/* ==========================================================================
   Fijate Tools - Ficha y Escáner de Libros por ISBN
   Estilos prémium, diseño responsive, temas claro/oscuro y componentes 3D
   ========================================================================== */

:root {
  --font-main: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-serif: 'Literata', 'Merriweather', Georgia, serif;

  /* Colores de tema oscuro por defecto */
  --bg-body: #080c14;
  --bg-surface: #0e1626;
  --bg-card: #131d31;
  --bg-card-hover: #182640;
  --bg-glass: rgba(19, 29, 49, 0.75);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-focus: rgba(56, 189, 248, 0.5);
  --border-color-hover: rgba(255, 255, 255, 0.16);

  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --accent-cyan: #38bdf8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.25);
  --accent-gold: #fbbf24;
  --accent-gold-glow: rgba(251, 191, 36, 0.2);
  --accent-green: #10b981;
  --accent-orange: #f97316;
  --accent-red: #ef4444;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px var(--accent-cyan-glow);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;

  color-scheme: dark;
}

[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-surface: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --border-color: rgba(15, 23, 42, 0.08);
  --border-color-focus: rgba(2, 132, 199, 0.5);
  --border-color-hover: rgba(15, 23, 42, 0.15);

  --text-main: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.2);
  --accent-gold: #d97706;
  --accent-gold-glow: rgba(217, 119, 6, 0.15);
  --accent-green: #059669;
  --accent-orange: #ea580c;
  --accent-red: #dc2626;

  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px var(--accent-cyan-glow);

  color-scheme: light;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Tipografía de select */
select option, .form-select option, .form-select-scanner option {
  background-color: var(--bg-card);
  color: var(--text-main);
}

/* Contenedor principal con sidebar */
.main-wrapper {
  flex: 1;
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.tool-with-sidebar {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Sidebar de publicidad */
.tool-ad-sidebar {
  width: 300px;
  flex-shrink: 0;
}

.ad-sidebar-sticky-wrapper {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ad-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-align: center;
}

.ad-banner-card, .ad-sidebar-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ad-sidebar-card {
  min-height: 600px;
}

/* Hero de la herramienta */
.tool-hero {
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-card) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.tool-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
  opacity: 0.4;
  pointer-events: none;
}

.tool-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background-color: var(--accent-cyan-glow);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.tool-hero h2 {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tool-hero p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 800px;
  line-height: 1.55;
}

/* Selector de pestañas */
.books-tabs-nav {
  display: flex;
  gap: 0.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.books-tab-btn {
  flex: 1 1 0%;
  min-width: max-content;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.books-tab-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-card-hover);
}

.books-tab-btn.active {
  background-color: var(--bg-card);
  color: var(--accent-cyan);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.tab-badge-live {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--accent-orange);
  color: #ffffff;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
}

.tab-badge-count {
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--accent-cyan);
  color: #080c14;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
}

/* Pestaña: Buscador */
.books-search-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input-wrapper:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

.search-icon-inside {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 0.75rem;
  color: var(--text-muted);
}

.search-main-input {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  min-height: 42px;
  border: none;
  background: transparent;
  padding: 0.5rem 0.75rem;
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 1rem;
  outline: none;
}

.search-main-input::placeholder {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.btn-clear-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.btn-clear-search:hover {
  color: var(--text-main);
}

.btn-search-action {
  min-height: 40px;
  padding: 0 1.25rem;
  background-color: var(--accent-cyan);
  color: #080c14;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn-search-action:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

/* Filtros rápidos */
.search-filter-chips {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-label, .popular-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.chip-filter {
  min-height: 32px;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chip-filter:hover {
  border-color: var(--border-color-hover);
  color: var(--text-main);
}

.chip-filter.active {
  background-color: var(--accent-cyan);
  color: #080c14;
  border-color: var(--accent-cyan);
  font-weight: 600;
}

/* Tags de populares */
.popular-queries-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.popular-tags-list {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag-quick {
  min-height: 30px;
  padding: 0.2rem 0.65rem;
  font-family: var(--font-main);
  font-size: 0.8rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tag-quick:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Barra de estado */
.search-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.status-count-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.status-query-badge {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  margin-left: 0.5rem;
}

.btn-clean-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.btn-clean-filter:hover {
  color: var(--accent-cyan);
}

/* Spinner */
.books-loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  gap: 1rem;
}

.books-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-msg {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* Cuadrícula de libros */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* Tarjeta de libro */
.book-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.book-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md);
}

