Problem for me

I am really sorry to be one of these I can’t find my CSS selector-types. I understand that one should know the way around this, when using your excellent plugin (which I have rated)

However I have been trying for an hour to find the CSS selector for the header in my widget area. I was sure it should be .widget-title

I have also tried every possbile combination with H3, but no luck

This is my site.
http://inköpsrådet.se/

or in IDN-encoding
http://xn--inkpsrdet-b3a7p.se

https://ww.wp.xz.cn/plugins/easy-google-fonts/