Subnavigation Error, Drop Down Shows Up Only At Left Part Of Navigation

I have just started using wordpress so I am definitely a newb.

I am trying to use it as a CMS for my boss to add content to a couple of pages of her website that I maintain. I don’t want to start making pages with wordpress I just want to use the blog feature in place of like one of the pages of her website.

Here is the site that I’m working on: https://www.asianartsteahouse.com/blog/

(if you go to the parent site, the layout is way different because I am in the process of redesigning the layout while trying to get this wordpress blog set up at the same time)

I am trying to use my css from my original site to create subnavigation. I’m sure that I am doing it wrong and have probably been destroying the lovely code that was originally part of the theme.

But, the problem I am having is that when you scroll over my parent nav, the subnav shows up only at the furthest left part of the nav bar and not directly underneath the parent nav that the code is assigned to.

I really hope this is kinda easy to fix, fingers crossed! Thanks for reading this and trying to help, in advance!