@@ -141,6 +143,10 @@ Exposing custom state: the '':state()'' pseudo-class
 	whose [=states set=] contains a string
 	that [=string/is=] the selector's argument's value.
 
+	
+		parsing/parse-state.html
+	
+
 	
 
@@ -201,6 +207,11 @@ Heading Structures: the heading pseudo-classes '':heading'', and '':heading()''<
 	type selector. Thus, a selector ''h1:heading(3)'' matches any
 	''h1'' tag which has an exposed heading level of 3.
 
+	
+		heading.html
+		parsing/parse-heading.html
+	
+
 

 Combinators
 

From 7b8747365329ad61e34abd0211fd4eaa15b87490 Mon Sep 17 00:00:00 2001
From: Sebastian Zartner 
Date: Tue, 28 Oct 2025 21:45:34 +0100
Subject: [PATCH 068/124] [selectors-5][editorial] Marked as delta spec

---
 selectors-5/Overview.bs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/selectors-5/Overview.bs b/selectors-5/Overview.bs
index 46f7e9cbbe9..036ed686b07 100644
--- a/selectors-5/Overview.bs
+++ b/selectors-5/Overview.bs
@@ -4,6 +4,7 @@ Group: CSSWG
 Shortname: selectors
 Level: 5
 Status: ED
+!Delta Spec: yes
 Work Status: Exploring
 ED: https://drafts.csswg.org/selectors-5/
 TR: https://www.w3.org/TR/selectors-5/

From 843313d1470211627af8d0451243caaae95f6101 Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Wed, 15 Jan 2025 14:15:38 -0800
Subject: [PATCH 069/124] [css-align-3] Gloss in-flow/out-of-flow jargon

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

diff --git a/css-align-3/Overview.bs b/css-align-3/Overview.bs
index d565c21017f..db84332e038 100644
--- a/css-align-3/Overview.bs
+++ b/css-align-3/Overview.bs
@@ -2252,8 +2252,8 @@ Determining the Baselines of a Box
 		
block containers
 		

 			The first/last [=baseline set=] of a block container
-			is taken from the first/last in-flow line box in the block container
-			or the first/last in-flow block-level child in the block container
+			is taken from the first/last [=in-flow=] line box in the block container
+			or the first/last [=in-flow=] block-level child in the block container
 			that contributes a set of first/last baselines,
 			whichever comes first/last.
 			If there is no such line box or child,
@@ -2349,7 +2349,7 @@ Determining the Baselines of a Box
 			and ''vertical-rl'' if 'direction' is ''rtl''.
 
 	For the purposes of finding the baselines of a box,
-	it and all its in-flow descendants with a scrolling mechanism (see the 'overflow' property)
+	it and all its [=in-flow=] descendants with a scrolling mechanism (see the 'overflow' property)
 	must be considered as if scrolled to their initial scroll position.
 	Additionally,
 	if the position of a [=scroll container=]’s first/last baseline

From 4ffbd11c04e85f725ae2c7deca35846f528eeea5 Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Tue, 28 Oct 2025 14:13:08 -0700
Subject: [PATCH 070/124] [css-inline-3][editorial] Hyperlink instance of
 "in-flow" jargon

---
 css-inline-3/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-inline-3/Overview.bs b/css-inline-3/Overview.bs
index 09b50fa9f98..3f9fccba981 100644
--- a/css-inline-3/Overview.bs
+++ b/css-inline-3/Overview.bs
@@ -2837,7 +2837,7 @@ Interaction with Fragmentation (Pagination)
 	for the purpose of block-axis fragmentation
 	(breaking across pages, columns, regions, etc.).
 	Additionally,
-	breaks between the in-flow lines alongside an initial letter box
+	breaks between the in-flow lines alongside an initial letter box
 	are avoided,
 	much as breaks between line boxes affected be 'widows' and 'orphans'
 	are avoided.

From 826179342a4a729b28734e855ce327633de8ef59 Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Tue, 28 Oct 2025 12:09:24 -0700
Subject: [PATCH 071/124] [css-overflow-3] Gloss in-flow/out-of-flow jargon

---
 css-overflow-3/Overview.bs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/css-overflow-3/Overview.bs b/css-overflow-3/Overview.bs
index 02e31869d1d..b5fc7205cfb 100644
--- a/css-overflow-3/Overview.bs
+++ b/css-overflow-3/Overview.bs
@@ -277,11 +277,11 @@ Scrollable Overflow
 			within the [=scrollable overflow rectangle=],
 			the box’s own padding
 			so that when its content is scrolled to its end,
-			there is padding between the edge of its in-flow (or floated) content
+			there is padding between the edge of its [=in-flow=] (or floated) content
 			and the border edge of the box.
 			It typically ends up being exactly the same size as the box's own padding,
 			except in a few cases--
-			such as when an out-of-flow positioned element,
+			such as when an [=out-of-flow=] positioned element,
 			or the visible overflow of a descendent,
 			has already increased the size of the [=scrollable overflow rectangle=]
 			outside the conceptual “content edge” of the [=scroll container=]’s content.

