Balasana: set proper configuration for main-nav font

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

@@ -318,6 +318,7 @@ $config-header: (
 		// Fonts
 		"font": (
 			"family": map-deep-get($config-global, "font", "family", "secondary"),
+			"family-css-variable": '--font-base',
 			"size": map-deep-get($config-global, "font", "size", "base"),
 			"weight": 400,
 			"line-height": 1,

balasana/style-rtl.css

@@ -2537,7 +2537,7 @@ body:not(.fse-enabled) .site-description {
 	color: #303030;
 	display: block;
 	font-family: Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-	font-family: var(--font-headings, Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
+	font-family: var(--font-base, Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
 	font-weight: 400;
 	padding: 8px 0;
 }

balasana/style.css

@@ -2554,7 +2554,7 @@ body:not(.fse-enabled) .site-description {
 	color: #303030;
 	display: block;
 	font-family: Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-	font-family: var(--font-headings, Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
+	font-family: var(--font-base, Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif);
 	font-weight: 400;
 	padding: 8px 0;
 }