/* ==========================================================================
   ANIMATIONS — Keyframes, scroll-reveal classes, reduced-motion
   ========================================================================== */

/* Keyframes */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes heroReveal {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   SCROLL REVEAL — Tier B
   ========================================================================== */

/* Pre-animation state */
.reveal {
  opacity: 0;
  transform: translateY(24px);
}

/* Revealed state */
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-reveal) var(--ease-reveal),
              transform var(--duration-reveal) var(--ease-reveal);
}

/* Stagger delays for child elements */
.reveal-stagger-1 { transition-delay: calc(var(--stagger-delay) * 1); }
.reveal-stagger-2 { transition-delay: calc(var(--stagger-delay) * 2); }
.reveal-stagger-3 { transition-delay: calc(var(--stagger-delay) * 3); }
.reveal-stagger-4 { transition-delay: calc(var(--stagger-delay) * 4); }
.reveal-stagger-5 { transition-delay: calc(var(--stagger-delay) * 5); }
.reveal-stagger-6 { transition-delay: calc(var(--stagger-delay) * 6); }

/* ==========================================================================
   REDUCED MOTION — Accessibility
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}