body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
  }
  
  .container {
    text-align: center;
  }
  
  h1 {
    color: #333;
  }
  
  input {
    padding: 8px;
    font-size: 16px;
  }
  
  button {
    padding: 8px 16px;
    font-size: 16px;
    background-color: #4caf50;
    color: white;
    border: none;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #45a049;
  }
  
  #result {
    font-weight: bold;
    margin-top: 20px;
    color: #333;
  }