diff --git a/static/rouen/_custom.scss b/static/rouen/_custom.scss
index 6066dd2..b4af543 100644
--- a/static/rouen/_custom.scss
+++ b/static/rouen/_custom.scss
@@ -547,7 +547,7 @@ body.page-index #columns {
 		grid-template-columns: 1fr 1fr;
 	}
 
-	#left, #right {
+	.column {
 		float: none;
 		width: inherit;
 	}
@@ -564,7 +564,7 @@ body.page-index #columns {
 
 	.description, .intro { display: none; }
 
-	#left .cell:nth-child(2n), #right .cell:nth-child(2n+1) {
+	.column:first-child .cell:nth-child(2n), .column:last-child .cell:nth-child(2n+1) {
 		h2 { background-color: #F4A7AA; }
 		a {
 			background-color: #FCE4E5;
@@ -573,7 +573,7 @@ body.page-index #columns {
 		li.required-authentication a::after { color: #c64a59; }
 	}
 
-	#left .cell:nth-child(2n+1), #right .cell:nth-child(2n) {
+	.column:first-child .cell:nth-child(2n+1), .column:last-child .cell:nth-child(2n) {
 		h2 { background-color: #82cebb; }
 		a {
 			background-color: #D8F0EA;