/* R91 review candidate. Append after the accepted R28 styles.
   The existing SVG core and halo paths, source colors, individual periods,
   phase offsets, play-state and system-motion guards remain authoritative. */
.secondary-page-hero:is([data-page-art="shop"],[data-page-art="artists"],[data-page-art="support"])
 .secondary-motion-r28 [data-lamp] .lamp-trough {
  opacity: 0;
  animation-name: none;
}
.secondary-page-hero:is([data-page-art="shop"],[data-page-art="artists"],[data-page-art="support"])
 .secondary-motion-r28 [data-lamp] .lamp-emission {
  opacity: .40;
  animation-name: secondary-source-breath-r91;
  animation-timing-function: cubic-bezier(.45,0,.55,1);
}
.secondary-page-hero:is([data-page-art="shop"],[data-page-art="artists"],[data-page-art="support"])
 .secondary-motion-r28 [data-lamp] .lamp-halo {
  opacity: .075;
  animation-name: secondary-halo-breath-r91;
  animation-timing-function: cubic-bezier(.45,0,.55,1);
}
@keyframes secondary-source-breath-r91 {
  0%,100% { opacity: .40; }
  45%,55% { opacity: .88; }
}
@keyframes secondary-halo-breath-r91 {
  0%,100% { opacity: .075; }
  45%,55% { opacity: .18; }
}