Streaming live at 10am (PST)

Z-layer doesn't work, and the cart pop-up is under everything

I have tried changing the z-layer and changing the position, but it seems like this doesn’t work.
The bug happens when you open the cart.
Could someone help me?

Here is my site Read-Only: https://preview.webflow.com/preview/simplylights?utm_medium=preview_link&utm_source=designer&utm_content=simplylights&preview=11341076e3375bf3bd14f713da531418&mode=preview