/* =========================================================
   Metrica — scroll reveal motion
   IntersectionObserver-driven (js/reveal.js). Each [data-reveal]
   node fades in. [data-reveal-stagger] cascades its children
   with 80ms delay between them. Honors prefers-reduced-motion.
   ========================================================= */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms cubic-bezier(.2, .7, .2, 1),
    transform 700ms cubic-bezier(.2, .7, .2, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 600ms cubic-bezier(.2, .7, .2, 1),
    transform 600ms cubic-bezier(.2, .7, .2, 1);
}
[data-reveal-stagger].is-visible > *:nth-child(1) { transition-delay:   0ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(2) { transition-delay:  80ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: none; }
[data-reveal-stagger].is-visible > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}