diff --git a/src/scheduler/templates/gallery.html b/src/scheduler/templates/gallery.html
index 07fc89b..10479ed 100644
--- a/src/scheduler/templates/gallery.html
+++ b/src/scheduler/templates/gallery.html
@@ -8,7 +8,7 @@
             font-family: Arial, sans-serif;
             margin: 0;
             padding: 0;
-            background-color: #333;
+            background-color: black;
             color: #fff;
         }
 
@@ -20,8 +20,8 @@
         }
 
         .gallery-item {
-            flex: 0 1 calc(33.3333% - 20px);
-            margin: 4px;
+            flex: 0 1 calc(25% - 20px);
+            margin: 0px;
             overflow: hidden;
             position: relative;
             cursor: pointer;