Why is nav not selected?

Question

This is a code I created. I am trying to make the nav bar a set height, but nothing I do to the CSS changes the nav height or color. I am specifically trying to set a background color for the nav and set a min height for the nav bar.

Please note I have made things similiar to this before, so that is why I am so confused.
https://code.sololearn.com/WMP74Q9oeCPc/?ref=app

Answer 1

Tim Palmer
Use "px" instead of "%"

nav {
height:50px;
width:100%;
}