html {
  height: 100%;
}

body {
  height: 100%;
  background-color: black;
  color: white;
  margin: 0 auto;
}

#touchDiv {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

#gameCanvas {
  position: absolute;
  display: block;
}

/* disable selection */
image, #gameCanvas {
  user-select: none;
  -ms-user-select: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
}

#fullScreenButton {
  position: absolute;
  top: 0.2em;
  margin-left: 0.2em;
  width: 2em;
  height: 2em;
  ;
}