.player{display:block;width:550px;height:550px}.player,.player .playarea{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}.player .playarea button{width:8rem;height:8rem;cursor:pointer}.player .playarea.play .pause{display:none}.player .playarea.pause .pause,.player .playarea.play .play{display:inline-block}.player .playarea.pause .play{display:none}