Responsive font color on Toolkit landing page cards

Currently the Toolkit cards do not have responsive text color based on if the background is light or dark. This functionality exists on the homepage and should be replicated on to this page.

Start by comparing the Toolkit landing page cards with the homepage implementation that already handles text color for light and dark backgrounds. Identify the corresponding card styles, then verify the text remains readable across the responsive light and dark card variants.

Written by the indexing model from the issue text.