Haskell, GTK and CSS Theming (Give Your Apps Style!)

In a two previous videos, I created a very simple GTK app using Haskell. In the first video, I created the app (which I named "byebye") in 30 minutes and I wrote it in such a way as to be as "gentle" an introduction to Haskell and GTK as I could be. In a second video, I refactored the code so it would be less lines and cleaner code. In this third video, I adding some new functionality to "byebye", namely the ability to read a config file and the ability to use CSS for theming.

REFERENCED: ► https://www.youtube.com/watch?v=ViW-bcNQ6Lc - First Video (Creating "byebye") ► https://www.youtube.com/watch?v=rD8VywH2gCs - Second Video (Refactoring "byebye") ► https://gitlab.com/dwt1/byebye - The source code for ByeBye

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