From adae408d8b3cd762a9ef79445e651d2e7cb0227f Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Tue, 28 Oct 2025 14:34:16 -0700
Subject: [PATCH 072/124] [css-backgrounds-4][editorial] Gloss in-flow jargon

---
 css-backgrounds-4/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-backgrounds-4/Overview.bs b/css-backgrounds-4/Overview.bs
index 735dbeb1bfb..e531fa07a8b 100644
--- a/css-backgrounds-4/Overview.bs
+++ b/css-backgrounds-4/Overview.bs
@@ -1035,7 +1035,7 @@ Painting Area: the 'background-clip' property
 		

 			The background is painted within (clipped to)
 			the intersection of the border box
-			and the geometry of the text in the element and its in-flow and floated descendants.
+			and the geometry of the text in the element and its [=in-flow=] and floated descendants.
 
 		
border-area
 		


From 24f6a8e972ff5c6bd45a827ad26e28304245e06c Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Wed, 29 Oct 2025 00:05:19 -0700
Subject: [PATCH 073/124] [css-page-floats-3][editorial] Gloss out-of-flow
 jargon (#13032)

---
 css-page-floats-3/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-page-floats-3/Overview.bs b/css-page-floats-3/Overview.bs
index 454743b8845..d4af66b13a8 100644
--- a/css-page-floats-3/Overview.bs
+++ b/css-page-floats-3/Overview.bs
@@ -994,7 +994,7 @@ Differences between inline floats and absolutely positioned elements
   This section is not normative.
 
   

-    Inline floats and absolutely positioned elements are both out-of-flow elements.
+    Inline floats and absolutely positioned elements are both out-of-flow elements.
     Absolutely positioned elements that are also exclusions can imitate many of
     the features of floats.
 

From a735b158dcc3667ad01ffbbf79a015d1a4413f35 Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Wed, 29 Oct 2025 00:06:36 -0700
Subject: [PATCH 074/124] [css-text-4][editorial] Gloss out-of-flow jargon
 (#13030)

---
 css-text-4/Overview.bs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/css-text-4/Overview.bs b/css-text-4/Overview.bs
index 12c476187ce..f7b418cf494 100644
--- a/css-text-4/Overview.bs
+++ b/css-text-4/Overview.bs
@@ -7950,7 +7950,7 @@ Hyphenation Control: the 'hyphens' property
 	For the purpose of the 'hyphens' property,
 	what constitutes a “word” is UA-dependent.
 	However, inline element boundaries
-	and out-of-flow elements
+	and [=out-of-flow=] elements
 	must be ignored when determining word boundaries.
 
 	
@@ -13189,7 +13189,7 @@ Word and Phrase Detection
 
 		

 			Inline box boundaries
-			and out-of-flow elements must be ignored
+			and [=out-of-flow=] elements must be ignored
 			when determining word or phrase boundaries.
 			However,
 			if a [=word boundary|word=] or [=phrase boundary=] is found at the same position as

From 3cf6a36d1b188f7454755b90f6adde625141617c Mon Sep 17 00:00:00 2001
From: Chris Lilley 
Date: Wed, 29 Oct 2025 17:28:32 -0400
Subject: [PATCH 075/124] [css-color-hdr] Remove mention of SMPTE-ST-2094-50 
 as justification for eps #12873 #11788

---
 css-color-hdr-1/Overview.bs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/css-color-hdr-1/Overview.bs b/css-color-hdr-1/Overview.bs
index e3b63c8fc41..0888c8a21d3 100644
--- a/css-color-hdr-1/Overview.bs
+++ b/css-color-hdr-1/Overview.bs
@@ -652,8 +652,7 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 		Let cxyz[i] = pow(c1xyz[i] + eps, w1 ) * pow(c2xyz[i] + eps, w2 ) - eps
 
 	Note: The factor eps is to prevent division by zero,
-	and the value is chosen to match that used in
-	[[SMPTE-ST-2094-50]].
+	and is particularly important when interpolating with SDR colors near to black.
 
 	
 	


From b50c63b806d292b6513286a0a450b228f6382c23 Mon Sep 17 00:00:00 2001
From: Chris Lilley 
Date: Wed, 29 Oct 2025 17:37:14 -0400
Subject: [PATCH 076/124] [css-color-hdr][editorial] Update changes

---
 css-color-hdr-1/Overview.bs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/css-color-hdr-1/Overview.bs b/css-color-hdr-1/Overview.bs
index 0888c8a21d3..933a3b55a49 100644
--- a/css-color-hdr-1/Overview.bs
+++ b/css-color-hdr-1/Overview.bs
@@ -1869,10 +1869,28 @@ in a user stylesheet.
 	
