Remove blue edge on button when pressed

[Port_of_Folio]

Hey, not sure if you figured this out but I just saw someone else posted a solution in the forums:

How to remove the outline when click button

I just biginner with Webflow. I am creating http://mebauxinhdep.webflow.io . When click the search button, it show a blue out line around the button. How to set remove it? Thank you!