:root{--bg:#f6f7f9;--panel:#ffffff;--ink:#16202a;--muted:#667085;--line:#d9dee7;--blue:#2563eb;--green:#059669;--amber:#b45309;--red:#dc2626}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;letter-spacing:0}code,pre{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}pre{overflow-x:auto;white-space:pre-wrap;word-break:break-word;background:#111827;color:#e5e7eb;border-radius:8px;padding:14px;line-height:1.55;font-size:13px}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}.sidebar{border-right:1px solid var(--line);background:#101828;color:white;padding:20px}.brand{display:flex;align-items:center;gap:10px;font-weight:700;margin-bottom:28px}.darkBrand{color:var(--ink);margin:0}.brandMark{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,#2563eb,#10b981)}.nav{display:grid;grid-gap:6px;gap:6px}.nav 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