Hey,
We’re currently a bit stuck with how the layout-xxx.html.twig file define the base 'structure' of the page.

Objective

The goal is to create a dashboard page with multiple rows and columns of with the same height.

Current state

Currently, the base template forces this HTML structure:

<div class="row row-cards">          
   <section id="" class="content">
       [...]
   </section>
</div>

Render

Current render

Here's what we have currently:

Desired render:

To achieve this, we need to apply the .row-deck class directly after the top-level .container class.
But we want the .row-deck in the top div + remove the section part.

The whole HTML wanted:

Question/Solution

1. Is there specific reason for having the section block + default row row-cards classes?
2. It may be a relic of admin-lte bundle?

It might be more flexible if this part of the structure was left for the developers to define, rather than enforced by the top-level template.

References with differents classes just after the .container div:
https://preview.tabler.io/
https://preview.tabler.io/activity.html
https://preview.tabler.io/photogrid.html