Custom Image Lightbox Caption in Squarespace 7.1

Site URL: https://www.moremanagement.ch/about-us

Dear Circle,

Still getting used to "tweaking" CSS styles in 7.1 🙂

I'm currently working on this website: https://www.moremanagement.ch/about-us (in prod., so temp password = more)

My client would like the details of the team members portraits to appear in a lightbox fashion. My problem (if you take the current and only exemple of the first portrait > Yannick Rebetez, by clicking on his photo) is how can I change the style of the caption, currently black text on black translucent background. And also making sure the font is the correct one (body).

Thanks for any advice! Otherwise, I'll just find another way. 🙂 

Best,

J.J.