/* The played 3D game's one visual difference from every other style.

   Everything about a played game's page — the letterboxed canvas, the start screen,
   the game-over board — is shared, in frame.css. This file exists for the single
   value that SHOULD differ per style: the colour behind the cover image, which
   shows through wherever the cover doesn't reach and while it is still loading.

   These files used to hold a full copy of the start screen each, which is how
   they drifted into slightly different looks. Keep it that way: if you find
   yourself adding a rule here, it almost certainly belongs in frame.css. */
:root { --frame-backdrop: #16233d; }