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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  color: #333;
  background: #f0f2f5;
  line-height: 1.5;
}

a { text-decoration: none; color: inherit; }
code { background: #f5f5f5; padding: 2px 6px; border-radius: 4px; font-size: 12px; }

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

/* ==================== Sidebar ==================== */
.sidebar {
  width: 220px;
  background: #1a1a2e;
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-subtitle {
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  margin-top: 4px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: rgba(255,255,255,0.7);
  transition: all 0.2s;
  font-size: 14px;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255,255,255,0.06);
  color: #fff;
}

.nav-item.active {
  background: rgba(102,126,234,0.15);
  color: #667eea;
  border-left-color: #667eea;
}

.nav-icon { font-size: 18px; width: 24px; text-align: center; }

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.admin-info { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 8px; }

.logout-btn {
  display: inline-block;
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s;
}

.logout-btn:hover { color: #ff6b6b; }

/* ==================== Main Content ==================== */
.main-content {
  flex: 1;
  margin-left: 220px;
  min-height: 100vh;
}

.topbar {
  padding: 16px 30px;
  background: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 50;
}

.page-title { font-size: 20px; font-weight: 600; color: #1a1a2e; }

.content-body { padding: 24px 30px; }

/* ==================== Cards ==================== */
.section-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  margin-bottom: 24px;
}

.section-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: #1a1a2e; }

/* ==================== Stats Grid ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: transform 0.2s;
  cursor: pointer;
}

a.stat-card {
  text-decoration: none;
  color: inherit;
}
.stat-card:hover { transform: translateY(-2px); }

.stat-icon { font-size: 36px; }

.stat-info { display: flex; flex-direction: column; }

.stat-number { font-size: 28px; font-weight: 700; color: #1a1a2e; line-height: 1.2; }

.stat-label { font-size: 13px; color: #999; margin-top: 4px; }

.stat-users { border-left: 4px solid #667eea; }
.stat-products { border-left: 4px solid #2ed573; }
.stat-orders { border-left: 4px solid #ffa502; }
.stat-pending { border-left: 4px solid #ff6348; }
.stat-revenue { border-left: 4px solid #2ed573; }
.stat-total-revenue { border-left: 4px solid #667eea; }

/* ==================== Table ==================== */
.table-container {
  overflow-x: auto;
}

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

.data-table th {
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: #666;
  border-bottom: 2px solid #f0f0f0;
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid #f5f5f5;
  font-size: 14px;
}

.data-table tbody tr:hover { background: #f8f9ff; }

.action-cell { white-space: nowrap; }

/* ==================== Badges ==================== */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-primary { background: #e8f0fe; color: #1967d2; }
.badge-success { background: #e6f7e6; color: #1b8a3d; }
.badge-warning { background: #fff7e6; color: #d68910; }
.badge-danger { background: #fde8e8; color: #c0392b; }
.badge-info { background: #e6f7ff; color: #0b7ec8; }
.badge-default { background: #f0f0f0; color: #666; }

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary { background: #667eea; color: #fff; }
.btn-primary:hover { background: #5a6fd6; }

.btn-success { background: #2ed573; color: #fff; }
.btn-success:hover { background: #26bf65; }

.btn-danger { background: #ff6b6b; color: #fff; }
.btn-danger:hover { background: #e05555; }

.btn-warning { background: #ffa502; color: #fff; }
.btn-warning:hover { background: #e09402; }

.btn-info { background: #45aaf2; color: #fff; }
.btn-info:hover { background: #3d9ee0; }

.btn-outline { background: #fff; color: #666; border: 1px solid #ddd; }
.btn-outline:hover { border-color: #667eea; color: #667eea; }

.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ==================== Toolbar ==================== */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toolbar select,
.toolbar input[type="text"] {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 13px;
  background: #fff;
  outline: none;
}

.toolbar select:focus,
.toolbar input[type="text"]:focus {
  border-color: #667eea;
}

.search-box {
  display: flex;
  align-items: center;
}

.search-box input {
  border-radius: 8px 0 0 8px !important;
  border-right: none;
  width: 220px;
}

.search-box button {
  padding: 8px 14px;
  border: 1px solid #ddd;
  border-left: none;
  border-radius: 0 8px 8px 0;
  background: #fff;
  cursor: pointer;
  font-size: 14px;
}

.search-box button:hover { background: #f5f5f5; }

/* ==================== Pagination ==================== */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #f0f0f0;
}

.page-info { font-size: 13px; color: #999; }

.page-btns {
  display: flex;
  align-items: center;
  gap: 4px;
}

.page-btns button {
  padding: 6px 14px;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.page-btns button:hover { border-color: #667eea; color: #667eea; }

.page-current {
  padding: 6px 14px;
  background: #667eea;
  color: #fff;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
}

/* ==================== Forms ==================== */
.form-container {
  max-width: 800px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #333;
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}

.form-group textarea { resize: vertical; }

.form-tip { display: block; font-size: 12px; color: #999; margin-top: 4px; }

.form-row {
  display: flex;
  gap: 16px;
}

.form-row .form-group { flex: 1; }
.form-row .flex-2 { flex: 2; }

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.required { color: #e74c3c; }

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #f0f0f0;
}

/* ==================== Detail ==================== */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.detail-section h4 {
  font-size: 15px;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #f0f0f0;
}

.detail-table {
  width: 100%;
}

.detail-table td {
  padding: 8px 0;
  font-size: 14px;
}

.detail-table td:first-child {
  color: #999;
  width: 100px;
  white-space: nowrap;
}

/* ==================== Toast ==================== */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #333;
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 9999;
  animation: toastIn 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar-logo { font-size: 16px; }
  .sidebar-subtitle,
  .sidebar-footer,
  .nav-item span:last-child { display: none; }
  .main-content { margin-left: 60px; }
  .content-body { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { flex-direction: column; }
  .search-box input { width: 150px; }
  .sidebar-header { padding: 16px 10px; text-align: center; }
  .nav-item { justify-content: center; padding: 14px; }
  .nav-icon { font-size: 20px; }
}

/* ==================== Modal ==================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-height: 90vh;
  overflow-y: auto;
}

.modal .form-group {
  margin-bottom: 16px;
}

.modal .form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #333;
  margin-bottom: 6px;
}

.modal .form-group input[type="text"],
.modal .form-group input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.modal .form-group input:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.modal .form-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}