I don't think replacing Word documents with HTML/CSS is viable, since they specify content for two different formats. HTML is suited to flowing content like a r

I don't think replacing Word documents with HTML/CSS is viable, since they specify content for two different formats. HTML is suited to flowing content like a river, whereas Word is for documents meant to fit on a printed page, like on a stone tablet. You'd have to create quite complicated style templates to get HTML formatted to fit onto pages.