Add link style reference.

docs/styles/links/link_style.md

@@ -0,0 +1,58 @@
+# Link-style
+
+The `link-style` sets the text style for the link text.
+
+!!! note
+
+    `link-style` only applies to "action links" as described in the [actions guide](../../guide/actions.md#links) and not to regular hyperlinks.
+
+## Syntax
+
+```sass
+link-style: <TEXT STYLE>;
+```
+
+--8<-- "docs/styles/snippets/text_style_syntax.md"
+
+## Example
+
+The example below shows some links with different styles applied to their text.
+It also shows that `link-style` does not affect hyperlinks.
+
+=== "Output"
+
+    ```{.textual path="docs/examples/styles/link_style.py" lines=6}
+    ```
+
+=== "link_style.py"
+
+    ```py hl_lines="8-9 12-13 16-17 20-21"
+    --8<-- "docs/examples/styles/link_style.py"
+    ```
+
+    1. This label has an hyperlink so it won't be affected by the `link-style` rule.
+    2. This label has an "action link" that can be styled with `link-style`.
+    3. This label has an "action link" that can be styled with `link-style`.
+    4. This label has an "action link" that can be styled with `link-style`.
+
+=== "link_style.css"
+
+    ```css hl_lines="2 6 10"
+    --8<-- "docs/examples/styles/link_style.css"
+    ```
+
+    1. This will only affect one of the labels because action links are the only links that this rule affects.
+
+## CSS
+
+```css
+link-style: bold;
+link-style: bold italic reverse;
+```
+
+## Python
+
+```py
+widget.styles.link_style = "bold"
+widget.styles.link_style = "bold italic reverse"
+```