:root{--black: #191f28;--white: #ffffff;--gray-50: #f9fafb;--gray-100: #f2f4f6;--gray-200: #e5e8eb;--gray-300: #d1d6db;--gray-400: #b0b8c1;--gray-500: #8b95a1;--gray-600: #6b7684;--gray-700: #4e5968;--gray-900: #191f28;--blue: #3182f6;--blue-light: #e8f3ff;--red: #f04452;--red-light: #ffebee;--green: #00c853;--green-light: #e8f5e9;--yellow: #ffc107;--yellow-light: #fff8e1}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--gray-50);color:var(--gray-900);line-height:1.5}.app{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--white);border-right:1px solid 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