 
 

+	
+	
Removed mention of SMPTE-ST-2094-50  as justification for eps
+		(#12873, 
+		#11788)
+	
+	
Noted similarity of hdr-color to adaptive gain curves
+	
Added alpha() RCS to color syntax
+		#10689
+	
+	
Added display-p3-linear to color spaces for interpolation
+		(#12596)
+	
+	
Added a couple of deltaE ITP worked examples
+		(#11250)
+	
+	
Added display-p3-linear colorspace
+		(#12596)
+	
 	
 	
Added the clamp function which is used in  hdr-color() 
 	
Added sample code for hdr-color()
-	
Explained where the eps factor comes from, and what it is for 
+	
Explained what the eps factor is for 
 		(#11788)
 	
Added second color-hdr() worked example
 	
Defined the term "Absolute D65 CIE XYZ"

From 5accfe688f402d1ffbf1c88b6cd4b4fa1a9da134 Mon Sep 17 00:00:00 2001
From: Sebastian Zartner 
Date: Wed, 29 Oct 2025 23:48:39 +0100
Subject: [PATCH 077/124] [css-text-decor-4][editorial] Fixed Bikeshed issues

---
 css-text-decor-4/Overview.bs | 184 ++++++++++++++++++++---------------
 1 file changed, 107 insertions(+), 77 deletions(-)

diff --git a/css-text-decor-4/Overview.bs b/css-text-decor-4/Overview.bs
index 5795328a390..7a936902d0b 100644
--- a/css-text-decor-4/Overview.bs
+++ b/css-text-decor-4/Overview.bs
@@ -15,10 +15,11 @@ Abstract: This module contains the features of CSS relating to text decoration,
 

+spec:css-backgrounds-3; type:property; text:box-shadow
 spec:css-text-3; type:dfn; text:character
 spec:fill-stroke-3; type:property;
-    text: fill
-    text: stroke
+	text: fill
+	text: stroke
 

@@ -153,7 +154,10 @@ Line Decoration: Underline, Overline, and Strike-Through

-                  <div>Help, help! <span>I am under a hat!</span></div>
+			<div>Help, help! <span>I am under a hat!</span></div>
 		

over lines @@ -465,7 +472,10 @@ Determining the Position and Thickness of Line Decorations Using the same example, a line-through would in the second fragment, instead of averaging the two font sizes, split the line-through into two segments: -

+

In both cases, however, the superscript, due to the vertical-alignment shift, has no effect on the position of the line. @@ -559,11 +569,13 @@ Text Underline Position: the 'text-underline-position' property

+ alt="In a typical Latin font, the underline is positioned slightly + below the alphabetic baseline, leaving a gap between the line + and the bottom of most Latin letters, but crossing through + descenders such as the stem of a 'p'." + src="images/underline-position-alphabetic.png" + width="231" + height="61">

A typical “alphabetic” underline is positioned just below the alphabetic baseline

@@ -585,7 +597,9 @@ Text Underline Position: the 'text-underline-position' property + src="images/underline-position-under.png" + width="405" + height="68">

''text-underline-position: under''

@@ -628,13 +642,17 @@ Text Underline Position: the 'text-underline-position' property + src="images/underline-position-left.png" + width="40" + height="168"> + src="images/underline-position-right.png" + width="40" + height="168"> ''text-underline-position/left'' @@ -774,10 +792,14 @@ Text Decoration Line Uniformity

+ alt="A single underline drawn under varying font sizes and vertical positions must be a single line." + width="125" + height="81"> vs. + alt="Drawing multiple line segments, each with the position and thickness appropriate to the decorated text, is incorrect." + width="120" + height="80">

Correct and incorrect rendering of <u>A<sup>B</sup><big>C</big>D</u>

@@ -794,8 +816,8 @@ Text Decoration Line Uniformity UA consideration of descendant content will therefore result in better typography.

- - + +

Due to the central baseline alignment of vertical text, a left-side underline on small vertical text will cut through the text @@ -821,8 +843,10 @@ Text Decoration Line Uniformity

+ alt="An underline for just the superscript 'st' in '1st' is drawn just below the superscript, + whereas an underline for the entire text is drawn at the appropriate position for full-size text." + width="80" + height="38">

Example of underline applied to superscripted text vs. underline applied to text containing a superscript +

Altered the border-radius outset adjustment, + so the radius reduction factor in the + minimum radius percentage of the corner, makes it less pronounced + the closer the corner's border-radius gets to 50%. + (Issue 7103) +

+

Fixed syntax of 'box-shadow' to avoid allowing negative blur radii, + aligning it with the prose. +

Cross linked to 'ink overflow' terminology

+ +

Changes since the 14 February 2023 Candidate Recommendation Snapshot

@@ -3687,8 +3703,6 @@ Changes since the 14 February 2023 Candidate Recommendation Snapshot [=CSS/value definition syntax=].

