I was able to update the style.css file via FTP, thank you 🙂
On to the next issue:
The size of the text of the main menu has become smaller after the update. I assume this is related to style as well.
Live site (4.6.0):
Staging site (6.0.3):
I have changed some of the elements of the main menu so please disregard the content itself. I haven’t touched the font size.
In general, how can I control the size as well as the spacing?