/* Palette overrides. Empty in production: the colours are the defaults in style.css.
   On the mock site (tools/serve.py, port 5052) the logo tuner's "Use on mock site" button writes
   site-local/theme.css, served in place of this file, which sets --primary/--secondary/--accent
   and the --mock-* link and rule colours from the draft logo. site-local/ is never deployed. */