add padding to front page events on mobile

src/css/events.scss

@@ -13,6 +13,10 @@
   justify-content: center;
 }
 
+.event-group {
+  padding: 0 1rem 1rem;
+}
+
 .event-grouped-by-day {
   .event-types, .event-group-header {
     display: none;