*{
  scroll-behavior: smooth;
}
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s cubic-bezier(.22,.61,.36,1), transform .6s cubic-bezier(.22,.61,.36,1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Variante zoom (opcional) */
.reveal-zoom { transform: scale(.98); }
.reveal-zoom.is-visible { transform: scale(1); }

/* Acessibilidade: respeita quem prefere menos movimento */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-zoom {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}