body {
  /* Box sizing */
  min-height: 100dvh;
  margin: 0;
  /* Typography */
  font-family: sans-serif;
  /* Layout */
  display: grid;
  grid-template-rows: auto 1fr auto;
}

header {
  grid-row: 1;
}

main {
  /* Grid position */
  grid-row: 2;
  /* Layout */
  display: grid;
  place-items: center;
}

footer {
  grid-row: 3;
}