body {
  text-align: center;
  padding: 10%;
  margin: 0;
  font: 20px Helvetica, sans-serif;
  color: #333;
}

h1 {
  font-size: 50px;
  margin-block-start: 0;
}

article {
  display: block;
  text-align: left;
  width: 90%;
  max-width: 650px;
  margin: 0 auto;
}

a {
  color: #00b9c6;
  text-decoration: none;
}

a:hover {
  color: #666;
  text-decoration: none;
}