body{margin:0;background:#f4f5f7;color:#1c2430;font:16px system-ui}main{max-width:850px;margin:40px auto;padding:20px}section{background:white;border:1px solid #ddd;border-radius:16px;padding:24px;margin:20px 0}h1{letter-spacing:.12em;font-size:26px}input,button{box-sizing:border-box;padding:12px;margin:6px 0;border:1px solid #bbb;border-radius:7px}input{width:100%}button{background:#243449;color:white;cursor:pointer;margin-right:8px}button:disabled{opacity:.5;cursor:default}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:14px system-ui}#status{position:sticky;bottom:10px;background:#fff;padding:16px;border:1px solid #ddd}p{line-height:1.5}