html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #1a0e0a;
  font-family: Arial, Helvetica, sans-serif;
}

#game-container {
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
}