body {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

main {
  gap: 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
}

header h1,
footer h2 {
  font-weight: normal;
}

header h1,
article p,
footer h2 {
  font-size: 3rem;
}

header span,
footer span {
  color: grey;
}

footer {
  justify-content: flex-end;
}