/* =========================================================
   ANIMATIONS.CSS
   Animações discretas (docs/design-system.md §10).
   Reveal-on-scroll é orquestrado por assets/js/animations.js
   via IntersectionObserver, que adiciona a classe .is-visible.
   ========================================================= */

/* ---------- Reveal on scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay escalonado para grupos de itens (cards em grid) */
[data-reveal-group] > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-group] > *:nth-child(2) { transition-delay: 60ms; }
[data-reveal-group] > *:nth-child(3) { transition-delay: 120ms; }
[data-reveal-group] > *:nth-child(4) { transition-delay: 180ms; }
[data-reveal-group] > *:nth-child(5) { transition-delay: 240ms; }
[data-reveal-group] > *:nth-child(6) { transition-delay: 300ms; }

/* ---------- Fade-in simples (hero) ---------- */
@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.hero__content {
  animation: fade-in 600ms var(--ease-out);
}

/* ---------- Shimmer (skeleton / loading) ---------- */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-neutral-100) 25%,
    var(--color-neutral-200) 37%,
    var(--color-neutral-100) 63%
  );
  background-size: 200% 100%;
  animation: shimmer 1.2s ease-in-out infinite;
  border-radius: var(--radius-md);
}

/* ---------- Spin (loading em botão) ---------- */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.btn__spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

/* ---------- Float (trophy card / chips flutuantes no Hero) ---------- */
@keyframes float-y {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ---------- Bounce (indicador de scroll do Hero) ---------- */
@keyframes bounce-y {
  0%,
  100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, 6px);
  }
}

/* ---------- Pulse (badge "ao vivo" — reservado p/ futuras páginas) ---------- */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.is-live {
  animation: pulse 1.6s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__content {
    animation: none;
  }

  .is-live,
  .skeleton,
  .btn__spinner {
    animation: none;
  }
}