:root{--yc-orange: #FF6600;--yc-orange-light: #FF8533;--yc-orange-dark: #CC5200;--bg-primary: #FAFAFA;--bg-secondary: #FFFFFF;--bg-tertiary: #F5F5F5;--text-primary: #1A1A1A;--text-secondary: #666666;--text-tertiary: #999999;--border-color: #E5E5E5;--success: #22C55E;--warning: #F59E0B;--error: #EF4444;--info: #3B82F6}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}.app-container{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--bg-secondary);border-right:1px solid var(--border-color);padding:24px 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