/* =============================================================
   ANIMATIONS.CSS — Keyframes · Animation utilities
   Responsabilidad: Todas las animaciones y transiciones complejas.
   Los elementos se animan cuando JS añade la clase .is-visible
   via IntersectionObserver (ver animations.js).
   ============================================================= */

/* ── 1. PREFERENCIA DE MOVIMIENTO REDUCIDO ──────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── 2. KEYFRAMES ───────────────────────────────────────────── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideLeft {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  from { background-position: -200% center; }
  to   { background-position: 200% center; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(200, 169, 110, 0.1); }
  50%       { box-shadow: 0 0 40px rgba(200, 169, 110, 0.3); }
}

/* ── 3. CLASES DE ENTRADA (disparadas por JS) ───────────────── */
/* Estado inicial: invisible */
[data-animate] {
  opacity: 0;
}

/* Estado final: visible  */
[data-animate].is-visible {
  animation-fill-mode: both;
  animation-duration: var(--duration-slower);
  animation-timing-function: var(--ease-out);
}

[data-animate="fade-up"].is-visible       { animation-name: fadeUp; }
[data-animate="fade-in"].is-visible       { animation-name: fadeIn; }
[data-animate="slide-left"].is-visible    { animation-name: slideLeft; }
[data-animate="slide-right"].is-visible   { animation-name: slideRight; }
[data-animate="scale-in"].is-visible      { animation-name: scaleIn; }

/* Delays en cascada para listas de elementos */
[data-animate-delay="1"] { animation-delay: 100ms; }
[data-animate-delay="2"] { animation-delay: 200ms; }
[data-animate-delay="3"] { animation-delay: 300ms; }
[data-animate-delay="4"] { animation-delay: 400ms; }
[data-animate-delay="5"] { animation-delay: 500ms; }

/* ── 4. EFECTOS CONTINUOS ───────────────────────────────────── */
.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse-glow {
  animation: pulse-glow 3s ease-in-out infinite;
}

/* ── 5. SHIMMER (skeleton loading) ──────────────────────────── */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-surface) 25%,
    var(--color-surface-2) 50%,
    var(--color-surface) 75%
  );
  background-size: 200% auto;
  animation: shimmer 1.5s linear infinite;
}

/* ── 6. TRANSICIONES DE PAGE ────────────────────────────────── */
.page-enter {
  animation: fadeIn var(--duration-slow) var(--ease-out) both;
}