Responsive landing page using html and css

What are you most proud of, and what would you do differently next time?

I was able to do without depending too much on google.

What challenges did you encounter, and how did you overcome them?

Putting a text at the center, I did put in the code for that but it does not work.

What specific areas of your project would you like help with?

For now, It is putting the text at the center because this (text-align: center) is not working.