css, fix row behavior for banner.

pages/helpers/main.css

@@ -38,7 +38,7 @@
 
 			/* Handle mobile devices a bit better, making columns break out as rows. */
 
-			.banner-desktop { display: block; }
+			.banner-desktop { display: flex; }
 			.banner-mobile { display: none; }
 
 			/* Phones */
@@ -66,7 +66,7 @@
 				}
 				.banner-image {display: none; }
 				.banner-desktop { display: none; }
-				.banner-mobile { display: block; }
+				.banner-mobile { display: flex; }
 			}
 
 				/* Desktop */