I’m sure that I’m missing something simple, I’m having trouble with the GP header and primary navigation. As you can see in the video the menu looks like it is creating extra top padding/margin when the resolution below 1300px. When I’ve inspected the various elements though it isn’t paddings and margins that is doing this so it might be something to do with how the floats are being cleared.
I’ve posted a video here https://youtu.be/AVtoCzK5qeA