/* ========== Manrope Font ========== */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600;700;800&display=swap');

/* ========== Reset & Base ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Brand Colours (theme-invariant) */
  --ce-green: #A6DE95;
  --ce-teal: #629D8F;
  --ce-blue: #5CA3C7;
  --ce-deep-blue: #294C60;
  --ce-navy: #0E2833;
  --ce-light-green: #C3F8D1;
  --ce-blue-20: #DEEDF4;
  --ce-green-20: #EEF9ED;
  --ce-teal-20: #E0EBE9;

  /* Chart Sequence (theme-invariant) */
  --ce-chart-1: #A6DE95;
  --ce-chart-2: #629D8F;
  --ce-chart-3: #5CA3C7;
  --ce-chart-4: #294C60;
  --ce-chart-5: #C3F8D1;
  --ce-chart-6: #0E2833;

  /* Semantic — mapped from brand */
  --primary: #5CA3C7;
  --primary-dark: #294C60;
  --primary-light: #DEEDF4;
  --success: #629D8F;
  --success-light: #C3F8D1;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #294C60;
  --gray-800: #294C60;
  --gray-900: #0E2833;
  --radius: 8px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --transition: 0.2s ease;

  /* ===== Semantic Theme Variables (Light Mode Default) ===== */
  --bg-primary: #FFFFFF;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --surface-primary: #FFFFFF;
  --surface-hover: #f9fafb;
  --text-primary: #294C60;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --text-heading: #294C60;
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  --input-bg: #FFFFFF;
  --input-border: #d1d5db;
  --nav-bg: #0E2833;
  --nav-border: rgba(255,255,255,0.1);
  --nav-text: rgba(255,255,255,0.5);
  --nav-item-color: #d1d5db;
  --nav-item-hover: rgba(255,255,255,0.08);
  --nav-item-active: #5CA3C7;
  --topbar-bg: #FFFFFF;
  --topbar-border: rgba(41,76,96,0.12);
  --thead-bg: #DEEDF4;
  --thead-color: #294C60;
  --overlay-bg: rgba(0,0,0,0.5);
  --widget-header-bg: #F0F8FB;
  --badge-admin-bg: #DEEDF4;
  --badge-admin-color: #294C60;
  --badge-staff-bg: #ede9fe;
  --badge-staff-color: #6d28d9;
  --badge-google-bg: #fef3c7;
  --badge-google-color: #92400e;
  color-scheme: light;
}

html {
  font-size: 14px;
}

body {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2 { font-weight: 700; letter-spacing: -0.5px; }
h3, h4 { font-weight: 500; }

/* ========== Layout ========== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--nav-bg);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 20px 16px;
  border-bottom: 1px solid var(--nav-border);
}

.sidebar-logo {
  width: 120px;
  min-width: 75px;
  filter: brightness(0) invert(1);
  display: block;
}

.sidebar-header .subtitle {
  font-size: 0.75rem;
  color: var(--nav-text);
  margin-top: 6px;
  letter-spacing: 0.5px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--nav-item-color);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.9rem;
  margin-bottom: 2px;
}

/* Hide feature-gated nav items by default to prevent FOUC */
.nav-item[data-feature] {
  display: none;
}
.nav-item[data-feature].feature-visible {
  display: flex;
}

/* Loading overlay – shown until permissions are resolved */
.app-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-primary);
  transition: opacity 0.3s ease;
}
.app-loading-overlay.fade-out {
  opacity: 0;
  pointer-events: none;
}
.app-loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: ce-spin 0.7s linear infinite;
}
@keyframes ce-spin {
  to { transform: rotate(360deg); }
}

.nav-item:hover {
  background: var(--nav-item-hover);
  color: #fff;
}

.nav-item.active {
  background: var(--nav-item-active);
  color: #fff;
}

.nav-item .icon {
  width: 20px;
  text-align: center;
  font-size: 1rem;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--nav-border);
  font-size: 0.75rem;
  color: var(--nav-text);
}

