/* ==========================================================================
   JULIÉE — EFECTOS VISUALES, ANIMACIONES Y PARALAJE
   ========================================================================== */

/* Animación sutil de levitación / flotación */
@keyframes floatSubtle {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px);
  }
}

/* Pulsación de luz / Resplandor */
@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.25);
    border-color: rgba(212, 175, 55, 0.35);
  }
  50% {
    box-shadow: 0 0 35px rgba(212, 175, 55, 0.5);
    border-color: rgba(212, 175, 55, 0.7);
  }
}

/* Rebote suave del scroll indicator */
@keyframes bounceSoft {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-6px);
  }
  60% {
    transform: translateY(-3px);
  }
}

/* Desplazamiento de la rueda del ratón */
@keyframes scrollWheel {
  0% {
    opacity: 1;
    transform: translate(-50%, 0);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, 12px);
  }
}

/* Ecualizador del reproductor de sonido */
@keyframes soundwave {
  0% {
    height: 3px;
  }
  100% {
    height: 14px;
  }
}

/* Brillo resplandeciente en texto dorado */
.text-shimmer-gold {
  background: linear-gradient(90deg, #d4af37, #fff1b8, #e6c387, #d4af37);
  background-size: 200% auto;
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  animation: shine 4s linear infinite;
}

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

/* IMPORTANTE: Elementos siempre visibles por defecto (nunca opacos ni ocultos) */
.reveal-on-scroll {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ==========================================================================
   SISTEMA DE PARALAJE 3D & PROFUNDIDAD CINEMATOGRÁFICA
   ========================================================================== */

/* Perspectiva tridimensional para las secciones inmersivas */
.song-immersive-section {
  perspective: 1200px;
  perspective-origin: center center;
}

/* Tarjeta con transform-style 3D para permitir elevación de capas internas */
.song-container-wide {
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.3, 1), 
              border-color 0.4s ease, 
              box-shadow 0.4s ease;
  position: relative;
}

/* Efecto especular de reflejo de luz que viaja con el movimiento 3D */
.song-container-wide::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(255, 255, 255, 0.08),
    transparent 50%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 1;
}

.song-container-wide:hover::after {
  opacity: 1;
}

/* Columna de Vídeo con Elevación 3D en el eje Z */
.song-video-column {
  transform: translateZ(28px);
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.3, 1);
}

/* Marco cinematográfico flotante con sombra volumétrica dinámica */
.cinema-screen-frame {
  transform-style: preserve-3d;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.3, 1), 
              box-shadow 0.35s ease;
}

.song-container-wide:hover .cinema-screen-frame {
  transform: translateZ(16px) scale(1.015);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.92), 0 0 50px var(--glow-color, var(--gold-glow));
}

/* Columna Editorial & Letra con elevación Z ligeramente menor (desacoplada) */
.song-editorial-column {
  transform: translateZ(18px);
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.3, 1);
}

.song-main-title {
  transform: translateZ(10px);
}

.song-tagline, .song-quote-card {
  transform: translateZ(6px);
}

/* Tarjeta de cita con profundidad */
.song-quote-card {
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.song-container-wide:hover .song-quote-card {
  transform: translateZ(12px);
  border-left-color: var(--accent-color, var(--gold-accent));
}

/* Paralafe en Orbes Ambientales */
.ambient-glow {
  will-change: transform;
  transition: transform 0.1s linear, opacity 1s ease;
}

/* Efecto de inclinación para Banners de Introducción de Capítulo */
.chapter-intro-banner {
  transform-style: preserve-3d;
  will-change: transform;
}

.chapter-title {
  transition: transform 0.3s ease;
}

.chapter-intro-banner:hover .chapter-title {
  transform: translateZ(15px);
}

/* Optimización para dispositivos con preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  .song-container-wide,
  .song-video-column,
  .song-editorial-column,
  .ambient-glow,
  .cinema-screen-frame {
    transform: none !important;
    transition: none !important;
  }
}