/* Haier Electrical Appliances Theme (Dynamic Light & Dark Modes + Full-Screen Admin Workspace) */
@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --font-main: 'Prompt', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Shared Haier Corporate Palette */
  --haier-blue: #005AAA;
  --haier-blue-dark: #004280;
  --haier-accent-cyan: #00A4E4;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --warning: #d97706;

  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Light Theme (Default) --- */
:root, [data-theme="light"] {
  --bg-main: #f4f7fa;
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --border-color: #cbd5e1;
  --header-bg: rgba(255, 255, 255, 0.95);
  --header-title: var(--haier-blue);
  --text-main: #0f172a;
  --text-muted: #475569;
  --primary: var(--haier-blue);
  --primary-hover: var(--haier-blue-dark);
  --primary-glow: rgba(0, 90, 170, 0.2);
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --badge-bg: #e0f2fe;
  --badge-border: #7dd3fc;
  --badge-text: #0369a1;
  --table-first-col: #f8fafc;
  --table-hover: #f0f9ff;
  --table-totals: #e0f2fe;
  --shadow: 0 10px 25px -5px rgba(0, 50, 110, 0.08);
  --modal-overlay-bg: rgba(15, 23, 42, 0.5);
  --modal-bg: #ffffff;
  --input-focus-bg: #ffffff;
  --tab-active: var(--haier-blue);
  --brand-card-bg: #f0f9ff;
  --brand-card-border: #bae6fd;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --bg-main: #081427;
  --bg-card: rgba(14, 30, 56, 0.88);
  --bg-input: #193158;
  --border-color: rgba(0, 164, 228, 0.25);
  --header-bg: rgba(8, 20, 39, 0.92);
  --header-title: #ffffff;
  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --primary: var(--haier-blue);
  --primary-hover: #006ecb;
  --primary-glow: rgba(0, 90, 170, 0.4);
  --accent: var(--haier-accent-cyan);
  --accent-hover: #0086bc;
  --badge-bg: rgba(0, 90, 170, 0.25);
  --badge-border: var(--haier-blue);
  --badge-text: var(--haier-accent-cyan);
  --table-first-col: #0d1e38;
  --table-hover: rgba(0, 164, 228, 0.08);
  --table-totals: rgba(0, 164, 228, 0.15);
  --shadow: 0 12px 30px -5px rgba(0, 0, 0, 0.6);
  --modal-overlay-bg: rgba(0, 0, 0, 0.8);
  --modal-bg: #102242;
  --input-focus-bg: #09162a;
  --tab-active: var(--haier-accent-cyan);
  --brand-card-bg: rgba(0, 90, 170, 0.12);
  --brand-card-border: rgba(0, 164, 228, 0.3);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  padding-bottom: 40px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================================
   STICKY HEADER — Mobile-first collapsing layout
   ============================================================ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 3px solid var(--haier-blue);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0; /* allow shrink */
}

/* Exact Haier Logo 4:3 Box Aspect Ratio Fix */
.header-logo {
  height: 46px;
  width: 61px;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  border-radius: 4px;
  flex-shrink: 0;
}

.header-title h1 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--header-title);
  letter-spacing: -0.2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-title p {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition);
  outline: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--primary-hover);
}

.btn-primary:active { transform: translateY(0); }

.btn-accent {
  background: var(--accent);
  color: white;
}

.btn-accent:hover {
  transform: translateY(-2px);
  background: var(--accent-hover);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover { background: var(--danger-hover); }

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover { border-color: var(--primary); }

.btn-large {
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  width: 100%;
  border-radius: var(--radius-md);
}

/* ============================================================
   LAYOUT CONTAINER
   ============================================================ */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 12px;
}

.card-title .step-number {
  background: var(--haier-blue);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}

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

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-select, .form-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 1rem;  /* 16px prevents iOS zoom */
  transition: var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23005AAA'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 18px;
  padding-right: 38px;
}

.form-select:focus, .form-input:focus {
  outline: none;
  border-color: var(--haier-blue);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================================
   USER INFO 2-COLUMN GRID (collapses on mobile)
   ============================================================ */
.user-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* ============================================================
   MATRIX TABLE (Desktop-style: horizontal scroll)
   ============================================================ */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  margin-bottom: 20px;
  -webkit-overflow-scrolling: touch;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 500px;
}

.matrix-table th, .matrix-table td {
  padding: 10px 12px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
}

