Multi-Step Form (SASS + Mobile-first + BEM + Vanilla JS)

I have just checked your project. You have done it very well.

Although you can improve some logic.

First, the Side navbar not changing to summary when going to the summary section. Add-ons remain. Try to solve it.

Secondly, in the summary section the total calculated amount is coming NaN (Not a Number).

Finally, try to add a favicon.

Best of luck.