Fix perspective in Firefox and Chrome

[mattaningram]

#87

https://bugzilla.mozilla.org/show_bug.cgi?id=1734999

Change to Firefox and Chrome apparently broke how perspective works.

[mattaningram]

This appears to work: https://deploy-preview-88--animxyz.netlify.app/

Edit: Never mind, breaks Safari. Looking into it further.

[xxSkyy]

I think it's better to merge it for Firefox & Chrome proper functionality and Safari will catch up soon in updates as in Technical Preview it already works as should.

[mattaningram]

@xxSkyy That might be what we end up doing, but people don't update Safari as readily and on iOS it only updates when you update overall system so I want to see if there is a temporary solution we can use that will support old and new versions.

Someone here suggested using @supports (transform: perspective(none)) to more specifically target the variable default so I will look into that today.