Want to get rid of thin line on Bootstrap navbar

Question

I have a Bootstrap navbar which creates a thin line when I expand it by clicking the mobile button. I can't figure out what part of the CSS I have to change to get rid of it. Can anyone help?

Here is a link to my site

Answer 1

It's the box-shadow property on #myNavbar. The following rule will fix it.

#myNavbar {
  box-shadow: none;
}