diff --git a/dev-scripts/setup-storybook.sh b/dev-scripts/setup-storybook.sh
index 30db9d5..1da7d38 100755
--- a/dev-scripts/setup-storybook.sh
+++ b/dev-scripts/setup-storybook.sh
@@ -5,7 +5,10 @@ IFS=$'\n\t'
 mkdir -p .storybook/resolve-less-imports/mediawiki.ui
 mkdir -p docs/ui/assets/
 
+ln -s ../../resources/mediawiki.less/mediawiki.skin.variables.less .storybook/resolve-less-imports/mediawiki.skin.variables.less
+
 curl -sS "https://en.wikipedia.org/w/load.php?only=styles&skin=vector&debug=true&modules=ext.echo.styles.badge|ext.uls.pt|wikibase.client.init|mediawiki.skinning.interface" -o .storybook/integration.less
+curl -sSL "https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/master/resources/src/mediawiki.less/mediawiki.skin.defaults.less?format=TEXT" | base64 --decode > .storybook/resolve-less-imports/mediawiki.skin.defaults.less
 curl -sSL "https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/master/resources/src/mediawiki.less/mediawiki.mixins.less?format=TEXT" | base64 --decode > .storybook/resolve-less-imports/mediawiki.mixins.less
 curl -sSL "https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/master/resources/src/mediawiki.less/mediawiki.ui/variables.less?format=TEXT" | base64 --decode > .storybook/resolve-less-imports/mediawiki.ui/variables.less
 curl -sSL "https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/master/resources/src/mediawiki.less/mediawiki.mixins.rotation.less?format=TEXT" | base64 --decode > .storybook/resolve-less-imports/mediawiki.mixins.rotation.less
diff --git a/resources/mediawiki.less/mediawiki.skin.variables.less b/resources/mediawiki.less/mediawiki.skin.variables.less
new file mode 100644
index 0000000..af4a4c9
--- /dev/null
+++ b/resources/mediawiki.less/mediawiki.skin.variables.less
@@ -0,0 +1,14 @@
+/**
+ * This file is a LESS import match for "mediawiki.skin.variables.less"
+ * when Vector is the active skin.
+ */
+
+@import 'mediawiki.skin.defaults.less';
+
+// Body content uses the user setting in browser / the system default sans-serif font:
+// Arial on Windows, Roboto on Android.
+// FIXME: Use WikimediaUI Base's OS specific default sans-serif fonts.
+@font-family-sans: sans-serif;
+
+// Matches wikimedia-ui-base and OOUI/wikimedia
+@border-radius-base: 2px;
diff --git a/skin.json b/skin.json
index 0e21a08..d3149d8 100644
--- a/skin.json
+++ b/skin.json
@@ -44,6 +44,9 @@
 			]
 		}
 	},
+	"SkinLessImportPaths": {
+		"vector": "resources/mediawiki.less"
+	},
 	"MessagesDirs": {
 		"Vector": [
 			"i18n"
diff --git a/variables.less b/variables.less
index a1ae3e5..98990b2 100644
--- a/variables.less
+++ b/variables.less
@@ -1,4 +1,5 @@
 @import 'mediawiki.ui/variables.less';
+@import 'mediawiki.skin.variables.less';
 
 // Sizing calculation primitives.
 @font-size-root: 100%;
@@ -33,7 +34,7 @@
 // Body content uses the user setting in browser / operating system default sans-serif font:
 // For example, Arial on Windows, Roboto on Android.
 // FIXME: Use WikimediaUI Base's OS specific default sans-serif fonts.
-@font-family-sans: sans-serif;
+// @font-family-sans is set in mediawiki.variables/variables.less
 
 // Fallback for headings, language: ja,he,ko. See T73240, T65817, T65843, T65844, T65827.
 @font-family-sans--fallback: sans-serif;