/* Immersion colour: when the words step aside, the colour must stay — and deepen.
   Loaded after style.css so these idle rules win. */

body[data-idle='true']::before {
  animation:
    nebula 96s ease-in-out infinite alternate,
    nebula-bloom 38s ease-in-out infinite;
}

@keyframes nebula-bloom {
  0%, 100% { filter: blur(40px) saturate(1.4) brightness(1.2); }
  50% { filter: blur(46px) saturate(1.65) brightness(1.34); }
}

/* the vignette breathes without ever swallowing the nebula */
@keyframes void-breathe {
  0%, 100% { opacity: 0.84; transform: scale(1.02); }
  50% { opacity: 0.7; transform: scale(1.06); }
}

/* the sky itself keeps a little more chroma once the interface is gone */
@keyframes sky-drift {
  0%, 100% { filter: saturate(1.16) brightness(1.05); }
  50% { filter: saturate(1.32) brightness(1.11); }
}

@media (prefers-reduced-motion: reduce) {
  body[data-idle='true']::before {
    animation: none;
    filter: blur(40px) saturate(1.4) brightness(1.2);
  }
  body[data-idle='true'] #sky { filter: saturate(1.16) brightness(1.05); }
  body[data-idle='true'] #app::after { opacity: 0.84; }
}