src/theme/App.css
.App {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    padding: 0;
  }
  .key-manager {
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .key-manager h2 {
    text-align: center;
  }
  
  .key-manager input {
    margin-bottom: 10px;
    padding: 8px;
    font-size: 16px;
  }
  
  .key-manager button {
    padding: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
    margin-bottom: 10px;
  }
  
  .key-manager button:hover {
    background-color: #0056b3;
  }

  .key-manager ul {
    list-style-type: none;
    padding: 0;
  }

  .key-manager li {
    margin-bottom: 5px;
  }

  .key-manager li button {
    margin-left: 10px;
    background-color: #dc3545;
    color: white;
    border: none;
    cursor: pointer;
  }

  .key-manager li button:hover {
    background-color: #c82333;
  }

  .key-manager li button:focus {
    outline: none;
  }

  .key-manager li button:active {
    background-color: #bd2130;
  }

  .key-manager li button:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
  }

  .key-manager li button:disabled:hover {
    background-color: #6c757d;
  }
  .settings-container {
    width: 600px;
    margin: 0 auto;
    font-family: Arial, sans-serif;
  }
  
  .settings-section {
    margin-bottom: 20px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 8px;
  }
  
  h1 {
    text-align: center;
    color: #333;
  }
  
  input[type="text"] {
    display: block;
    width: 100%;
    padding: 8px;
    margin: 10px 0;
    border-radius: 4px;
    border: 1px solid #ccc;
  }
  
  button {
    background-color: #007bff;
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  label {
    margin-right: 10px;
  }
  