I sincerely apologize for the delay in responding back to you but I was little unwell hence the delay.
My reason for asking the website’s url is because of the nested HTML tags and the type of content in the Additional content section, the css code that will be working on my website might not work on yours.
“Which ID or class you are using to set the color of the font and hamburger.”
In the above line, do you refer to the menu items?
“I am asking because I want colors, sizes, etc. to change based on date/visitor criteria.”
And the above requirement isn’t possible with the css code.