body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: #f9f9f9;
    color: #333;
  }
  h1 {
    text-align: center;
    margin-bottom: 30px;
  }
  section {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 15px 20px;
    margin-bottom: 30px;
  }
  section h2 {
    margin-top: 0;
    color: #444;
  }
  label {
    font-weight: bold;
  }
  input, textarea, button {
    display: block;
    margin: 8px 0 15px;
    padding: 8px;
    width: 100%;
    max-width: 400px;
    border: 1px solid #ccc;
    border-radius: 3px;
    font-size: 1rem;
  }
  button {
    cursor: pointer;
    background: #0077cc;
    color: #fff;
    border: none;
  }
  button:hover {
    background: #005fa3;
  }
  .result {
    background: #eaeaea;
    padding: 10px;
    border-radius: 3px;
    margin-top: 10px;
  }
  table {
    border-collapse: collapse;
    width: 100%;
    max-width: 500px;
    margin-top: 10px;
  }
  table, th, td {
    border: 1px solid #999;
  }
  th, td {
    padding: 8px;
    text-align: left;
  }