You still haven’t fixed half the problems from the last time you posted into codepen.
You have list items (li) that have closing tags but no opening tags.
Your list items have to be in unordered lists (ul) which they aren’t.
It’s a mess and not something I really want to deal with. If you don’t fix these fundamental errors you are going to run into major issues later on.
I would concentrate on proper semantic and validated code before worrying about enhanced “effects”.
As for your specific problem, a 1px black shadow on a black font isn’t going to make that much difference (and will look weird). Try changing the text shadow color to red.
Then you will see it.