.matrix-table th {
  background: var(--haier-blue);
  font-weight: 600;
  font-size: 0.85rem;
  color: white;
  position: sticky;
  top: 0;
  z-index: 10;
}

.matrix-table th:first-child, .matrix-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text-main);
  background: var(--table-first-col);
  position: sticky;
  left: 0;
  z-index: 5;
  min-width: 120px;
}

.matrix-table tr:hover td { background: var(--table-hover); }

.cell-input {
  width: 72px;
  padding: 8px 6px;
  text-align: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 1rem; /* 16px min prevents iOS zoom */
  font-weight: 600;
  transition: var(--transition);
}

.cell-input:focus {
  outline: none;
  border-color: var(--haier-blue);
  background: var(--input-focus-bg);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.row-total, .col-total, .grand-total {
  font-weight: 700;
  color: var(--haier-blue);
  background: var(--table-totals) !important;
}

/* ============================================================
   MOBILE BRAND CARD LAYOUT (replaces table on small screens)
   ============================================================ */
.mobile-survey-hint {
  display: none;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--badge-text);
  margin-bottom: 14px;
}

.brand-cards-container {
  display: none; /* shown on mobile via media query */
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.brand-card {
  background: var(--brand-card-bg);
  border: 1.5px solid var(--brand-card-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: var(--transition);
}

.brand-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.brand-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
}

.brand-card-total {
  background: var(--haier-blue);
  color: white;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
}

.brand-card-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}

.brand-card-input-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-card-input-group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-card-input-group .cell-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 1.1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  background: var(--bg-input);
  border: 1.5px solid var(--border-color);
  color: var(--text-main);
}

.brand-card-input-group .cell-input:focus {
  border-color: var(--haier-blue);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Mobile grand total bar */
.mobile-grand-total {
  display: none;
  background: var(--haier-blue);
  color: white;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

/* ============================================================
   STORE BADGE
   ============================================================ */
.store-badge {
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.store-badge-info h2 {
  font-size: 1.05rem;
  color: var(--text-main);
  font-weight: 700;
}

.store-badge-info p {
  font-size: 0.82rem;
  color: var(--badge-text);
  line-height: 1.5;
}

/* ============================================================
   FULL-SCREEN ADMIN WORKSPACE (Desktop focused — no mobile media)
   ============================================================ */
.admin-fullscreen-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-main);
  z-index: 1000;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.admin-topbar {
  background: var(--header-bg);
  border-bottom: 3px solid var(--haier-blue);
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}

.admin-topbar-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.admin-topbar-brand h2 {
  font-size: 1.2rem;
  color: var(--primary);
  font-weight: 700;
}

.admin-topbar-brand p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.admin-workspace-body {
  flex: 1;
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

/* Executive Dashboard Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
}

.stat-icon {
  font-size: 32px;
  width: 56px;
  height: 56px;
  background: var(--badge-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-sub {
  font-size: 0.75rem;
  display: block;
  margin-top: 2px;
}

/* Executive Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}

.chart-card.style-full-width {
  grid-column: 1 / -1;
}

.chart-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.chart-container {
  position: relative;
  height: 260px;
  width: 100%;
}

/* Admin Tabs */
.tab-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 10px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  font-family: var(--font-main);
}

.tab-btn.active {
  color: var(--tab-active);
  border-bottom-color: var(--tab-active);
}

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

/* Filter Row */
.filter-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

/* Admin Table Wrapper (Shows ~12 rows with vertical and horizontal scroll) */
.admin-table-wrapper {
  max-height: 540px;
  overflow: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  -webkit-overflow-scrolling: touch;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.admin-table th, .admin-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  white-space: nowrap;
}

.admin-table th {
  background: var(--haier-blue);
  color: white;
  position: sticky;
  top: 0;
  z-index: 10;
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 12px;
  left: 12px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--haier-blue);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.88rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: auto;
}

.toast.toast-success { border-left-color: var(--accent); }
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.spinner-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--modal-overlay-bg);
  backdrop-filter: blur(4px);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.spinner-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(0, 90, 170, 0.2);
  border-top-color: var(--haier-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  text-align: center;
  padding: 18px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* ============================================================
   RESPONSIVE — MOBILE PHONES (≤ 640px)
   Survey page only; admin stays desktop-focused.
   ============================================================ */
@media (max-width: 640px) {
  /* Header collapses to compact bar */
  header { padding: 8px 12px; gap: 8px; }
  .header-logo { height: 36px; width: 48px; }
  .header-title h1 { font-size: 0.82rem; }
  .header-title p { display: none; } /* hide subtitle on mobile */
  .header-actions { gap: 6px; }
  .header-actions .btn { padding: 7px 10px; font-size: 0.75rem; gap: 4px; }

