Navigation Menu Appearing Transparent with Transparent Header

Hi there,

I have had a big look but cannot seem to resolve my issue. I like the headers 1 and 5 for their format. But on the home page (until scroll down) they appear as transparent. The actual menu navigation links are still there, as you can highlight them, and click them, you just cannot see them until you scroll down.

I would just like to make these navigation links fixed (or appearing, rather then totally transparent) as per how they appear in the demos. Can you please let me know what I need to do to get that?

Screenshots:
1. How home page appears: https://i.imgur.com/1NyCCLi.png
2. Transparent navigation menu: https://i.imgur.com/hjklfOO.png
3. Menu only becomes visible when you scroll: https://i.imgur.com/paD7OPj.png

I hope that makes sense.

Thanks kindly,
Bek

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