/**
 * Settings hub — left rail + main column; panels keep their own card styles (typography, backup, workspaces).
 */

#root main.tc-settings-hub {
  max-width: min(72rem, 100%);
  margin-left: auto;
  margin-right: auto;
}

/* Two-column shell: rail | content */
.tc-settings-hub__layout {
  display: flex;
  align-items: flex-start;
  gap: clamp(1rem, 3vw, 1.75rem);
  width: 100%;
}

.tc-settings-hub__rail {
  flex: 0 0 min(13.5rem, 34vw);
  position: sticky;
  top: 0.65rem;
  z-index: 5;
  padding: 0.75rem 0.65rem 0.85rem;
  border-radius: var(--tc-radius, 12px);
  border: 1px solid color-mix(in srgb, var(--border, rgba(148, 163, 184, 0.2)) 100%, transparent);
  background: linear-gradient(
    165deg,
    color-mix(in srgb, var(--bg-card, #151c24) 96%, #fff 2%) 0%,
    color-mix(in srgb, var(--bg-elevated, #1a222d) 90%, #000 10%) 100%
  );
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.tc-settings-hub__rail-title {
  margin: 0 0 0.5rem;
  padding: 0 0.35rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted, #94a3b8);
}

.tc-settings-hub__intro {
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
}

/* Vertical section links */
.tc-settings-hub__nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.tc-settings-hub__link {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.45rem 0.55rem;
  border-radius: var(--tc-radius-sm, 8px);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.3;
  text-align: left;
  text-decoration: none !important;
  color: var(--text, #e2e8f0) !important;
  border: 1px solid transparent;
  background: transparent;
  transition:
    border-color 0.15s ease,
    background 0.15s ease;
}

.tc-settings-hub__link:hover {
  border-color: color-mix(in srgb, var(--border, rgba(148, 163, 184, 0.25)) 100%, transparent);
  background: color-mix(in srgb, var(--accent, #22c55e) 10%, transparent);
}

.tc-settings-hub__content {
  flex: 1;
  min-width: 0;
}

/* Scroll targets sit below sticky app chrome + rail */
#tc-typography-panel,
#tc-billing-ui,
#workspaces,
#tc-full-backup-ui {
  scroll-margin-top: 3.25rem;
}

@media (max-width: 639.98px) {
  #tc-typography-panel,
  #tc-billing-ui,
  #workspaces,
  #tc-full-backup-ui {
    scroll-margin-top: 4rem;
  }
}

@media (max-width: 767.98px) {
  .tc-settings-hub__layout {
    flex-direction: column;
  }

  .tc-settings-hub__rail {
    flex: none;
    width: 100%;
    position: static;
    top: auto;
  }

  .tc-settings-hub__nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
  }

  .tc-settings-hub__link {
    width: auto;
    flex: 1 1 auto;
    min-width: calc(50% - 0.25rem);
    justify-content: center;
    text-align: center;
    font-size: 0.78rem;
    padding: 0.4rem 0.5rem;
  }
}

/* Breathing room between stacked panels */
#root main.tc-settings-hub .tc-typography-panel {
  margin-bottom: 1.25rem;
}

#root main.tc-settings-hub .tc-backup-panel {
  margin-bottom: 1.25rem;
}

#root main.tc-settings-hub .tc-ws-admin {
  margin-bottom: 1.25rem;
}

/* Fallback two-line labels if cloned nav row has no span pair (injected app sidebar) */
.tc-settings-sidebar-shell__title {
  display: block;
  font-weight: 600;
  color: var(--text, #f1f5f9);
  line-height: 1.25;
}

.tc-settings-sidebar-shell__sub {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.75rem;
  line-height: 1.3;
  font-weight: 450;
  color: var(--text-muted, #94a3b8);
}