Changing fontsize inside a block

Hi

I use Page Builder and the AT Builder Page as template

I would like a larger font size under the products
The color of the text and links are editable in the
The code for the reused block I use is
<!– wp:woocommerce/product-category {“columns”:4,”categories”:[18],”orderby”:”title”} /–>
Also I wonder why the buttom is black (if you click on one of the products the buttom is steelgrey)
Is there a CSS solution?

The page I need help with: [log in to see the link]