:root {
    /* color scheme */
    --primary-color: #3b82f6;
    --primary-rgb: 59, 130, 246;
    --primary-hover: #2563eb;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Dark theme backgrounds */
    --bg-primary: #121213;
    --bg-secondary: #1a1b1c;
    --bg-tertiary: #242527;
    --text-primary: #ffffff;
    --text-secondary: #b8b9ba;
    --text-muted: #6b6c6d;
    --border-color: #2d2e2f;
    
    /* Spacing & Effects */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
  }

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

  body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
  }

  .header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: relative;
  }

  .header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
  }

  .header-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
  }

  .search-container {
    position: relative;
    min-width: 300px;
  }

  .search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
  }

  #searchInput {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 60px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    outline: none;
    transition: all var(--transition-fast);
  }

  #searchInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  }

  #searchInput::placeholder {
    color: var(--text-muted);
  }

  .search-icon {
    position: absolute;
    right: 35px;
    color: var(--text-muted);
    pointer-events: none;
    font-size: 0.875rem;
  }

  .clear-search {
    position: absolute;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.875rem;
    padding: 2px;
    border-radius: 3px;
    transition: all var(--transition-fast);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .clear-search:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
  }

  .search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    display: none;
  }

  .search-results.show {
    display: block;
  }

  .search-result-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .search-result-item:hover {
    background: var(--bg-tertiary);
  }

  .search-result-item:last-child {
    border-bottom: none;
  }

  .search-result-user {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

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

  .search-result-login {
    font-size: 0.75rem;
    color: var(--text-muted);
  }

  .search-result-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: right;
  }

  .search-highlight {
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
    font-weight: 600;
  }

  .status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    font-weight: 500;
  }

  .status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--danger-color);
    animation: pulse 2s infinite;
  }

  .status-dot.connected {
    background: var(--success-color);
    animation: none;
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    outline: none;
  }

  .btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
  }

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

  .btn-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--text-secondary);
  }

  .main-content {
    padding: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
  }

  .dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
  }

  .card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
  }

  .card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity var(--transition-normal);
  }

  .card:hover::before {
    opacity: 1;
  }

  .card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    position: relative;
    z-index: 1;
  }

  .stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
  }

  .stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
  }

  .stat-item:hover {
    background: var(--bg-primary);
    border-color: var(--primary-color);
  }

  .stat-value {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
    line-height: 1;
  }

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

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

  .stat-value.neutral {
    color: var(--primary-color);
  }

  .stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
  }

  .chart-container {
    position: relative;
    height: 300px;
    margin-top: var(--spacing-md);
  }

  .activity-feed {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-tertiary);
  }

  .activity-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: background var(--transition-fast);
  }

  .activity-item:hover {
    background: var(--bg-secondary);
  }

  .activity-item:last-child {
    border-bottom: none;
  }

  .activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
  }

  .activity-icon.follow {
    background: var(--success-color);
    color: white;
  }

  .activity-icon.unfollow {
    background: var(--danger-color);
    color: white;
  }

  .activity-details {
    flex: 1;
  }

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

  .activity-time {
    font-size: 0.875rem;
    color: var(--text-muted);
  }

  .data-table {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
  }

  .table-header {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
  }

  .table-content {
    max-height: 500px;
    overflow-y: auto;
  }

  .table-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 100px;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    transition: all var(--transition-fast);
  }

  .table-row:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
  }

  .loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
  }

  .loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
  }

  .tabs {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
  }

  .tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    text-align: center;
  }

  .tab:hover:not(.active) {
    background: var(--bg-secondary);
    color: var(--text-primary);
  }

  .tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
  }

  .tab-content {
    display: none;
  }

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

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }

  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  /* Custom Scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }

  ::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
  }

  /* Responsive Design */
  @media (max-width: 768px) {
    .header {
      padding: var(--spacing-md);
      flex-direction: column;
      gap: var(--spacing-md);
    }
    
    .header h1 {
      font-size: 1.5rem;
    }
    
    .header-controls {
      flex-direction: column;
      align-items: stretch;
      gap: var(--spacing-sm);
    }
    
    .search-container {
      min-width: auto;
      width: 100%;
    }
    
    .main-content {
      padding: var(--spacing-md);
    }
    
    .dashboard-grid {
      grid-template-columns: 1fr;
      gap: var(--spacing-md);
    }
    
    .tabs {
      flex-direction: column;
    }
    
    .tab {
      margin-bottom: var(--spacing-xs);
    }
  }

  .error-state {
    text-align: center;
    padding: 3rem;
    color: var(--danger-color);
  }

  .success-state {
    text-align: center;
    padding: 3rem;
    color: var(--success-color);
  }

  /* Modal Styles */
  .modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    animation: modalFadeIn 0.3s ease;
  }

  .modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
  }

  .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  }

  .modal-header h2 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
  }

  .modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
  }

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

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

  .user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
  }

  .user-avatar {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
  }

  .user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: 700;
  }

  .user-basic-info h3 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
  }

  .user-basic-info p {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 1rem;
  }

  .user-id {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-family: monospace;
  }

  .user-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
  }

  .detail-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
  }

  .detail-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
  }

  .detail-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
  }

  .detail-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
  }

  .detail-item span:last-child {
    color: var(--text-primary);
    font-weight: 500;
    text-align: right;
    max-width: 60%;
    word-break: break-word;
  }

  .status-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
  }

  .status-badge.active {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
  }

  .status-badge.inactive {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
  }

  .status-badge.unknown {
    background: rgba(107, 108, 109, 0.2);
    color: var(--text-muted);
  }

  .user-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
  }

  .user-actions .btn {
    flex: 1;
    min-width: 120px;
  }

  @keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes modalSlideIn {
    from { 
      opacity: 0;
      transform: scale(0.9) translateY(-20px);
    }
    to { 
      opacity: 1;
      transform: scale(1) translateY(0);
    }
  }

  /* Mobile Modal Styles */
  @media (max-width: 768px) {
    .modal-content {
      width: 95%;
      max-height: 90vh;
    }

    .user-profile {
      flex-direction: column;
      text-align: center;
    }

    .user-details-grid {
      grid-template-columns: 1fr;
    }

    .user-actions {
      flex-direction: column;
    }

    .user-actions .btn {
      flex: none;
    }
  }