/* ============================================================
   Series navigation (Business Growth 12-part series)
   Borrows visual language from .breadcrumb-bar (sticky trail) and
   .fd-related-card (link tile) in styles.css, kept as its own small file
   since it's specific to one content series.
   ============================================================ */

.series-nav {
  background: var(--gray-50);
  border-top: 1px solid var(--slate-200);
  border-bottom: 1px solid var(--slate-200);
  padding: var(--space-md) 0;
}

.series-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.series-nav-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy-700);
  text-decoration: none;
  white-space: nowrap;
}

.series-nav-badge:hover {
  color: var(--cyan-500);
}

.series-nav-badge-part {
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--cyan-500);
}

.series-nav-badge-sep {
  color: var(--slate-400);
}

.series-nav-badge-series {
  color: var(--navy-900);
}

.series-nav-links {
  display: flex;
  align-items: stretch;
  gap: var(--space-sm);
  flex: 1;
  justify-content: flex-end;
  min-width: 0;
}

.series-nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  max-width: 260px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.series-nav-link:not(.series-nav-link-disabled):hover {
  border-color: var(--cyan-500);
  background: white;
}

.series-nav-prev {
  padding-left: 0.5rem;
}

.series-nav-next {
  padding-right: 0.5rem;
  text-align: right;
}

.series-nav-arrow {
  flex-shrink: 0;
  color: var(--slate-500);
}

.series-nav-link-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.series-nav-link-text-right {
  align-items: flex-end;
  text-align: right;
}

.series-nav-link-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--slate-500);
}

.series-nav-link-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--navy-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}

.series-nav-link-disabled {
  opacity: 0.5;
}

@media (max-width: 640px) {
  .series-nav-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .series-nav-links {
    justify-content: space-between;
  }

  .series-nav-link {
    max-width: 48%;
  }

  .series-nav-link-title {
    max-width: 140px;
  }
}