CSS media rule mixes all types of screens together
From https://lists.torproject.org/pipermail/tor-relays/2019-March/017101.html:
But about the problematic layout that now exists, in general, the CSS
media rule mixes all types of screens together regardless of
orientation, aspect ratio or size. So mobile and multi-screen desktops
all fall under the 'all' or 'screen' values.