Menu bar from the centre to left only on Mobile site

Require adjustment to mobile header: move the menu bar from center to the left corner on the homepage only. All other site areas function correctly. Implement a responsive solution that targets mobile viewports, preserves existing styling and behavior, and avoids affecting desktop or other pages. Provide clean, maintainable code changes with brief notes on files modified and steps to test on typical mobile resolutions. Compatibility with common browsers and minimal impact on performance is essential.