Documentation page has UI issues after resizing

**After resizing the browser window on the documentation page in Light Mode, multiple UI issues appear.**

The "Back to main menu" text becomes difficult to read because of low contrast and also background of the "Back to main menu" section overlaps with the Podman logo.

The "On this page" search/dropdown text also becomes difficult to read after resizing due to low contrast.

**Expected Behavior**
The "Back to main menu" text should be clearly visible.
The menu background should not overlap the logo.
The "On this page" text should remain readable after resizing.

Start by reproducing the documentation page in Light Mode while resizing the browser, focusing on the “Back to main menu” section and the “On this page” search/dropdown. Inspect the documentation page’s responsive UI styles and verify that the text remains readable and the menu background no longer overlaps the Podman logo at different widths.

Written by the indexing model from the issue text.