footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  margin: 0;
  background-color: $dark-blue;
  padding: $gutter;
  color: $light-grey;

  nav {
    flex: 0 1 auto;
    margin: 5px 0;
  }
}

@media screen and (min-width: 650px) {
  footer {
    flex-direction: row;
  }
}

@media screen and (min-width: 900px) {
  footer {
    padding: ($gutter * 2) calc((100% - 850px) / 2);
    width: 850px;
  }
}