@nelsonbernard
Posted
Congratulations on finishing the challenge! In response to your question, it is indeed a box-shadow and very easy to implement. In case you're unfamiliar, here's a good article on box shadows in css.
You can just add it to your panel class. Most shadows just use black for the color and adjust the transparency using an rgba value like so:
.panel{ box-shadow: 0px 10px 10px rgba(0, 0, 0, 0.5); }
box-shadow: [horizontal offset] [vertical offset] [blur radius] [color];
Hope that helps!