:root{--bg:#f4f7fb;--panel:#fff;--ink:#142031;--muted:#5a6b84;--accent:#007a6d;--danger:#a32c2c}*{box-sizing:border-box}body{margin:0;font-family:IBM Plex Sans,Segoe UI,sans-serif;background:radial-gradient(circle at 10% 10%,#dff5f2 0,var(--bg) 45%);color:var(--ink)}main{max-width:980px;margin:0 auto;padding:24px}.card{background:var(--panel);border-radius:14px;padding:16px;margin-bottom:16px;box-shadow:0 8px 30px rgba(18,34,54,.08)}.small{color:var(--muted);font-size:13px}.warn{color:var(--danger);font-weight:600}.row{display:flex;gap:8px;flex-wrap:wrap}button,input{font:inherit;padding:8px 10px;border-radius:8px;border:1px solid #d7e0ea}button{background:var(--accent);color:#fff;border:none;cursor:pointer}pre{white-space:pre-wrap}