/* ==========================================================================
   catalog.css — Sidebar + Book layout (T3/T4)
   Source : new-template/evangile-selon-pilate.html
   Dépend de : tokens.css (HSL components pour hsla)
   ========================================================================== */

.book-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 4rem;
  padding: 3rem 0 5rem;
}

.sidebar {
  position: sticky;
  top: 88px;
  align-self: start;
}

.sidebar h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
}

.sidebar-cat button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  font-family: var(--font-body);
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  border-radius: 2px;
  transition: 0.3s;
}

.sidebar-cat button:hover,
.sidebar-cat button.active {
  color: var(--primary);
  background: hsla(var(--ph), var(--ps), var(--pl), 0.1);
}

.sidebar-cat button .arrow {
  transition: transform 0.3s;
  font-size: 0.7rem;
}

.sidebar-cat button.open .arrow {
  transform: rotate(180deg);
}

.sidebar-books {
  display: none;
  margin-left: 1rem;
  border-left: 1px solid var(--border);
  padding: 0.25rem 0;
}

.sidebar-books.show {
  display: block;
}

.sidebar-books a,
.sidebar-books span {
  display: block;
  padding: 0.3rem 1rem;
  font-size: 0.75rem;
  color: var(--muted);
  transition: color 0.2s;
}

.sidebar-books a:hover,
.sidebar-books a.active {
  color: var(--primary);
  font-weight: 600;
}

.sidebar-books span.sidebar-link--unavailable {
  opacity: 0.4;
  cursor: not-allowed;
}

.book-header {
  display: flex;
  gap: 2.5rem;
  margin-bottom: 4rem;
}

.book-cover {
  flex-shrink: 0;
  width: 240px;
}

.book-cover img {
  width: 100%;
  box-shadow: 0 20px 60px -15px var(--shadow-lg);
  border-radius: 2px;
  transition: transform 0.5s;
}

.book-cover img:hover {
  transform: scale(1.02);
}

.book-info {
  flex: 1;
}

.book-info h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.book-info .subtitle {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.book-info blockquote {
  border-left: 2px solid hsla(var(--ph), var(--ps), var(--pl), 0.4);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.book-info blockquote p {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-style: italic;
  color: hsla(var(--fgh), var(--fgs), var(--fgl), 0.8);
  line-height: 1.7;
}

.book-info .desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.8;
}

.book-info .desc a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.book-info .desc p + p {
  margin-top: 1rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-body);
  border: none;
  cursor: pointer;
  transition: 0.3s;
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-fg);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-outline {
  background: none;
  border: 1px solid hsla(var(--fgh), var(--fgs), var(--fgl), 0.2);
  color: var(--fg);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.section {
  margin-bottom: 2rem;
}

.section .desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.8;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.section-title h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  white-space: nowrap;
}

.section-title .line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-title--centered {
  justify-content: center;
  text-align: center;
}

.section-title .tag {
  color: var(--primary);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

.catalog-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 1.5rem;
  transition: border-color 0.3s;
  text-decoration: none;
}

.catalog-card:hover {
  border-color: hsla(var(--ph), var(--ps), var(--pl), 0.4);
}

.catalog-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.catalog-card .cat-nomenclature {
  font-size: 0.7rem;
  color: var(--primary);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.catalog-card .cat-subtitle {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.catalog-card .cat-cover {
  display: block;
  margin: -1.5rem -1.5rem 1rem -1.5rem;
  overflow: hidden;
  border-radius: 2px 2px 0 0;
}

.catalog-card .cat-cover img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
}

.catalog-card--unavailable {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.meta-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.meta-list dt {
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 1rem;
}

.meta-list dt:first-child {
  margin-top: 0;
}

.meta-list dd {
  font-size: 0.85rem;
  color: var(--fg);
  margin: 0.2rem 0 0 0;
}

.filter-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.filter-group label {
  display: block;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.filter-group select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  font-family: var(--font-body);
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  appearance: auto;
}

.filter-reset {
  font-size: 0.75rem;
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.filter-reset:hover {
  opacity: 0.8;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--muted);
  font-style: italic;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  transition: color 0.3s;
}

.back-link:hover {
  color: var(--primary);
}

.catalog-group {
  margin-bottom: 3rem;
}

.catalog-group h3 {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

@media (max-width: 1024px) {
  .book-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .book-header {
    flex-direction: column;
  }
  .book-cover {
    width: 180px;
  }
  .catalog-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}