diff --git a/src/windows/customCSS/css/customCSS.css b/src/windows/customCSS/css/customCSS.css
index e8111a05..47bf0d66 100644
--- a/src/windows/customCSS/css/customCSS.css
+++ b/src/windows/customCSS/css/customCSS.css
@@ -7,6 +7,14 @@ html {
 body {
     font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
     background: #212222 !important;
+    display: flex;
+    flex-direction: column;
+}
+
+.main,
+.container-after-titlebar {
+    display: flex;
+    flex-direction: column;
 }
 
 body {
@@ -36,7 +44,7 @@ body {
 .cssarea {
     overflow-x: hidden;
     overflow-y: scroll;
-    height: 64.75vh;
+    flex-grow: 1;
     margin: 0 !important;
 }