hide overflow
add site title
update global header for large screens
improve global header spacing
include mobile nav trigger
first pass at mobile site navigation
move around z-index values
crazy big z-index
squish js
reintroduce full header at mobile sizes
adjust subhead wayfinding in mobile
merge upstream
create single template for main-header area
remove hard coded link to landing page
sxs header
no longer hide site title on landing page
simplify mobile nav toggle
properly offset sxs header
better z-index on mobile
merge upstream