/* =============================================================================
   Catalyst Elements — Books-specific Styles
   ============================================================================= */

/* --- Filter Bar --- */
.filter-bar {
  background: var(--ce-white);
  border: 1px solid rgba(74,85,104,0.15);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.filter-bar__group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.filter-bar__label {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  color: var(--ce-neutral);
  white-space: nowrap;
}
.filter-bar__select {
  appearance: none;
  -webkit-appearance: none;
  padding: 8px 32px 8px 12px;
  border: 1px solid rgba(74,85,104,0.3);
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--ce-anchor);
  background: var(--ce-white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234A5568' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 10px center;
  cursor: pointer;
  min-height: 40px;
  transition: border-color 0.15s;
}
.filter-bar__select:focus {
  outline: none;
  border-color: var(--ce-comm-teal);
}
.filter-bar__select--active {
  border-color: var(--ce-comm-teal);
  background-color: rgba(5,142,217,0.05);
}

/* Search input */
.filter-bar__search-wrap {
  flex: 1;
  min-width: 200px;
  position: relative;
}
.filter-bar__search {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 1px solid rgba(74,85,104,0.3);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ce-anchor);
  background: var(--ce-white);
  min-height: 40px;
}
.filter-bar__search:focus {
  outline: none;
  border-color: var(--ce-comm-teal);
}
.filter-bar__search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ce-neutral);
  pointer-events: none;
}
.filter-bar__count {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--ce-neutral);
  margin-left: auto;
  white-space: nowrap;
}

/* --- Book Page Layout --- */
.book-page__hero {
  background: var(--ce-white);
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid rgba(74,85,104,0.12);
}
.book-page__hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}
.book-page__cover-wrap {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}
.book-page__cover {
  width: 100%;
  aspect-ratio: 5/7;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: 0 8px 32px rgba(45,49,66,0.15);
}
.book-page__cover-placeholder {
  width: 100%;
  aspect-ratio: 5/7;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--ce-action) 0%, #7A5E20 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  box-shadow: 0 8px 32px rgba(45,49,66,0.15);
}
.book-page__cover-placeholder-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: var(--ce-anchor);
  text-align: center;
  line-height: 1.3;
}
.book-page__meta { display: flex; flex-direction: column; gap: var(--space-md); }
.book-page__title {
  font-size: clamp(22px, 4vw, 36px);
  font-weight: 700;
  color: var(--ce-anchor);
  line-height: 1.2;
  margin-bottom: 0;
}
.book-page__subtitle {
  font-size: 18px;
  color: var(--ce-neutral);
  margin-bottom: 0;
}
.book-page__author-line {
  font-size: 16px;
  color: var(--ce-neutral);
}
.book-page__author-line a { color: var(--ce-comm-teal); }

.book-page__ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-sm);
}
.book-page__ctas .btn { text-align: center; justify-content: center; }
.book-page__delivery-note {
  font-size: 13px;
  color: var(--ce-neutral);
  text-align: center;
}

/* --- What's Inside --- */
.whats-inside {
  padding: var(--space-2xl) 0;
  background: var(--ce-comm-frost);
}
.whats-inside__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}
.whats-inside__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: 16px;
  color: var(--ce-anchor);
}
.whats-inside__check {
  color: var(--ce-feedback-success);
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* --- Related Books --- */
.related-books {
  padding: var(--space-2xl) 0;
  background: var(--ce-comm-frost);
}

/* --- Author mini-profile on book page --- */
.author-mini {
  background: var(--ce-comm-frost);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.author-mini__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ce-action) 0%, #7A5E20 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.author-mini__avatar-initials {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 22px;
  color: var(--ce-anchor);
}
.author-mini__info h4 { margin-bottom: var(--space-xs); }
.author-mini__info p  { margin-bottom: var(--space-sm); }

/* --- Catalog empty state --- */
.catalog-empty {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--ce-neutral);
}
.catalog-empty h3 { color: var(--ce-anchor); margin-bottom: var(--space-sm); }

/* Responsive book page */
@media (max-width: 768px) {
  .book-page__hero-inner {
    grid-template-columns: 1fr;
  }
  .book-page__cover-wrap {
    position: static;
    max-width: 280px;
    margin: 0 auto;
  }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-bar__search-wrap { min-width: unset; }
  .filter-bar__count { margin-left: 0; }
}