* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #c6c6c9;
  overscroll-behavior: none;
}

/* fixed so mobile browsers never pull-to-refresh or rubber-band the page */
body {
  position: fixed;
  inset: 0;
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  -webkit-user-select: none;
  user-select: none;
  touch-action: none;
}