body{font:16px/1.6 system-ui,sans-serif;background:#f5f7f9;color:#172d38;margin:0}main{max-width:640px;margin:auto;padding:24px}label{display:block;margin:14px 0}input,select,textarea,button{font:inherit;box-sizing:border-box;min-height:44px;width:100%;padding:10px;border:1px solid #a5b6bf;border-radius:8px}button{background:#172d38;color:white;cursor:pointer}textarea{min-height:100px}article{background:white;padding:16px;margin:12px 0;border-radius:8px}a{color:#174f82}#message{white-space:pre-wrap}article button{margin-top:12px}