.completed {
    text-decoration: line-through;
    color: #6c757d;
  }
  
  .btn {
    transition: 0.2s ease;
  }
  
  .btn:hover {
    transform: scale(1.05);
  }
  
  #taskList li {
    transition: background-color 0.3s ease;
  }
  
  #taskList li:hover {
    background-color: #f8f9fa;
  }