section,
footer {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 48rem;
}

ul {
  margin-bottom: 2rem;
}

footer {
  display: flex;
  flex-wrap: wrap;
}

footer > div {
  flex: 1 1 50%;
  margin-top: 3rem;
}