* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 100%; height: 100%;
  background: #07050d;
  overflow: hidden;
  font-family: monospace;
}
#stage {
  width: 100vw; height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at 50% 40%, #14101f 0%, #07050d 70%);
}
#game {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  cursor: none;
  box-shadow: 0 0 40px rgba(0,0,0,0.8);
}
canvas { touch-action: none; }