Reusable php element overridden

Hello, so I’m having a problem with the navbar from the page.

As you can see, the navbar is behind the text of the page.

image.png1408×840 79.9 KB

This is the page code (the included php file is selected on blue), it’s also overridden:

image.png2036×1654 337 KB

This is my navbar code:

image.png2036×1654 428 KB