[css-align-3] Percentage gaps resolve against zero for intrinsic size contribution, resolve against containing block during layout. #509

Author: fantasai

css-align-3/Overview.bs

@@ -1836,11 +1836,11 @@ Row and Column Gutters: the 'row-gap' and 'column-gap' properties</h3>
 			see subsections below for details.
 
 			Negative values are invalid.
-			Percentages resolve to zero
-			when specified against a content-based size
-			(such as the <a>logical width</a> of a float
-			or the ''height/auto'' <a>logical height</a>
-			of a <a>block-level</a> <a>grid container</a>).
+			<a href="https://www.w3.org/TR/css-sizing-3/#percentage-sizing">As in the min size properties and margins/paddings</a> [[CSS-SIZING-3]],
+			percentages resolve against zero
+			for determining intrinsic size contributions,
+			but resolve against the box’s content box
+			when laying out the box’s contents.
 
 		: <dfn>normal</dfn>
 		:: The ''gap/normal'' represents