div{width:100px;height:100px;background:red;font-size:14px;transition:1s;color:#fff;text-align:center;line-height:100px;}
div:hover{background:green;font-size:30px;width:200px;color:#000;margin:40px;transform:rotate(180deg);border-radius: 40px;border:10px solid #ccc}