:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;padding:0;min-width:320px;min-height:100vh;transition:background-color .3s,color .3s}body.dark-mode{background-color:#121212;color:#fff}#root{width:100%;height:100vh}:root{--bg-primary: #f0f6ff;--bg-secondary: #ffffff;--text-primary: #333333;--text-secondary: #666666;--border-color: #e0e0e0;--active-item: #e0e9ff;--hover-item: #f0f6ff;--accent-color: #3b82f6;--accent-hover: #2563eb;--shadow-color: rgba(0, 0, 0, .05);--shadow-hover: rgba(0, 0, 0, .1);--file-border: #eaeaea}.dark-mode{--bg-primary: #121212;--bg-secondary: #1e1e1e;--text-primary: #ffffff;--text-secondary: #b0b0b0;--border-color: #2a2a2a;--active-item: #2d3748;--hover-item: #252525;--accent-color: #4f8df9;--accent-hover: #3b82f6;--shadow-color: rgba(0, 0, 0, .2);--shadow-hover: rgba(0, 0, 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