body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}

main {
  max-width: 900px;
  margin: 40px auto;
  background: #ffffff;
  padding: 40px;
  border-radius: 6px;
}

h1, h2 {
  color: #222;
}

h2 {
  margin-top: 30px;
  border-bottom: 2px solid #eee;
  padding-bottom: 5px;
}

main p,
main li {
  text-align: justify;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  color: #777;
}