/* The SVG operates exclusively on the sampled backdrop. Existing foreground,
   fills, highlights, shadows, pointer responses, motion and geometry stay intact. */
html[data-optics="refraction"] [data-optical-active] {
  -webkit-backdrop-filter: var(--optical-backdrop) !important;
  backdrop-filter: var(--optical-backdrop) !important;
}
/* Static maps do not follow the pointer or animate, including reduced-motion mode.
   Unsupported engines never acquire data-optical-active and keep the original glass. */