Changing gallery slideshow bullets size

Site URL: https://romfarer-okd.squarespace.com/

Hi!
 

I'm trying to adjust the size of the bullets navigation on a full bleed slideshow gallery, but I don't understand how..

password for the page is okdesign

Add to Home > design > Custom CSS

.gallery-fullscreen-slideshow .gallery-fullscreen-slideshow-bullet-nav .gallery-fullscreen-slideshow-bullet {
    width: 30px;
    height: 30px;
}