How can I fix the persistently open categories header on my website?

Dear Members, I am having a bit of problem with the categories header of my website, it kind of always remains open which is kind of a problem. What I want is that it only should open up when we click it, otherwise it should remain closed. Here is a screenshot below to it. My website URL is https://www.brandtec.store/

In the Catalog and Product pages, you will notice the issue when you scroll up and down the page.

I will appreciate your support in this.

@PageFly-Noah

[email removed]

@Made4uo-Ribe

Please add this code to theme.liquid file before tag


    
    

Yes Sir it worked perfectly. Thank you so much for your help. You are literally the greatest among the shopify partners and community helpers.

You are very welcome!