Style all Textual CSS as 'sass'

Textual CSS is better highlighted in SASS code blocks because the SASS parser seems to be more lenient.

docs/styles/scrollbar_colors/index.md

@@ -61,6 +61,6 @@ The right panel sets `scrollbar-background`, `scrollbar-color`, and `scrollbar-c
 
 === "scrollbars.css"
 
-    ```css
+    ```sass
     --8<-- "docs/examples/styles/scrollbars.css"
     ```

docs/styles/scrollbar_colors/scrollbar_background.md

@@ -38,13 +38,13 @@ The `scrollbar-background` sets the background color of the scrollbar.
 
 === "scrollbars2.css"
 
-    ```css hl_lines="2"
+    ```sass hl_lines="2"
     --8<-- "docs/examples/styles/scrollbars2.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-backround: blue;
 ```
 

docs/styles/scrollbar_colors/scrollbar_background_active.md

@@ -39,13 +39,13 @@ The `scrollbar-background-active` sets the background color of the scrollbar whe
 
 === "scrollbars2.css"
 
-    ```css hl_lines="3"
+    ```sass hl_lines="3"
     --8<-- "docs/examples/styles/scrollbars2.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-backround-active: red;
 ```
 

docs/styles/scrollbar_colors/scrollbar_background_hover.md

@@ -39,13 +39,13 @@ The `scrollbar-background-hover` sets the background color of the scrollbar when
 
 === "scrollbars2.css"
 
-    ```css hl_lines="4"
+    ```sass hl_lines="4"
     --8<-- "docs/examples/styles/scrollbars2.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-background-hover: purple;
 ```
 

docs/styles/scrollbar_colors/scrollbar_color.md

@@ -39,13 +39,13 @@ The `scrollbar-color` sets the color of the scrollbar.
 
 === "scrollbars2.css"
 
-    ```css hl_lines="5"
+    ```sass hl_lines="5"
     --8<-- "docs/examples/styles/scrollbars2.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-color: cyan;
 ```
 

docs/styles/scrollbar_colors/scrollbar_color_active.md

@@ -39,13 +39,13 @@ The `scrollbar-color-active` sets the color of the scrollbar when the thumb is b
 
 === "scrollbars2.css"
 
-    ```css hl_lines="6"
+    ```sass hl_lines="6"
     --8<-- "docs/examples/styles/scrollbars2.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-color-active: yellow;
 ```
 

docs/styles/scrollbar_colors/scrollbar_color_hover.md

@@ -39,13 +39,13 @@ The `scrollbar-color-hover` sets the color of the scrollbar when the cursor is o
 
 === "scrollbars2.css"
 
-    ```css hl_lines="7"
+    ```sass hl_lines="7"
     --8<-- "docs/examples/styles/scrollbars2.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-color-hover: pink;
 ```
 

docs/styles/scrollbar_colors/scrollbar_corner_color.md

@@ -37,13 +37,13 @@ The example below sets the scrollbar corner (bottom-right corner of the screen)
 
 === "scrollbar_corner_color.css"
 
-    ```css hl_lines="3"
+    ```sass hl_lines="3"
     --8<-- "docs/examples/styles/scrollbar_corner_color.css"
     ```
 
 ## CSS
 
-```css
+```sass
 scrollbar-corner-color: white;
 ```