build: more fixes

npm/design-system/src/css/func.scss

@@ -7,6 +7,8 @@
 * @return {String} - Updated string
 */
 // Taken from https://gist.github.com/PuddingNL/51866d4b9f1151963fbd973bf1d66116
+@use "sass:math";
+
 @function str-replace($string, $search, $replace: '') {
   $index: str-index($string, $search);
 
@@ -18,5 +20,5 @@
 }
 
 @function change-rem-unit-to-em($number) {
-  @return ($number / 1rem) + 0em;
+  @return math.div($number, 1rem) + 0em;
 }

packages/runner-ct/src/app/RunnerCt.scss

@@ -69,7 +69,7 @@ $resizerLineSize: 4px;
   }
 
   &.horizontal {
-    margin: -($resize-thickness / 2) 0;
+    margin: -($resize-thickness * 0.5) 0;
     height: $resize-thickness;
     width: 100%;
     cursor: row-resize;
@@ -83,7 +83,7 @@ $resizerLineSize: 4px;
   }
 
   &.vertical {
-    margin: 0 -($resize-thickness / 2);
+    margin: 0 -($resize-thickness * 0.5);
     width: $resize-thickness;
     height: 100%;
     cursor: col-resize;