CSS code to Change Category Title in Archive Block to H3 Tag

Site URL: https://lifedeeperstill.com/blog

My site is lifedeeperstill.squarespace.com

I have inserted an 'Archive' block in the blog page (https://lifedeeperstill.com/blog) but I want to change the 'Category title' within the 'Archive' Block to an H3 tag format.

Any help with CSS code for this will be highly appreciated. Thanks.

CSS can change title style (color, size, font family....) but it can't change tag (eg: h4 to h2, h2 to h3,..)

any help appreciated, I used the following code

ul.archive-group-list * {
font-size: 80%;  
}

to try and make the archive block text smaller - it worked fine except for the headings (category names).

It is an index archive of blog posts by category.

Does anyone know how i can make the headings smaller also?

Thank you!!

1 minute ago, Rosalind said:

any help appreciated, I used the following code

ul.archive-group-list * {
font-size: 80%;  
}

to try and make the archive block text smaller - it worked fine except for the headings (category names).

It is an index archive of blog posts by category.

Does anyone know how i can make the headings smaller also?

Thank you!!

try font-size: 80% !important;

wow, that actually worked, thank you so so much! 

Do you also know how to reduce the spacing after each heading?