html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  font-size: 16px;
  background-color: #F9F9F9;
}

header {
  display: block;
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid #CCC;
  margin-bottom: 20px;
  background-color: white;
}

section {
  padding: 40px;
  margin: 20px;
  border: 3px solid #EEE;
  background-color: #FCFCFC;
}
section h2 {
  font-size: 1.2rem;
}
section a {
  text-decoration: none;
  color: #7caa3c;
}
section a:hover {
  text-decoration: underline;
}