body{font:16px system-ui;margin:0;background:#f6f7f9;color:#17212e}main{max-width:900px;margin:40px auto;padding:24px}label{display:block;margin:18px 0}input,textarea{display:block;width:min(95%,600px);padding:10px;font:inherit}button{padding:10px;margin:4px;cursor:pointer}nav{margin-bottom:24px}#message{min-height:1.5em}a{color:#1558a6}