Fixed the definition for where box shadows apply. (Issue 9286) -

Fixed syntax of 'box-shadow' to avoid allowing negative blur radii, - aligning it with the prose. From 24679bb9f4df1c58f2ae8ec474c02f4fade7743b Mon Sep 17 00:00:00 2001 From: Chris Lilley Date: Wed, 5 Nov 2025 14:25:35 -0500 Subject: [PATCH 095/124] [css-backgrounds-3][editorial] link defaults --- css-backgrounds-3/Overview.bs | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/css-backgrounds-3/Overview.bs b/css-backgrounds-3/Overview.bs index e0a0739ca2a..2c451d0b7f5 100644 --- a/css-backgrounds-3/Overview.bs +++ b/css-backgrounds-3/Overview.bs @@ -36,6 +36,10 @@ spec:css-color-4; type:value; text:transparent spec:selectors-3; type:selector; text: ::first-letter spec:selectors-3; type:selector; text: ::first-line spec:css-values-3; type:type; text: +spec:html; type:element; text:body +spec:css-sizing-3; type:dfn; text:size +spec:css-sizing-3; type:dfn; text:width +spec:css-sizing-3; type:dfn; text:height

Introduction

From 761f47189f0bcccb6c2cdcbeff7d6fb9365c3db4 Mon Sep 17 00:00:00 2001 From: Chris Lilley Date: Wed, 5 Nov 2025 14:38:04 -0500 Subject: [PATCH 096/124] [css-backgrounds-4][editorial] update wpt --- css-backgrounds-3/Overview.bs | 39 +++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/css-backgrounds-3/Overview.bs b/css-backgrounds-3/Overview.bs index 2c451d0b7f5..ec1bb2221e8 100644 --- a/css-backgrounds-3/Overview.bs +++ b/css-backgrounds-3/Overview.bs @@ -951,8 +951,28 @@ Painting Area: the 'background-clip' property background-clip-color.html background-clip-content-box-001.html background-clip-content-box-002.html + background-clip-content-box-with-border-radius-002.html + background-clip-content-box-with-border-radius-003.html + background-clip-padding-box-with-border-radius-002.html + background-clip-padding-box-with-border-radius-003.html background-clip-padding-box-001.html background-clip-padding-box-with-border-radius.html + background-clip/clip-border-area-background-geometry.html + background-clip/clip-border-area-border-image.html + background-clip/clip-border-area-border-on-top.html + background-clip/clip-border-area-box-decoration-break.html + background-clip/clip-border-area-multiple-backgrounds.html + background-clip/clip-border-area-on-body-not-propagated-to-root.html + background-clip/clip-border-area-on-body-propagated-to-root.html + background-clip/clip-border-area-on-root.html + background-clip/clip-border-area.html + background-clip/clip-text-ellipsis.html + background-clip/clip-text-on-body-not-propagated-to-root.html + background-clip/clip-text-on-body-propagated-to-root.html + background-clip/clip-text-on-root.html + background-clip/clip-text-out-of-flow-child.html + background-clip/clip-text-text-decorations.html + background-clip/clip-text-text-emphasis.html background-clip/clip-rounded-corner.html background-clip/clip-text-animated-text.html background-clip/clip-text-dynamic-2.html @@ -2459,6 +2479,13 @@ Corner Shaping calculates its radius by adding the corresponding margin thickness to each border radius, with the corresponding [=outset-adjusted border radius=] applied. + + background-clip-content-box-with-border-radius-002.html + background-clip-content-box-with-border-radius-003.html + background-clip-padding-box-with-border-radius-002.html + background-clip-padding-box-with-border-radius-003.html + +

When expanding an [=edge=] that has a [=border radius=], e.g. for computing the [=margin edge=], 'box-shadow' spread, or 'overflow-clip-margin', @@ -2762,6 +2789,11 @@ Border Images

+ + border-image-021.html + border-image-outset-004.html + +

Image Source: the 'border-image-source' property

@@ -3570,6 +3602,10 @@ Shadow Shape, Spread, and Knockout The 'border-image' does not affect the shape of the box-shadow. + + box-shadow-radius-generated.html + +

