diff --git a/public/theme/default.css b/public/theme/default.css
index 373ac03..45f489d 100644
--- a/public/theme/default.css
+++ b/public/theme/default.css
@@ -134,6 +134,7 @@ main {
     grid-column: 1 / 4;
     grid-row: 1;
     margin: 16px auto;
+    min-width: 580px;
 }
 
 main > form {