/* How the page looks around the game. */
* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  background: #1f2a5a;
  font-family: sans-serif;
  overflow: hidden;
}
#game {
  width: 100%;
  height: 100%;
  display: block;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
}