  /* Cards tighter padding */
  .card { padding: 14px; border-radius: var(--radius-md); }
  .card-title { font-size: 0.95rem; margin-bottom: 14px; }

  /* Container full-width */
  .container { padding: 10px; }

  /* User info: stack on mobile */
  .user-info-grid { grid-template-columns: 1fr; }

  /* Store badge: stack info + button vertically */
  .store-badge { flex-direction: column; align-items: stretch; }
  .store-badge-info h2 { font-size: 0.95rem; }
  .store-badge .btn { width: 100%; justify-content: center; }

  /* ---- Survey Matrix: HIDE desktop table, SHOW brand cards ---- */
  .table-wrapper.survey-matrix-wrapper { display: none; }
  .brand-cards-container { display: flex; }
  .mobile-survey-hint { display: block; }
  .mobile-grand-total { display: block; }

  /* Make action buttons full-width stacked */
  .survey-actions { flex-direction: column; }
  .survey-actions .btn { flex: unset; width: 100%; }

  /* Toast: full-width at bottom */
  .toast-container { right: 8px; left: 8px; }
  .toast { font-size: 0.82rem; padding: 10px 12px; }

  /* Footer */
  footer { font-size: 0.75rem; padding: 14px; }
}

/* ============================================================
   TABLET (641px – 900px): slightly responsive
   ============================================================ */
@media (min-width: 641px) and (max-width: 900px) {
  .header-title h1 { font-size: 0.92rem; }
  .header-title p { font-size: 0.68rem; }
  .card { padding: 18px; }
  .user-info-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   ADMIN MOBILE IMPROVEMENTS (≤ 820px)
   Tab nav becomes a sticky bottom bar with icon + short label
   ============================================================ */
@media (max-width: 820px) {
  /* Admin topbar: compact on mobile */
  .admin-topbar { padding: 10px 12px; flex-wrap: wrap; gap: 8px; }
  .admin-topbar-brand { gap: 10px; }
  .admin-topbar-brand h2 { font-size: 0.95rem; }
  .admin-topbar-brand p { display: none; }
  .admin-topbar > div:last-child .btn { padding: 7px 10px; font-size: 0.78rem; }

  /* Workspace body: give bottom padding for the fixed tab bar */
  .admin-workspace-body { padding: 14px 12px 90px; }

  /* Fixed bottom nav bar for admin tabs */
  #adminTabNav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    display: flex;
    flex-direction: row;
    gap: 0;
    margin-bottom: 0;
    border-bottom: none;
    border-top: 2px solid var(--haier-blue);
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    padding: 0;
    overflow-x: hidden;
  }

  /* Each tab button: equal-width, stacked icon + label */
  #adminTabNav .tab-btn {
    flex: 1;
    padding: 8px 4px 10px;
    font-size: 0;   /* Hide full text via font-size */
    border-bottom: none;
    border-top: 3px solid transparent;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--text-muted);
    transition: var(--transition);
    min-width: 0;
    overflow: hidden;
  }

  /* Show only the data-short content via ::after pseudo element */
  #adminTabNav .tab-btn::after {
    content: attr(data-short);
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    display: block;
  }

  #adminTabNav .tab-btn.active {
    color: var(--tab-active);
    border-top-color: var(--tab-active);
    background: var(--badge-bg);
  }

  /* Auth card: full width on mobile */
  #adminAuthSection {
    max-width: 100% !important;
    margin: 16px 0 !important;
  }

  /* Stats grid: 2 columns on mobile */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 12px; gap: 10px; }
  .stat-icon { width: 40px; height: 40px; font-size: 22px; }
  .stat-info h3 { font-size: 1.15rem; }

  /* Charts grid: single column */
  .charts-grid { grid-template-columns: 1fr; }
  .chart-card.style-full-width { grid-column: 1; }
  .chart-container { height: 220px; }

  /* Filter row: stack */
  .filter-row { grid-template-columns: 1fr; }
}

/* Very small phones (≤ 400px): tighter admin */
@media (max-width: 400px) {
  .stats-grid { grid-template-columns: 1fr; }
  #adminTabNav .tab-btn::after { font-size: 0.62rem; }
}