html, body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
}
main {
  min-height: 100vh;
  display: grid;
  place-items: center;
}
h1 {
  font-size: clamp(2rem, 6vw, 5rem);
  font-weight: 600;
  margin: 0;
}