diff --git a/core.css b/core.css
index 549ca6e..6593343 100644
--- a/core.css
+++ b/core.css
@@ -11,6 +11,7 @@ body {
   display: flex;
   justify-content: center;
   line-height: 1.5;
+  height: 100%;
 }
 
 h1,