/* ============================================
   SkyCetus 2.0 — 星系文献库
   ============================================ */

.archives-hero {
  padding: 9rem 2rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, var(--space-deep), var(--space));
}

.archives-content {
  padding: 3rem var(--container-padding) var(--section-padding);
  background: var(--bg-primary);
}

.archives-container {
  max-width: 800px;
  margin: 0 auto;
}

.archive-section {
  margin-bottom: 4rem;
}

.archive-section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 0.3rem;
}

.archive-section-desc {
  font-size: 0.88rem;
  color: var(--white-40);
  margin-bottom: 2rem;
}

/* Volume Card */
.volume-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.volume-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--white-05);
}

.volume-header h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--white);
}

.chapter-list {
  padding: 0.5rem 0;
}

.chapter-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  color: var(--white-60);
  transition: all var(--t-fast);
  text-decoration: none;
  border-bottom: 1px solid var(--white-05);
}

.chapter-item:last-child { border-bottom: none; }

.chapter-item:hover {
  background: var(--white-05);
  color: var(--white);
}

.chapter-item.locked {
  color: var(--white-30);
}

.chapter-item.locked:hover {
  color: var(--white-40);
}

.lock-icon {
  font-size: 0.8rem;
  color: var(--gold);
}

/* Doc Grid */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.doc-card {
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--t-base);
}

.doc-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.doc-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 1rem;
}

.doc-card h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.doc-card p {
  font-size: 0.82rem;
  color: var(--white-40);
  margin-bottom: 1rem;
}

.doc-link {
  font-size: 0.82rem;
  color: var(--gold);
  transition: color var(--t-fast);
}

.doc-link:hover { color: var(--gold-light); }

@media (max-width: 768px) {
  .doc-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
}