body {
    font-family: Arial, sans-serif;
    padding: 20px;
  }
  
  form {
    margin-bottom: 20px;
  }
  
  label {
    display: block;
    margin-bottom: 5px;
  }
  
  input,
  textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    box-sizing: border-box;
  }
  
  button {
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  #result, #short-url-list, #statistics, #click-source-stats {
    border: 1px solid #ccc;
    padding: 10px;
    margin-top: 10px;
  }