3-Column-Preview-Card

In this challenge, I have learned below mentioned points :

1. Flexbox container center - When trying to analyze how I can make my card in center, I have learned that height element is the key property without this, unable to center the card in page.

2. Until the last project, I am always using the codepen for the challenges which seems to be very cool but I realise that if I really want to learn front-end, I have to start using VScode, Netlify and Github repository frequently which helps me to understand the day to day challenges.

Also, It will be really appreciate if I could get an advise on how to use BEM in a betterway and last, let me know what I am doing wrong.