Leven: migrate to use font-family mixin

leven/sass/_config-child-theme-deep.scss

@@ -20,10 +20,19 @@ $config-global: (
 	"font": (
 		/* Font Family */
 		"family": (
-			"primary": "-apple-system\, BlinkMacSystemFont\, \"Segoe UI\"\, \"Roboto\"\, \"Oxygen\"\, \"Ubuntu\"\, \"Cantarell\"\, \"Fira Sans\"\, \"Droid Sans\"\, \"Helvetica Neue\"\, sans-serif",
-			"secondary": "\"Crimson Text\", sans-serif",
+			"primary": (
+				"fallback": "-apple-system\, BlinkMacSystemFont\, \"Segoe UI\"\, \"Roboto\"\, \"Oxygen\"\, \"Ubuntu\"\, \"Cantarell\"\, \"Fira Sans\"\, \"Droid Sans\"\, \"Helvetica Neue\"\, sans-serif",
+				"css-var": '--font-headings',
+			),
+			"secondary": (
+				"fallback": "\"Crimson Text\", sans-serif",
+				"css-var": '--font-base',
+			),
 			"code": "monospace, monospace",
-			"ui": "-apple-system\, BlinkMacSystemFont\, \"Segoe UI\"\, \"Roboto\"\, \"Oxygen\"\, \"Ubuntu\"\, \"Cantarell\"\, \"Fira Sans\"\, \"Droid Sans\"\, \"Helvetica Neue\"\, sans-serif",
+			"ui": (
+				"fallback": "-apple-system\, BlinkMacSystemFont\, \"Segoe UI\"\, \"Roboto\"\, \"Oxygen\"\, \"Ubuntu\"\, \"Cantarell\"\, \"Fira Sans\"\, \"Droid Sans\"\, \"Helvetica Neue\"\, sans-serif",
+				"css-var": '--font-base',
+			),
 		),
 		/* Font Size */
 		"size": (
@@ -140,7 +149,10 @@ $config-elements: (
 
 		// Fonts
 		"font": (
-			"family": map-deep-get($config-global, "font", "family", "secondary"),
+			"family": (
+				"fallback": map-deep-get($config-global, "font", "family", "secondary", "fallback"),
+				"css-var": map-deep-get($config-global, "font", "family", "secondary", "css-var"),
+			),
 			"line-height": map-deep-get($config-global, "font", "line-height", "md"),
 			"size": map-deep-get($config-global, "font", "size", "md"),
 			"weight": bold,
@@ -169,7 +181,10 @@ $config-button: (
 	),
 	// Fonts
 	"font": (
-		"family": map-deep-get($config-global, "font", "family", "ui"),
+		"family": (
+			"fallback": map-deep-get($config-global, "font", "family", "ui", "fallback"),
+			"css-var": map-deep-get($config-global, "font", "family", "ui", "css-var"),
+		),
 		"size": map-deep-get($config-global, "font", "size", "md"),
 		"weight": 700,
 		"line-height": 1,
@@ -202,7 +217,10 @@ $config-heading: (
 	// Fonts & Typography
 	"font": (
 		// Family
-		"family": map-deep-get($config-global, "font", "family", "primary"),
+		"family": (
+			"fallback": map-deep-get($config-global, "font", "family", "primary", "fallback"),
+			"css-var": map-deep-get($config-global, "font", "family", "primary", "css-var"),
+		),
 		// Size
 		"size": (
 			"h6": map-deep-get($config-global, "font", "size", "md"),
@@ -241,7 +259,10 @@ $config-heading: (
 $config-list: (
 	// Fonts
 	"font": (
-		"family": map-deep-get($config-global, "font", "family", "primary"),
+		"family": (
+			"fallback": map-deep-get($config-global, "font", "family", "primary", "fallback"),
+			"css-var": map-deep-get($config-global, "font", "family", "primary", "css-var"),
+		),
 	),
 );
 
