Page Title

menu title

Any content you want to hide/show, even menu items of any type:

link

This one is not styled at all: css free ^^

another menu

These next are css minimal styled, to allow displaying more than once by line (behavior, not visual style)

example of nested one

again another one

These next are css minimal styled, to allow displaying more than once by line (behavior, not visual style)

example of nested one

Content...

Simple drop-down container using <details> html element behaviour...