I am trying to reproduce this download button appearance from Mailbox site when scrolling down the page: http://www.mailboxapp.com/
Here is my website: http://nexcafe.webflow.com/ (the public link to webflow: https://webflow.com/design/nexcafe?preview=cc00b0157e5389c92fbf95e9b54f9a75)
I believe I am quite close, but can't make is "smooth" as on the Mailbox site. I tried using the transition feature but it only works on the first load and only on the self object.
Could someone help me here?