[gtk/doc-chapters-markdown: 15/29] docs: Convert css overview to markdown

From: Matthias Clasen <matthiasc src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtk/doc-chapters-markdown: 15/29] docs: Convert css overview to markdown
Date: Mon, 25 May 2020 20:13:40 +0000 (UTC)
commit 9873d983ed0a4b4b374515d8d818d50b0aff0299
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat May 23 21:32:35 2020 -0400

    docs: Convert css overview to markdown

 docs/reference/gtk/css-overview.md   |   79 +++
 docs/reference/gtk/css-overview.xml  | 1179 ----------------------------------
 docs/reference/gtk/css-properties.md |  238 +++++++
 docs/reference/gtk/gtk4-docs.xml     |    1 +
 docs/reference/gtk/meson.build       |    5 +-
 5 files changed, 321 insertions(+), 1181 deletions(-)
---
diff --git a/docs/reference/gtk/css-overview.md b/docs/reference/gtk/css-overview.md
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+# CSS in GTK {#css}
+
+This chapter describes how GTK uses CSS for styling and layout. 
+It is not meant to be an explanation of CSS from first principles,
+but focuses on listing supported CSS features and differences
+between Web CSS and GTK.
+
+There is plenty of introductory documentation available that
+can be used to learn about CSS in general. In the tables below
+we include links to the official specs that can be used to look
+up the definition of individual selectors and properties.
+
+## CSS nodes
+
+GTK applies the style information found in style sheets by matching
+the selectors against a tree of nodes. Each node in the tree has a
+name, a state and possibly style classes. The children of each node
+are linearly ordered.
+
+Every widget has one or more of these CSS nodes, and determines their
+name, state, style classes and how they are layed out as children and
+siblings in the overall node tree. The documentation for each widget
+explains what CSS nodes it has.
+
+### The CSS nodes of a GtkScale
+
+```
+scale[.fine-tune]
+├── marks.top
+│   ├── mark
+┊   ┊
+│   ╰── mark
+├── trough
+│   ├── slider
+│   ├── [highlight]
+│   ╰── [fill]
+╰── marks.bottom
+    ├── mark
+    ┊
+    ╰── mark
+```
+
+## Selectors
+
+Selectors work very similar to the way they do on the web.
+
+All widgets have one or more CSS nodes with element names and style
+classes. When style classes are used in selectors, they have to be prefixed
+with a period. Widget names can be used in selectors like IDs. When used
+in a selector, widget names must be prefixed with a &num; character.
+
+### GTK CSS Selectors
+
+| Pattern | Reference | Notes |
+|:--------|:----------|:------|
+| *       | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#universal-selector) | |
+| E       | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#type-selectors) | |
+| E.class | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#class-html) | |
+| E#id    | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#id-selectors) | |
+| E:nth-child(n) | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#structural-pseudos) | |
+| E:nth-last-child(n) | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#structural-pseudos) | |
+| E:first-child | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#structural-pseudos) | |
+| E:last-child | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#structural-pseudos) | |
+| E:only-child | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#structural-pseudos) | |
+| E:link, E:visited | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#link) | Corresponds to 
GTK_STATE_FLAG_LINK and GTK_STATE_FLAGS_VISITED |
+| E:active, E:hover, E:focus | [CSS Selector Level 
3](https://www.w3.org/TR/css3-selectors/#useraction-pseudos) | Correspond to GTK_STATE_FLAG_ACTIVE, 
GTK_STATE_FLAG_PRELIGHT, GTK_STATE_FLAGS_FOCUSED |
+| E:focus-within | [CSS Selector Level 4](https://drafts.csswg.org/selectors/#focus-within-pseudo) | Set on 
all ancestors of the focus widget, unlike CSS |
+| E:focus-visible | [CSS Selector Level 4](https://drafts.csswg.org/selectors/#focus-within-pseudo) | Set on 
focus widget and all ancestors, unlike CSS |
+| E:disabled | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#UIstates) | Corresponds to 
GTK_STATE_FLAG_INSENSITIVE |
+| E:disabled | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#UIstates) | Corresponds to 
GTK_STATE_FLAG_CHECKED |
+| E:indeterminate | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#indeterminate) | 
Corresponds to GTK_STATE_FLAG_INCONSISTENT |
+| E:backdrop, E:selected | | Corresponds to GTK_STATE_FLAG_BACKDROP, GTK_STATE_FLAG_SELECTED |
+| E:not(selector) | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#negation) | |
+| E:dir(ltr), E:dir(rtl) | [CSS Selector Level 4](https://drafts.csswg.org/selectors/#the-dir-pseudo) | |
+| E:drop(active) | [CSS Selector Level 4](https://drafts.csswg.org/selectors/#drag-pseudos) | |
+| E F | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#descendent-combinators) | |
+| E > F | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#child-combinators) | |
+| E ~ F | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#general-sibling-combinators) | |
+| E + F | [CSS Selector Level 3](https://www.w3.org/TR/css3-selectors/#adjacent-sibling-combinators) | |
diff --git a/docs/reference/gtk/css-properties.md b/docs/reference/gtk/css-properties.md
new file mode 100644
index 0000000000..7e6fcdedaa
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+++ b/docs/reference/gtk/css-properties.md
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+# GTK CSS Properties
+
+GTK supports CSS properties and shorthands as far as they can be applied
+in the context of widgets, and adds its own properties only when needed.
