Changed1
Below 640px the home and the public pages get a phone chrome of their own: a 56px top bar, a bottom tab bar with Home, Drive, Create NMTS key, Developers and More, sections that each fill the screen, and the cases, comparison rows, key-loss table, paths and open-source items as cards you swipe sideways.
The first phone layout was still the desktop column set narrow: the header kept its desktop height, the two account actions sat inside a full-screen menu, and every card grid ran down the page. The top bar is now 56px, the two actions and the three most-used places are under the thumb at all times, and repeated cards are swiped sideways with dots below showing the place. What it still does not do: the updates, stats, notices and terms pages keep the app's own header and have no tab bar yet.