/* ==========================================================================
   BOOK DETAIL PAGE SPECIFIC STYLES
   ========================================================================== */

.breadcrumb-nav {
  padding: 16px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  color: var(--text-muted);
}

.breadcrumb-list a {
  color: var(--text-secondary);
  font-weight: 500;
}

.breadcrumb-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.breadcrumb-separator {
  color: #CBD5E1;
}

.breadcrumb-active {
  color: var(--text-main);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}

/* Book Main Section */
.book-single-section {
  padding: 40px 0 64px;
}

.book-single-grid {
  display: grid;
  grid-template-columns: 460px 1fr;
  gap: 48px;
  align-items: flex-start;
}

/* Sticky Gallery Column */
.book-gallery-col {
  position: sticky;
  top: 96px;
}

/* 3-Image Interactive Gallery */
.gallery-viewer {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.gallery-stage {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 5.2;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.gallery-featured-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 14px 28px rgba(0,0,0,0.22));
  transition: transform 0.35s ease;
  cursor: zoom-in;
}

.gallery-stage:hover .gallery-featured-img {
  transform: scale(1.04);
}

/* Zoom Hint Badge */
.gallery-zoom-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.74rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 5px;
  pointer-events: none;
}

/* Slide arrows */
.gallery-nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
}

.gallery-nav-arrow:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-50%) scale(1.08);
}

.gallery-nav-prev { left: 14px; }
.gallery-nav-next { right: 14px; }

/* 3 Image Thumbnail Tabs */
.gallery-thumbs-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.gallery-thumb-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.gallery-thumb-card img {
  height: 70px;
  width: auto;
  object-fit: contain;
}

.gallery-thumb-card .thumb-label {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-align: center;
}

.gallery-thumb-card:hover {
  border-color: #CBD5E1;
}

.gallery-thumb-card.active {
  border-color: var(--accent-gold);
  background: var(--surface-warm);
}

.gallery-thumb-card.active .thumb-label {
  color: var(--accent-hover);
}

/* Content Column */
.book-details-col {
  display: flex;
  flex-direction: column;
}

.book-page-badge {
  align-self: flex-start;
  background: rgba(217, 119, 6, 0.12);
  color: var(--accent-hover);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.book-page-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--primary);
  margin-bottom: 6px;
}

.book-page-title-en {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 16px;
}

.book-author-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.book-author-name {
  font-weight: 700;
  color: var(--text-main);
}

/* Price Card in Detail Page */
.book-price-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.price-main-display {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}

.price-current-lg {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
}

.price-mrp-lg {
  font-size: 1.25rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

.price-discount-pill {
  background: var(--danger);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 800;
}

.price-stock-status {
  font-size: 0.9rem;
  color: var(--success);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.price-actions-group {
  display: flex;
  gap: 12px;
}

.btn-buy-wa-lg {
  flex: 1;
  background: linear-gradient(135deg, var(--whatsapp) 0%, var(--whatsapp-dark) 100%);
  color: #FFFFFF;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 16px 24px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  transition: var(--transition);
}

.btn-buy-wa-lg:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.5);
}

/* Delivery Info Banner */
.delivery-features-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background: var(--surface-warm);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 28px;
  text-align: center;
  font-size: 0.82rem;
}

.delivery-feat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-main);
  font-weight: 600;
}

.delivery-feat-item svg {
  color: var(--accent-hover);
}

/* Tabs & Content Sections */
.book-tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
}

.book-tab-btn {
  padding: 12px 20px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-secondary);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.book-tab-btn:hover {
  color: var(--primary);
}

.book-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-pane {
  display: none;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.tab-pane.active {
  display: block;
}

/* Fullscreen Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: 0 0 40px rgba(0,0,0,0.8);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.2);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.lightbox-close:hover {
  background: var(--danger);
}

/* Responsive */
@media (max-width: 992px) {
  .book-single-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .book-gallery-col {
    position: static;
    max-width: 480px;
    margin: 0 auto;
  }
  .book-page-title {
    font-size: 1.8rem;
  }
}