Blurring Shadow Edges

@@ -4158,4 +4194,7 @@ Changes Since the 17 December 2009 Candidate Recommendation color-mix-currentcolor-outline-repaint-parent.html color-mix-currentcolor-outline-repaint.html first-letter-space-not-selected.html + animations/background-color-animation-custom-property.html + animations/background-color-animation-custom-timing-function-reverse.html + animations/background-color-animation-custom-timing-function.html From e5af44169bc576a6885faec0b8dffe8c9e05b603 Mon Sep 17 00:00:00 2001 From: Chris Lilley Date: Wed, 5 Nov 2025 14:52:56 -0500 Subject: [PATCH 097/124] [css-backgrounds-4][editorial] Bert Bos no longer in CSSWG, moved to former editor --- css-backgrounds-4/Overview.bs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/css-backgrounds-4/Overview.bs b/css-backgrounds-4/Overview.bs index db33780f628..5b69bb85dd9 100644 --- a/css-backgrounds-4/Overview.bs +++ b/css-backgrounds-4/Overview.bs @@ -6,10 +6,10 @@ Status: ED Work Status: Exploring Group: csswg ED: https://drafts.csswg.org/css-backgrounds-4/ -Editor: Bert Bos, W3C, bert@w3.org, w3cid 3343 Editor: Elika J. Etemad / fantasai, Apple, http://fantasai.inkedblade.net/contact, w3cid 35400 Editor: Lea Verou, Invited Expert, http://lea.verou.me/about/, w3cid 52258 Editor: Sebastian Zartner, Invited Expert, sebastianzartner@gmail.com, w3cid 64937 +Former Editor: Bert Bos, W3C, bert@w3.org, w3cid 3343 Abstract: This module contains the features of CSS relating to the backgrounds of boxes on the page. Ignored Vars: width of background positioning area, width of background image, height of background positioning area, height of background image, X' Ignored Terms: total width From 458ecc15bad8a70c1819c338ff8750aeab8c8c3b Mon Sep 17 00:00:00 2001 From: Sebastian Zartner Date: Wed, 5 Nov 2025 14:28:23 +0100 Subject: [PATCH 098/124] [css-backgrounds-4][editorial] Removed the "Not Ready For Implementation" status --- css-backgrounds-4/Overview.bs | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/css-backgrounds-4/Overview.bs b/css-backgrounds-4/Overview.bs index 5b69bb85dd9..839fff93c8b 100644 --- a/css-backgrounds-4/Overview.bs +++ b/css-backgrounds-4/Overview.bs @@ -15,7 +15,6 @@ Ignored Vars: width of background positioning area, width of background image, h Ignored Terms: total width WPT Path Prefix: css/css-backgrounds/ WPT Display: closed -Warning: Not Ready

@@ -1637,6 +1636,16 @@ Sizing Images: the 'background-size' property
 

 Background Image Layers: the 'background-tbd' shorthand property
 
+	

+		
Not Ready For Implementation
+		

+		This section is not yet ready for implementation.
+		It exists in this repository to record the ideas and promote discussion.
+		

+		Before attempting to implement anything of this section,
+		please contact the CSSWG at www-style@w3.org.
+	
+
 	
 		Name: background-tbd
 		Value: <>#

From dd8e1be0b2dec35f3a5d3d8bb44570a92c831643 Mon Sep 17 00:00:00 2001
From: Callum Law 
Date: Mon, 15 Sep 2025 21:25:06 +1200
Subject: [PATCH 099/124] [css-text-decor-3] Update text-shadow syntax to
 disallow negative blur radius

The first two length values for `text-shadow` (x and y offsets) are allowed to be negative but the third value (blur) is not.

This behaviour is respected in all major browsers and is tested in WPT, see the second test here: http://wpt.live/css/css-text-decor/text-shadow/parsing/text-shadow-invalid.html
---
 css-text-decor-3/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-text-decor-3/Overview.bs b/css-text-decor-3/Overview.bs
index f7e622f2026..cae11cf23cf 100644
--- a/css-text-decor-3/Overview.bs
+++ b/css-text-decor-3/Overview.bs
@@ -861,7 +861,7 @@ Text Shadows: the 'text-shadow' property
 
 	
 	Name: text-shadow
-	Value: none | [ <>? && <>{2,3} ]#
+	Value: none | [ <>? && [ <>{2} <>? ] ]#
 	Initial: none
 	Applies to: text
 	Inherited: yes

From 091a21b3a16a70d41f4cf902995dff2cdd379a30 Mon Sep 17 00:00:00 2001
From: zhangenming <282126346@qq.com>
Date: Wed, 3 Sep 2025 14:57:39 +0800
Subject: [PATCH 100/124] Update Overview.bs

---
 css-align-3/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-align-3/Overview.bs b/css-align-3/Overview.bs
index db84332e038..3e73b0e7fa3 100644
--- a/css-align-3/Overview.bs
+++ b/css-align-3/Overview.bs
@@ -1961,7 +1961,7 @@ Block-Axis (or Cross-Axis) Default Alignment: the 'align-items' property
 
