body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
  }
  
  h1, h2 {
    color: #2c3e50;
  }
  
  main {
    padding: 20px;
  }
  
  section {
    margin-top: 20px;
  }
  
  .conversion-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
    margin: 0 auto;
  }
  
  label, select, input, button, #result {
    font-size: 1em;
    padding: 8px;
  }
  
  button {
    background-color: #3498db;
    color: white;
    border: none;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #2980b9;
  }
  
  #result {
    margin-top: 10px;
    font-weight: bold;
    text-align: center;
  }