/* CPDSE — PDF preview with enlarge-to-view (_includes/pdf-preview.html)
 * Loaded per page through the `css:` front matter key.
 * A thumbnail on the left, optional summary on the right; the enlarged
 * view is a fixed overlay shown with :target, so it needs no JavaScript. */

/* ── Preview grid ─────────────────────────────────────────────── */
.pdf-preview {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: var(--space-md, 2rem);
  align-items: start;
}
.pdf-preview__figure { margin: 0; }

.pdf-preview__thumb {
  position: relative;
  display: block;
  border: 1px solid var(--card-border, #D9D9D9);
  background: var(--color-soft-white, #F9F9F9);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.pdf-preview__thumb:hover,
.pdf-preview__thumb:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(51, 51, 51, 0.15);
}
.pdf-preview__thumb img {
  display: block;
  width: 100%;
  height: auto;
}
.pdf-preview__hint {
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--color-forest-green, #3C5E3E);
  color: var(--color-antique-gold, #D6C17C);
}
.pdf-preview__caption { margin-top: 1rem; }

.pdf-preview__summary p  { margin: 0 0 0.75rem; line-height: 1.7; }
.pdf-preview__summary ul,
.pdf-preview__summary ol { margin: 0 0 0 1.2rem; padding: 0; line-height: 1.65; }
.pdf-preview__summary li { margin-bottom: 0.6rem; }

/* ── Enlarged view ────────────────────────────────────────────── */
.pdf-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  overflow-y: auto;
  padding: var(--space-md, 2rem) var(--space-sm, 1rem);
  background: rgba(51, 51, 51, 0.92);
}
.pdf-lightbox:target { display: block; }

.pdf-lightbox__backdrop {
  position: fixed;
  inset: 0;
}
.pdf-lightbox__panel {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.pdf-lightbox__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.pdf-lightbox__page {
  display: block;
  background: var(--color-soft-white, #F9F9F9);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}
.pdf-lightbox__page img {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 900px) {
  .pdf-preview { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .pdf-preview__thumb { transition: none; }
  .pdf-preview__thumb:hover,
  .pdf-preview__thumb:focus-visible { transform: none; }
}