:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #141418;
  font-family: system-ui, sans-serif;
}
main { width: min(800px, 100vw); text-align: center; }
canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
  image-rendering: pixelated;
  box-shadow: 0 12px 40px #000a;
}
p { margin: .7rem 0; color: #bbb; font-size: .9rem; }