/* ============================================================
   animations.css — Tech·ES
   Keyframes y clases de animación. Respeta prefers-reduced-motion.
   ============================================================ */

/* ── KEYFRAMES ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-24px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

/* ── REVEAL ON SCROLL ── */
.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.55s ease,
    transform 0.55s ease;
  transition-delay: var(--delay, 0s);
}
.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-fade {
  opacity: 0;
  transition: opacity 0.6s ease;
  transition-delay: var(--delay, 0s);
}
.reveal-fade.visible { opacity: 1; }

/* ── PAGE TRANSITIONS ── */
.page-enter {
  animation: fadeIn 0.35s ease forwards;
}

/* ── SKELETON LOADERS ── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-border) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-md);
}

/* ── SEARCH OVERLAY ── */
.search-overlay {
  animation: none;
}
.search-overlay.active {
  animation: fadeIn 0.2s ease forwards;
}

/* ── MOBILE NAV ── */
@media (max-width: 900px) {
  .main-nav.open {
    animation: slideInLeft 0.25s ease forwards;
  }
}

/* ── HERO ENTRANCE (first paint) ── */
.hero-main {
  animation: fadeInUp 0.6s ease 0.1s both;
}
.hero-sidebar {
  animation: fadeInUp 0.6s ease 0.25s both;
}

/* ── CARD HOVER LIFT (complementa CSS transform en components.css) ── */
/* ya manejado con transition en .article-card */

/* ── NEWSLETTER BUTTON PULSE ── */
.btn-primary:focus-visible {
  animation: pulse 0.5s ease;
}

/* ── BACK TO TOP ── */
.back-to-top {
  animation: scaleIn 0.2s var(--transition-spring) both;
}

/* ══════════════════════════════════════
   PREFERS REDUCED MOTION
   Respeta la configuración del SO/navegador
══════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal-up,
  .reveal-fade {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-main,
  .hero-sidebar {
    animation: none;
    opacity: 1;
  }
}