/* ═══════════════════════════════════════════════════════════
   NAVBAR v5 — Mode Bar on top, Main Nav below
   ═══════════════════════════════════════════════════════════ */

.site-header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--white);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.07);
}

/* ── BAR 1 (TOP): MODE SWITCHER — Dark slate bar ── */
.mode-bar {
  background: var(--gray-900);
  border-bottom: none;
}
.mode-bar .tab-bar-inner {
  height: 40px;
  justify-content: center;
}
.mode-tabs {
  display: flex;
  gap: 4px;
  background: transparent;
  border-radius: 0;
  padding: 0;
}
.mode-tab {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 28px;
  border: none;
  background: transparent;
  border-radius: 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gray-400);
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
  white-space: nowrap;
  position: relative;
  letter-spacing: 0.02em;
}
.mode-tab:hover {
  color: var(--gray-100);
}
.mode-tab.active {
  color: #fff;
  background: transparent;
  box-shadow: none;
}
.mode-tab.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 8px;
  right: 8px;
  height: 2.5px;
  background: var(--primary);
  border-radius: 2px 2px 0 0;
}
.mode-tab svg {
  opacity: 0.7;
}
.mode-tab.active svg {
  opacity: 1;
  color: var(--primary);
}

/* ── BAR 2 (MAIN): TOPBAR — Brand + Links + Account ── */
.topbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
}
.topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: var(--sp-4);
}

/* Brand */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--gray-900);
  cursor: pointer;
  user-select: none;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}
.navbar-brand span { color: var(--primary); }

/* Section Nav (page links) */
.section-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}
.section-link {
  padding: 7px 16px;
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--gray-500);
  background: transparent;
  border: none;
  transition: all var(--t-fast) var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.section-link:hover {
  color: var(--gray-900);
  background: var(--gray-50);
}
.section-link.active {
  color: var(--primary);
  background: var(--primary-subtle);
  font-weight: 600;
}

/* Account Actions */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}
.topbar-actions .nav-link {
  color: var(--gray-600);
  padding: 7px 14px;
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-weight: 500;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.topbar-actions .nav-link:hover {
  color: var(--gray-900);
  background: var(--gray-50);
}
.topbar-actions .nav-link.active {
  color: var(--primary);
}
.nav-user-name {
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-right: var(--sp-1);
}

/* ── BAR 3: TAB BAR (generic) ── */
.tab-bar {
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.tab-bar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  gap: var(--sp-4);
}

/* Dashboard sub-tabs bar */
.dash-bar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-150);
}

/* Site tabs */
.site-tabs {
  display: flex;
  gap: 0;
}
.site-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  background: transparent;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
  position: relative;
  white-space: nowrap;
  border-radius: var(--r-md);
}
.site-tab:hover { color: var(--gray-700); background: var(--gray-100); }
.site-tab.active {
  color: var(--primary);
  background: var(--primary-subtle);
}

/* Admin tabs */
.admin-tabs {
  display: flex;
  gap: var(--sp-1);
  background: var(--gray-100);
  border-radius: var(--r-md);
  padding: 3px;
}
.admin-tab {
  flex: 1;
  padding: 8px 14px;
  border: none;
  background: transparent;
  border-radius: var(--r-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gray-500);
  transition: all var(--t-fast) var(--ease);
  cursor: pointer;
}
.admin-tab.active { background: var(--white); color: var(--primary); box-shadow: var(--shadow-sm); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .topbar-inner {
    flex-wrap: wrap;
    height: auto;
    padding: var(--sp-3) var(--sp-4);
    gap: var(--sp-2);
  }
  .navbar-brand { order: 1; }
  .topbar-actions { order: 2; margin-left: auto; }
  .section-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--sp-1);
  }
  .section-link { font-size: var(--text-xs); padding: 6px 10px; }
  .mode-bar .tab-bar-inner { height: 36px; }
  .mode-tab { padding: 7px 16px; font-size: var(--text-xs); }
}

@media (max-width: 480px) {
  .nav-user-name { display: none; }
  .section-link { padding: 5px 8px; }
  .site-tab { padding: 6px 10px; font-size: var(--text-xs); }
  .mode-tab { padding: 5px 12px; }
}