Box Shadow Navbar when there is a page scroll

Hey there,

I am pretty new user of webflow. I would like to display a box-shadow when a user is scrolling the page not displaying at the initial state. I just need to create the animation, box shadow is ready. You can see the website here : https://lumpa-redesign.webflow.io/

How could I do that ?

Many thanks,

Jonathan


Here is my public share link: LINK
(how to access public share link)