.book-card-top {
  display: flex;
  gap: 1rem;
}

/* Portada de miniatura en tarjeta */
.book-card-cover-wrap {
  width: 90px;
  height: 130px;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  position: relative;
  box-shadow: 2px 4px 10px rgba(0, 0, 0, 0.3);
}

.book-card-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-card-cover-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-hover) 100%);
  color: var(--text-muted);
  text-align: center;
  font-size: 0.65rem;
}

.book-card-info {
  flex: 1 1 0%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.book-card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-card-author {
  font-size: 0.86rem;
  color: var(--accent-cyan);
  font-weight: 500;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.meta-pill {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.book-card-desc {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: auto;
}

.book-card-footer {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

.btn-card-action {
  flex: 1 1 0%;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font-main);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-card-primary {
  background-color: var(--accent-cyan);
  color: #080c14;
  border: none;
}

.btn-card-primary:hover {
  opacity: 0.9;
}

.btn-card-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-card-icon:hover {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.btn-card-icon.active {
  color: var(--accent-gold);
  background-color: var(--accent-gold-glow);
  border-color: var(--accent-gold);
}

/* Estado vacío */
.books-empty-state {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
}

.empty-icon-wrap {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.books-empty-state h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--text-main);
}

.books-empty-state p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  max-width: 500px;
}

.btn-primary-action {
  min-height: 42px;
  padding: 0 1.5rem;
  background-color: var(--accent-cyan);
  color: #080c14;
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  margin-top: 0.5rem;
}

/* Pestaña: Escáner */
.scanner-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.scanner-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.scanner-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.scanner-header-info h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.scanner-header-info p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-select-scanner {
  min-height: 40px;
  padding: 0.4rem 0.75rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  outline: none;
  width: 100%;
  max-width: 260px;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

/* Visor de cámara */
.scanner-viewport-wrapper {
  width: 100%;
  height: 380px;
  background-color: #000000;
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}

.scanner-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.4);
}

.scanner-guide-box {
  width: 280px;
  height: 180px;
  position: relative;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.45);
  border-radius: 8px;
}

.laser-beam {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--accent-cyan) 50%, transparent 100%);
  box-shadow: 0 0 10px var(--accent-cyan), 0 0 20px var(--accent-cyan);
  animation: scanLaser 2s ease-in-out infinite alternate;
}

@keyframes scanLaser {
  0% { top: 5%; }
  100% { top: 95%; }
}

.corner {
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: var(--accent-cyan);
  border-style: solid;
}

.corner-tl { top: 0; left: 0; border-width: 3px 0 0 3px; }
.corner-tr { top: 0; right: 0; border-width: 3px 3px 0 0; }
.corner-bl { bottom: 0; left: 0; border-width: 0 0 3px 3px; }
.corner-br { bottom: 0; right: 0; border-width: 0 3px 3px 0; }

.guide-text {
  position: absolute;
  bottom: -30px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.8rem;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

/* Placeholder inactivo */
.scanner-idle-placeholder {
  position: absolute;
  inset: 0;
  background-color: var(--bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.5rem;
  text-align: center;
}

.idle-icon-box {
  width: 68px;
  height: 68px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.scanner-idle-placeholder h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-main);
}

.scanner-idle-placeholder p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  max-width: 400px;
}

.btn-start-camera {
  min-height: 44px;
  padding: 0 1.5rem;
  background-color: var(--accent-cyan);
  color: #080c14;
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

/* Acciones del escáner */
.scanner-action-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-scanner-action {
  flex: 1 1 0%;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-scanner-action:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-color-hover);
}

.btn-upload-image {
  color: var(--accent-cyan);
}

/* Resultado escaneado */
.scanned-result-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-hover) 100%);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-badge-success {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-green);
  font-size: 0.85rem;
  font-weight: 700;
}

.result-isbn-display {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.result-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.result-code-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
}

.btn-search-scanned {
  min-height: 42px;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--accent-cyan);
  color: #080c14;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Consejos */
.scanner-tips-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}

.scanner-tips-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tips-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.tips-list li svg {
  flex-shrink: 0;
  margin-top: 0.2rem;
  color: var(--accent-cyan);
}

/* Pestaña: Mi biblioteca */
.library-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
}

.library-info-stats {
  display: flex;
  gap: 1.5rem;
}

.lib-stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-cyan);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.library-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn-lib-action {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-lib-action:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-color-hover);
}

.btn-danger-soft {
  color: var(--accent-red);
}

.btn-danger-soft:hover {
  border-color: var(--accent-red);
  background-color: rgba(239, 68, 68, 0.1);
}

