:root{color-scheme:light;--bg:#f4f6f8;--panel:#fff;--text:#1d2430;--muted:#667085;--line:#e4e7ec;--blue:#2f6fed}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text)}.shell{min-height:100vh;display:grid;place-items:center;padding:24px}.panel{width:min(400px,100%);background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px;text-align:center}.panel h1{margin:12px 0 4px;font-size:1.35rem}.panel p{margin:0 0 16px;color:var(--muted)}.panel form{display:flex;flex-direction:column;gap:10px;text-align:left}.panel label{font-size:.875rem;color:var(--muted)}.panel input{padding:12px;border:1px solid var(--line);border-radius:10px;font-size:1rem}.panel button[type=submit]{margin-top:8px;padding:12px;border:none;border-radius:10px;background:var(--blue);color:#fff;font-size:1rem;cursor:pointer}.panel button[type=submit]:disabled{opacity:.5;cursor:not-allowed}.panel button.link{background:none;border:none;color:var(--blue);cursor:pointer;font-size:.875rem}.error,.hint{font-size:.875rem}.error{color:#b42318;margin-top:12px;text-align:center}