/* Bootstrap's own palette, and the only file here that declares nothing.

   The eight beside it work by overriding upstream's `:root`, so having upstream's
   palette back is a matter of dropping their block rather than of writing one — and
   swapping this link in is how a toggle drops it. Linking no palette at all and linking
   this one are the same look by two routes.

   It is named so the toggle can reach it. A reader who rotates through nine palettes
   and never finds the one the pages started in has been shown a door with no handle
   on the inside. */