We are using custom HTML in our Markdown articles and applying site-level CSS through to style the content and render flowcharts on our knowledge base site. The flowcharts display correctly on the published site, but when we export the same articles using the PDF export option, the content appears without the applied CSS styling. As a result, the flowcharts lose their intended layout, colors, borders, and visual structure in the exported PDF. We understand that site-level Custom CSS currently applies only to the knowledge base site and is not supported in PDF exports. However, this limitation prevents us from maintaining a consistent presentation across the online documentation and downloaded PDFs. We would like the PDF export functionality to support site-level Custom CSS so that custom HTML elements, flowcharts, diagrams, and other styled content retain the same intended appearance in exported PDFs as they do on the published knowledge base site. Could you consider adding support for site-level Custom CSS in PDF exports, or providing an alternative way to define custom styles specifically for PDF generation? This would help us maintain consistent formatting and presentation across both the published knowledge base and its downloadable PDF documents.