/* ========================================
   Admin Panel - CSS Styles
   ======================================== */

/* CSS Variables */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary: #64748b;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  
  --sidebar-width: 260px;
  --header-height: 64px;
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ========================================
   Layout
   ======================================== */

.admin-layout {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-content {
  flex: 1;
  padding: 24px;
}

/* ========================================
   Sidebar
   ======================================== */

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.sidebar-logo svg {
  width: 32px;
  height: 32px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  transition: var(--transition);
  margin-bottom: 4px;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--primary);
  color: white;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-item span {
  font-weight: 500;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.user-info:hover {
  background: var(--bg-tertiary);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.user-details {
  flex: 1;
}

.user-name {
  font-weight: 600;
  color: var(--text-primary);
}

.user-role {
  font-size: 12px;
  color: var(--text-muted);
}

/* ========================================
   Header
   ======================================== */

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

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-btn {
  display: none;
  padding: 8px;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
}

.mobile-menu-btn:hover {
  background: var(--bg-tertiary);
}

.page-title {
  font-size: 18px;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-search {
  position: relative;
}

.header-search input {
  width: 240px;
  padding: 8px 12px 8px 36px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  transition: var(--transition);
}

.header-search input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-primary);
}

.header-search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.header-btn {
  position: relative;
  padding: 8px;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  transition: var(--transition);
}

.header-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.header-btn svg {
  width: 20px;
  height: 20px;
}

.notification-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  background: var(--danger);
  border-radius: 50%;
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-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-title {
  font-size: 16px;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.stat-content h3 {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.stat-change {
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-change.positive {
  color: var(--success);
}

.stat-change.negative {
  color: var(--danger);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-icon.blue {
  background: #dbeafe;
  color: var(--primary);
}

.stat-icon.green {
  background: #dcfce7;
  color: var(--success);
}

.stat-icon.orange {
  background: #fef3c7;
  color: var(--warning);
}

.stat-icon.purple {
  background: #f3e8ff;
  color: #9333ea;
}

/* ========================================
   Charts Grid
   ======================================== */

.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.chart-container {
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

/* ========================================
   Tables
   ======================================== */

.table-container {
  overflow-x: auto;
}

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

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg-secondary);
}

.data-table th.sortable {
  cursor: pointer;
  user-select: none;
}

.data-table th.sortable:hover {
  color: var(--text-primary);
}

.data-table tbody tr:hover {
  background: var(--bg-secondary);
}

.data-table td {
  color: var(--text-secondary);
}

/* Table toolbar */
.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 16px;
}

.table-search {
  position: relative;
  flex: 1;
  max-width: 300px;
}

.table-search input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.table-search input:focus {
  outline: none;
  border-color: var(--primary);
}

.table-search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.table-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Product image in table */
.product-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.product-image {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  object-fit: cover;
  background: var(--bg-tertiary);
}

.product-name {
  font-weight: 500;
  color: var(--text-primary);
}

/* User cell */
.user-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-cell-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

/* Action buttons */
.action-btns {
  display: flex;
  gap: 4px;
}

.action-btn {
  padding: 6px;
  border-radius: 6px;
  color: var(--text-muted);
  transition: var(--transition);
}

.action-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.action-btn.edit:hover {
  color: var(--primary);
}

.action-btn.delete:hover {
  color: var(--danger);
}

/* ========================================
   Badges
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: #dcfce7;
  color: #166534;
}

.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-info {
  background: #dbeafe;
  color: #1e40af;
}

.badge-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: var(--transition);
}

.btn svg {
  width: 16px;
  height: 16px;
}

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

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

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

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

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-tertiary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* ========================================
   Pagination
   ======================================== */

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid var(--border-color);
  margin-top: 16px;
}

.pagination-info {
  font-size: 13px;
  color: var(--text-muted);
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.pagination-btn {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ========================================
   Login Page
   ======================================== */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-primary);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 40px;
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.login-logo svg {
  width: 40px;
  height: 40px;
}

.login-subtitle {
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.form-checkbox label {
  font-size: 13px;
  color: var(--text-secondary);
}

.login-btn {
  width: 100%;
  padding: 12px;
  margin-top: 8px;
}

.login-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.login-footer p {
  font-size: 13px;
  color: var(--text-muted);
}

.login-footer a {
  color: var(--primary);
  font-weight: 500;
}

.login-footer a:hover {
  text-decoration: underline;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .header-search {
    display: none;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .table-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .table-search {
    max-width: none;
  }
  
  .pagination {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* Overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

.sidebar-overlay.show {
  display: block;
}