Put search bar besides header menu

Hi friends!

I want to put the search bar on the right side of the menu bar. I tried to manipulate the classes but it didn’t work.

I want my header this way: a small logo (left), the menu (max mega menu) in the center and the search bar (right). Simple, but I can’t find the correct way.

Somebody can help me? I guess it envolves a bit of HTML and CSS (bootstrap).

The page I need help with: [log in to see the link]