/* ============================================
   DESIGN SYSTEM - Ứng dụng Quản lý Bán hàng
   Font: Inter (Google Fonts, hỗ trợ tiếng Việt)
   Theme: Dark mode - tông xanh đậm premium
   ============================================ */

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

/* ===== CSS Variables ===== */
:root {
  /* Màu nền */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2234;
  --bg-card-hover: #1f2a3f;
  --bg-input: #0f1629;
  --bg-sidebar: #0d1321;
  --bg-header: rgba(13, 19, 33, 0.85);
  --bg-modal: rgba(0, 0, 0, 0.7);

  /* Màu chữ */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Màu accent */
  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-primary-glow: rgba(59, 130, 246, 0.15);
  --accent-secondary: #8b5cf6;
  --accent-success: #10b981;
  --accent-success-bg: rgba(16, 185, 129, 0.12);
  --accent-warning: #f59e0b;
  --accent-warning-bg: rgba(245, 158, 11, 0.12);
  --accent-danger: #ef4444;
  --accent-danger-bg: rgba(239, 68, 68, 0.12);
  --accent-info: #06b6d4;
  --accent-info-bg: rgba(6, 182, 212, 0.12);

  /* Border */
  --border-color: #1e293b;
  --border-light: rgba(255, 255, 255, 0.06);
  --border-focus: var(--accent-primary);

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-primary-glow);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 50%;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Kích thước sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed: 68px;
  --header-height: 64px;

  /* Transition */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-primary-hover);
}

/* ===== Scrollbar Custom ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

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

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: width var(--transition-slow), transform var(--transition-slow);
}

.sidebar-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.sidebar-brand {
  flex: 1;
  overflow: hidden;
}
.sidebar-brand h2 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-brand small {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md) var(--space-sm);
  overflow-y: auto;
}

.nav-section-title {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  padding: var(--space-md) var(--space-md) var(--space-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 10px var(--space-md);
  margin-bottom: 2px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}
.nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--accent-primary);
  border-radius: 0 3px 3px 0;
  transition: height var(--transition-fast);
}
.nav-item:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}
.nav-item.active {
  background: var(--accent-primary-glow);
  color: var(--accent-primary);
}
.nav-item.active::before {
  height: 60%;
}

.nav-item .nav-icon {
  font-size: 1.15rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}
.nav-item .nav-badge {
  margin-left: auto;
  background: var(--accent-danger);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--border-color);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: margin-left var(--transition-slow);
}

/* ===== Header ===== */
.app-header {
  height: var(--header-height);
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  padding: 0 var(--space-xl);
  gap: var(--space-md);
}

.header-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: var(--space-sm);
}

.header-title {
  flex: 1;
}
.header-title h1 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}
.header-title p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.header-user:hover {
  background: var(--bg-card);
}
.header-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: white;
}
.header-user-name {
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===== Page Content ===== */
.page-content {
  flex: 1;
  padding: var(--space-xl);
}

/* ===== Page Header (Title + Actions) ===== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}
.page-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
}
.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}
.card:hover {
  border-color: rgba(255, 255, 255, 0.1);
}
.card-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}
.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}
.card-body {
  padding: var(--space-lg);
}
.card-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-color);
}

/* ===== Stat Cards (Dashboard) ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}
.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  border-radius: 0 0 0 80px;
  opacity: 0.05;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 255, 255, 0.1);
}

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.stat-card .stat-icon.blue { background: var(--accent-primary-glow); color: var(--accent-primary); }
.stat-card .stat-icon.green { background: var(--accent-success-bg); color: var(--accent-success); }
.stat-card .stat-icon.orange { background: var(--accent-warning-bg); color: var(--accent-warning); }
.stat-card .stat-icon.red { background: var(--accent-danger-bg); color: var(--accent-danger); }
.stat-card .stat-icon.purple { background: rgba(139, 92, 246, 0.12); color: var(--accent-secondary); }
.stat-card .stat-icon.cyan { background: var(--accent-info-bg); color: var(--accent-info); }

.stat-card .stat-info {
  flex: 1;
}
.stat-card .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 2px;
  line-height: 1.2;
}
.stat-card .stat-sub {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
}
.btn:active { transform: scale(0.97); }
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-primary-hover);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-success {
  background: var(--accent-success);
  color: white;
}
.btn-success:hover:not(:disabled) {
  background: #059669;
}

