html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}
body {
  background: radial-gradient(circle at 50% 40%, #0b1020 0%, #091123 60%, #070d1b 100%);
  background-color: #091123;
}
#stage {
  position: fixed;
  inset: 0;
  width: 100dvw;
  height: 100dvh;
  display: block;
}
@media (prefers-reduced-motion: reduce) {
  body.reduced #stage { display: none; }
}