/* ============================================
   Revvi — Scroll Reveal CSS
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--reveal-delay, 0) * 100ms);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Subtler variant for large elements (full sections) —
   less vertical travel so big blocks don't feel like they're
   "dropping in" */
.reveal-fade {
  opacity: 0;
  transition: opacity 0.8s ease;
  transition-delay: calc(var(--reveal-delay, 0) * 100ms);
}
.reveal-fade.visible {
  opacity: 1;
}

/* Nav bar: transparent-over-hero → solid once scrolled.
   Add class="nav" + id="siteNav" to your existing nav element;
   this only adds a background/shadow transition, doesn't change
   your existing layout. */
#siteNav {
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
#siteNav.scrolled {
  background-color: #0D162B;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

/* Respect visitors who've asked for reduced motion at the OS level */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-fade {
    opacity: 1;
    transform: none;
    transition: none;
  }
}