@@ -251,7 +272,10 @@ $config-list: (
 $config-pullquote: (
 	// Font
 	"font": (
-		"family": #{map-deep-get($config-heading, "font", "family")},
+		"family": (
+			"fallback": map-deep-get($config-heading, "font", "family", "fallback"),
+			"css-var": map-deep-get($config-heading, "font", "family", "css-var"),
+		),
 	),
 	// Border
 	"color": (
@@ -270,7 +294,10 @@ $config-pullquote: (
 $config-quote: (
 	// Font
 	"font": (
-		"family": #{map-deep-get($config-heading, "font", "family")},
+		"family": (
+			"fallback": map-deep-get($config-heading, "font", "family", "fallback"),
+			"css-var": map-deep-get($config-heading, "font", "family", "css-var"),
+		),
 	),
 );
 
@@ -298,7 +325,10 @@ $config-header: (
 		"title": (
 			// Fonts
 			"font": (
-				"family": map-deep-get($config-global, "font", "family", "primary"),
+				"family": (
+					"fallback": map-deep-get($config-global, "font", "family", "primary", "fallback"),
+					"css-var": map-deep-get($config-global, "font", "family", "primary", "css-var"),
+				),
 				"size": map-deep-get($config-global, "font", "size", "md"),
 				"weight": bold,
 				"line-height": 1,
@@ -308,7 +338,10 @@ $config-header: (
 		"description": (
 			// Fonts
 			"font": (
-				"family": map-deep-get($config-global, "font", "family", "primary"),
+				"family": (
+					"fallback": map-deep-get($config-global, "font", "family", "primary", "fallback"),
+					"css-var": map-deep-get($config-global, "font", "family", "primary", "css-var"),
+				),
 				"size": map-deep-get($config-global, "font", "size", "sm"),
 			),
 		),
@@ -323,7 +356,10 @@ $config-header: (
 		),
 		// Fonts
 		"font": (
-			"family": map-deep-get($config-global, "font", "family", "primary"),
+			"family": (
+				"fallback": map-deep-get($config-global, "font", "family", "primary", "fallback"),
+				"css-var": map-deep-get($config-global, "font", "family", "primary", "css-var"),
+			),
 			"family-css-variable": '--font-headings',
 			"size": map-deep-get($config-global, "font", "size", "base"),
 			"weight": bold,
@@ -354,7 +390,10 @@ $config-footer: (
 	),
 	// Fonts
 	"font": (
-		"family": map-deep-get($config-global, "font", "family", "primary"),
+		"family": (
+			"fallback": map-deep-get($config-global, "font", "family", "primary", "fallback"),
+			"css-var": map-deep-get($config-global, "font", "family", "primary", "css-var"),
+		),
 		"size": map-deep-get($config-global, "font", "size", "sm"),
 		"line-height": map-deep-get($config-global, "font", "line-height", "sm"),
 	),

leven/sass/_config-child-theme.scss

@@ -6,8 +6,8 @@
 // @import url('https://fonts.googleapis.com/css?family=Playfair+Display:400,400i|Roboto:400,400i,700&display=swap');
 
 $config-global: map-deep-set($config-global, "font" "size" "root", "20px");
-$config-global: map-deep-set($config-global, "font" "family" "primary", "\'Playfair Display\', serif");
-$config-global: map-deep-set($config-global, "font" "family" "secondary", "\'Roboto\', sans-serif");
+$config-global: map-deep-set($config-global, "font" "family" "primary", "fallback", "\'Playfair Display\', serif");
+$config-global: map-deep-set($config-global, "font" "family" "secondary","fallback", "\'Roboto\', sans-serif");
 $config-global: map-deep-set($config-global, "color" "primary" "default", pink);
 $config-global: map-deep-set($config-global, "font" "size" "root", "20px");
 
@@ -15,12 +15,12 @@ $config-global: map-deep-set($config-global, "font" "size" "root", "20px");
 $config-button: map-deep-set($config-button, "color" "background", orange);
 
