I did. It's written clearly on top of the listing I posted yesterday. I also already said that this must be about CSS and you replied "It's bootstrap don't change behaviour of that css class". But well, it's working now. Thanks a lot for your effort!

Yes because if you use that class somewhere else it break your design.

But when you change it like this it's ok.

.my-class .col-md-8 {
    // 
}

And you didn't mention that is Material Dashboard PRO before. I thought that it's pure bootstrap. But it doesn't matter, it works for you now.

Okay, that's interesting since I'll have to do more changes to CSS I guess. I'll also be more specific about the used template with my next question. Thanks again.