how to remove the green transparent

[BR4H1M]

every time i press the search button it makes the whole page green even in mobile version when i press the 3 lines to open the menu

[BR4H1M]

https://lvl12.shop/
theme name: Sense version 15.2.0 available

[BR4H1M]

Sense version 15.2.0 available
https://lvl12.shop/