Hey. That’a all right. Well, now I understand why you need two menus. You want to create one menu for employers and one menu for candidate and then link them to their respective pages or other things. I don’t know how to do this specifically as I have never tried creating two menus. But yes, if you are able to create a new menu by the function and responsiveness/alignment is the only problem, then there is a CSS folder in the theme /wp-content/themes/zerif-lite/css. Also there is dedicated responsive.css file.
(Tip: to search faster where is the menu declaration, try to search in files through a text software, say I use notepad++ which performs good. Then you can easily find in which file and where the properties or media queries for the primary menu are located. Then you can try experimenting and replicating the same to a new one. Good luck!)