header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

header > nav {
  display: flex;
  flex-direction: row;
  justify-content: left;
  font-size: 1.2em;
}

header > nav > span {
    margin-right: 0.7em;
}

header > h1 {
  font-size: 2.7em;
}

footer {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

footer > hr {
  width: 100%;
}

footer > small {
  margin-top: 1em;
}