Left sidebar goes down on mobile view..

Hi there,

the left sidebar on my website is mostly used for my productpage as a search-filter. When i check the site on a mobile screen the sidebar will be below the products. I want this to change so that it will show at the top of the screen since this is the first thing they should see.

https://codepen.io/Sjoerd89/pen/qNJkqR

I have to show the website like this since it is offline

Thanks for your time,

Sjoerd