From 03e8407e405761e68549f5b2b61f27d096817441 Mon Sep 17 00:00:00 2001
From: Minseong Kim <jja08111@gmail.com>
Date: Wed, 18 Feb 2026 22:36:17 +0900
Subject: [PATCH] [css-lists-3] Update algorithm for initial counter value in
 reversed list

---
 css-lists-3/Overview.bs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/css-lists-3/Overview.bs b/css-lists-3/Overview.bs
index 4c51068fcf35..d360e743d91a 100644
--- a/css-lists-3/Overview.bs
+++ b/css-lists-3/Overview.bs
@@ -1148,7 +1148,7 @@ Instantiating Counters</h4>
 
 	1. Let |num| be 0.
 
-	2. Let |first| be true.
+	2. Let |lastNonZeroIncrementNegated| be 0.
 
 	3. For each element or pseudo-element |el| that increments or
 		sets the same counter in the same [=scope=]:
@@ -1156,9 +1156,8 @@ Instantiating Counters</h4>
 		1. Let |incrementNegated| be |el|'s 'counter-increment' integer value for this counter,
 			multiplied by -1.
 
-		2. If |first| is true,
-			then add |incrementNegated| to |num| and
-			set |first| to false.
+		2. If |incrementNegated| is not zero,
+			then set |lastNonZeroIncrementNegated| to |incrementNegated|.
 
 		3. If |el| sets this counter with 'counter-set',
 			then add that integer value to |num| and
@@ -1166,7 +1165,9 @@ Instantiating Counters</h4>
 
 		4. Add |incrementNegated| to |num|.
 
-	4. Return |num|.
+	4. Add |lastNonZeroIncrementNegated| to |num|.
+
+	5. Return |num|.
 
 	Note: Only [=reversed=] counters can be instantiated without an initial value.