 	
 	Name: align-items
-	Value: normal | stretch | <> | [ <>? <> ]
+	Value: normal | stretch | <> | <>? <>
 	Initial: normal
 	Applies to: all elements
 	Inherited: no

From ca237a6cc0479b8b1546cd14de405208fb5c3b92 Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Fri, 17 Jan 2025 22:22:54 -0800
Subject: [PATCH 101/124] [css-display-4] Gloss in-flow/out-of-flow jargon

---
 css-display-4/Overview.bs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/css-display-4/Overview.bs b/css-display-4/Overview.bs
index e45e6a5aa61..f4b3f780698 100644
--- a/css-display-4/Overview.bs
+++ b/css-display-4/Overview.bs
@@ -1176,7 +1176,7 @@ Automatic Box Type Transformations
 		so that it remains a block container.
 
 	* If an [=inline box=] (''inline flow'') is inlinified,
-		it recursively inlinifies all of its in-flow children,
+		it recursively inlinifies all of its in-flow children,
 		so that no block-level descendants
 		break up the inline formatting context in which it participates.
 
@@ -2031,7 +2031,7 @@ Run-In Layout
 	
 
 	A run-in sequence is a maximal sequence of consecutive sibling run-in boxes
-	and intervening white space and/or out-of-flow boxes.
+	and intervening white space and/or out-of-flow boxes.
 
 	Note: This statement implies that out-of-flow boxes are reparented
 	if they are between two run-in boxes.
@@ -2462,7 +2462,7 @@ Appendix A: Glossary
 			that form an ancestor-descendant chain
 			through the containing block relation.
 			For example, an inline box’s containing block is the content box of its closest block container ancestor;
-			if that block container is an in-flow block,
+			if that block container is an in-flow block,
 			then its containing block is formed by its parent block container;
 			if that grandparent block container is absolutely positioned,
 			then its containing block is the padding edges of its closest positioned ancestor (not necessarily its parent),

From 77bb7352591e41216ad2c15e9bcd7d837fbbf418 Mon Sep 17 00:00:00 2001
From: gitspeaks <37540903+gitspeaks@users.noreply.github.com>
Date: Tue, 19 Nov 2024 02:24:10 +0200
Subject: [PATCH 102/124] link to absolute-position containing block

---
 css-position-3/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-position-3/Overview.bs b/css-position-3/Overview.bs
index 3634d78914d..ae52a1c7ef8 100644
--- a/css-position-3/Overview.bs
+++ b/css-position-3/Overview.bs
@@ -900,7 +900,7 @@ Absolute Positioning Layout Model
 			as its [=preferred size=] capped by its [=maximum size=] (if any), floored by its [=minimum size=].
 			See [[#abspos-auto-size]].
 			Percentages, however,
-			are resolved against the original [=containing block=] size.
+			are resolved against the [=absolute-position containing block=] size.
 
 		

 			Then, the value of any ''margin/auto'' margins are calculated,

From e18537fbed53c5dac74a41d3f9cb9aae4325382e Mon Sep 17 00:00:00 2001
From: Dmitry Statsenko 
Date: Thu, 25 Jul 2024 18:36:04 +0300
Subject: [PATCH 103/124] [css-logical-1] Fix spurious / in 

---
 css-logical-1/Overview.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/css-logical-1/Overview.bs b/css-logical-1/Overview.bs
index 8e12e95f12d..40a9f75e578 100644
--- a/css-logical-1/Overview.bs
+++ b/css-logical-1/Overview.bs
@@ -62,7 +62,7 @@ Introduction
         that works across different writing systems:
 
     

-        
+        
         
     
 

From 3e44ea59eebfe0b103195857c1d4217f71164bf4 Mon Sep 17 00:00:00 2001
From: fantasai 
Date: Wed, 5 Nov 2025 16:28:48 -0500
Subject: [PATCH 104/124] [css-anchor-position-1] Fix typos

---
 css-position-3/Overview.bs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/css-position-3/Overview.bs b/css-position-3/Overview.bs
index ae52a1c7ef8..8a05840e01e 100644
--- a/css-position-3/Overview.bs
+++ b/css-position-3/Overview.bs
@@ -1736,8 +1736,7 @@ Acknowledgments
 	* Defined the [=initial fixed containing block=] and its relationship to the [=initial containing block=],
 		to give this concept a name.
 
-	See also Previous Changes.
+	See also Previous Changes.
 
