Responsive Testimonials layout using CSS Grid

I’d say the result looks correct at all breakpoints, but I’m not quite confident about how I implemented it. It feels like the way I’ve written it (explicitly defining columns, rows, and grid areas for each card) is too rigid and not really practical – for example, if the content of a card changes or if new cards are added, the whole layout breaks or I need to set new grid areas manually.

I'd like to know how to make the layout both match the design and be more flexible at the same time? I tried using auto-fit for the columns, but it messed up the entire layout. I'm still a beginner with CSS Grid, so I’d really appreciate any tips or feedback :-)