body {
  margin: 0;
  color: #333;
  font-size: 18px;
  font-family: sans-serif;
  line-height: 1.5;
}

h1 {
  margin-top: 50px;
  margin-bottom: 10px;

  font-size: 60px;
  text-align: center;
}

h2 {
   margin-top: 0;
  padding-bottom: 30px;
  font-size: 25px;
  text-align: center;
  border-bottom: 2px solid #e3e3e3;
}

main {
  width: 900px;
  margin: auto;
}

section {
  margin: 50px 0;
  padding: 0 50px;
}

section h2 {
  padding: 0;
  text-align: left;
  border: none;
}

ul li {
  margin-bottom: 10px;
}