/* ==========================================================================
   Control-F — Pattern-preview chrome
   One rule, for the one element every pattern page carries that the real
   site never will: the fixed link in the bottom-left corner that leads back
   out of the preview and into the documentation. None of this ships to
   control-f.de — in production the .ds-back nav is removed, and the link tag
   that loads this file goes with it.

   It is a stylesheet rather than a per-page <style> block because it used to
   be fourteen per-page blocks, byte for byte, and the census caught the
   copies under prototypes/ already forked — a hardcoded z-index: 9999 where
   this rule stays under --z-overlay, and token fallbacks spelling out the
   values the tokens already own. A rule that must render identically on
   every page it appears on cannot be maintained as seventeen private copies.
   check-class-provenance.py holds the fold closed: preview chrome is
   declared here and nowhere else on the gated surface.
   ========================================================================== */

.ds-back {
  /* Under --z-overlay: preview chrome must never cover real UI, and the
     consent banner sits in that layer along this edge. */
  position: fixed; left: 0; bottom: 0; z-index: calc(var(--z-overlay) - 1);
  padding: var(--space-2) var(--space-4);
  background: var(--cf-schwarz); color: var(--grey-000);
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: var(--tracking-label); text-transform: uppercase;
}