Propositions to empower css mods:

[tienson]

@cannibalox

if we can select this div, it is possible to alter the width of the main container, to get full-width for kanban or mainmaps for instance

Reading it again and I’m curious why you need the data-page-tags to select the div.cp__sidebar-main-content? I think you can already select it using the .cp__sidebar-main-content class.