body {
  max-width: 40em;
  margin: 2em auto;
  padding: 2em;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 18px;
  line-height: 1.6em;
  color: #333;
  background-color: #f9f9f9;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
  border-radius: 10px;
}

h1,
h2,
h3 {
  font-family: 'Helvetica Neue', sans-serif;
  font-weight: 500;
  color: #222;
}

h1 a {
  text-decoration: none;
  color: #007acc;
}

a {
  color: #007acc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

hr {
  border: none;
  height: 1px;
  background-color: #ddd;
  margin: 2em 0;
}

p {
  margin-bottom: 1.5em;
}

p em {
  display: block;
  margin-bottom: 2em;
}