.stagger-1 { animation-delay: 0.1s; opacity: 0; }
.stagger-2 { animation-delay: 0.2s; opacity: 0; }
.stagger-3 { animation-delay: 0.4s; opacity: 0; }
.stagger-4 { animation-delay: 0.6s; opacity: 0; }

.fade-in-section {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}