/* Fade-in (IntersectionObserver — main.js) */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s var(--ease-expo),
    transform 0.7s var(--ease-expo);
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* Stagger pour les grilles */
.testimonials-grid .testimonial-card.fade-in:nth-child(2) {
  transition-delay: 0.1s;
}

.testimonials-grid .testimonial-card.fade-in:nth-child(3) {
  transition-delay: 0.2s;
}

.advantages-grid .advantage-item.fade-in:nth-child(2) {
  transition-delay: 0.08s;
}

.advantages-grid .advantage-item.fade-in:nth-child(3) {
  transition-delay: 0.16s;
}

.advantages-grid .advantage-item.fade-in:nth-child(4) {
  transition-delay: 0.24s;
}

.categories-grid .category-card.fade-in:nth-child(2) {
  transition-delay: 0.07s;
}

.categories-grid .category-card.fade-in:nth-child(3) {
  transition-delay: 0.14s;
}

.categories-grid .category-card.fade-in:nth-child(4) {
  transition-delay: 0.21s;
}

.categories-grid .category-card.fade-in:nth-child(5) {
  transition-delay: 0.28s;
}