:root {
    --primary-color: #3f51b5;
    --primary-light: #7986cb;
    --primary-dark: #303f9f;
    --secondary-color: #ff4081;
    --text-color: #333;
    --text-light: #666;
    --background-color: #f5f5f5;
    --card-color: #fff;
    --border-color: #e0e0e0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --rdp-color: #2979ff;
    --ssh-color: #4caf50;
    --vnc-color: #ff9800;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  /* Header styles */
  header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
  }
  
  .logo i {
    margin-right: 0.5rem;
  }
  
  nav ul {
    display: flex;
    list-style: none;
  }
  
  nav li {
    margin-left: 1.5rem;
  }
  
  nav a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
  }
  
  nav a:hover {
    opacity: 0.8;
  }
  
  /* Main content */
  main {
    padding: 2rem 0;
  }
  
  .page-title {
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    color: var(--primary-dark);
  }
  
  /* Card styles */
  .card {
    background-color: var(--card-color);
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
  }
  
  .card-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
  }
  
  .card-title i {
    margin-right: 0.5rem;
  }
  
  /* Connection list */
  .connections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
  }
  
  .connection-card {
    background-color: var(--card-color);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    border-left: 4px solid var(--primary-color);
  }
  
  .connection-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
  }
  
  .connection-card.rdp {
    border-left-color: var(--rdp-color);
  }
  
  .connection-card.ssh {
    border-left-color: var(--ssh-color);
  }
  
  .connection-card.vnc {
    border-left-color: var(--vnc-color);
  }
  
  .connection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
  }
  
  .connection-name {
    font-weight: bold;
    color: var(--text-color);
  }
  
  .connection-actions {
    display: flex;
  }
  
  .connection-actions button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 0.25rem;
    margin-left: 0.25rem;
    transition: color 0.2s;
  }
  
  .connection-actions button:hover {
    color: var(--primary-color);
  }
  
  .connection-details {
    font-size: 0.9rem;
    color: var(--text-light);
  }
  
  .connection-host {
    display: flex;
    align-items: center;
    margin-bottom: 0.25rem;
  }
  
  .connection-host i {
    width: 16px;
    margin-right: 0.5rem;
  }
  
  .connection-type {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    border-radius: 4px;
    color: white;
    background-color: var(--primary-light);
    margin-top: 0.5rem;
  }
  
  .connection-type.rdp {
    background-color: var(--rdp-color);
  }
  
  .connection-type.ssh {
    background-color: var(--ssh-color);
  }
  
  .connection-type.vnc {
    background-color: var(--vnc-color);
  }
  
  /* Forms */
  .form-group {
    margin-bottom: 1.5rem;
  }
  
  label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
  }
  
  input[type="text"],
  input[type="password"],
  input[type="number"],
  input[type="email"],
  select,
  textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
  }
  
  input:focus,
  select:focus,
  textarea:focus {
    outline: none;
    border-color: var(--primary-light);
  }
  
  .form-row {
    display: flex;
    gap: 1rem;
  }
  
  .form-row .form-group {
    flex: 1;
  }
  
  .form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
  }
  
  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    border: none;
  }
  
  .btn i {
    margin-right: 0.5rem;
  }
  
  .btn-primary {
    background-color: var(--primary-color);
    color: white;
  }
  
  .btn-primary:hover {
    background-color: var(--primary-dark);
  }
  
  .btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
  }
  
  .btn-secondary:hover {
    background-color: rgba(63, 81, 181, 0.05);
  }
  
  .btn-success {
    background-color: var(--success-color);
    color: white;
  }
  
  .btn-success:hover {
    background-color: #388e3c;
  }
  
  .btn-danger {
    background-color: var(--error-color);
    color: white;
  }
  
  .btn-danger:hover {
    background-color: #d32f2f;
  }
  
  .btn-icon {
    padding: 0.5rem;
    border-radius: 50%;
    width: 2.5rem;
    height: 2.5rem;
  }
  
  /* Tabs */
  .tabs {
    display: flex;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .tab {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s;
  }
  
  .tab:hover {
    border-bottom-color: var(--primary-light);
  }
  
  .tab.active {
    border-bottom-color: var(--primary-color);
    font-weight: 500;
  }
  
  /* Alerts */
  .alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
  }
  
  .alert-success {
    background-color: rgba(76, 175, 80, 0.1);
    border-left: 4px solid var(--success-color);
  }
  
  .alert-warning {
    background-color: rgba(255, 152, 0, 0.1);
    border-left: 4px solid var(--warning-color);
  }
  
