/* Catalogue page: cover preview, on-demand PDF viewer and page thumbnails. */
.cat-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.cat-cover {
  display: block;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 10px 34px rgb(10 37 64 / 18%);
}

.cat-cover img {
  display: block;
  width: 100%;
  height: auto;
}

.cat-intro-text p {
  line-height: 1.95;
  margin-bottom: 14px;
}

.cat-note {
  color: var(--gray-600, #475569);
  font-size: 0.95rem;
}

.cat-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.cat-facts > div {
  background: #fff;
  border: 1px solid var(--gray-200, #e2e8f0);
  border-radius: 12px;
  padding: 10px 16px;
}

.cat-facts dt {
  font-size: 0.8rem;
  color: var(--gray-500, #64748b);
}

.cat-facts dd {
  font-weight: 700;
  margin: 0;
}

.cat-viewer {
  margin: 0 0 18px;
  border: 1px solid var(--gray-200, #e2e8f0);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
}

.cat-viewer[hidden] {
  display: none;
}

.cat-viewer iframe {
  display: block;
  width: 100%;
  height: min(80vh, 760px);
  border: 0;
}

.cat-viewer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 28px;
}

.cat-thumbs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.cat-thumb {
  display: block;
  background: #fff;
  border: 1px solid var(--gray-200, #e2e8f0);
  border-radius: 12px;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
}

.cat-thumb img {
  display: block;
  width: 100%;
  height: auto;
}

.cat-thumb span {
  display: block;
  padding: 8px 12px;
  font-size: 0.88rem;
  font-weight: 600;
}

.cat-thumb:hover,
.cat-thumb:focus-visible {
  border-color: var(--accent, #0e7c9f);
}

@media (width <= 900px) {
  .cat-intro-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cat-thumbs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .cat-viewer-actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}