+All GTK-specific properties have a -gtk prefix.
+
+## Basic types
+
+All properties support the following keywords: inherit, initial, unset,
+with the same meaning as defined in the
+[CSS Cascading and Inheritance](https://www.w3.org/TR/css3-cascade/#defaulting-keywords)
+spec.
+
+The following units are supported for basic datatypes:
+
+Length
+ : px, pt, em, ex, rem, pc, in, cm, mm, calc()
+Percentage
+ : %, calc()
+Angle
+ : deg | grad | turn, calc()
+Time
+ : s | ms, calc()
+
+Length values with the em or ex units are resolved using the font
+size value, unless they occur in setting the font-size itself, in
+which case they are resolved using the inherited font size value.
+
+The rem unit is resolved using the initial font size value, which is
+not quite the same as the CSS definition of rem.
+
+The calc() notation adds considerable expressive power. There are limits
+on what types can be combined in such an expression (e.g. it does not make
+sense to add a number and a time). For the full details, see the
+[CSS3 VAlues and Units](https://www.w3.org/TR/css3-values/#calc-notation)
+spec.
+
+A common pattern among shorthand properties (called 'four sides') is one
+where one to four values can be specified, to determine a value for each
+side of an area. In this case, the specified values are interpreted as
+follows:
+
+4 values:
+ : top right bottom left
+3 values:
+ : top horizontal bottom
+2 values:
+ : vertical horizontal
+1 value:
+ : all
+
+## Colors
+
+GTK extends the CSS syntax with several additional ways to specify colors.
+
+The first is a reference to a color defined via a @define-color rule in CSS.
+The syntax for @define-color rules is as follows:
+
+```
+@define-color Name Color
+```
+
+To refer to the color defined by a @define-color rule, prefix the name with @.
+
+GTK also supports color expressions, which allow colors to be transformed to
+new ones. Color expressions can be nested, providing a rich language to
+define colors. Color expressions resemble functions, taking 1 or more colors
+and in some cases a number as arguments.
+
+`lighter(Color)`
+ : produces a brigher variant of Color
+`darker(Color)`
+ : produces a darker variant of Color
+`shade(Color, Number)`
+ : changes the lightness of Color. The number ranges from 0 for black to 2 for white.
+`alpha(Color, Number)`
+ : replaces the alpha value of color with number (between 0 and 1)
+`mix(Color1, Color2, Number)`
+ : interpolates between the two colors
+
+## Images
+
+GTK extends the CSS syntax for images and also uses it for specifying icons.
+To load a themed icon, use
+
+```
+-gtk-icontheme(Name)
+```
+
+The specified icon name is used to look up a themed icon, while taking into
+account the values of the -gtk-icon-palette property. This kind of image is
+mainly used as value of the -gtk-icon-source property. 
+
+Symbolic icons from the icon theme are recolored according to the
+-gtk-icon-palette property, which defines a list of named colors.
+The recognized names for colors in symbolic icons are error, warning
+and success. The default palette maps these three names to symbolic
+colors with the names @error_color, @warning_color and @success_color
+respectively. The syntax for defining a custom palette is a comma-separated
+list of name-color pairs, e.g.
+
+```
+success blue, warning #fc3, error magenta
+```
+
+Recoloring is sometimes needed for images that are not part of an icon theme,
+and the
+
+```
+-gtk-recolor(uri, palette)
+```
+
+syntax makes this available. -gtk-recolor requires a url as first argument.
+The remaining arguments specify the color palette to use. If the palette is
+not explicitly specified, the current value of the -gtk-icon-palette property
+is used. 
