/* catalog.css — browse page and book detail page styles
 * Owns: .catalog-*, .book-grid, .book-card, .detail-*, .genre-filter-bar
 * Does NOT own: landing page / theme variables (see theme.css) */

/* ─── SHARED HEADER ─────────────────────────────────────────────── */
.catalog-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.08);
  padding: 1.1rem 3rem;
}

.catalog-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.catalog-nav .logo {
  text-decoration: none;
}

.nav-divider {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.nav-current {
  font-size: 0.9rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 300px;
}

.nav-back {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-back:hover {
  color: var(--gold);
}

/* ─── CATALOG BROWSE ─────────────────────────────────────────────── */
.catalog-main {
  min-height: 100vh;
  background: var(--bg-deep);
  padding: 4rem 3rem 8rem;
}

.catalog-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.catalog-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 3rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.catalog-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  color: var(--cream);
  line-height: 1;
}

.catalog-count {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ─── GENRE FILTER BAR ───────────────────────────────────────────── */
.genre-filter-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.genre-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 2px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  text-decoration: none;
  background: var(--bg-card);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.genre-pill:hover {
  color: var(--cream);
  border-color: rgba(255,255,255,0.2);
}

.genre-pill.active {
  color: var(--cream);
  background: var(--bg-elevated);
  border-color: var(--pill-accent, var(--gold));
  color: var(--pill-accent, var(--gold));
}

.pill-icon {
  font-size: 0.75rem;
  opacity: 0.8;
}

/* ─── BOOK GRID ──────────────────────────────────────────────────── */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.book-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--card-accent, var(--gold));
  box-shadow: 0 16px 40px rgba(0,0,0,0.4), 0 0 0 1px var(--card-accent, var(--gold)) inset;
}

/* Abstract generated cover */
.book-card-cover {
  aspect-ratio: 2/3;
  max-height: 260px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 2px solid;
}

.cover-symbol {
  font-size: 2.5rem;
  opacity: 0.7;
  margin-bottom: 1.5rem;
  z-index: 1;
}

.cover-lines {
  position: absolute;
  bottom: 3.5rem;
  left: 1.5rem;
  right: 1.5rem;
}

.cover-line {
  height: 1px;
  margin-bottom: 5px;
}

.cover-title-area {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 1rem;
  background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
}

.cover-title-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: rgba(240, 230, 211, 0.7);
  letter-spacing: 0.04em;
  line-height: 1.3;
}

/* Card text area */
.book-card-meta {
  padding: 1.4rem 1.4rem 1.6rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.book-genre-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.book-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.book-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.book-pages {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.book-read-link {
  font-size: 0.8rem;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: letter-spacing 0.2s ease;
}

.book-card:hover .book-read-link {
  letter-spacing: 0.15em;
}

.catalog-empty {
  padding: 6rem 0;
  text-align: center;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
}

/* ─── BOOK DETAIL ────────────────────────────────────────────────── */
.detail-main {
  min-height: 100vh;
  background: var(--bg-deep);
}

.detail-hero {
  padding: 5rem 3rem;
  position: relative;
  overflow: hidden;
}

.detail-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--bg-deep));
  pointer-events: none;
}

.detail-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 4rem;
  align-items: start;
}

/* Abstract detail cover (taller) */
.detail-cover {
  aspect-ratio: 2/3;
  border: 2px solid;
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}

.detail-cover-symbol {
  font-size: 3.5rem;
  opacity: 0.6;
  margin-bottom: 2rem;
  z-index: 1;
}

.detail-cover-lines {
  position: absolute;
  bottom: 3.5rem;
  left: 1.5rem;
  right: 1.5rem;
}

.detail-cover-title {
  position: absolute;
  bottom: 0.75rem;
  left: 1rem;
  right: 1rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  color: rgba(240, 230, 211, 0.6);
  letter-spacing: 0.04em;
  line-height: 1.3;
}

/* Info panel */
.detail-info {
  padding-top: 1rem;
}

.detail-genre-tag {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.detail-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  color: var(--cream);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.detail-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 560px;
  margin-bottom: 2.5rem;
  font-style: italic;
}

.detail-stats {
  display: flex;
  gap: 3rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cream);
}

/* ─── DETAIL CONTENT ─────────────────────────────────────────────── */
.detail-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 3rem 8rem;
}

.detail-section {
  margin-bottom: 4rem;
}

.section-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: 2rem;
}

.synopsis-text p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 1.25rem;
  max-width: 680px;
}

.synopsis-text p:last-child {
  margin-bottom: 0;
}

.detail-divider {
  height: 1px;
  margin: 3rem 0;
  opacity: 0.4;
}

.sample-chapter {
  max-width: 680px;
}

.chapter-heading {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.sample-chapter p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 1.4rem;
}

.sample-chapter p:last-child {
  margin-bottom: 0;
}

.detail-back-row {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.detail-back-link {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: opacity 0.2s ease;
}

.detail-back-link:hover {
  opacity: 0.7;
}

.detail-back-link-alt {
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.detail-back-link-alt:hover {
  color: var(--gold);
}

/* ─── SHARED FOOTER ──────────────────────────────────────────────── */
.catalog-footer {
  padding: 3rem;
  border-top: 1px solid rgba(255,255,255,0.04);
  text-align: center;
  background: var(--bg-section);
}

.catalog-footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.catalog-footer .footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 0.4rem;
}

.catalog-footer .footer-brand span {
  color: var(--gold);
  font-style: italic;
  font-weight: 400;
}

.catalog-footer .footer-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ─── RESPONSIVE ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .catalog-header { padding: 1rem 1.5rem; }
  .catalog-main { padding: 3rem 1.5rem 6rem; }

  .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.25rem;
  }

  .detail-hero { padding: 3rem 1.5rem; }
  .detail-hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .detail-cover {
    width: 180px;
    margin: 0 auto;
  }
  .detail-stats { gap: 2rem; }
  .detail-content { padding: 0 1.5rem 5rem; }
  .catalog-footer { padding: 2rem 1.5rem; }
}

@media (max-width: 480px) {
  .book-grid { grid-template-columns: 1fr; }
  .genre-filter-bar { gap: 0.35rem; }
  .genre-pill { padding: 0.4rem 0.75rem; font-size: 0.75rem; }
  .catalog-nav .nav-current { display: none; }
  .detail-stats { flex-wrap: wrap; gap: 1.5rem; }
}