.btn-danger {
  background: var(--accent-danger);
  color: white;
}
.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-warning {
  background: var(--accent-warning);
  color: var(--text-inverse);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
}
.btn-lg {
  padding: 12px 24px;
  font-size: 0.95rem;
}
.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

/* ===== Form Controls ===== */
.form-group {
  margin-bottom: var(--space-md);
}
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}
.form-required::after {
  content: ' *';
  color: var(--accent-danger);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.88rem;
  transition: all var(--transition-fast);
  outline: none;
}
.form-control::placeholder {
  color: var(--text-muted);
}
.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='%2394a3b8'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.form-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
}
.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-primary);
  cursor: pointer;
}

/* ===== Tables ===== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 16px;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  vertical-align: middle;
}
.data-table tbody tr {
  transition: background var(--transition-fast);
}
.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}
.data-table tbody tr:last-child td {
  border-bottom: none;
}

.table-empty {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-muted);
}
.table-empty .empty-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

/* ===== Toolbar (Search + Filters) ===== */
.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 400px;
}
.search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}
.search-box input {
  padding-left: 38px;
}

/* ===== Badges / Status Tags ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-success { background: var(--accent-success-bg); color: var(--accent-success); }
.badge-warning { background: var(--accent-warning-bg); color: var(--accent-warning); }
.badge-danger { background: var(--accent-danger-bg); color: var(--accent-danger); }
.badge-info { background: var(--accent-info-bg); color: var(--accent-info); }
.badge-primary { background: var(--accent-primary-glow); color: var(--accent-primary); }
.badge-secondary { background: rgba(148, 163, 184, 0.12); color: var(--text-secondary); }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-modal);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}
.modal-lg { max-width: 800px; }
.modal-xl { max-width: 1000px; }

.modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.modal-close:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-lg);
}

.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  max-width: 450px;
  animation: toastSlideIn 0.3s ease, toastSlideOut 0.3s ease forwards;
  animation-delay: 0s, 3s;
  font-size: 0.85rem;
}
.toast-success { border-left: 3px solid var(--accent-success); }
.toast-error { border-left: 3px solid var(--accent-danger); }
.toast-warning { border-left: 3px solid var(--accent-warning); }
.toast-info { border-left: 3px solid var(--accent-info); }

.toast-icon { font-size: 1.1rem; flex-shrink: 0; }
.toast-message { flex: 1; }
.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 2px;
}

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

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-lg) 0;
}
.pagination-btn {
  min-width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.pagination-btn:hover:not(:disabled) {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}
.pagination-btn.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}
.pagination-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.pagination-info {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0 var(--space-md);
}

/* ===== Loading Spinner ===== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 26, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Chart Container ===== */
.chart-container {
  position: relative;
  height: 300px;
  padding: var(--space-md);
}

/* ===== Grid layouts ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }

/* ===== Money/Number formatting ===== */
.money { font-variant-numeric: tabular-nums; font-weight: 600; }
.money-positive { color: var(--accent-success); }
.money-negative { color: var(--accent-danger); }

/* ===== Action Buttons in Table ===== */
.action-btns {
  display: flex;
  gap: 4px;
}
.action-btn {
  width: 30px;
  height: 30px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}
.action-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}
.action-btn.edit:hover { color: var(--accent-primary); }
.action-btn.delete:hover { color: var(--accent-danger); }
.action-btn.view:hover { color: var(--accent-info); }

/* ===== Login Page ===== */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}
.login-wrapper::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-primary-glow) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  pointer-events: none;
}
.login-wrapper::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
  bottom: -100px;
  left: -100px;
  pointer-events: none;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.login-logo {
  text-align: center;
  margin-bottom: var(--space-xl);
}
.login-logo .logo-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: var(--space-md);
}
.login-logo h1 {
  font-size: 1.3rem;
  font-weight: 800;
}
.login-logo p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.login-error {
  background: var(--accent-danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  color: var(--accent-danger);
  font-size: 0.82rem;
  display: none;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .header-toggle {
    display: block;
  }
  .page-content {
    padding: var(--space-md);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box {
    max-width: 100%;
  }
  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  html {
    font-size: 13px;
  }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--accent-success); }
.text-danger { color: var(--accent-danger); }
.text-warning { color: var(--accent-warning); }
.text-primary { color: var(--accent-primary); }
.text-sm { font-size: 0.78rem; }
.text-xs { font-size: 0.7rem; }
.fw-bold { font-weight: 700; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.d-flex { display: flex; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.hidden { display: none !important; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}