html, body {
  margin: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
  overscroll-behavior: none;
}
body {
  color: #dfe6ee;
  font: 14px/1.4 system-ui, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#game {
  display: block;
  position: fixed;
  inset: 0;
  touch-action: none;
  cursor: crosshair;
  outline: none;
}