grid4

src/App.css

@@ -103,6 +103,9 @@ hr {
 }
 
 @media screen and (min-width: 780px) {
+  .grid-container {
+    grid-template-columns: 33.3% 33.3% 33.3%;
+  }
   .grid-container>div {
     height: 50vh;
     overflow: hidden;