+
+GTK supports scaled rendering on hi-resolution displays. This works best if
+images can specify normal and hi-resolution variants. From CSS, this can be
+done with
+
+```
+-gtk-scaled(Image1, Image2)
+```
+
+## GTK CSS Properties
+
+| Property   | Reference | Notes |
+|:-----------|:----------|:------|
+|color       | [CSS Color Level 3](https://www.w3.org/TR/css3-color/#foreground) | |
+|opacity     | [CSS Color Level 3](https://www.w3.org/TR/css3-color/#opacity) | |
+|filter      | [CSS Filter Effect Level 1](https://drafts.fxtf.org/filters/#FilterProperty) | |
+|font-family | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-family-prop) | defaults to 
gtk-font-name setting |
+|font-size   | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-size-prop) | defaults to 
gtk-font-name setting |
+|font-style  | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-style-prop) | |
+|font-variant| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#descdef-font-variant) | only CSS2 
values supported |
+|font-weight | [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-weight-prop) | |
+|font-stretch| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-stretch-prop) | |
+|font-kerning| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-kerning-prop) | |
+|font-variant-ligatures| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-ligatures-prop) 
| |
+|font-variant-position| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-position-prop) | |
+|font-variant-caps| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-position-prop) | |
+|font-variant-numeric| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-numeric-prop) | |
+|font-variant-alternates| [CSS Fonts Level 
3](https://www.w3.org/TR/css3-fonts/#font-variant-alternates-prop) | |
+|font-variant-east-asian| [CSS Fonts Level 
3](https://www.w3.org/TR/css3-fonts/#font-variant-east-asian-prop) | |
+|font-feature-settings| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-feature-settings-prop) | |
+|font-variation-settings| [CSS Fonts Level 
4](https://www.w3.org/TR/css-fonts-4/#font-variation-settings-def) | |
+|-gtk-dpi|[Number](https://www.w3.org/TR/css3-values/#number-value) | defaults to screen resolution |
+|font| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-prop) | CSS allows line-height, etc |
+|font-variant| [CSS Fonts Level 3](https://www.w3.org/TR/css3-fonts/#font-variant-prop) | |
+|caret-color|[CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#caret-color) | CSS allows an 
auto value |
+|-gtk-secondary-caret-color|[Color](https://www.w3.org/TR/css-color-3/#valuea-def-color) | used for the 
secondary caret in bidirectional text |
+|letter-spacing| [CSS Text Level 3](https://www.w3.org/TR/css3-text/#letter-spacing) | |
+|text-decoration-line| [CSS Text Decoration Level 
3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-line-property) | CSS allows overline |
+|text-decoration-color| [CSS Text Decoration Level 
3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-color-property) | |
+|text-decoration-style| [CSS Text Decoration Level 
3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-style-property) | CSS allows dashed and dotted |
+|text-shadow| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-shadow-property) | |
+|text-decoration| [CSS Text Decoration Level 
3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-property) | |
+|-gtk-icon-source| [Image](https://www.w3.org/TR/css-backgrounds-3/#typedef-image), `builtin` or `none` | 
used for builtin icons in buttons and expanders |
+|-gtk-icon-size| [Length](https://www.w3.org/TR/css3-values/#length-value) | size used for builtin icons in 
buttons and expanders |
+|-gtk-icon-style| `requested`, `regular` or `symbolic` | preferred style for application-loaded icons |
+|-gtk-icon-transform| [Transform list](https://drafts.csswg.org/css-transforms-1/#typedef-transform-list) or 
`none` | applied to builtin and application-loaded icons |
+|-gtk-icon-palette| Color palette, as explained above | used to recolor symbolic icons |
+|-gtk-icon-shadow| [Shadow](https://www.w3.org/TR/css-backgrounds-3/#typedef-shadow) or `none` | applied to 
builtin and application-loaded icons |
+|-gtk-icon-filter| [Filter value list](https://www.w3.org/TR/filter-effects-1/#typedef-filter-value-list) or 
`none` | applied to builtin and application-loaded icons |
+|transform| [CSS Transforms Level 2](https://drafts.csswg.org/css-transforms-2/) | |
+|min-width| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#min-width) | CSS allows percentages |
+|min-height| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#min-height) | CSS allows percentages |
+|margin-top| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-top) | CSS allows percentages or 
auto |
+|margin-right| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-right) | CSS allows 
percentages or auto |
+|margin-bottom| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-bottom) | CSS allows 
percentages or auto |
+|margin-left| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin-left) | CSS allows percentages 
or auto |
+|padding-top| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-top) | CSS allows percentages |
+|padding-right| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-right) | CSS allows 
percentages |
+|padding-bottom| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-bottom) | CSS allows 
percentages |
+|padding-left| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding-left) | CSS allows 
percentages |
+|margin| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#margin) | a 'four sides' property |
+|padding| [CSS Box Model Level 3](https://www.w3.org/TR/css3-box/#padding) | a 'four sides' property |
+|border-top-width| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
+|border-right-width| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
+|border-bottom-width| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
+|border-left-width| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-width) | CSS allows other values |
+|border-top-style| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-style) | |
+|border-right-style| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-style) | |
+|border-bottom-style| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-style) | |
