diff --git a/docs/prune-simulator/documentation.html b/docs/prune-simulator/documentation.html
index 2bd90b94..e1d1fb1d 100644
--- a/docs/prune-simulator/documentation.html
+++ b/docs/prune-simulator/documentation.html
@@ -2,6 +2,16 @@
 <html>
 <head>
 <style>
+    body {
+	max-width: 90ch;
+	margin-left: 2ch;
+	margin-right: 2ch;
+	line-height: 1.5em;
+	color: #454545;
+    }
+    h1, h2, h3 {
+	line-height:1.2
+    }
     tt, code {
 	background-color: #ecf0f3;
 	color: #222;
