body.dark-theme {
    background-color: #1e1e2d;
    color: #ffffff;
  }
  
  .dark-theme .card {
    background-color: #2a2a3c;
    color: #ffffff;
  }
  
  .dark-theme .sidebar,
  .dark-theme .header {
    background-color: #20202f;
  }
  
  .dark-theme .form-control {
    background-color: #333;
    color: #fff;
    border-color: #444;
  }