Styling `:focus-within` on `<details>`

[geoffrey-eisenbarth]

Currently tabbing to a <details> does not show the usual :focus-within outline (technically, tabbing to the <summary>)

This could be fixed with

details:has(summary:focus-within) {
  border-color: var(--accent);
  outline: .2em solid var(--accent);
}

[geoffrey-eisenbarth]

Note the existing code is

summary:focus-visible { outline: none }

so there might need to be some discussion