* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, #15173a 0%, #05050f 70%);
  color: #fff;
  font-family: "Press Start 2P", monospace;
  overflow: hidden;
}
main {
  height: 100dvh;
  display: grid;
  place-items: center;
}
canvas {
  image-rendering: pixelated;
  background: #05050f;
  border-radius: 10px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.6), 0 0 0 2px rgba(255, 255, 255, 0.06);
  max-width: 96vw;
  max-height: 96dvh;
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}