CSS Coloring Changes

I need help with a few CSS things.

ALL MOBILE version only – https://www.semaystudio.com

1-I would like the 3 line menu bar to have white lines (not black).
2-I would like this menu background to be white and the text/sub text to be black
3-I would like a thin white bar below my social media header bar

I have a maintenance page up. I will deactivate after a reply as I don’t want the site live for long.

Thanks,
Bella