How can I implement a sticky behavior for a category (archive block) that remains fixed when it reaches the header?

Hi!

I have tried various code solutions, but none have worked for me. 

Can someone help on how to make the custom category block I created stay fixed when it reaches the header.

TIA

url : https://thehouseofagness.squarespace.com/flower-box

pass : 987456

Hi,

Fixed this Filter box?

Yes @tuanphan , if that would be possible thanks.
 

I see you removed Filters box, but if you need to sticky category links instead, you can use this code to Website Tools (under Not Linked) > Custom CSS

.products.collection-content-wrapper .nested-category-tree-wrapper>ul {
    position: sticky !important;
    position: -webkit-sticky !important;
    top: 200px;
    z-index: 999999;
}