From 960px up the box takes a quarter of the window width, between the
256px it was designed around and a 480px cap — on a 1720px window that
is 353px beside the header nav, where it used to be 196px. Small windows
keep the fixed width, the nav still takes its 60px when it lives in the
header, and the fit rule reads the box's real edge, so the nav goes
compact by itself when the wider box leaves it no room.
cc
vicrodh
ba6d296443