/* ==========================================================================
   Omega DST — Animaciones de entrada
   Se activan al hacer scroll vía IntersectionObserver (js/main.js).
   Si el usuario prefiere menos movimiento, base.css ya neutraliza las
   transiciones globalmente (prefers-reduced-motion), así que estos
   estilos se degradan a "visible sin animar" automáticamente.
   ========================================================================== */

/* Contenido "above the fold" (hero): anima al cargar con CSS puro,
   nunca depende de que JS termine de ejecutarse, para evitar un
   destello en blanco en la primera pintura de la página. */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-immediate {
  animation: fade-in-up 700ms var(--ease-standard) both;
}
.fade-in-immediate.delay-1 { animation-delay: 120ms; }

@media (prefers-reduced-motion: reduce) {
  .fade-in-immediate { animation: none; opacity: 1; transform: none; }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms var(--ease-standard), transform 700ms var(--ease-standard);
  will-change: opacity, transform;
}

[data-reveal].is-inview {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-standard), transform 600ms var(--ease-standard);
}

[data-reveal-group].is-inview > * {
  opacity: 1;
  transform: translateY(0);
}

/* Retraso escalonado para grupos (tarjetas, grids) */
[data-reveal-group].is-inview > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-group].is-inview > *:nth-child(2) { transition-delay: 80ms; }
[data-reveal-group].is-inview > *:nth-child(3) { transition-delay: 160ms; }
[data-reveal-group].is-inview > *:nth-child(4) { transition-delay: 240ms; }
[data-reveal-group].is-inview > *:nth-child(5) { transition-delay: 320ms; }
[data-reveal-group].is-inview > *:nth-child(6) { transition-delay: 400ms; }

/* Si JS no carga (o el usuario prefiere menos movimiento), el contenido
   debe seguir siendo visible: no-JS fallback */
.no-js [data-reveal],
.no-js [data-reveal-group] > * {
  opacity: 1;
  transform: none;
}

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