update all dependencies

css/reveal.scss

@@ -8,7 +8,14 @@
  * Copyright (C) Hakim El Hattab, https://hakim.se
  */
 
-@import 'layout';
+@use 'layout';
+
+/*********************************************
+ * PRINT STYLES
+ *********************************************/
+
+ @use 'print/pdf.scss';
+ @use 'print/paper.scss';
 
 /*********************************************
  * GLOBAL STYLES
@@ -320,7 +327,7 @@ $controlsArrowAngleActive: 36deg;
 		background-color: currentColor;
 
 		transition: all 0.15s ease, background-color 0.8s ease;
-		transform-origin: math.div(floor(($controlArrowThickness*0.5)*10), 10) 50%;
+		transform-origin: math.div(math.floor(($controlArrowThickness*0.5)*10), 10) 50%;
 		will-change: transform;
 	}
 
@@ -2104,11 +2111,3 @@ $notesWidthPercent: 25%;
 	}
 }
 
-
-/*********************************************
- * PRINT STYLES
- *********************************************/
-
-@import 'print/pdf.scss';
-@import 'print/paper.scss';
-

css/theme/template/exposer.scss

@@ -1,5 +1,7 @@
 // Exposes theme's variables for easy re-use in CSS for plugin authors
 
+@use 'sass:color';
+
 :root {
   --r-background-color: #{$backgroundColor};
   --r-main-font: #{$mainFont};
@@ -21,7 +23,7 @@
   --r-heading4-size: #{$heading4Size};
   --r-code-font: #{$codeFont};
   --r-link-color: #{$linkColor};
-  --r-link-color-dark: #{darken($linkColor , 15% )};
+  --r-link-color-dark: #{color.scale($linkColor, $lightness: -15%)};
   --r-link-color-hover: #{$linkColorHover};
   --r-selection-background-color: #{$selectionBackgroundColor};
   --r-selection-color: #{$selectionColor};

css/theme/template/settings.scss

@@ -1,6 +1,8 @@
 // Base settings for all themes that can optionally be
 // overridden by the super-theme
 
+@use 'sass:color';
+
 // Background of the presentation
 $backgroundColor: #2b2b2b;
 
@@ -32,7 +34,7 @@ $codeFont: monospace;
 
 // Links and actions
 $linkColor: #13DAEC;
-$linkColorHover: lighten( $linkColor, 20% );
+$linkColorHover: color.scale( $linkColor, $lightness: 20% );
 
 // Text selection
 $selectionBackgroundColor: #FF5E99;