body {
  background: #ffffff;
  color: #000000;
  font-family: Arial, Helvetica, sans-serif;
  max-width: 650px;
  margin: 40px auto;
  padding: 0 16px;
  line-height: 1.5;
}

a {
  color: blue;
  text-decoration: underline;
}

a:visited {
  color: purple;
}

h1 {
  font-size: 28px;
  font-weight: bold;
}

hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 20px 0;
}