 

 Privacy Considerations

From ccb66ec19e37a98ac26c16f5474f1011c93cb05b Mon Sep 17 00:00:00 2001
From: Chris Rebert 
Date: Wed, 5 Nov 2025 14:13:58 -0800
Subject: [PATCH 105/124] [css-display-3][editorial] Gloss in-flow/out-of-flow
 jargon

Backports #11524
---
 css-display-3/Overview.bs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/css-display-3/Overview.bs b/css-display-3/Overview.bs
index ac1d1f3edb1..86069fae735 100644
--- a/css-display-3/Overview.bs
+++ b/css-display-3/Overview.bs
@@ -1178,7 +1178,7 @@ Automatic Box Type Transformations
 		so that it remains a block container.
 
 	* If an [=inline box=] (''inline flow'') is inlinified,
-		it recursively inlinifies all of its in-flow children,
+		it recursively inlinifies all of its in-flow children,
 		so that no block-level descendants
 		break up the inline formatting context in which it participates.
 
@@ -1712,7 +1712,7 @@ Run-In Layout
 	
 
 	A run-in sequence is a maximal sequence of consecutive sibling run-in boxes
-	and intervening white space and/or out-of-flow boxes.
+	and intervening white space and/or out-of-flow boxes.
 
 	Note: This statement implies that out-of-flow boxes are reparented
 	if they are between two run-in boxes.
@@ -1913,7 +1913,7 @@ Appendix A: Glossary
 			that form an ancestor-descendant chain
 			through the containing block relation.
 			For example, an inline box’s containing block is the content box of its closest block container ancestor;
-			if that block container is an in-flow block,
+			if that block container is an in-flow block,
 			then its containing block is formed by its parent block container;
 			if that grandparent block container is absolutely positioned,
 			then its containing block is the padding edges of its closest positioned ancestor (not necessarily its parent),

From a0064bea0b4c17dee01afb1c956adf2a9cbf72e5 Mon Sep 17 00:00:00 2001
From: fantasai 
Date: Wed, 5 Nov 2025 17:22:48 -0500
Subject: [PATCH 106/124] [css-anchor-position-1] Make anchor-center also use
 scrollable containing block #12952

---
 css-anchor-position-1/Overview.bs | 53 ++++++++-----------------------
 1 file changed, 14 insertions(+), 39 deletions(-)

diff --git a/css-anchor-position-1/Overview.bs b/css-anchor-position-1/Overview.bs
index 4811df1639b..6c0bb971862 100644
--- a/css-anchor-position-1/Overview.bs
+++ b/css-anchor-position-1/Overview.bs
@@ -648,7 +648,7 @@ what area of this [=position-area grid=] to lay out the positioned box in.
 Values other than ''position-area/none'' have the following additional effects:
 
 * The [=scrollable containing block=] is used in place of the [=local containing block=]
-	where applicable,
+	when the [=absolute-position containing block=] is generated by a [=scroll container=],
 	so that the entire [=scrollable overflow area=] (typically) is available
 	for positioning.
 * Any ''top/auto'' [=inset properties=] resolve to ''0''.
@@ -1312,9 +1312,12 @@ if the positioned box has a [=default anchor box=],
 then it is centered (insofar as possible)
 over the [=default anchor box=]
 in the relevant axis.
-
-Additionally,
-any ''top/auto'' [=inset properties=] resolve to ''0''.
+Additionally:
+* The [=scrollable containing block=] is used in place of the [=local containing block=]
+	where applicable,
+	so that the entire [=scrollable overflow area=] (typically) is available
+	for positioning.
+* Any ''top/auto'' [=inset properties=] resolve to ''0''.
 
 If the box is not [=absolutely positioned=],
 or does not have a [=default anchor box=],
@@ -2605,38 +2608,10 @@ No Privacy issues have been raised against this document.
 Changes {#changes}
 =======
 
-Significant changes since the 9 May 2025 Working Draft:
-
-* Rename x/y-self-start/end keywords to self-x/y-start/end for 'position-area'
-	due to persistent confusion about the ordering.
-	(Issue 12749)
-* Make 'position-area' use the (newly defined) [=scrollable containing block=]
-	when the box's [=containing block=] is a [=scroll container=].
-	(Issue 10861)
-* Make default 'position-area' alignment for single-''inset/auto'' 'inset' axes align to the non-''inset/auto'' side.
-	(Issue 12512)
-* Make transforms affect the [=anchor box=] geometry.
-	(Issue 8584)
-* Add the ''place-self/dialog'' value to 'align-self' and 'justify-self'
-	to solve regrettable default UA stylesheet rules for HTML popovers.
-	(Issue 10258)
-* Clarify how fragmentation affects the [=anchor box=] geometry.
-	(Issue 12287)
-* Clarify whe the [=last successful position option=] is cleared.
-	(Issue 12577)
-* Clarify how tree-scoped names anchor are matched for 'anchor-scope' vs 'position-anchor'.
-	(Issues 7916, 9408, and 5984)
-* Clarify how top layer interacts with finding the [=acceptable anchor element=]
-	and rewrite the rules for valid anchors to be easier to understand.
-	(Issue 11602)
-* Fix grammar of 'position-try-fallbacks' to exclude lists of ''position-area/none'' keywords.
-	(Issue 12838)
-* Various small fixes and clarifications.
-	(Issue 11028,
-	 Issue 11080,
-	 Issue 12058,
-	 Issue 12636,
-	 Issue 12653,
-	 Issue 12732)
-
-See also Previous Changes.
+Significant changes since the 7 October 2025 Working Draft:
+
+* Define ''anchor-center'' to also use the [=scrollable containing block=]
+	so that it doesn't trigger overflow alignment when positioned outside the [=local containing block=].
+	(Issue 12952)
+
+See also Previous Changes.

