:root {
  --primary-color: #4f46e5;
  --secondary-color: #6366f1;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --info-color: #3b82f6;
  --dark-color: #1f2937;
  --light-color: #f3f4f6;
  --border-color: #e5e7eb;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --sidebar-width: 260px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #f9fafb;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Pages */
.page {
  display: none;
}

.page.active {
  display: flex;
}

/* Login Page */
#loginPage {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container {
  width: 100%;
  max-width: 450px;
}

.login-card {
  background: white;
  border-radius: 12px;
  padding: 48px 40px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.login-card h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  text-align: center;
}

.subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 32px;
  font-size: 14px;
}

/* Form Elements */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn .icon {
  width: 18px;
  height: 18px;
}

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

.btn-primary:hover {
  background: #4338ca;
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary:hover {
  background: #4b5563;
}

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

.btn-success:hover {
  background: #059669;
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-block {
  width: 100%;
}

/* Error Messages */
.error-message {
  background: #fee2e2;
  color: #991b1b;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  border-left: 4px solid var(--danger-color);
}

/* Admin Panel Layout */
#adminPanel {
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: white;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.admin-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  display: block;
  margin-bottom: 4px;
}

.admin-role {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  padding: 4px 8px;
  background: var(--primary-color);
  color: white;
  border-radius: 4px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  font-size: 14px;
  font-weight: 500;
}

.nav-item .icon {
  width: 20px;
  height: 20px;
}

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

.nav-item.active {
  background: #eef2ff;
  color: var(--primary-color);
  border-right: 3px solid var(--primary-color);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
}

/* Main Content */
.main-content {
  margin-left: var(--sidebar-width);
  padding: 32px;
  min-height: 100vh;
}

.content-page {
  display: none;
}

.content-page.active {
  display: block;
}

.page-header {
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
}

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

.search-input {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  min-width: 250px;
}

.filter-select {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  background: white;
  cursor: pointer;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.stat-card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  gap: 16px;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.stat-card:hover {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.stat-icon.bg-blue { background: #3b82f6; }
.stat-icon.bg-green { background: #10b981; }
.stat-icon.bg-purple { background: #8b5cf6; }
.stat-icon.bg-orange { background: #f59e0b; }
.stat-icon.bg-red { background: #ef4444; }
.stat-icon.bg-teal { background: #14b8a6; }

.stat-details {
  flex: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.stat-change {
  font-size: 13px;
  color: var(--text-secondary);
}

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

/* Card */
.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: 24px;
}

.mt-4 {
  margin-top: 2rem;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table thead {
  background: var(--light-color);
}

.table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table td {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 14px;
}

.table tbody tr:hover {
  background: var(--light-color);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-secondary { background: #e5e7eb; color: #374151; }

/* API Tester */
.api-tester-container {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 24px;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.api-sidebar {
  background: var(--light-color);
  padding: 24px;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
}

.api-category {
  margin-bottom: 24px;
}

.api-category h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.api-endpoint {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  margin-bottom: 4px;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 12px;
  font-family: 'Monaco', 'Courier New', monospace;
  cursor: pointer;
  transition: var(--transition);
}

.api-endpoint:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.api-main {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.request-header {
  display: flex;
  gap: 12px;
}

.method-select {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  background: white;
  cursor: pointer;
  width: 120px;
}

.endpoint-input {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  font-family: 'Monaco', 'Courier New', monospace;
}

.request-body h3 {
  font-size: 14px;
  font-weight: 600;
  margin: 16px 0 8px;
  color: var(--text-primary);
}

.code-editor {
  width: 100%;
  min-height: 120px;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  resize: vertical;
}

.api-response-section h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.response-info {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.status-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.response-time {
  padding: 4px 12px;
  background: var(--light-color);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.response-body {
  background: #1f2937;
  color: #d1d5db;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  max-height: 400px;
  overflow-y: auto;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: 12px;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-size: 20px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--light-color);
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Utilities */
.text-muted {
  color: var(--text-secondary);
}

.text-center {
  text-align: center;
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: var(--transition);
  }

  .sidebar.active {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    flex-direction: column;
  }

  .search-input {
    width: 100%;
  }

  .api-tester-container {
    grid-template-columns: 1fr;
  }

  .api-sidebar {
    max-height: 300px;
  }
}