Focus Visible Enhanced: greater than or equal to a 1 CSS pixel border

Hi Alastair / all,

Today I got some interesting feedback on the first criteria for focus
enhanced.

*- Minimum area: The focus indication area is greater than or equal to a
1 CSS pixel border of the focused control.*

This was interpreted as the CSS border property width (1px), and not the
"circumference".

So when you have a button of 120 x 40 px, a border-right of 1 CSS px would
be fine.

button:focus {
  border-right: 1px solid black;
}

IF, as I understood it, the circumference is ment, we probably need / want
to change it.

Cheers,
Jake