Increasing the height of menu

Good afternoon. In the WP theme I created would like to increase the height of the bootstrap menu. I tried to do this through the css, but when increase, the mobile submenu no longer appears. What can it be?

Please have a look at the following discussion:

Note: This is a trick for the height in desktop mode. If you want to fully customize the navbar, including the mobile behavior, you will have to tweak more than what is described.