debug.css

/*
 * (*outer|center|inner)
 */
[inner ], [inner ] * { outline-offset: -0.3750rem !important; }
[center], [center] * { outline-offset: -0.1875rem !important; }
[outer ], [outer ] * { outline-offset:  0.0000rem !important; }

/*
 * debug:(*|outline|\*)
 */
[debug             ] [outline],
[debug\:outline    ] [outline],
[debug\:\*         ] *        ,
[debug\:one        ] {
	outline: 0.3750rem solid #00AAFF3F !important;
}

/*
 * line-height
 */
[debug             ] [line-height],
[debug\:line-height] [line-height],
[debug\:\*         ] [line-height] {
	background-image: linear-gradient(
		#00AAFF7F   1px,
		transparent 0,
		transparent calc(var(--lh)*1em/2),
		#00AAFF3F   calc(var(--lh)*1em/2),
		transparent calc(var(--lh)*1em/2 + 0.5px),
		transparent calc(var(--lh)*1em)
	) !important;
	background-size: 100% calc(var(--lh)*1em) !important;
	box-shadow:      0 1px #00AAFFAA          !important;
}