/* Main content */
.main-content {
  flex: 1;
  margin-left: 240px;
  min-height: 100vh;
}

/* Auth pages (login/register): full-screen, no sidebar/topbar */
.auth-page {
  background: linear-gradient(135deg, #0E2833 0%, #294C60 100%);
  min-height: 100vh;
}
.auth-page .app-layout {
  min-height: 100vh;
}
.auth-page .main-content {
  margin-left: 0;
  min-height: 100vh;
}
.auth-page .page-content {
  padding: 0;
  min-height: 100vh;
}

.top-bar {
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--topbar-border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-bar .breadcrumb {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.top-bar .breadcrumb a {
  color: var(--gray-500);
  text-decoration: none;
  transition: color var(--transition);
}

.top-bar .breadcrumb a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.top-bar .breadcrumb span {
  color: var(--text-heading);
  font-weight: 600;
}

.page-content {
  padding: 24px;
  max-width: 1200px;
}

/* ========== Cards ========== */
.card {
  background: var(--surface-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

.card + .card {
  margin-top: 16px;
}

/* ========== Tables ========== */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  background: var(--thead-bg);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--thead-color);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

tbody tr:hover {
  background: var(--surface-hover);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-success {
  background: var(--ce-green);
  color: #1a3a2a;
}
.btn-success:hover {
  background: var(--ce-teal);
  color: #fff;
}

.btn-warning {
  background: var(--warning);
  color: #fff;
}
.btn-warning:hover {
  background: #b45309;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover {
  background: #b91c1c;
}

.btn-outline {
  background: var(--surface-primary);
  border-color: var(--border-color);
  color: var(--text-primary);
}
.btn-outline:hover {
  background: var(--surface-hover);
  border-color: var(--gray-400);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ========== Forms ========== */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 4px;
  color: var(--gray-700);
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--input-bg);
  color: var(--text-primary);
}

.form-control:focus {
  outline: none;
  border-color: var(--ce-blue);
  box-shadow: 0 0 0 3px rgba(92,163,199,0.3);
}

select.form-control {
  cursor: pointer;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 2px;
}

/* ========== Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background: var(--ce-light-green);
  color: var(--ce-teal);
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning);
}

.badge-danger {
  background: var(--danger-light);
  color: var(--danger);
}

.badge-info {
  background: var(--ce-blue-20);
  color: var(--ce-blue);
}

/* ========== Stats Cards ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--surface-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--ce-green);
}

.stat-card:nth-child(2) { border-left-color: var(--ce-teal); }
.stat-card:nth-child(3) { border-left-color: var(--ce-blue); }
.stat-card:nth-child(4) { border-left-color: var(--ce-deep-blue); }
.stat-card:nth-child(5) { border-left-color: var(--ce-green); }
.stat-card:nth-child(6) { border-left-color: var(--ce-teal); }

.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-top: 4px;
}

.stat-card .stat-change {
  font-size: 0.8rem;
  margin-top: 4px;
}

/* ========== Toggle Switch ========== */
.toggle {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gray-300);
  border-radius: 22px;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 3px;
  bottom: 3px;
  background: var(--bg-primary);
  border-radius: 50%;
  transition: var(--transition);
}

.toggle input:checked + .toggle-slider {
  background: var(--ce-green);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(18px);
}

/* ========== Tree / Accordion ========== */
.tree-list {
  list-style: none;
}

.tree-site {
  margin-bottom: 4px;
}

.tree-site-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: var(--radius);
  font-weight: 600;
  color: var(--gray-700);
  transition: background var(--transition);
}

.tree-site-header:hover {
  background: var(--gray-100);
}

.tree-site-header .arrow {
  transition: transform var(--transition);
  font-size: 0.7rem;
}

.tree-site.open .tree-site-header .arrow {
  transform: rotate(90deg);
}

.tree-hmi-list {
  list-style: none;
  padding-left: 20px;
  display: none;
}

.tree-site.open .tree-hmi-list {
  display: block;
}

.tree-hmi-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  cursor: pointer;
  border-radius: var(--radius);
  color: var(--gray-600);
  transition: all var(--transition);
  font-size: 0.9rem;
}

.tree-hmi-item:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.tree-hmi-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

/* ========== Tag Detail ========== */
.value-display {
  text-align: center;
  padding: 24px;
}

.value-display .current-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
}

.value-display .value-unit {
  font-size: 1.2rem;
  color: var(--gray-500);
  margin-left: 4px;
}

.value-display .value-time {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.chart-container {
  position: relative;
  height: 300px;
  padding: 10px;
}

/* ========== Modal ========== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--overlay-bg);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--surface-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 560px;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--transition);
}

.modal-overlay.show .modal {
  transform: translateY(0);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--gray-400);
  padding: 4px;
}
.modal-close:hover {
  color: var(--gray-600);
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--surface-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 12px 16px;
  min-width: 280px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s ease;
  color: var(--text-primary);
}

.toast.toast-success {
  border-left: 4px solid var(--success);
}
.toast.toast-error {
  border-left: 4px solid var(--danger);
}
.toast.toast-warning {
  border-left: 4px solid var(--warning);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--gray-400);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.empty-state p {
  font-size: 0.95rem;
}

/* ========== Page Header ========== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.page-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-heading);
}

/* ========== Two Column Layout ========== */
.two-col {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
}

/* ========== Misc ========== */
.tag-link {
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
  font-weight: 500;
}

.tag-link:hover {
  text-decoration: underline;
}

.text-muted {
  color: var(--gray-500);
}

.text-sm {
  font-size: 0.8rem;
}

.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mr-2 { margin-right: 8px; }

.hidden { display: none !important; }

/* ========== Tab Bar ========== */
.tab-bar {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 16px;
  gap: 0;
}

.tab-item {
  padding: 10px 20px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-500);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  user-select: none;
  white-space: nowrap;
}

.tab-item:hover { color: var(--ce-deep-blue); }
.tab-item.active { color: var(--ce-blue); border-bottom-color: var(--ce-blue); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ========== Filter Bar ========== */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-bar .search-input {
  flex: 1;
  min-width: 180px;
  padding: 7px 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  outline: none;
  background: var(--input-bg);
  color: var(--text-primary);
  transition: border-color var(--transition);
}

.filter-bar .search-input:focus { border-color: var(--ce-blue); }

.filter-bar select {
  padding: 7px 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  background: var(--input-bg);
  color: var(--text-primary);
  cursor: pointer;
  outline: none;
}

.filter-bar select:focus { border-color: var(--ce-blue); }

/* ========== Role / Status Badges ========== */
.badge-admin { background: var(--badge-admin-bg); color: var(--badge-admin-color); }
.badge-staff { background: var(--badge-staff-bg); color: var(--badge-staff-color); }
.badge-viewer { background: var(--gray-100); color: var(--gray-600); }
.badge-active { background: var(--success-light); color: var(--success); }
.badge-pending { background: var(--warning-light); color: var(--warning); }
.badge-disabled { background: var(--danger-light); color: var(--danger); }
.badge-google { background: var(--badge-google-bg); color: var(--badge-google-color); }
.badge-local { background: var(--gray-100); color: var(--gray-600); }

/* ========== Checkbox Group ========== */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 300px;
  overflow-y: auto;
  padding: 4px 0;
}

.checkbox-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: background var(--transition);
  cursor: pointer;
}

.checkbox-item:hover { background: var(--gray-50); }

.checkbox-item input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
  cursor: pointer;
  flex-shrink: 0;
}

.checkbox-item .cb-label { font-size: 0.9rem; font-weight: 500; }
.checkbox-item .cb-desc { font-size: 0.78rem; color: var(--gray-500); margin-top: 1px; }

/* ========== HW Group (Tag permissions) ========== */
.hw-group {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
}

.hw-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  font-size: 0.9rem;
}

.hw-group-header:hover { background: var(--gray-100); }

.hw-group-body { padding: 8px; }

.hw-group-body.collapsed { display: none; }

/* ========== Copy Button ========== */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
}

.copy-btn:hover { background: var(--gray-200); }
.copy-btn.copied { background: var(--success-light); border-color: var(--success); color: var(--success); }

/* ========== Info Row (non-editable in modals) ========== */
.info-row {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  background: var(--gray-50);
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 0.85rem;
}

.info-row .info-label {
  width: 100px;
  flex-shrink: 0;
  color: var(--gray-500);
  font-weight: 500;
}

.info-row .info-value { color: var(--gray-800); word-break: break-all; }

/* ========== Quick action links ========== */
.quick-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.quick-actions .qa-link {
  font-size: 0.78rem;
  color: var(--primary);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.quick-actions .qa-link:hover { text-decoration: underline; }

/* ========== Invite result block ========== */
.invite-result {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
}

.invite-result .invite-field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--surface-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.invite-result .invite-field .field-value {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  word-break: break-all;
}

/* ========== Theme Toggle Button ========== */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 4px 8px;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.theme-toggle-btn:hover {
  background: var(--surface-hover);
  border-color: var(--ce-blue);
}

/* ========== Dark Theme ========== */
[data-theme="dark"] {
  /* Semantic overrides */
  --bg-primary: #0E2833;
  --bg-secondary: #0a1e28;
  --bg-tertiary: #132d3a;
  --surface-primary: #132d3a;
  --surface-hover: #1a3847;
  --text-primary: #e8edf0;
  --text-secondary: #A9B8BF;
  --text-muted: #7f94a0;
  --text-heading: #e8edf0;
  --border-color: #1e4050;
  --border-light: #162e3c;
  --input-bg: #0a1e28;
  --input-border: #294C60;
  --nav-bg: #081820;
  --nav-border: rgba(92,163,199,0.12);
  --nav-text: rgba(255,255,255,0.45);
  --nav-item-color: #A9B8BF;
  --nav-item-hover: rgba(255,255,255,0.06);
  --nav-item-active: #5CA3C7;
  --topbar-bg: #0E2833;
  --topbar-border: rgba(92,163,199,0.15);
  --thead-bg: #1a3847;
  --thead-color: #A9B8BF;
  --overlay-bg: rgba(0,0,0,0.7);
  --widget-header-bg: #1a3847;
  --badge-admin-bg: rgba(92,163,199,0.25);
  --badge-admin-color: #7EC8E3;
  --badge-staff-bg: rgba(109,40,217,0.2);
  --badge-staff-color: #a78bfa;
  --badge-google-bg: rgba(217,119,6,0.2);
  --badge-google-color: #fbbf24;

  /* Functional colors — semi-transparent for dark bg */
  --primary-light: rgba(92,163,199,0.2);
  --success-light: rgba(98,157,143,0.2);
  --warning-light: rgba(217,119,6,0.2);
  --danger-light: rgba(220,38,38,0.2);

  /* Gray scale inverted */
  --gray-50: #0a1e28;
  --gray-100: #132d3a;
  --gray-200: #1e4050;
  --gray-300: #294C60;
  --gray-400: #7f94a0;
  --gray-500: #A9B8BF;
  --gray-600: #c8d4da;
  --gray-700: #e0e8ec;
  --gray-800: #e8edf0;
  --gray-900: #f5f7f8;

  /* Brand tints for dark */
  --ce-blue-20: #1a3847;
  --ce-green-20: #1a3020;
  --ce-teal-20: #1a302a;

  /* Shadows — darker */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.35), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.4), 0 4px 6px rgba(0,0,0,0.3);

  color-scheme: dark;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .two-col {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}