Move Columns block styles to theme.json.

style.css

@@ -158,17 +158,3 @@ textarea {
 .wp-block-navigation :where(.wp-block-navigation__submenu-container) a {
 	padding: 2px 10px;
 }
-
-/* Media Queries
----------------------------------------------------------------------------- */
-
-@media only screen and (max-width: 780px) {
-
-	/* Columns
-	--------------------------------------------- */
-
-	.is-style-columns-reverse {
-		flex-direction: column-reverse;
-	}
-
-}

theme.json

@@ -315,6 +315,9 @@
 					"fontSize": "var(--wp--preset--font-size--small)"
 				}
 			},
+			"core/columns": {
+				"css": ".is-style-columns-reverse {@media only screen and (max-width: 780px) {flex-direction: column-reverse;}}"
+			},
 			"core/comment-author-name": {
 				"typography": {
 					"fontSize": "var(--wp--preset--font-size--small)",