body{
  background-color: #ddd;
  font-family: sans-serif;
}
h2{
  text-align: center;
}
section, ul li a{
  border-radius: 3px;
  padding: 1em;
  margin: 1em;
}
section, section > div, ul, ul li a{
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}
section{
  background-color: #f6f6f6;
}
section > div{
  flex-direction: column;
}
ul li{
  list-style: none;
}
ul li a{
  flex-direction: column;
  background-color: white;
  text-decoration: none;
}
a span{
  color: grey;
}