*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  background: #0a0020;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#gameCanvas {
  display: block;
  touch-action: none;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#rotate-hint {
  display: none;
  position: fixed;
  inset: 0;
  background: #0a0020;
  color: #00eedd;
  font: bold 18px monospace;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 9999;
  line-height: 2;
}

#rotate-hint span {
  font-size: 48px;
  display: block;
}

@media (orientation: landscape) and (max-height: 500px) {
  #rotate-hint { display: flex; }
}