/* ===== Reveal on Scroll ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ===== Fade In Up ===== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.fade-in-up:nth-child(2) {
  animation-delay: 0.2s;
}

.fade-in-up:nth-child(3) {
  animation-delay: 0.4s;
}

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

/* ===== Stagger Children ===== */
.stagger-in > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-in.visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger-in.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-in.visible > *:nth-child(3) { transition-delay: 0.15s; }
.stagger-in.visible > *:nth-child(4) { transition-delay: 0.2s; }
.stagger-in.visible > *:nth-child(5) { transition-delay: 0.25s; }
.stagger-in.visible > *:nth-child(6) { transition-delay: 0.3s; }
.stagger-in.visible > *:nth-child(7) { transition-delay: 0.35s; }
.stagger-in.visible > *:nth-child(8) { transition-delay: 0.4s; }
.stagger-in.visible > *:nth-child(9) { transition-delay: 0.45s; }
.stagger-in.visible > *:nth-child(10) { transition-delay: 0.5s; }

.stagger-in.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Smooth Page Transitions ===== */
.gallery-item {
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.gallery-item.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ===== Shimmer loading placeholder ===== */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-secondary) 25%,
    var(--color-accent) 50%,
    var(--color-secondary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}