/* 1) Container helper */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* 2) Page header */
.catalog-header {
  background-color: var(--color-surface);
  padding: var(--space-xxl) 0 var(--space-lg);
  text-align: center;
}
.catalog-header h1 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}
.catalog-header p {
  color: var(--color-text);
  font-size: 1.125rem;
  margin: 0;
}

/* 3) Section titles */
.section-title {
  font-family: var(--font-serif);
  color: var(--color-primary);
  font-size: 1.5rem;
  margin: var(--space-lg) 0 var(--space-md);
}

/* Divider */
.divider {
  border: none;
  border-top: 1px solid rgba(0,0,0,0.05);
  margin: var(--space-lg) 0;
}

/* 4) Book grid */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xxl);
}

/* 5) Book card */
.book-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  transition:
    transform var(--transition-medium),
    box-shadow var(--transition-medium);
  position: relative;
}
.book-card:hover,
.book-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow);
}

/* 6) Featured badge */
.book-featured-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background-color: var(--color-accent);
  color: var(--color-surface);
  padding: 0 var(--space-xs);
  border-radius: var(--border-radius-lg);
  font-size: 0.75rem;
  font-weight: 600;
}

/* 7) Cover with consistent aspect ratio */
.book-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 2/3;        /* keep all book covers same shape */
  overflow: hidden;
}
.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}
.book-cover:hover img {
  transform: scale(1.05);
}

/* 8) Placeholder for initials */
.book-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-muted);
  color: var(--color-surface);
  font-size: 2rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
}

/* 9) Metadata block */
.book-meta {
  padding: var(--space-md);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.book-meta h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.125rem;
  color: var(--color-primary);
}
.book-meta .author {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: var(--space-xs);
}
.book-meta .category {
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

/* 10) Responsive tweaks */
@media (max-width: 768px) {
  .catalog-header h1 {
    font-size: 2rem;
  }
  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

/* === NEW: Collections grid & cards (match the book cards) === */
.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xxl);
}

.collection-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  text-decoration: none;
  transition:
    transform var(--transition-medium),
    box-shadow var(--transition-medium);
}
.collection-card:hover,
.collection-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow);
}

/* Force all collection covers to the same shape */
.collection-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 2/3;   /* same as books */
  overflow: hidden;
  background: var(--color-muted);
}
.collection-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;   /* crop to fill without distortion */
  display: block;
}
.collection-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-surface);
}

/* Collection text */
.collection-meta {
  padding: var(--space-md);
}
.collection-name {
  margin: 0 0 var(--space-xxs);
  font-size: 1.125rem;
  color: var(--color-primary);
}
.collection-count {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Smaller grids on phones */
@media (max-width: 768px) {
  .collections-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}