Header Elements Disappear on Mobile (Responsive Issue)

[Satyam-Godara]

when viewing the site on a mobile device or small screen, the header links, user name, and logout button disappear. This affects usability on mobile devices.
Assign this task to me under Hacktoberfest

[HarshitAggarwal10]

I had already dont the navbar thing and already sent the pr yesterday for this.