Position the caption text on a image

Dear Enfold-Team,
I used caption text on a image. By default, this is centered vertically.
With the following css code I positioned the caption text at the bottom of the picture:
.av-image-caption-overlay-center { vertical-align: bottom; }

Now the text is cut off with the mouse hover effect.
Is there a way to position the text a little bit higher, e.g. to position in the lower third?
Or to setup a distance to the lower border?

Thanks in advance.
Best regards,
Jo