Pre-requisites for custom styles:
Page layout:
Page size, margins, line height, footnotes
Pagina:
Page numbers, Running titles, Decoration styles
Paragraph styles:
Styles for Title, sub-title, Heading 1, Heading 2, Heading 3, Quotation, Standard text, Lists, Captions, footnotes etc.
For each style we need font name, font size, line height, distance to the previous paragraph, indent, justification