html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#wrap {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}
#game {
  display: block;
  background: #12081a;
  touch-action: none;
  outline: none;
}
#rotate {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 4, 16, 0.92);
  color: #ffb020;
  font: 900 26px "Arial Black", Impact, sans-serif;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 5;
  pointer-events: none;
}
@media (orientation: portrait) and (pointer: coarse) {
  #rotate { display: flex; }
}