body,
html {
  padding: 0;
  margin: 0;
  overflow: hidden;
  background-color: #000;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-text-size-adjust: none;
  -webkit-user-select: none;
}
#orientation {
  margin: 0 auto;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url(../rotate_portrait.png);
  background-repeat: no-repeat;
  background-position: center;
  background-color: #000;
  background-size: 25%;
  z-index: 999;
  display: none;
}