3column-preview-card-component (Bootstrap, Animate.css)

To be honest I did not have much difficulty but I would say the resolution part was a bit difficult for me.

I am unsure of the cleanliness of the code since there are IDs or classes that were different while they could've been the same and would have saved up space however I have tried to use the same ID for the same code or the same class but I experienced issues with the hover states like #learnmore.

Questions:

How to make my site way more responsive?

What frameworks other than Bootstrap would you suggest for a effective and a functional website?