.app{text-align:center;margin-top:50px;font-family:Trebuchet MS,Lucida Sans Unicode,Lucida Grande,Lucida Sans,Arial,sans-serif}h1{font-size:2rem;margin-bottom:30px}.count{font-size:1.5rem;margin:30px 0}.btn{padding:10px 20px;background-color:#000;border:none;color:#fff;font-size:1rem;border-radius:8px;cursor:pointer;transition:.5s}.btn:hover{background-color:pink}