diff --git a/src/globals/dom.ts b/src/globals/dom.ts
index f419a6b..fba7675 100644
--- a/src/globals/dom.ts
+++ b/src/globals/dom.ts
@@ -37,6 +37,21 @@ export function getCheckboxActive(): HTMLInputElement {
   );
 }
 
+export function getDivCanvasContainer(): HTMLDivElement {
+  return getElement<HTMLDivElement>(
+    'divCanvasContainer',
+    'div',
+    {
+      position: 'fixed',
+      width: 'calc( 100% - 240px )',
+      height: 'calc( 100% - 240px )',
+      left: '0',
+      top: '0',
+      display: 'flex',
+    },
+  );
+}
+
 export function getDivAutomaton(): HTMLDivElement {
   return getElement<HTMLDivElement>(
     'divAutomaton',
diff --git a/src/main.ts b/src/main.ts
index c735366..2a09025 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -2,7 +2,7 @@ import { canvas } from './globals/canvas';
 import { BufferRenderTarget } from './heck/BufferRenderTarget';
 import { Component } from './heck/components/Component';
 import { music } from './globals/music';
-import { getCheckboxActive } from './globals/dom';
+import { getCheckboxActive, getDivCanvasContainer } from './globals/dom';
 import { dog } from './scene';
 
 // == music ========================================================================================
@@ -18,10 +18,13 @@ if ( process.env.DEV ) {
   document.body.style.background = '#000';
   document.body.style.width = '100%';
 
-  document.body.appendChild( canvas );
-  canvas.style.left = '0';
-  canvas.style.top = '0';
-  canvas.style.width = 'calc( 100% - 240px )';
+  const divCanvasContainer = getDivCanvasContainer();
+
+  divCanvasContainer.appendChild( canvas );
+  ( canvas.style as any ).aspectRatio = 'auto 1920 / 1080';
+  canvas.style.margin = 'auto';
+  canvas.style.maxWidth = '100%';
+  canvas.style.maxHeight = '100%';
 } else {
   canvas.style.position = 'fixed';
   canvas.style.left = '0';