body{color:#1f2430;background:#f5f6f8;margin:0;font-family:system-ui,sans-serif}main{max-width:40rem;margin:2rem auto;padding:0 1rem}nav a{margin-right:1rem}section{background:#fff;border-radius:.5rem;margin-top:1.5rem;padding:1rem 1.25rem}button{cursor:pointer;padding:.4rem .9rem}label{margin-bottom:.75rem;display:block}input{box-sizing:border-box;width:100%;margin-top:.25rem;padding:.35rem;display:block}.ok{color:#1a7f37}