* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 2rem;
  background: #fff;
  color: #111;
  font-family: system-ui, sans-serif;
  text-align: center;
}

h1 {
  max-width: 20ch;
  margin: 0;
  font-size: 3rem;
  line-height: 1.15;
}

@media (max-width: 600px) {
  h1 {
    font-size: 2rem;
  }
}