Show header in mobile and not on desktop?

I previously asked how to remove the search bar from the top of the theme: https://catchthemes.com/support-forum/topic/how-do-i-delete-top-search-bar/ I was told to put this in the Custom CSS: #header-content { display:none; } That made the desktop version look great, but I recently realized it removed the menu from the mobile version of the site. It is possible to enable the header in mobile and disable in on the desktop version? (I don't mind if the search bar is at the top of the mobile version.) Thanks, Danika