Shadow effect Popup Home-page

Hi Milos,
in homepage, landingpage, the Shadow-effect off the Responsive Lightbox is too much. (see Screenshot)
On normal view is the effect nice and discret.
Where in CSS/Code off Popup can i set the effect like in a normal view off articles?

on Popup:

 

on normal-view (after clicking "Link Text"):

 

No chances to edit Shadow effect on Plugin Settings.

Regards,
Marco
 

Hello,

I need the link to your website to see this. I can't tell you much just from the images.

Regards,
Milos