/* Tier 2 secondary navigation band — matches tier 1 visual plane */
.tier2-nav {
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-color);
  height: var(--tier2-height);
  padding: 0 1.5rem;
  z-index: 100;
}

.tier2-container {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 2rem;
}

.tier2-tab {
  padding: 0 0.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  font-size: var(--sidebar-font-size);
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}

[data-theme="dark"] .tier2-tab {
  color: var(--text-color);
}

.tier2-tab:hover {
  color: var(--text-color);
  text-decoration: none;
}

.tier2-tab .text {
  padding: 0.25rem 0.5rem;
}

.tier2-tab .text:hover {
  color: var(--text-color);
  background-color: var(--border-color);
  border-radius: 6px;
  transition: color 0.2s, background-color 0.2s;
}

.tier2-tab.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--union-color-dark);
}