/* ==========================================================================
   ELEFECTOMANDELA.COM - ESTILOS PRINCIPALES (EDICIÓN DEFINITIVA)
   Novela de J.L. Cunha · 2026
   Atmósfera: Thriller Psicoacústico / 2012 Web Clandestina / Sci-Fi Cuántica
   ========================================================================== */

:root {
  --bg-dark: #07090e;
  --bg-card: #0e121a;
  --bg-card-hover: #151b26;
  --bg-alt: #0a0d14;
  --border-color: #1e2638;
  --border-glow: rgba(0, 229, 255, 0.25);
  
  --primary-cyan: #00e5ff;
  --primary-cyan-glow: 0 0 20px rgba(0, 229, 255, 0.4);
  --accent-amber: #f59e0b;
  --accent-amber-glow: 0 0 15px rgba(245, 158, 11, 0.35);
  --accent-crimson: #ef4444;
  --accent-green: #10b981;

  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-bright: #ffffff;

  /* Colores del Lector Claro (Lightbox) */
  --reader-bg: #ffffff;
  --reader-paper: #f8fafc;
  --reader-text: #1e293b;
  --reader-text-muted: #475569;
  --reader-heading: #0f172a;
  --reader-border: #e2e8f0;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-serif: 'Merriweather', 'Georgia', serif;

  --container-width: 1200px;
  --reader-width: 840px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

/* Reset y Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-dark);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

/* Efecto Scanlines CRT */
.scanlines-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 999;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.25) 50%
  ), linear-gradient(
    90deg,
    rgba(255, 0, 0, 0.03),
    rgba(0, 255, 0, 0.01),
    rgba(0, 0, 255, 0.03)
  );
  background-size: 100% 3px, 6px 100%;
  opacity: 0;
  transition: opacity 0.4s ease;
}

body.crt-active .scanlines-overlay {
  opacity: 0.85;
}

/* Tipografía de Utilidad */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-bright);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

a {
  color: var(--primary-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #fff;
}

.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

/* ==========================================================================
   BARRA DE NAVEGACIÓN
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(7, 9, 14, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background var(--transition-normal);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo-text {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-bright);
  text-transform: uppercase;
}

.nav-badge-freq {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  background: rgba(0, 229, 255, 0.12);
  color: var(--primary-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-icon {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  height: 38px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.85rem;
  font-family: var(--font-sans);
}

.btn-icon:hover {
  background: rgba(0, 229, 255, 0.15);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
}

.btn-icon.active {
  background: rgba(0, 229, 255, 0.25);
  border-color: var(--primary-cyan);
  color: #fff;
  box-shadow: var(--primary-cyan-glow);
}

.btn-nav-buy {
  background: linear-gradient(135deg, #ff9900, #ff6600);
  color: #000 !important;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 15px rgba(255, 153, 0, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-nav-buy:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 153, 0, 0.5);
  color: #000;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-bright);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  padding-top: 140px;
  padding-bottom: 90px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 75% 30%, rgba(0, 229, 255, 0.07) 0%, transparent 60%),
              radial-gradient(circle at 20% 70%, rgba(245, 158, 11, 0.05) 0%, transparent 50%),
              var(--bg-dark);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.hero-eyebrow .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-amber);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-amber);
  animation: pulse-glow 2s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  background: linear-gradient(180deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--primary-cyan);
  margin-bottom: 18px;
  line-height: 1.35;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-cyan), #0077ff);
  color: #050810 !important;
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 25px rgba(0, 229, 255, 0.3);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-primary:hover {
  color: #000 !important;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 229, 255, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-bright);
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 26px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
}

.btn-amazon-primary {
  background: linear-gradient(135deg, #ff9900, #ff6600);
  color: #111 !important;
  font-weight: 800;
  box-shadow: 0 8px 25px rgba(255, 153, 0, 0.3);
}

.btn-amazon-primary:hover {
  box-shadow: 0 12px 30px rgba(255, 153, 0, 0.5);
  color: #000 !important;
}

.hero-meta {
  margin-top: 36px;
  display: flex;
  gap: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
}

.meta-item-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.meta-item-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-bright);
}

/* Portada y Media Container */
.book-media-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.book-card-frame {
  position: relative;
  max-width: 380px;
  width: 100%;
  border-radius: var(--radius-md);
  padding: 10px;
  background: linear-gradient(145deg, #182030, #0a0d14);
  border: 1px solid rgba(0, 229, 255, 0.2);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7),
              0 0 35px rgba(0, 229, 255, 0.15);
}

