Can admin display my grid?

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Hi there

We are developing a webpage in concrete and we are using a css grid layout. When we click design on blocks, give them "grid_xx" in style, and publish the changes, everything looks fine. But when we are in edit mode, all blocks fill 100% of the content width. Is there a simple way to configure admin so it does not add extra size to the blocks, and display them the same way as they are displayed on the webpage.
This would be a huge plus for the usability of the admin module, that the admin can actually see how the blocks (boxes) will be shown to the end user.

I look forward to any comments