html,
body {
  margin: 0;
  min-height: 100%;
  background: #1f2933;
}

#app {
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  display: grid;
  place-items: center;
}

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

canvas {
  display: block;
}