Shadow-box Test

Add a class shadow-box with {: .shadow-box }

With shadow-box

![](https://user-images.githubusercontent.com/68011645/89026666-ad3a8680-d35b-11ea-9f4b-d3fe26ae12ed.png){: .shadow-box }

Without shadow-box

![](https://user-images.githubusercontent.com/68011645/89026666-ad3a8680-d35b-11ea-9f4b-d3fe26ae12ed.png)