Hi! Please give me a Feedback in my Markdown preview Project

After a nice time studying and improving my programming skills, I have finished The JavaScript and Frameworks Course, and I want to share my Markdown project. Can you please give me feedbacks from this project
Any corrections, opinions, hint, etc. Will be so helpful for me.

Thank you so much for your time !

This is the link: https://codepen.io/jefferson-tobon/full/pojYRBj

Hi @jeffer.tobon, it looks good but I noticed an issue on a smaller screen. Attaching a screenshot so you can see. It looks as though the background color doesn’t extend all the way.
And maybe just me but the font you chose for code portions is small and hard to read.