/* ── Scroll reveal ── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

/* ── Fade in from different directions ── */

.reveal-left {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-right {
  opacity: 0;
  transform: translateX(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-left.is-visible,
.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Scale in ── */

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ── Stagger children ── */

.stagger-children > * {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 80ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(7) { transition-delay: 480ms; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(8) { transition-delay: 560ms; opacity: 1; transform: translateY(0); }

/* ── Prefers reduced motion ── */

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale,
  .stagger-children > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}