html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #2f6494;
  font-family: Arial, Helvetica, sans-serif;
  touch-action: none;
}

#game-shell {
  width: 100vw;
  height: 100vh;
  display: grid;
  place-items: center;
  background: #ffffff;
}

#game {
  width: min(100vw, calc(100vh * 9 / 16));
  height: min(100vh, calc(100vw * 16 / 9));
  display: block;
  image-rendering: auto;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}