diff --git a/cmd/tools/vdoc-resources/doc.css b/cmd/tools/vdoc-resources/doc.css
index 2948f5a57a..c847ce6363 100644
--- a/cmd/tools/vdoc-resources/doc.css
+++ b/cmd/tools/vdoc-resources/doc.css
@@ -267,6 +267,9 @@ body {
 	padding: 1rem;
 	overflow: hidden;
 }
+.doc-content img {
+	width: 100%;
+}
 .doc-content p {
 	line-height: 1.4;
 }
diff --git a/cmd/tools/vdoc-resources/doc.js b/cmd/tools/vdoc-resources/doc.js
index 4033799ca5..7fb63d19a6 100644
--- a/cmd/tools/vdoc-resources/doc.js
+++ b/cmd/tools/vdoc-resources/doc.js
@@ -64,6 +64,7 @@ function setupMobileToggle() {
 }
 
 function setupDarkMode() {
+    var html = document.getElementsByTagName('html')[0];
     var darkModeToggle = document.getElementById('dark-mode-toggle');
     darkModeToggle.addEventListener('click', function() {
         html.classList.toggle('dark');