:root{--bg: #f4f5f7;--surface: #ffffff;--border: #e4e7eb;--border-strong: #cdd3da;--text: #1f2733;--muted: #6b7686;--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--ok: #16a34a;--sidebar: #0f172a;--sidebar-muted: #94a3b8;--radius: 8px;--shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);--shadow-lg: 0 10px 30px rgba(16, 24, 40, .18)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,Helvetica Neue,Arial,sans-serif;color:var(--text);background:var(--bg);font-size:14px;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit}.app-shell{display:flex;height:100vh;overflow:hidden}.sidebar{width:230px;flex-shrink:0;background:var(--sidebar);color:#e2e8f0;display:flex;flex-direction:column;padding:16px 12px}.sidebar .brand{font-weight:700;font-size:16px;padding:8px 12px 18px;color:#fff;letter-spacing:.2px}.sidebar .brand 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