Best way to access css file when using HTML interface?

[thedodd]

Hello, I have a use case where we are generating PDFs using the HTML interface, and the HTML references a CSS stylesheet on the local file system. Looking through the docs, is appears as though file attachments might be the blessed way of being able to refer to that stylesheet, but I am not sure.

Is this a use case that is currently supported? Or would we need to inline the CSS?