* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    }

    body {
      background: #f8f9fc;
      color: #1e293b;
      line-height: 1.6;
    }

    /* Sidebar */
    .sidebar {
      position: fixed;
      left: 0;
      top: 0;
      bottom: 0;
      width: 280px;
      background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
      padding: 32px 24px;
      color: white;
      box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08);
      z-index: 100;
    }

    .logo-section {
      margin-bottom: 48px;
    }

    .logo-title {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-subtitle {
      font-size: 13px;
      opacity: 0.9;
      font-weight: 500;
    }

    .nav-section {
      margin-bottom: 32px;
    }

    .nav-label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      opacity: 0.7;
      margin-bottom: 12px;
    }

    .nav-item {
      padding: 12px 16px;
      border-radius: 10px;
      margin-bottom: 4px;
      cursor: pointer;
      transition: all 0.2s;
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 500;
      font-size: 14px;
      text-decoration: none;
      color: white;
    }

    .nav-item:hover {
      background: rgba(255, 255, 255, 0.15);
    }

    .nav-item.active {
      background: rgba(255, 255, 255, 0.2);
    }

    .nav-icon {
      font-size: 18px;
    }

    .sidebar-footer {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
    }

    .user-card {
      background: rgba(255, 255, 255, 0.1);
      padding: 16px;
      border-radius: 12px;
      margin-bottom: 12px;
    }

    .user-email {
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .user-role {
      font-size: 11px;
      opacity: 0.8;
    }

    .logout-btn {
      width: 100%;
      padding: 12px;
      background: rgba(255, 255, 255, 0.15);
      color: white;
      border: none;
      border-radius: 10px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      font-size: 14px;
    }

    .logout-btn:hover {
      background: rgb(205, 57, 57);
    }

    /* Main Content */
    .main-content {
      margin-left: 280px;
      padding: 32px 48px;
      min-height: 100vh;
    }

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

    .page-title {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
    }

    .page-subtitle {
      color: #64748b;
      font-size: 14px;
      margin-top: 4px;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 32px;
    }

    .stat-card {
      background: white;
      padding: 24px;
      border-radius: 16px;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
      border: 1px solid #e2e8f0;
    }

    .stat-label {
      font-size: 13px;
      color: #64748b;
      font-weight: 600;
      margin-bottom: 8px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .stat-value {
      font-size: 36px;
      font-weight: 800;
      color: #0f172a;
    }

    .stat-icon {
      float: right;
      font-size: 60px;
      opacity: 0.4;
    }

    .card {
      background: white;
      border-radius: 16px;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
      border: 1px solid #e2e8f0;
      margin-bottom: 24px;
    }

    .card-header {
      padding: 24px;
      border-bottom: 1px solid #e2e8f0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .card-title {
      font-size: 18px;
      font-weight: 800;
      color: #0f172a;
    }

    .card-body {
      padding: 24px;
    }

    /* Form Styles */
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-group {
      margin-bottom: 0;
    }

    .form-group.full-width {
      grid-column: 1 / -1;
    }

    label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 8px;
    }

    .required {
      color: #ef4444;
    }

    input, select, textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid #e2e8f0;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 500;
      color: #0f172a;
      background: #f8f9fc;
      transition: all 0.2s;
      font-family: inherit;
    }

    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: #667eea;
      background: white;
      box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }

    select {
      cursor: pointer;
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%2364748b' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 16px center;
      padding-right: 45px;
    }

    .hint {
      font-size: 12px;
      color: #64748b;
      margin-top: 6px;
      font-style: italic;
    }

    /* Buttons */
    .btn {
      padding: 12px 24px;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-primary {
      background: #f1f5f9;
      color: #475569;
      display: flex;
      justify-content: center;
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      background: #e2e8f0;
    }

    .btn-secondary {
      background: #f1f5f9;
      color: #475569;
      display: flex;
      justify-content: center;
    }

    .btn-secondary:hover {
      background: #e2e8f0;
      transform: translateY(-1px);
    }

    .btn-success {
      background: #10b981;
      color: white;
    }

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

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

    .btn-group {
      display: flex;
      gap: 12px;
      margin-top: 20px;
    }

    /* Search Bar */
    .search-bar {
      position: relative;
      margin-bottom: 20px;
    }

