:root {
  color-scheme: dark;
  font-family: Arial, sans-serif;
  background: #000;
}

* {
  box-sizing: border-box;
}

html,
body,
#game {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
}

#game {
  min-width: 0;
  min-height: 0;
}

#game canvas {
  display: block;
}