html, body { height: 100%; margin: 0; }
body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  background:
    radial-gradient(ellipse at 50% 45%, rgb(255 236 210 / 0.10), rgb(20 10 4 / 0.55) 75%),
    url("/wood.svg") center / 900px 600px repeat,
    #5c3b23;
}
main { padding: 24px; }
h1 { margin: 0; font-size: 0; line-height: 0; }
h1 img {
  display: block;
  width: min(72vw, 72vh, 520px);
  height: auto;
  filter: drop-shadow(0 6px 18px rgb(0 0 0 / 0.45));
}