:root{--bg:#f7f8fa;--surface:#fff;--border:#e7e9ee;--text:#1a1d23;--muted:#6b7280;--accent:#2563eb;--accent-soft:#eff6ff;--danger:#dc2626;--on:#059669;--on-soft:#ecfdf5;--radius:12px;--shadow:0 1px 2px rgba(16,24,40,.04),0 1px 3px rgba(16,24,40,.06)}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;font-size:14px}a{color:inherit;text-decoration:none}.muted{color:var(--muted)}.app-shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;position:-webkit-sticky;position:sticky;top:0;height:100vh}.sidebar__brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;padding:4px 8px 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