How do I style a border around the header section?

Hi there,

try adding this CSS:

.site-header {
    border: 2px solid #f00;
}

No change. Any other suggestions?

Try this:

.page-hero {
    border: 2px solid #f00;
}

That put a border around the page hero image, but not around the header above with site title and menu.

Oops - try this one:

#mobile-header {
    border: 2px solid #f00;
    box-sizing: border-box;
}

That's it! Thank you, David.

You're welcome - sorry for the brain freezes there :)