diff --git a/code/services-core/control-service/src/main/java/nu/marginalia/control/ControlRendererFactory.java b/code/services-core/control-service/src/main/java/nu/marginalia/control/ControlRendererFactory.java
index 06f7c7e2..47b7976d 100644
--- a/code/services-core/control-service/src/main/java/nu/marginalia/control/ControlRendererFactory.java
+++ b/code/services-core/control-service/src/main/java/nu/marginalia/control/ControlRendererFactory.java
@@ -34,6 +34,7 @@ public class ControlRendererFactory {
             baseRenderer.render(context,
                     Map.of("global-context",
                             Map.of(
+                            "appBorder", System.getProperty("control.appBorder", "none;"),
                             "nodes", nodeConfigurationService.getAll(),
                             "hideMarginaliaApp", Boolean.getBoolean("control.hideMarginaliaApp")
                             )
diff --git a/code/services-core/control-service/src/main/resources/templates/control/partials/head-includes.hdb b/code/services-core/control-service/src/main/resources/templates/control/partials/head-includes.hdb
index 2725fca9..e7c10d09 100644
--- a/code/services-core/control-service/src/main/resources/templates/control/partials/head-includes.hdb
+++ b/code/services-core/control-service/src/main/resources/templates/control/partials/head-includes.hdb
@@ -1,4 +1,9 @@
 <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
 <link rel="stylesheet" href="/tables.css" />
 <link rel="stylesheet" href="/noanimation.css" />
-<meta name="viewport" content="width=device-width, initial-scale=1.0" />
\ No newline at end of file
+<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<style type="text/css">
+body {
+    border: {{{global-context.appBorder}}};
+}
+</style>
\ No newline at end of file