.book-media-box {
  position: relative;
  width: 100%;
  border-radius: calc(var(--radius-md) - 4px);
  overflow: hidden;
  background: #000;
  aspect-ratio: 2 / 3;
}

.book-media-box img,
.book-media-box video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity var(--transition-normal);
}

.book-media-box video {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  opacity: 1;
}

.book-media-box video.hidden-video {
  opacity: 0;
  pointer-events: none;
}

/* Botón flotante para activar el audio del video */
.video-audio-floating-btn {
  position: absolute;
  bottom: 16px;
  right: 16px;
  z-index: 10;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 229, 255, 0.4);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.video-audio-floating-btn:hover {
  background: var(--primary-cyan);
  color: #000;
  border-color: var(--primary-cyan);
}

.video-audio-floating-btn.unmuted {
  background: rgba(0, 229, 255, 0.25);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
}

.media-toggle-controls {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  background: rgba(14, 18, 26, 0.9);
  padding: 5px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.btn-switch {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-switch.active {
  background: var(--primary-cyan);
  color: #050810;
  box-shadow: 0 2px 10px rgba(0, 229, 255, 0.35);
}

/* ==========================================================================
   SECCIÓN SINOPSIS & PREMISA
   ========================================================================== */
.section {
  padding: 95px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 55px auto;
}

.section-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--primary-cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.synopsis-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 50px;
  align-items: center;
}

.quote-box {
  background: rgba(14, 18, 26, 0.8);
  border-left: 4px solid var(--accent-amber);
  padding: 24px 28px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 28px;
  font-style: italic;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: #f1f5f9;
}

.quote-box footer {
  font-style: normal;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 10px;
  font-weight: 600;
}

.synopsis-lead {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-bright);
  line-height: 1.8;
  margin-bottom: 20px;
}

.synopsis-body p {
  color: var(--text-muted);
  line-height: 1.75;
}

.forum-preview-terminal {
  background: #090c12;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
}

.terminal-header {
  background: #111722;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.terminal-content {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}

.thread-row {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.thread-row:last-child {
  border-bottom: none;
}

.thread-name {
  color: var(--primary-cyan);
  font-weight: 500;
}

.thread-user {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ==========================================================================
   CLAVES Y PERSONAJES (LIGHTBOX GALLERY)
   ========================================================================== */
.keys-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 30px;
}

.key-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.key-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-cyan);
  box-shadow: 0 15px 30px -10px rgba(0, 229, 255, 0.2);
}

.key-card-image-box {
  width: 100%;
  height: 220px;
  position: relative;
  overflow: hidden;
  background: #000;
}

.key-card-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.key-card:hover .key-card-image-box img {
  transform: scale(1.06);
}

.key-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(7, 9, 14, 0.85);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--primary-cyan);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
}

.key-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.key-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-bright);
}

.key-card-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.key-card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-cyan);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   MODAL LIGHTBOX (CLAVES Y PERSONAJES)
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 6, 10, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.lightbox-modal.active {
  display: flex;
  opacity: 1;
}

.lightbox-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 860px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 40px rgba(0, 229, 255, 0.15);
  animation: modal-pop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modal-pop {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.lightbox-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.lightbox-close-btn:hover {
  background: var(--accent-crimson);
  border-color: var(--accent-crimson);
}

.lightbox-img-wrap {
  width: 100%;
  height: 340px;
  background: #000;
  position: relative;
}

.lightbox-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #05070c;
}

.lightbox-body {
  padding: 32px 36px;
}

.lightbox-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--primary-cyan);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.lightbox-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-bright);
}

.lightbox-desc {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.8;
}

.lightbox-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.lightbox-btn-nav {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-btn-nav:hover {
  background: rgba(0, 229, 255, 0.15);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
}

/* ==========================================================================
   MODAL LIGHTBOX DE LECTURA (FONDO CLARO, LETRAS OSCURAS)
   ========================================================================== */
.reader-lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(8, 12, 18, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.reader-lightbox-overlay.active {
  display: flex;
  opacity: 1;
}

.reader-lightbox-box {
  background: var(--reader-bg);
  border-radius: var(--radius-lg);
  max-width: 960px;
  width: 100%;
  height: 94vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.65), 0 0 0 1px var(--reader-border);
  animation: modal-pop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.reader-lightbox-header {
  background: var(--reader-paper);
  border-bottom: 1px solid var(--reader-border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-shrink: 0;
}

