Re: Not WYSIWYG
But Word has Themes.
A style is a set of attributes (font, size, colour, etc) for a specific type of text such as body text or caption or whatever. A theme is a related set of styles for all the components of a document: body text, various header levels, etc.
So in Word you can use a default or a chosen theme, and mark headers, captions, etc as if you were writing html or Latex. Someone else can change the theme, and the appearance of the document is changed at a stroke. That is, if the author has used themes and styles properly.