css, further de-dupe mobile code.

pages/helpers/main.css

@@ -41,8 +41,6 @@
 			/* Phones */
 			@media (max-width: 767px) {
 				[class*="col-"] {
-					float: none;
-					display: block;
 					width: 100%;
 				}
 			}
@@ -50,14 +48,16 @@
 			/* Tablets */
 			@media (min-width: 768px) and (max-width: 1023px) {
 				[class*="col-"] {
-					float: none;
-					display: block;
 					width: 50%;
 				}
 			}
 
 			/* Both */
 			@media (max-width: 1023px) {
+				[class*="col-"] {
+					float: none;
+					display: block;
+				}
 				.banner-image { display: none; }
 			}