Add style module resetting skin inline-code styling

extension.json

@@ -40,6 +40,17 @@
 		"CodeEditorGetPageLanguage": "ProfessionalWiki\\NativeMarkdown\\EntryPoints\\NativeMarkdownHooks::onCodeEditorGetPageLanguage"
 	},
 
+	"ResourceFileModulePaths": {
+		"localBasePath": "resources",
+		"remoteExtPath": "NativeMarkdown"
+	},
+
+	"ResourceModules": {
+		"ext.nativeMarkdown.styles": {
+			"styles": [ "ext.nativeMarkdown.styles.css" ]
+		}
+	},
+
 	"config": {
 		"NativeMarkdownNamespaces": {
 			"description": "Namespaces (IDs) in which new pages default to the markdown content model.",

resources/ext.nativeMarkdown.styles.css

@@ -0,0 +1,9 @@
+/* Skins style the bare `code` element for inline code (background, border,
+   padding). CommonMark nests `code` inside `pre` for fenced code blocks, a
+   combination wikitext never produces, so that inline styling paints a pill
+   per line there. Reset it; the `pre` container provides the block styling. */
+.mw-parser-output pre > code {
+	background-color: transparent;
+	border: 0;
+	padding: 0;
+}

src/EntryPoints/MarkdownContentHandler.php

@@ -136,6 +136,7 @@ protected function fillParserOutput( Content $content, ContentParseParams $cpoPa
 		);
 
 		$output->setFromParserOptions( $cpoParams->getParserOptions() );
+		$output->addModuleStyles( [ 'ext.nativeMarkdown.styles' ] );
 
 		$this->registerLinks( $output, $rendered );
 		$this->registerCategories( $output, $rendered );

tests/phpunit/EntryPoints/MarkdownContentHandlerTest.php

@@ -34,6 +34,12 @@ public function testRendersMarkdownAsHtml(): void {
 		$this->assertStringContainsString( '<strong>bold</strong>', $output->getRawText() );
 	}
 
+	public function testAddsCodeBlockStyleModule(): void {
+		$output = $this->getParserOutput( "```python\nprint(42)\n```" );
+
+		$this->assertContains( 'ext.nativeMarkdown.styles', $output->getModuleStyles() );
+	}
+
 	public function testRegistersInternalLinks(): void {
 		$output = $this->getParserOutput( 'See [[Linked Page]] and [[Another One|label]]' );