error.mp4

[github-actions]

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[github-actions]

Thanks for opening this issue. To help maintainers review it faster, please add the missing details below:

• Steps to reproduce the issue are present but could benefit from more specificity (e.g., which mobile devices or browsers were tested).
• Information about the operating system and browser versions used when the issue was observed is missing.
• Expected behavior is described, but additional information about the current z-index values of the elements involved would be helpful for the maintainers.

[Shrutiii01]

I want to fix this issue please assigne me this work

[github-actions]

👤 Issue assigned to @Shrutiii01.