/* ==========================================================================
   MODAL DE FICHA TÉCNICA
   ========================================================================== */
.books-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  overflow-y: auto;
}

.books-modal-dialog {
  width: 100%;
  max-width: 860px;
  max-height: 90vh;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.books-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  gap: 1rem;
}

.modal-category-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
}

.modal-book-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.modal-book-author {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.btn-modal-close {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-modal-close:hover {
  color: var(--text-main);
  border-color: var(--border-color-hover);
  background-color: var(--bg-card-hover);
}

/* Pestañas del modal */
.modal-tabs-nav {
  display: flex;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1rem;
  overflow-x: auto;
}

.modal-tab-btn {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0 1rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.modal-tab-btn:hover {
  color: var(--text-main);
}

.modal-tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

/* Cuerpo del modal */
.books-modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

/* Subpestaña 1: Ficha */
.modal-ficha-layout {
  display: flex;
  gap: 1.75rem;
}

.modal-cover-side {
  width: 200px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

/* Efecto libro 3D en modal */
.book-3d-wrap {
  position: relative;
  width: 170px;
  height: 245px;
  perspective: 900px;
}

.book-3d-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px 8px 8px 4px;
  box-shadow: -4px 6px 16px rgba(0, 0, 0, 0.4), 0 0 2px rgba(0, 0, 0, 0.2);
  transform: rotateY(-8deg);
  transition: transform var(--transition-normal);
}

.book-3d-wrap:hover .book-3d-cover {
  transform: rotateY(0deg);
}

.btn-toggle-favorite {
  width: 100%;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-toggle-favorite:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.btn-toggle-favorite.active {
  background-color: var(--accent-gold-glow);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.modal-info-side {
  flex: 1 1 0%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.metadata-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.meta-label {
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
}

.meta-val {
  font-size: 0.92rem;
  color: var(--text-main);
  font-weight: 500;
}

.meta-mono {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.subjects-tags-cloud {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 0.35rem;
}

.subject-tag-pill {
  font-size: 0.76rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.modal-description-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
}

.description-heading {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.description-text {
  font-family: var(--font-serif);
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: pre-line;
}

/* Subpestaña 2: Citas */
.citations-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.citations-intro {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.citation-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.citation-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.citation-style-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.btn-copy-citation {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-copy-citation:hover {
  background-color: var(--accent-cyan);
  color: #080c14;
  border-color: var(--accent-cyan);
}

.citation-content {
  font-family: var(--font-serif);
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.5;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
}

.citation-content-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  white-space: pre-wrap;
}

/* Subpestaña 3: Código de barras */
.barcode-generator-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.barcode-intro {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.barcode-preview-box {
  background-color: #ffffff;
  padding: 1.5rem 2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
}

.barcode-preview-box svg {
  max-width: 100%;
  height: auto;
}

.btn-download-svg {
  min-height: 42px;
  padding: 0 1.5rem;
  background-color: var(--accent-cyan);
  color: #080c14;
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

/* Subpestaña 4: Bibliotecas */
.libraries-links-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

.library-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.library-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}

.lib-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.lib-card-text {
  flex: 1 1 0%;
  min-width: 0;
}

.lib-card-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.lib-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.lib-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
}

/* Toast */
.books-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--accent-cyan);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  z-index: 10000;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  font-size: 0.88rem;
  font-weight: 600;
}

.books-toast.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   RESPONSIVE / MÓVIL
   ========================================================================== */
@media (max-width: 992px) {
  .tool-with-sidebar {
    flex-direction: column;
  }

  .tool-ad-sidebar {
    width: 100%;
  }

  .ad-sidebar-sticky-wrapper {
    position: static;
  }

  .ad-sidebar-card {
    min-height: 250px;
  }
}

@media (max-width: 768px) {
  .main-wrapper {
    padding: 1rem 0.75rem 2.5rem;
  }

  .tool-hero h2 {
    font-size: 1.35rem;
  }

  .books-grid {
    grid-template-columns: 1fr;
  }

  .search-input-wrapper {
    flex-direction: column;
    padding: 0.4rem;
  }

  .btn-search-action {
    width: 100%;
    margin-top: 0.4rem;
  }

  .modal-ficha-layout {
    flex-direction: column;
    align-items: center;
  }

  .modal-cover-side {
    width: 100%;
  }

  .metadata-grid {
    grid-template-columns: 1fr;
  }

  .scanner-viewport-wrapper {
    height: 280px;
  }

  .scanner-guide-box {
    width: 220px;
    height: 140px;
  }
}