:root{--sidebar-width:220px;--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-primary-light:#eff6ff;--color-success:#10b981;--color-success-hover:#059669;--color-success-light:#d1fae5;--color-danger:#ef4444;--color-danger-light:#fee2e2;--color-warning:#f59e0b;--color-warning-light:#fef3c7;--color-purple:#7c3aed;--color-text:#333;--color-text-secondary:#6b7280;--color-text-muted:#9ca3af;--color-border:#e5e7eb;--color-bg:#f5f5f5;--color-bg-card:#fff;--radius:8px;--radius-sm:6px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text)}.app-shell{margin-left:var(--sidebar-width);min-height:100vh}.container{max-width:1400px;margin:0 auto;padding:20px}header{background:#fff;padding:20px 30px;margin-bottom:30px;border-radius:8px;box-shadow:0 1px 3px 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