/* A second, quieter depth plane: fish pass behind the lettering, never the controls. */
#fih-arena #pond-top { isolation: isolate; }
#fih-arena #pond-top .hero-background-school { position: absolute; inset: 76px 0 auto; height: min(640px,80%); z-index: 0; pointer-events: none; overflow: hidden; contain: layout paint; }
#fih-arena .background-fish { position: absolute; width: clamp(64px,7vw,106px); opacity: .23; pointer-events: none; }
#fih-arena .background-fish:nth-child(2n) { width: clamp(48px,5vw,76px); opacity: .16; }
#fih-arena .background-fish-response { display: block; width: 100%; }
#fih-arena .background-fish img { display: block; width: 100%; height: auto; image-rendering: pixelated; }
#fih-arena #pond-top .aquarium { z-index: 1; }
#fih-arena .artifact-chapter[data-current-arriving='true'],
#fih-arena .current-orbit[data-current-arriving='true'] { will-change: transform,opacity; }
@media (max-width:480px) {
  #fih-arena .current-orbit strong { font-size: 58px; }
}
@media (max-width:800px) {
  #fih-arena #pond-top .hero-background-school { top: 90px; height: 460px; }
  #fih-arena .background-fish { width: 70px; opacity: .18; }
  #fih-arena .background-fish:nth-child(2n) { width: 50px; opacity: .14; }
}