I use the following code to customize the ids:
http://ivanmalison.github.io/dotfiles/#usemyowndefaultnamingschemefororgheadings

It replaces the function 'org-export-get-reference' with something less
random.
You could take a similar approach, maybe substituting the function
responsible for creating the classes as well.
(I use Org mode 9.1.9, I haven't tested this code with more recent versions)


On Tue, Mar 3, 2020 at 8:07 PM KOKOU AFIDEGNON <kokou.afidegnon@gmail.com>
wrote:

> Hi,
>
> I want to replace the CSS and div layout with my custom layout from a
> theme i designed.
>
> how do i change the generated id and classes? i.e outline-container-org
> and outline-3?
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