From 6e1b8c9fc0c49e35749344ebf3d37d5e1bc3f2c5 Mon Sep 17 00:00:00 2001
From: fantasai 
Date: Wed, 5 Nov 2025 17:47:18 -0500
Subject: [PATCH 107/124] [css-anchor-position-1] Clarify writing-mode for try
 tactics. #12869

---
 css-anchor-position-1/Overview.bs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/css-anchor-position-1/Overview.bs b/css-anchor-position-1/Overview.bs
index 6c0bb971862..83af2db07ac 100644
--- a/css-anchor-position-1/Overview.bs
+++ b/css-anchor-position-1/Overview.bs
@@ -1573,6 +1573,8 @@ Values have the following meanings:
 		If multiple keywords are given,
 		the transformations are composed in order
 		to produce a single [=position option=].
+		Logical directions are resolved against
+		the [=writing mode=] of the [=containing block=].
 
 	: <> || <>
 	::
@@ -2613,5 +2615,7 @@ Significant changes since the Issue 12952)
+* Clarify that ''flip-block'', ''flip-inline'', and ''flip-start'' use the [=writing mode=] of the [=containing block=].
+	(Issue 12869)
 
 See also Previous Changes.

From b009e0a5c616c50872055c97f0d61decee1d2948 Mon Sep 17 00:00:00 2001
From: fantasai 
Date: Wed, 5 Nov 2025 17:52:32 -0500
Subject: [PATCH 108/124] [css-writing-modes][editorial] Add hyphenated lt for
 adjective form linking

---
 css-writing-modes-3/Overview.bs | 4 ++--
 css-writing-modes-4/Overview.bs | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/css-writing-modes-3/Overview.bs b/css-writing-modes-3/Overview.bs
index 3c31053ecad..738c4715ce8 100644
--- a/css-writing-modes-3/Overview.bs
+++ b/css-writing-modes-3/Overview.bs
@@ -1521,8 +1521,8 @@ Abstract Box Terminology
   

The physical dimensions are width and height, - which correspond to measurements along the x-axis - (horizontal dimension) and y-axis (vertical dimension), + which correspond to measurements along the x-axis + (horizontal dimension) and y-axis (vertical dimension), respectively. Abstract dimensions are identical in both flow-relative and line-relative terms, so there is only one set of these terms. diff --git a/css-writing-modes-4/Overview.bs b/css-writing-modes-4/Overview.bs index 2b7e36c94c0..ec5514f7086 100644 --- a/css-writing-modes-4/Overview.bs +++ b/css-writing-modes-4/Overview.bs @@ -1595,8 +1595,8 @@ Abstract Box Terminology

The physical dimensions are width and height, - which correspond to measurements along the x-axis - (horizontal dimension) and y-axis (vertical dimension), + which correspond to measurements along the x-axis + (horizontal dimension) and y-axis (vertical dimension), respectively. Abstract dimensions are identical in both flow-relative and line-relative terms, so there is only one set of these terms. From 5b257aa33d7c57ace0b8a0baed5bf4fc9ed33724 Mon Sep 17 00:00:00 2001 From: fantasai Date: Wed, 5 Nov 2025 17:53:20 -0500 Subject: [PATCH 109/124] [css-anchor-position-1] Add flip-x and flip-y to position-try-fallbacks #12869 --- css-anchor-position-1/Overview.bs | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/css-anchor-position-1/Overview.bs b/css-anchor-position-1/Overview.bs index 83af2db07ac..f650737c10c 100644 --- a/css-anchor-position-1/Overview.bs +++ b/css-anchor-position-1/Overview.bs @@ -1546,7 +1546,7 @@ Values have the following meanings: and adds it to the [=position options list=].

-		<> = flip-block || flip-inline || flip-start
+		<> = flip-block || flip-inline || flip-start || flip-x || flip-y
 		

-Name: justify-self, align-self, justify-items, align-items
-New Values: dialog
-