  .alert-error {
    background-color: rgba(244, 67, 54, 0.1);
    border-left: 4px solid var(--error-color);
  }
  
  /* Modal */
  .modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
  }
  
  .modal {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
  }
  
  .modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .modal-title {
    font-size: 1.2rem;
    font-weight: 500;
  }
  
  .modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
  }
  
  .modal-body {
    padding: 1.5rem;
  }
  
  .modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
  }
  
  /* Connection viewer */
  .connection-viewer {
    display: flex;
    flex-direction: column;
    height: 100%;
  }
  
  .connection-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--primary-dark);
    color: white;
  }
  
  .connection-toolbar-title {
    display: flex;
    align-items: center;
  }
  
  .connection-toolbar-title i {
    margin-right: 0.5rem;
  }
  
  .connection-toolbar-actions {
    display: flex;
    gap: 0.5rem;
  }
  
  .connection-toolbar-actions button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color 0.2s;
  }
  
  .connection-toolbar-actions button:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .connection-content {
    flex: 1;
    background-color: #000;
  }
  
  /* Loading and empty states */
  .loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--text-light);
  }
  
  .spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--primary-color);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  .empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
  }
  
  .empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
  }
  
  .empty-state-actions {
    margin-top: 1rem;
  }
  
  /* Authentication pages */
  .auth-container {
    max-width: 400px;
    margin: 3rem auto;
  }
  
  .auth-logo {
    text-align: center;
    margin-bottom: 2rem;
  }
  
  .auth-logo i {
    font-size: 3rem;
    color: var(--primary-color);
  }
  
  .auth-title {
    text-align: center;
    margin-bottom: 2rem;
  }
  
  .auth-footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-light);
  }
  
  .auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
  }
  
  /* Group management */
  .groups-section {
    margin-bottom: 2rem;
  }
  
  .group-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .group-name {
    display: flex;
    align-items: center;
  }
  
  .group-name i {
    margin-right: 0.5rem;
    color: var(--primary-color);
  }
  
  /* Responsive styles */
  @media (max-width: 768px) {
    .form-row {
      flex-direction: column;
      gap: 0;
    }
    
    .connections-grid {
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .tabs {
      overflow-x: auto;
      white-space: nowrap;
    }
    
    .form-actions {
      flex-direction: column;
    }
    
    .form-actions button {
      width: 100%;
    }
  }
  
  /* Terminal styling for SSH connections */
  .terminal {
    background-color: #000;
    color: #f0f0f0;
    font-family: 'Courier New', monospace;
    padding: 1rem;
    height: 100%;
    overflow: auto;
  }
  
  .terminal-content {
    white-space: pre-wrap;
  }
  
  /* Favorite icon */
  .favorite-icon {
    color: var(--text-light);
    transition: color 0.2s;
  }
  
  .favorite-icon.active {
    color: #ff9800;
  }
  
  /* Search bar */
  .search-bar {
    margin-bottom: 1.5rem;
    display: flex;
    gap: 0.5rem;
  }
  
  .search-input {
    flex: 1;
    position: relative;
  }
  
  .search-input input {
    padding-left: 2.5rem;
  }
  
  .search-input i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
  }
  
  /* Filter toolbar */
  .filter-toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
  }
  
  .filter-item {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    background-color: white;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    display: flex;
    align-items: center;
  }
  
  .filter-item i {
    margin-right: 0.5rem;
  }
  
  .filter-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
  }
  
  /* Connection history */
  .history-list {
    border: 1px solid var(--border-color);
    border-radius: 4px;
  }
  
  .history-item {
    display: flex;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .history-item:last-child {
    border-bottom: none;
  }
  
  .history-icon {
    margin-right: 1rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
  }
  
  .history-icon.rdp {
    background-color: var(--rdp-color);
  }
  
  .history-icon.ssh {
    background-color: var(--ssh-color);
  }
  
  .history-icon.vnc {
    background-color: var(--vnc-color);
  }
  
  .history-details {
    flex: 1;
  }
  
  .history-connection {
    font-weight: 500;
  }
  
  .history-meta {
    display: flex;
    font-size: 0.85rem;
    color: var(--text-light);
  }
  
  .history-meta > div {
    margin-right: 1.5rem;
  }
  
  .history-meta i {
    margin-right: 0.25rem;
  }
  
  /* Dashboard stats */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
  }
  
  .stat-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    text-align: center;
  }
  
  .stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
  }
  
  .stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
  }
  
  .stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
  }