Issue with Collapsible Radix Component

Hi everyone! 👋

I'm working on a project and facing two technical issues that I could use some help with:

1. There's a jump/shift that occurs when closing a Radix UI collapsible component
2. My sidebar is initially visible on page load and then disappears when the page finishes loading on screens under 991px. I'd prefer it to be hidden by default on these screen sizes

Has anyone encountered similar issues or have suggestions on how to fix these? Any help would be greatly appreciated!

Here's the link : https://liam-grosjean.wstd.io/
Here's the read-only link : https://p-e8e38a54-e4df-40b6-856d-41b5996d97d7.apps.webstudio.is/?authToken=794ef213-fb3f-4f5d-b37e-ef271bdad2de&mode=preview

Thanks!