Losing some visual features when deployed to heroku using rails

It looks normal and good in development…

This is what it looks like in production:

Please tell me what is happening

The production app is at:

https://floating-everglades-18350.herokuapp.com/

Note: All of the backend works properly, it is just the styling that seems to be losing features

Hello Aneesh,
In order, I could reproduce the issue locally, please fill in the snippet with your code.