diff --git a/frontend/src/App.css b/frontend/src/App.css
index c618b52c..afc3eb81 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -4,6 +4,11 @@
   box-sizing: border-box;
 }
 
+html, body {
+  height: 100%;
+  overflow: hidden;
+}
+
 body {
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
   background-color: #1a1a1a;
diff --git a/frontend/src/components/simulator/SimulatorCanvas.css b/frontend/src/components/simulator/SimulatorCanvas.css
index 7b40171f..c32a9d06 100644
--- a/frontend/src/components/simulator/SimulatorCanvas.css
+++ b/frontend/src/components/simulator/SimulatorCanvas.css
@@ -168,9 +168,6 @@
   top: 0;
   left: 0;
   transform-origin: 0 0;
-  /* min size so content is reachable even when empty */
-  width: 4000px;
-  height: 3000px;
 }
 
 /* ── Components area ─────────────────────────────── */