/* Linear stagger - equal delays */
.item:nth-child(n) {
  transition-delay: calc(var(--index) * 50ms);
}

/* Accelerating stagger - getting faster */
.item:nth-child(1) { transition-delay: 0ms; }
.item:nth-child(2) { transition-delay: 80ms; }
.item:nth-child(3) { transition-delay: 140ms; }
.item:nth-child(4) { transition-delay: 180ms; }

/* Decelerating stagger - slowing down */
.item:nth-child(1) { transition-delay: 0ms; }
.item:nth-child(2) { transition-delay: 40ms; }
.item:nth-child(3) { transition-delay: 100ms; }
.item:nth-child(4) { transition-delay: 180ms; }

/* Cohesive family - same curve, different durations */
.primary { transition: all 400ms cubic-bezier(0.16, 1, 0.3, 1); }
.secondary { transition: all 350ms cubic-bezier(0.16, 1, 0.3, 1); }
.tertiary { transition: all 300ms cubic-bezier(0.16, 1, 0.3, 1); }

/* Sequence curve - smooth start, confident end */
animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);

/* Staggered reveal system */
.orchestrated-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 300ms ease-out,
              transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Apply delays via CSS custom properties or nth-child */
.orchestrated-item:nth-child(1) { transition-delay: 0ms; }
.orchestrated-item:nth-child(2) { transition-delay: 75ms; }
.orchestrated-item:nth-child(3) { transition-delay: 150ms; }
.orchestrated-item:nth-child(4) { transition-delay: 225ms; }

// JS orchestration for complex sequences
const sequence = [
  { el: '.hero', delay: 0, duration: 500 },
  { el: '.title', delay: 100, duration: 400 },
  { el: '.subtitle', delay: 200, duration: 350 },
  { el: '.cta', delay: 350, duration: 400 },
];