:root{--bg: #f6f7f9;--surface: #fff;--text: #16181d;--muted: #6b7280;--line: #e5e7eb;--brand: #0a6cff;--brand-ink: #fff;--danger: #d92d20;--warn-bg: #fff7e6;--warn: #8a5a00;--err-bg: #fdecea;--radius: 10px;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;font-size:14px}h1{font-size:22px;margin:0 0 4px}h2{font-size:17px;margin:0}.muted{color:var(--muted)}.strong{font-weight:600}code{background:#f1f3f6;padding:1px 6px;border-radius:4px;font-size:12px}.shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:#0f172a;color:#cbd5e1;padding:20px 12px}.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:600;padding:0 8px 20px}.brand-mark{background:var(--brand);border-radius:8px;padding:4px 7px;font-size:12px}.sidebar nav a{display:flex;justify-content:space-between;align-items:center;padding:9px 10px;border-radius:8px;margin-bottom:2px}.sidebar nav 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a.active{background:#1e293b;color:#fff}}