*{box-sizing:border-box}
body{font-family:Arial,Helvetica,sans-serif;margin:0;background:#f6f7f9;color:#1f2937}
.shell{max-width:960px;margin:80px auto;padding:32px;background:white;border:1px solid #e5e7eb;border-radius:12px}
h1{margin:0 0 8px}
.status{margin-top:24px;padding:16px;border:1px solid #d1d5db;border-radius:8px;background:#fafafa}