 // Headings
-$config-heading: map-deep-set($config-heading, "font" "family", "\'Playfair Display\', serif");
+$config-heading: map-deep-set($config-heading, "font" "family", "fallback", "\'Playfair Display\', serif");
 $config-heading: map-deep-set($config-heading, "font" "weight", 200);
 
 // Header
-$config-header: map-deep-set($config-header, "branding" "title" "font" "family", "\'Playfair Display\', serif");
+$config-header: map-deep-set($config-header, "branding" "title" "font" "family", "fallback", "\'Playfair Display\', serif");
 $config-header: map-deep-set($config-header, "branding" "title" "font" "weight", 200);
-$config-header: map-deep-set($config-header, "branding" "description" "font" "family", "\'Roboto\', sans-serif");
+$config-header: map-deep-set($config-header, "branding" "description" "font" "family", "fallback", "\'Roboto\', sans-serif");
 $config-header: map-deep-set($config-header, "branding" "color" "link", orange);
 $config-header: map-deep-set($config-header, "main-nav" "color" "link", orange);

leven/sass/_extra-child-theme.scss

@@ -7,8 +7,7 @@ html {
 }
 
 .has-small-font-size {
-	font-family: #{map-deep-get($config-global, "font", "family", "primary")}; // For browsers without support for CSS custom properties.
-	font-family: var( --font-headings, #{map-deep-get($config-global, "font", "family", "primary")} );
+	@include font-family( map-deep-get($config-global, "font", "family", "primary") );
 }
 
 a {

leven/sass/style-child-theme-editor.scss

@@ -38,6 +38,5 @@
  */
 
 .has-small-font-size {
-	font-family: #{map-deep-get($config-global, "font", "family", "primary")};
-	font-family: var( --font-headings, #{map-deep-get($config-global, "font", "family", "primary")} );
+	@include font-family( map-deep-get($config-global, "font", "family", "primary") );
 }

leven/style-editor.css

@@ -115,6 +115,10 @@ $grid-configuration: map-extend($grid-configuration-default, $grid-configuration
  * Crop Text Boundry
  * - Sets a fixed-width on content within alignwide and alignfull blocks
  */
+/**
+ * Add font-family using CSS variables.
+ * It also adds the proper fallback for browsers without support.
+ */
 /**
  * Child Theme Name
  */

leven/style-rtl.css

@@ -136,6 +136,10 @@ $grid-configuration: map-extend($grid-configuration-default, $grid-configuration
  * Crop Text Boundry
  * - Sets a fixed-width on content within alignwide and alignfull blocks
  */
+/**
+ * Add font-family using CSS variables.
+ * It also adds the proper fallback for browsers without support.
+ */
 /**
  * Child Theme Deep
  */
@@ -1637,7 +1641,7 @@ img {
 ul,
 ol {
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-	font-family: var(--font-base, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
+	font-family: var(--font-headings, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
 	margin: 0;
 	padding-right: 32px;
 }
@@ -2376,7 +2380,7 @@ table th,
 .site-description {
 	color: currentColor;
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-	font-family: var(--font-base, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
+	font-family: var(--font-headings, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
 }
 
 body:not(.fse-enabled) .site-title {

leven/style.css

@@ -136,6 +136,10 @@ $grid-configuration: map-extend($grid-configuration-default, $grid-configuration
  * Crop Text Boundry
  * - Sets a fixed-width on content within alignwide and alignfull blocks
  */
+/**
+ * Add font-family using CSS variables.
+ * It also adds the proper fallback for browsers without support.
+ */
 /**
  * Child Theme Deep
  */
@@ -1637,7 +1641,7 @@ img {
 ul,
 ol {
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-	font-family: var(--font-base, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
+	font-family: var(--font-headings, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
 	margin: 0;
 	padding-left: 32px;
 }
@@ -2393,7 +2397,7 @@ table th,
 .site-description {
 	color: currentColor;
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-	font-family: var(--font-base, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
+	font-family: var(--font-headings, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
 }
 
 body:not(.fse-enabled) .site-title {