[Plugin: Lightbox Plus] Center Captions Vertically

Hello,

I am using Lightbox plus and have different caption lengths. Some captions are two lines of text and some are only one line of text.

How do I center the captions vertically no matter if its one line or two lines of text?

Website: https://www.andreamarymarshall.com/selected-works/photographs/

Thanks!

https://www.ads-software.com/extend/plugins/lightbox-plus/