/* ==========================================================================
   Animations — Subtle, purposeful motion
   ========================================================================== */

/* ---------- Reveal Animations ---------- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

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

/* Stagger children */
.reveal-stagger .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger .reveal:nth-child(2) { transition-delay: 100ms; }
.reveal-stagger .reveal:nth-child(3) { transition-delay: 200ms; }
.reveal-stagger .reveal:nth-child(4) { transition-delay: 300ms; }
.reveal-stagger .reveal:nth-child(5) { transition-delay: 400ms; }
.reveal-stagger .reveal:nth-child(6) { transition-delay: 500ms; }
.reveal-stagger .reveal:nth-child(7) { transition-delay: 600ms; }

/* Reveal from left */
.reveal--left {
  transform: translateX(-30px);
}

.reveal--left.is-visible {
  transform: translateX(0);
}

/* Reveal from right */
.reveal--right {
  transform: translateX(30px);
}

.reveal--right.is-visible {
  transform: translateX(0);
}

/* Scale reveal (for images) */
.reveal--scale {
  transform: scale(0.96);
}

.reveal--scale.is-visible {
  transform: scale(1);
}

/* ---------- Hero Entrance ---------- */

.hero__content .hero__name-en {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance var(--duration-slower) var(--ease-out) 300ms forwards;
}

.hero__content .hero__name-fa {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance var(--duration-slower) var(--ease-out) 600ms forwards;
}

.hero__content .hero__accent-line {
  opacity: 0;
  transform: scaleX(0);
  animation: lineReveal var(--duration-slower) var(--ease-out) 900ms forwards;
}

.hero__content .hero__tagline {
  opacity: 0;
  animation: fadeIn var(--duration-slower) var(--ease-out) 1100ms forwards;
}

.scroll-indicator {
  opacity: 0;
  animation: fadeIn var(--duration-slow) var(--ease-out) 1800ms forwards;
  animation-fill-mode: forwards;
}

@keyframes heroEntrance {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes lineReveal {
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

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

/* ---------- Reduced Motion ---------- */

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

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero__content .hero__name-en,
  .hero__content .hero__name-fa,
  .hero__content .hero__accent-line,
  .hero__content .hero__tagline,
  .scroll-indicator {
    opacity: 1;
    transform: none;
    animation: none;
  }
}