.highlights-page .highlights-shell {
  padding: clamp(1rem, 4vw, 2rem);
}

.brand-link:hover {
  text-decoration: none;
}

.library-intro {
  display: grid;
  gap: 0.75rem;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.library-intro h1 {
  margin: 0;
  font-family: var(--font-family-display);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: var(--font-weight-normal);
  line-height: 1;
  letter-spacing: -0.04em;
}

.library-stats,
.search-status {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.library-tools {
  position: sticky;
  z-index: 2;
  top: 0;
  margin: 0 calc(-1 * clamp(1rem, 4vw, 2rem));
  padding: var(--space-sm) clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.library-tools label {
  margin-bottom: 0.35rem;
  color: var(--color-text);
  font-size: 0.8rem;
  font-weight: var(--font-weight-bold);
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xs);
}

.search-row > * {
  min-height: 44px;
  margin: 0;
}

.book-list {
  display: grid;
  gap: 0.65rem;
  margin-top: var(--space-md);
}

.book-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-background);
}

.book-card summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-sm);
  min-height: 64px;
  padding: 0.85rem var(--space-sm);
  cursor: pointer;
  list-style: none;
}

.book-card summary::-webkit-details-marker {
  display: none;
}

.book-card summary:hover,
.book-card summary:focus-visible {
  background: color-mix(in oklch, var(--color-accent) 8%, transparent);
}

.book-card[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.book-identity {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
}

.book-identity strong {
  color: var(--color-text);
  font-size: 0.98rem;
  line-height: 1.35;
}

.book-identity span {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.highlight-count {
  display: inline-grid;
  min-width: 2rem;
  height: 2rem;
  place-items: center;
  padding-inline: 0.45rem;
  border-radius: 999px;
  color: var(--color-background);
  background: var(--color-accent-dim);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
}

.book-highlights {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-sm);
}

.highlight-card {
  --highlight-color: #eab308;
  margin: 0;
  padding: 0.9rem var(--space-sm);
  border: 0;
  border-left: 3px solid var(--highlight-color);
  border-radius: 0 8px 8px 0;
  background: var(--color-surface);
}

.highlight-blue { --highlight-color: #3b82f6; }
.highlight-pink { --highlight-color: #ec4899; }
.highlight-orange { --highlight-color: #f97316; }

.highlight-card p {
  margin: 0;
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.65;
}

.highlight-card footer {
  margin-top: 0.45rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.highlight-card .reader-note {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.empty-book,
.library-error {
  margin: 0;
  color: var(--color-text-muted);
}

@media (max-width: 540px) {
  .search-row {
    grid-template-columns: 1fr;
  }

  .search-row button {
    width: 100%;
  }

  .book-card summary {
    padding-inline: 0.8rem;
  }

  .book-highlights {
    padding: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-card summary {
    scroll-behavior: auto;
  }
}