body {
  width: 1000px;
  margin: 0 auto;
}

main, #footlinks {
  margin: 1.2rem 9vw 2.4rem;
}

nav ul {
  display: block;
  margin: 12px 0 12px;
  text-align: center;
}
nav li, nav a {
  display: inline;
}
nav li {
  margin: 0 0.4rem;
}
nav a {
  background: transparent;
}

#footlinks {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-template-rows: auto;
}
#footlinks section:nth-child(n+2) {
  margin-left: 1.2rem;
}
#footlinks h3 {
  font-size: 0.9rem;
}
#footlinks a {
  font-size: 0.9rem;
}