Change to mobile device appearance/format?

Until very recently (around 24 hours, give or take), the appearance of the site's classifieds sections was the same as that when viewed on my desktop computer. In the last day, it looks like the presentation as viewed on my phone is significantly different. Things are larger. Information immediately shown is less, for lack of a better word, rich. Is information being presented differently to mobile devices now? I thought it was just me (and I am full of self-doubt) at first, but another member just asked me about it and that leads me to believe this is probably not a coincidentally shared hallucination.