/* ============================================================
   LIBRO.CSS — Página de libro individual
   ============================================================ */

.book-detail {
  padding-block: var(--space-10) var(--space-20);
}

.book-detail__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

.book-detail__cover-wrapper {
  position: sticky;
  top: 90px;
}

.book-detail__cover-img {
  width: 100%;
  max-width: 340px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background-color: var(--color-bg-soft);
}

.book-detail__cover-placeholder {
  width: 100%;
  max-width: 340px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 4;
  background: linear-gradient(135deg, var(--color-bg-soft), var(--color-primary-soft));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.book-detail__gallery {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
  overflow-x: auto;
  padding-bottom: var(--space-2);
}

.book-detail__gallery-thumb {
  width: 72px;
  height: 96px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition-base);
}

.book-detail__gallery-thumb:hover,
.book-detail__gallery-thumb.active {
  border-color: var(--color-primary);
}

.book-detail__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.book-detail__title {
  margin-bottom: var(--space-2);
}

.book-detail__author {
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.book-detail__editorial {
  font-size: var(--text-base);
  color: var(--color-text);
  font-style: italic;
  line-height: 1.7;
  padding: var(--space-6);
  border-left: 3px solid var(--color-primary);
  background-color: var(--color-bg-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-block: var(--space-6);
}

.book-detail__section-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.book-detail__competencias {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.book-detail__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.book-detail__actions .btn {
  width: 100%;
}

.book-detail__related {
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .book-detail__actions {
    flex-direction: row;
  }

  .book-detail__actions .btn {
    width: auto;
  }
}

@media (min-width: 1024px) {
  .book-detail__layout {
    grid-template-columns: 340px 1fr;
    align-items: start;
  }
}