Modify the search highlight of GWPC


this is my actual configuration of the highlight that the product makes when I search for an item

and this is the result, as you see in the picture makes a very thin black line 

what im looking for, is a way of altering this thin line to make it thicker or glow in a way that the searched item is outstandingly different than the rest of the items in the view.

there is any way to make this happen? i only guessing but maybe modifying something in the mapviewer or from the site author it self perhaps there's something i'm missing.

please let me know,