:root{
  --black: #333f52;
}
body > header,
body > section,
body > footer > *{
  max-width: 900px;
  padding: 1em;
  margin: auto;
}

body > header{
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 9rem;
}
body > header img{
  vertical-align: middle;
}
body > header > div{
  font-size: 2em;
  font-weight: 500;
}
fieldset{
  border: solid 1px var(--gray-2-dark);
  margin: 2em auto;
}