.reader-audio-bar {
  background: #f0ede4;
  border-bottom: 1px solid var(--reader-border);
  padding: 10px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.reader-audio-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #1e293b;
}

.reader-audio-bar audio {
  flex: 1;
  max-width: 440px;
  height: 34px;
}

.reader-audio-hint {
  font-size: 0.78rem;
  color: #64748b;
  font-weight: 500;
}

.reader-tabs-group {
  display: flex;
  gap: 8px;
}

.btn-reader-tab {
  background: #ffffff;
  border: 1px solid var(--reader-border);
  color: var(--reader-text-muted);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-reader-tab:hover {
  color: var(--reader-heading);
  border-color: #cbd5e1;
}

.btn-reader-tab.active {
  background: #0f172a;
  color: #ffffff;
  border-color: #0f172a;
}

.reader-actions-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reader-font-btn {
  background: #ffffff;
  border: 1px solid var(--reader-border);
  color: var(--reader-heading);
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 800;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.reader-font-btn:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
}

.btn-close-reader {
  background: #ef4444;
  color: #ffffff;
  border: none;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background var(--transition-fast);
}

.btn-close-reader:hover {
  background: #dc2626;
}

.reader-lightbox-body {
  flex-grow: 1;
  overflow-y: auto;
  padding: 50px 70px;
  background: var(--reader-bg);
  color: var(--reader-text);
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.95;
  letter-spacing: 0.01em;
}

.reader-heading {
  font-family: var(--font-sans);
  color: var(--reader-heading);
  font-size: 2rem;
  font-weight: 800;
  margin-top: 20px;
  margin-bottom: 12px;
  text-align: center;
  line-height: 1.3;
}

.reader-date {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #d97706;
  text-align: center;
  margin-bottom: 35px;
}

.reader-lightbox-body p {
  color: var(--reader-text);
  margin-bottom: 1.65rem;
  text-align: justify;
}

.reader-lightbox-body em {
  font-style: italic;
  color: #0f172a;
}

.reader-end-banner {
  margin-top: 60px;
  padding: 35px;
  background: #f8fafc;
  border: 1px solid var(--reader-border);
  border-radius: var(--radius-md);
  text-align: center;
  font-family: var(--font-sans);
}

.reader-end-banner h4 {
  font-size: 1.5rem;
  color: var(--reader-heading);
  margin-bottom: 12px;
}

.reader-end-banner p {
  color: var(--reader-text-muted);
  max-width: 620px;
  margin: 0 auto 24px auto;
  font-size: 1rem;
  text-align: center;
}

/* ==========================================================================
   SECCIÓN DE ACCESO AL LECTOR EN LA PÁGINA (SHOWCASE)
   ========================================================================== */
.reader-showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 50px;
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4);
}

.reader-showcase-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 20px;
}

.reader-showcase-title {
  font-size: 2.1rem;
  margin-bottom: 16px;
}

.reader-showcase-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto 35px auto;
  line-height: 1.7;
}

.reader-features-row {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 35px;
  flex-wrap: wrap;
}

.reader-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-main);
}

.reader-feature-item span {
  color: var(--primary-cyan);
}

/* ==========================================================================
   SECCIÓN SOBRE EL AUTOR
   ========================================================================== */
.author-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 60px;
  align-items: center;
}

.author-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.author-card-box {
  background: linear-gradient(145deg, #151d2c, #0a0e16);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  max-width: 340px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.author-photo-frame {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 9 / 16;
  margin: 0 auto 18px auto;
  padding: 4px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-cyan), var(--accent-amber));
  box-shadow: 0 10px 30px rgba(0, 229, 255, 0.25);
  overflow: hidden;
}

.author-photo-img {
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius-md) - 2px);
  object-fit: cover;
  display: block;
}

.author-name {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.author-tagline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-amber);
  margin-bottom: 18px;
}

.author-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.badge-pill {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.author-bio p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 1.4rem;
}

.author-bio-highlight {
  background: rgba(0, 229, 255, 0.06);
  border-left: 3px solid var(--primary-cyan);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 24px;
}

.author-bio-highlight p {
  margin-bottom: 0;
  color: #e2e8f0;
}

/* ==========================================================================
   OTRAS OBRAS DEL AUTOR (5 LIBROS EXACTOS)
   ========================================================================== */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 26px;
}

.book-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.book-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
}

.book-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-amber);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.book-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.book-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 22px;
  flex-grow: 1;
}

