body {
    font-family: sans-serif;
    padding: 40px;
    max-width: 700px;
    margin: auto;
  }
  button {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
  }
  a {
    color: #0055ff;
    text-decoration: none;
  }
  h1 {
    margin-top: 40px;
  }