Mortgage calculator with vanilla javascript

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

i am proud i could finish this project

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

i was finding it hard to get the formula for calculating mortgage but i watched a video on youtube and found a solution.

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

I would like to be able to change the border color of the inputs when focused.