I’m having a similar but slightly different issue. I’m currently only seeing a sliver of my header image, though it is showing full width. I copied in the CSS you included above, and it just moved the picture “up”. Now, instead of the top of the image showing, the bottom does. Including a pic for reference.
How can I adjust this to show the entire image between the header bar and near the tops of the featured links.
Also, any thoughts on why the featured icons keep switching from the icons I chose to those squares? Is it a sizing/scaling issue?