.series-nav {
  margin-top: 2rem;
  padding: 1.1rem 1.15rem;
  border-left: 4px solid var(--theme-border);
  border-top: 1px solid var(--theme-border-soft);
  border-bottom: 1px solid var(--theme-border-soft);
  background: var(--theme-surface);
}

.series-nav h2 {
  margin: 0 0 0.8rem;
  font-size: 1rem;
  font-weight: 600;
}

.series-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
}

.series-nav li {
  display: flex;
  align-items: center;
}

.series-nav li span,
.series-nav li a {
  font-size: 0.92rem;
}

.series-nav li.current-series-item span {
  font-weight: 700;
}

.series-nav li.current-series-item span::after {
  content: " ←";
  font-size: 0.8rem;
}

.series-listing {
  list-style: none;
  margin: 0;
  padding: 0;
}

.series-listing li {
  margin-bottom: 0.65rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.series-listing li a {
  font-weight: 600;
}

.series-listing li .date-meta {
  font-size: 0.85rem;
  color: var(--theme-muted);
}

@media (max-width: 600px) {
  .series-nav {
    padding: 0.9rem;
  }
}