diff -ruN cell/public/index.html cell2/public/index.html
--- cell/public/index.html
+++ cell2/public/index.html
@@ -1,6 +1,7 @@
 <html>
   <head>
     <meta charset="utf-8" />
+    <meta http-equiv="Content-Security-Policy" content="default-src 'self'; img-src 'self' data: blob:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self' 'unsafe-inline'; connect-src 'self'" />
     <link rel="stylesheet" href="main.css" />
     <link rel="shortcut icon" href="./favicon.png">
     <title>Cellular: Automata</title>
diff -ruN cell/public/main.css cell2/public/main.css
--- cell/public/main.css
+++ cell2/public/main.css
@@ -3,9 +3,7 @@
   font-style: normal;
   font-weight: 400;
   font-display: swap;
-  src: url("./DidactGothic.woff") format("woff"),
-    url(https://fonts.gstatic.com/s/didactgothic/v13/ahcfv8qz1zt6hCC5G4F_P4ASlUuYpg.woff2)
-      format("woff2");
+  src: url("./DidactGothic.woff") format("woff");
 }
 
 body,