/* Animations au scroll — Global Advice
   Approche : entrées marquées (amplitude + légère rotation/échelle), déclenchées une fois
   par IntersectionObserver (voir js/reveal.js). Respecte prefers-reduced-motion. */

.reveal,
.reveal-left,
.reveal-right,
.reveal-scale {
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}
.reveal { transform: translateY(60px); }
.reveal-left { transform: translateX(-90px) rotate(-2deg); }
.reveal-right { transform: translateX(90px) rotate(2deg); }
.reveal-scale { transform: scale(0.86) translateY(20px); }

.reveal.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible {
    opacity: 1;
    transform: translate(0, 0) scale(1) rotate(0deg);
}
.reveal-scale.is-visible {
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Groupes : les enfants directs se révèlent en cascade marquée */
.reveal-group > * {
    opacity: 0;
    transform: translateY(48px) scale(0.96);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: opacity, transform;
}
.reveal-group.is-visible > * { opacity: 1; transform: translateY(0) scale(1); }

.reveal-group.is-visible > *:nth-child(1) { transition-delay: 0.04s; }
.reveal-group.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-group.is-visible > *:nth-child(3) { transition-delay: 0.20s; }
.reveal-group.is-visible > *:nth-child(4) { transition-delay: 0.28s; }
.reveal-group.is-visible > *:nth-child(5) { transition-delay: 0.36s; }
.reveal-group.is-visible > *:nth-child(6) { transition-delay: 0.44s; }
.reveal-group.is-visible > *:nth-child(7) { transition-delay: 0.52s; }
.reveal-group.is-visible > *:nth-child(8) { transition-delay: 0.60s; }
.reveal-group.is-visible > *:nth-child(9) { transition-delay: 0.68s; }
.reveal-group.is-visible > *:nth-child(10) { transition-delay: 0.76s; }

/* Variante rapide : petites listes (icônes, badges) qui doivent apparaître vite */
.reveal-group-fast > * {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.reveal-group-fast.is-visible > * { opacity: 1; transform: translateY(0); }
.reveal-group-fast.is-visible > *:nth-child(1) { transition-delay: 0.02s; }
.reveal-group-fast.is-visible > *:nth-child(2) { transition-delay: 0.06s; }
.reveal-group-fast.is-visible > *:nth-child(3) { transition-delay: 0.10s; }
.reveal-group-fast.is-visible > *:nth-child(4) { transition-delay: 0.14s; }
.reveal-group-fast.is-visible > *:nth-child(5) { transition-delay: 0.18s; }
.reveal-group-fast.is-visible > *:nth-child(6) { transition-delay: 0.22s; }
.reveal-group-fast.is-visible > *:nth-child(7) { transition-delay: 0.26s; }

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