1 files changed, 12 insertions, 3 deletions
diff --git a/demo/src/less/layout/core.less b/demo/src/less/layout/core.less
index dc177088..7f1a93e4 100644
--- a/demo/src/less/layout/core.less
+++ b/demo/src/less/layout/core.less
@@ -2,12 +2,21 @@
 // Core
 // ==========================================================================
 
-html {
-    background: @page-background;
-    background-attachment: fixed;
+*,
+*::after,
+*::before {
+    box-sizing: border-box;
+}
+
+html,
+body {
+    display: flex;
+    width: 100%;
 }
 
 html {
+    background: @page-background;
+    background-attachment: fixed;
     height: 100%;
 }