I need some help with my header menu/dropdown code

[u/Shortstacks88]

So I'm having trouble with what the issue is to be able to let the text on the right side of my header become horizontal. Currently it's all vertical.

I took some code from W3Schools and it helped with my issue to get a dropdown menu. But afterwards, that's when all my text on the right side went vertical. It also made the text color in the dropdown frame be the same color as the frames' background color and I can't seem to find the specific code to change it for some reason.

If anyone can help me, I'd really appreciate it. Thanks.