.library-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .65rem;
  margin: 1rem 0;
}

.library-stats a {
  display: flex;
  flex-direction: column;
  padding: .85rem 1rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
}

.library-stats strong {
  font-size: 1.6rem;
  color: var(--aqua-dark);
}

.library-stats span {
  font-size: .78rem;
  color: var(--muted);
}

.source-section-title {
  margin-top: 2.5rem;
}

.topic-section li a {
  display: block;
  font-weight: 700;
  color: var(--aqua-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

@media (max-width: 760px) {
  .library-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}