When I reduce the width of the screen, the header links (expectedly) turn into a vertical column.
I'm having two issues with my code:
1) I can't get the background of the header to extend with the links, so they end up dangling over the jumbotron picture.
2) There is a bit of blue to the left of 'Adoptly' that won't disappear when the screen size is reduced.
Here is a link to my pen (i've never done this before so I hope it works!)