html, body {
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  margin: 0;
  overflow: hidden;
  background-color: #161b22;
  font-family: Helvetica, Verdana, Arial, sans-serif;
  cursor: default;
}

body, canvas, div {
  outline: none;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  -khtml-user-select: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

canvas {
  background-color: rgba(0, 0, 0, 0);
}

#GameDiv, #Cocos3dGameContainer, #GameCanvas {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}