Teslia: Search box in jumbotron

I am trying to build my own homepage and would like to have a search box overlaid on the image in the jumbotron like in the Teslia demo, not just a search button. See attached images. One image is of the Teslia default homepage jumbotron with a useful search box. The other image is of a jumbotron made with Page Builder where you just get a useless search button (confusing too, because clicking that search button takes you to search results when you haven’t actually searched for anything).