/* Seven-library navigation and textbook scaffolds. */

.sidebar-libraries h2 a {
  color: inherit;
  text-decoration: none;
}

.library-source-hubs {
  grid-template-columns: 1fr;
}

.source-portal-grid-seven,
.library-index-grid,
.upstream-library-grid,
.library-contract-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.source-portal-grid-seven .source-portal {
  min-height: 300px;
}

.source-portal-riemannian,
.source-portal-optimization,
.source-portal-transport,
.source-portal-discrete,
.source-portal-mcmc {
  border-top: 4px solid var(--accent);
}

.library-index-hero h1,
.library-book-hero h1,
.library-chapter-hero h1 {
  max-width: 22ch;
}

.library-index-card,
.library-integration-note,
.library-chapter-contract,
.upstream-library-grid article,
.library-attribution {
  min-width: 0;
  padding: clamp(1.25rem, 2.8vw, 1.8rem);
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 14px;
}

.library-index-card {
  display: flex;
  min-height: 300px;
  flex-direction: column;
}

.library-index-card .button {
  align-self: flex-start;
  margin-top: auto;
}

.library-index-card.library-active {
  border-top: 4px solid var(--accent);
}

.library-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.library-meta-row span {
  display: inline-flex;
  gap: 0.4rem;
}

.library-meta-row strong {
  color: var(--ink);
}

.library-status-key {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.library-chapter-list {
  display: grid;
  gap: 0.7rem;
}

.library-chapter-card {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 11px;
}

.library-chapter-card h2 {
  margin: 0.2rem 0 0.45rem;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
}

.library-chapter-card p {
  margin: 0;
}

.library-chapter-number {
  color: var(--accent);
  font: 650 1rem var(--font-code);
}

.library-contract-grid article {
  min-width: 0;
  padding: 1.1rem;
  border: 1px solid var(--line);
  background: var(--surface-2);
  border-radius: 10px;
}

.library-contract-grid article > span {
  color: var(--accent);
  font: 650 0.72rem var(--font-code);
}

.library-contract-grid h3 {
  margin: 0.45rem 0;
}

.library-attribution {
  margin-top: 3rem;
}

.atlas-source-grid-seven {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 760px) {
  .source-portal-grid-seven,
  .library-index-grid,
  .upstream-library-grid,
  .library-contract-grid,
  .atlas-source-grid-seven {
    grid-template-columns: 1fr;
  }

  .source-portal-grid-seven .source-portal,
  .library-index-card {
    min-height: auto;
  }

  .library-chapter-card {
    grid-template-columns: 2.4rem minmax(0, 1fr);
  }
}
.source-fingerprint { overflow-wrap: anywhere; }