Vertical-align: middle for caption not working

Hello, I am having nightmares with a vertical-align (middle) for captions on Fixer. First the alignment didn't work with the Upfront settings (button, then: align caption to vertical center), then I tried to force it with CSS and didn't work properly. Some solutions work, but they look horrible on mobile.

http://www.nicolewaniowska.com

Could someone help me? Support is granted. Thanks in advance!