/* Writing library index (/writing/). Dark theme, consistent with article.css. */
.library-hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 9rem 2.5rem 2rem;
  text-align: center;
}
.library-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.12;
  color: var(--star);
  margin: 0.5rem 0 1rem;
}
.library-sub {
  font-size: 1.1rem;
  color: var(--star-muted);
  line-height: 1.7;
}
.library {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem 2.5rem 5rem;
}

/* ---- Library switcher (three libraries) ---- */
.lib-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}
.lib-tab {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.9rem 1.1rem;
  background: var(--abyss-light);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  transition: border-color 0.2s, background 0.2s;
}
.lib-tab:hover { border-color: var(--dune); }
.lib-tab.is-active {
  border-color: var(--dune);
  background: rgba(196, 135, 77, 0.10);
}
.lib-tab-label { font-weight: 600; color: var(--star); font-size: 0.98rem; }
.lib-tab-meta { font-size: 0.78rem; color: var(--star-dim); }

@media (max-width: 640px) {
  .lib-switch { grid-template-columns: 1fr; }
}
.cluster { margin-bottom: 3.5rem; }
.cluster-title {
  font-family: var(--serif);
  font-size: 1.7rem;
  color: var(--star);
  margin-bottom: 0.4rem;
}
.cluster-blurb {
  font-size: 0.98rem;
  color: var(--star-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  max-width: 640px;
}
.cluster .writing-list { display: grid; gap: 0.5rem; }
.cluster .writing-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 0.25rem 1rem;
  padding: 1.1rem 1.3rem;
  background: var(--abyss-light);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  transition: border-color 0.2s, transform 0.2s;
}
.cluster .writing-item:hover { border-color: var(--dune); transform: translateY(-2px); }
.cluster .writing-title {
  font-weight: 600;
  color: var(--star);
  font-size: 1.05rem;
}
.cluster .writing-desc {
  grid-column: 1 / -1;
  font-size: 0.9rem;
  color: var(--star-muted);
  line-height: 1.55;
}
.cluster .writing-arrow { color: var(--dune); font-size: 1.1rem; }
.cluster .writing-meta {
  grid-column: 1 / -1;
  font-size: 0.78rem;
  color: var(--star-dim);
  letter-spacing: 0.02em;
}
.library-note {
  font-size: 0.9rem;
  color: var(--star-dim);
  border-left: 3px solid var(--dune);
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 0 0 2.5rem;
}
.library-more {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--star-muted);
}
.library-more a { color: var(--dune); }

@media (max-width: 768px) {
  .library-hero { padding: 7rem 1.5rem 1.5rem; }
  .library { padding: 1.5rem 1.5rem 3rem; }
}