+|border-left-style| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-style) | |
+|border-top-right-radius| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
+|border-bottom-right-radius| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
+|border-bottom-left-radius| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
+|border-top-left-radius| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-radius) | |
+|border-top-color| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-color) | |
+|border-right-color| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-color) | |
+|border-bottom-color| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-color) | |
+|border-left-color| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-color) | |
+|border-image-source| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-image-source) | |
+|border-image-repeat| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-image-repeat) | |
+|border-image-slice| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-image-slice) | a 'four sides' property |
+|border-image-width| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-image-width) | a 'four sides' property |
+|border-width| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-width) | a 'four sides' property |
+|border-style| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#the-border-style) | a 'four sides' property |
+|border-color| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-color) | 
a 'four sides' property |
+|border-top| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-top) | |
+|border-right| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-right) | |
+|border-bottom| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-bottom) 
| |
+|border-left| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-left) | |
+|border| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border) | |
+|border-radius| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-radius) 
| |
+|border-image| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#border-image) | |
+|outline-style| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-style) | initial 
value is none, auto is not supported |
+|outline-width| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-width) | |
+|outline-color| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-color) | initial 
value is currentColor, invert is not supported |
+|outline-offset| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#outline-offset) | |
+|outline| [CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#propdef-outline) | |
+|background-color| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-color) | |
+|background-clip| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-clip) | |
+|background-origin| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-origin) | |
+|background-size| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-size) | |
+|background-position| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-position) | |
+|background-repeat| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-repeat) | |
+|background-image| [CSS Backgrounds and Borders Level 
3](https://www.w3.org/TR/css3-background/#background-image) | not supported: urls without quotes, colors in 
crossfades |
+|box-shadow| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#box-shadow) | |
+|background-blend-mode| [CSS Compositing and Blending Level 
1](https://www.w3.org/TR/compositing-1/#propdef-background-blend-mode) | only affects multiple backgrounds |
+|background| [CSS Backgrounds and Borders Level 3](https://www.w3.org/TR/css3-background/#background) | |
+|transition-property| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-property) | |
+|transition-duration| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-duration) | |
+|transition-timing-function| [CSS 
Transitions](https://www.w3.org/TR/css3-transitions/#transition-timing-function) | |
+|transition-delay| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition-delay) | |
+|transition| [CSS Transitions](https://www.w3.org/TR/css3-transitions/#transition) | |
+|animation-name| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-name) | |
+|animation-duration| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-duration) | |
+|animation-timing-function| [CSS Animations Level 
1](https://www.w3.org/TR/css3-animations/#animation-timing-function) | |
+|animation-iteration-count| [CSS Animations Level 
1](https://www.w3.org/TR/css3-animations/#animation-iteration-count) | |
+|animation-direction| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-direction) | 
|
+|animation-play-state| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-play-state) 
| |
+|animation-delay| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-delay) | |
+|animation-fill-mode| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation-fill-mode) | 
|
+|animation| [CSS Animations Level 1](https://www.w3.org/TR/css3-animations/#animation) | |
+|border-spacing| [CSS Table Level 3](https://www.w3.org/TR/css-tables-3/#border-spacing-property) | 
respected by GtkBox and GtkGrid |
diff --git a/docs/reference/gtk/gtk4-docs.xml b/docs/reference/gtk/gtk4-docs.xml
index 6905a4ea42..a0ec153bbd 100644
--- a/docs/reference/gtk/gtk4-docs.xml
+++ b/docs/reference/gtk/gtk4-docs.xml
@@ -378,6 +378,7 @@
   <part id="theming">
     <title>Theming in GTK</title>
     <xi:include href="css-overview.xml" />
+    <xi:include href="css-properties.xml" />
     <xi:include href="xml/gtkstylecontext.xml" />
     <xi:include href="xml/gtkcssprovider.xml" />
     <xi:include href="xml/gtkstyleprovider.xml" />
diff --git a/docs/reference/gtk/meson.build b/docs/reference/gtk/meson.build
index b8ef12a6bd..b30bbb91b7 100644
--- a/docs/reference/gtk/meson.build
+++ b/docs/reference/gtk/meson.build
@@ -343,7 +343,6 @@ content_files = [
   'broadway.xml',
   'building.xml',
   'compiling.xml',
-  'css-overview.xml',
   'glossary.xml',
   'gtk4-broadwayd.xml',
   'gtk4-builder-tool.xml',
@@ -382,7 +381,9 @@ expand_content_md_files = [
   'migrating-3to4.md',
   'actions.md',
   'input-handling.md',
-  'drawing-model.md'
+  'drawing-model.md',
+  'css-overview.md',
+  'css-properties.md'
 ]
 
 types_conf = configuration_data()
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