    .search-bar input {
      padding-left: 44px;
      background: #f8f9fc;
    }

    .search-icon {
      position: absolute;
      left: 16px;
      top: 50%;
      transform: translateY(-50%);
      color: #94a3b8;
      font-size: 18px;
    }

    .search-clear {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      background: #ef4444;
      color: white;
      border: none;
      border-radius: 50%;
      width: 24px;
      height: 24px;
      cursor: pointer;
      font-size: 12px;
      display: none;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }

    .search-clear.active {
      display: flex;
    }

    .search-clear:hover {
      background: #dc2626;
    }

    /* Table */
    .data-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
    }

    .data-table thead th {
      background: #f8f9fc;
      padding: 14px 16px;
      text-align: left;
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      border-bottom: 2px solid #e2e8f0;
      position: sticky;
      top: 0;
    }

    .data-table tbody td {
      padding: 16px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 14px;
    }

    .data-table tbody tr {
      transition: all 0.2s;
    }

    .data-table tbody tr:hover {
      background: #f8f9fc;
    }

    .data-table tbody tr.duplicate {
      background: #fef3c7;
    }

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

    .action-btn {
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      border: none;
      transition: all 0.2s;
    }

    .action-btn.edit {
      background: #3b82f6;
      color: white;
      width: 60px;
    }

    .action-btn.edit:hover {
      background: #2563eb;
    }

    .action-btn.delete {
      background: #ef4444;
      color: white;
      width: 60px;
    }

    .action-btn.delete:hover {
      background: #dc2626;
    }

    .badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 11px;
      font-weight: 600;
    }

    .badge-success {
      background: #d1fae5;
      color: #065f46;
    }

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

    /* Alert Messages */
    .alert {
      padding: 16px 20px;
      border-radius: 12px;
      margin-bottom: 20px;
      display: none;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      font-weight: 500;
    }

    .alert.show {
      display: flex;
    }

    .alert-success {
      background: #d1fae5;
      color: #065f46;
      border: 1px solid #6ee7b7;
    }

    .alert-error {
      background: #fee2e2;
      color: #991b1b;
      border: 1px solid #fca5a5;
    }

    .alert-warning {
      background: #fef3c7;
      color: #92400e;
      border: 1px solid #fcd34d;
    }

    .alert-info {
      background: #e0f2fe;
      color: #075985;
      border: 1px solid #7dd3fc;
    }

    /* Modal */
    .modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(4px);
      z-index: 1000;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }

    .modal.show {
      display: flex;
    }

    .modal-content {
      background: white;
      border-radius: 16px;
      max-width: 600px;
      width: 100%;
      max-height: 90vh;
      overflow-y: auto;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }

    .modal-header {
      padding: 24px;
      border-bottom: 1px solid #e2e8f0;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .modal-title {
      font-size: 20px;
      font-weight: 700;
      color: #0f172a;
    }

    .modal-close {
      background: #f1f5f9;
      border: none;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      cursor: pointer;
      font-size: 18px;
      color: #64748b;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
    }

    .modal-close:hover {
      background: #e2e8f0;
    }

    .modal-body {
      padding: 24px;
    }

    .loading-overlay {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(4px);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 2000;
    }

    .loading-overlay.show {
      display: flex;
    }

    .spinner {
      border: 4px solid #e2e8f0;
      border-top: 4px solid #667eea;
      border-radius: 50%;
      width: 48px;
      height: 48px;
      animation: spin 0.8s linear infinite;
    }

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

    .no-data {
      text-align: center;
      padding: 60px 24px;
      color: #94a3b8;
    }

    .no-data-icon {
      font-size: 64px;
      margin-bottom: 16px;
      opacity: 0.3;
    }

    /* Login Screen */
    .login-container {
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
      padding: 24px;
    }

    .login-box {
      background: white;
      padding: 48px;
      border-radius: 20px;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      max-width: 440px;
      width: 100%;
    }

    .login-title {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 8px;
      text-align: center;
    }

    .login-subtitle {
      color: #64748b;
      text-align: center;
      margin-bottom: 32px;
      font-size: 14px;
    }

    .coord-display {
      font-size: 12px;
      color: #64748b;
      font-family: 'Courier New', monospace;
    }