body {
  box-sizing: border-box;
  display: grid;
  place-items: center;
  /* A phone's vh counts the space under its address bar too, so svh centres the sentence in what shows. */
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  padding: 1.5rem;
  background: #fff8e1;
  color: #8b1a1a;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1 {
  max-width: 20ch;
  margin: 0;
  font-size: clamp(1.75rem, 1rem + 4vw, 3.5rem);
  line-height: 1.15;
  text-align: center;
  text-wrap: balance;
}