.book-link {
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-cyan);
}

.book-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   SECCIÓN ADQUISICIÓN / AMAZON (DISPONIBLE YA)
   ========================================================================== */
.buy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.buy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.buy-card.featured {
  border-color: var(--primary-cyan);
  box-shadow: 0 0 35px rgba(0, 229, 255, 0.15);
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.05) 0%, var(--bg-card) 100%);
}

.buy-badge-top {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-cyan);
  color: #050810;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.buy-format-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--primary-cyan);
}

.buy-format-title {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.buy-format-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 26px;
  flex-grow: 1;
}

.buy-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  align-self: center;
}

.btn-amazon-cta {
  background: #ff9900;
  color: #111 !important;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-amazon-cta:hover {
  background: #ffac33;
  color: #000 !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 153, 0, 0.35);
}

/* ==========================================================================
   WIDGET FLOTANTE DE AUDIO ENVOLVENTE (963 Hz)
   ========================================================================== */
.ambient-audio-bar {
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 900;
  background: rgba(14, 18, 26, 0.94);
  border: 1px solid rgba(0, 229, 255, 0.35);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 229, 255, 0.2);
  transition: all var(--transition-fast);
}

.ambient-audio-bar:hover {
  border-color: var(--primary-cyan);
}

.ambient-audio-play-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-cyan);
  color: #000;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: bold;
  transition: transform var(--transition-fast);
}

.ambient-audio-play-btn:hover {
  transform: scale(1.1);
}

.ambient-audio-info {
  display: flex;
  flex-direction: column;
}

.ambient-audio-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-bright);
}

.ambient-audio-subtitle {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--primary-cyan);
}

/* Ecualizador animado en la barra de audio */
.audio-visualizer {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 18px;
  width: 20px;
  padding-bottom: 2px;
}
.audio-visualizer span {
  display: block;
  background: var(--primary-cyan);
  width: 3px;
  border-radius: 2px;
  height: 4px;
  transition: height 0.2s ease;
}
.ambient-audio-bar.playing .audio-visualizer span:nth-child(1) {
  animation: soundBarAnim 0.7s ease infinite alternate;
}
.ambient-audio-bar.playing .audio-visualizer span:nth-child(2) {
  animation: soundBarAnim 1.0s ease infinite alternate 0.2s;
}
.ambient-audio-bar.playing .audio-visualizer span:nth-child(3) {
  animation: soundBarAnim 0.8s ease infinite alternate 0.4s;
}
.ambient-audio-bar.playing .audio-visualizer span:nth-child(4) {
  animation: soundBarAnim 0.9s ease infinite alternate 0.1s;
}
@keyframes soundBarAnim {
  0% { height: 4px; }
  100% { height: 18px; }
}

/* Control deslizante de volumen */
.ambient-volume-slider {
  width: 65px;
  height: 4px;
  accent-color: var(--primary-cyan);
  cursor: pointer;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  outline: none;
}

/* Modal de YouTube */
.youtube-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 5, 8, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1050;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.youtube-modal.active {
  display: flex;
}
.youtube-modal-box {
  background: #0d121c;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  max-width: 840px;
  width: 100%;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9), 0 0 30px rgba(0, 229, 255, 0.2);
}
.youtube-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: #080a0f;
  border-bottom: 1px solid var(--border-color);
}
.youtube-modal-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-bright);
  display: flex;
  align-items: center;
  gap: 8px;
}
.youtube-modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.youtube-modal-close-btn:hover {
  color: var(--text-bright);
  background: rgba(255, 255, 255, 0.1);
}
.youtube-modal-iframe-wrap {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  background: #000;
}
.youtube-modal-iframe-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: #040609;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 35px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.footer-brand-desc {
  line-height: 1.7;
  max-width: 380px;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   RESPONSIVIDAD
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-meta {
    justify-content: center;
  }
  .synopsis-grid {
    grid-template-columns: 1fr;
  }
  .author-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .author-visual {
    margin-bottom: 20px;
  }
  .reader-lightbox-body {
    padding: 35px 25px;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #090c12;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-menu.mobile-open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .reader-showcase-card {
    padding: 30px 20px;
  }
  .reader-lightbox-box {
    height: 98vh;
    border-radius: var(--radius-sm);
  }
  .reader-lightbox-header {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px;
  }
  .reader-tabs-group {
    justify-content: center;
  }
  .reader-actions-group {
    justify-content: space-between;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}