body,html{height:100%;padding:0;margin:0}canvas{position:absolute;margin:auto;top:0;bottom:0;left:0;right:0}canvas:hover{cursor:pointer}.selected,nav .bt:hover{background:rgba(255,255,255,.5);color:#fff}nav{background:#1abc9c;-webkit-box-shadow:0 2.2px 7px #888;-moz-box-shadow:0 2.2px 7px #888;border-radius:0 2.2px 7px #888;position:absolute;top:0;left:0;width:100%;height:55px;line-height:55px}nav span{padding:12px 5px;cursor:default;margin:auto 10px;font-size:22px}nav .bt:hover{cursor:pointer}