@keyframes spin{0%{transform:rotate(0)}100%{transform:rotate(2160deg)}}.playing{animation:5s cubic-bezier(.4,.5,.5,1) 0s 1 normal none running spin}#app{min-height:80vh;margin:2rem auto;padding:2rem;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,0.3);text-align:center}button{padding:1rem;font-size:2rem;display:block;margin:1rem auto}input{text-align:center;background:0;border:0;border-bottom:1px solid #999;width:100%;font-size:1.5rem;color:var(--fg-color);line-height:3rem;padding:.5rem .5rem}#input{padding:2rem;min-height:20rem;align-items:center}#output{height:40rem;font-size:1.5rem}#output>*{align-self:center}li{list-style:none}ul,ol{padding-left:0}#app h2{font-size:3rem;text-align:center;margin:3rem 0}