Navigation: styles for textDecoration on nav links are too specific

[mikachan]

Description

The following CSS for handling textDecoration on navigation block links is too specific:

.wp-block-navigation:where(:not([class*=has-text-decoration])) a

This prevents links inside the navigation block from being underlined by default. However, this should not take precedence if we set the global links to be underlined.

Step-by-step reproduction instructions

Add the following to a theme.json file, under styles.elements.link.typography:

"styles": {
	"elements": {
	        "link": {
		        "typography": {
			        "textDecoration": "underline"
		        }
	        }
	}
}

Screenshots, screen recording, code snippet

This is the CSS applied to a navigation link with the above theme.json settings:

Environment info

WP 6.0.1, latest GB trunk

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes