Change space between columns in two column layout without ruining mobile view

Hi,

I created a page in two column layout and I wanted to give it more space between columns, so I used [one_half style=”width:46%; margin-right:8%”] on first column and [one_half style=”width:46%”] one the second one. It looks ok in desktop view but it makes total mess in mobile view.

Then I tried using grids: grid5-grid2-grid5 and it works fine, but the space between columns is too large.

Is there any way around this problem? I need this space to be 8% of page width in desktop view but not mess the mobile view at the same time.

The problematic page:
https://www.corporate-photography.eu/oferta/

Thanks in advance.

Pawel