/* =========================================================================
   Make My — 3D x-ray toggle

   Chrome for CoreXray: the eye button in the preview toggle strip that drives
   tier visibility. The see-through treatment itself is a material swap in the
   3D scene, so there is nothing else to style here.

   Product-agnostic, like the engine — Door is the first consumer but nothing
   here knows what a door is. Light-only, matching the rest of the configurator
   (core-configurator.css); there is deliberately no prefers-color-scheme block,
   for the same reason core-dimension-overlay.css has none.
   ========================================================================= */

/* --- Eye toggle button ---------------------------------------------------
   A tool in the top-right .core-preview-toggle strip. X-ray is a 3D
   affordance (the 2D drawing shows hidden detail by its own conventions).
   Its box, its Paper divider from its neighbour, the 3D-only gate and its
   on / partial fill states — off → on for Door, off → fronts → all for the
   carcass modules — are written once for every tool in core-configurator.css
   ("Preview toolbar" and "Tool states"), so this sheet carries no rule for
   the button. Every tool is divided from the next: two labels running
   together with no rule between them read as one control with a long name. */