/* theme-dark.css — intentionally empty seam.

   The brief expected a dark-theme variable block to split out here. Legacy
   index.html does not have one: it declares a single :root{} token block and
   that palette is LIGHT (--bg:#f2f2f2; --surface:#ffffff; --text:#1a1a1a).
   The only dark surface is the #gate splash, which hard-codes var(--black).

   Moving the light :root tokens into a file named theme-dark.css would be
   actively misleading, and splitting them out buys nothing while risking a
   cascade change, so per the brief's "when in doubt keep it in optimacat.css"
   they stayed put. This file exists as the seam for real theming work and is
   loaded after optimacat.css so overrides land last. */