diff --git a/static/styles/lightbox.scss b/static/styles/lightbox.scss
index 2d14c5fd83..b5c4a0d5dd 100644
--- a/static/styles/lightbox.scss
+++ b/static/styles/lightbox.scss
@@ -207,56 +207,58 @@
     }
 }
 
-#lightbox_overlay .center .arrow {
-    display: inline-block;
-    vertical-align: top;
-    margin-top: 25px;
-    padding: 5px 10px;
+#lightbox_overlay .center {
+    .arrow {
+        display: inline-block;
+        vertical-align: top;
+        margin-top: 25px;
+        padding: 5px 10px;
 
-    color: hsl(0, 0%, 100%);
-    font-size: 1.8em;
-    font-weight: 100;
+        color: hsl(0, 0%, 100%);
+        font-size: 1.8em;
+        font-weight: 100;
 
-    transform: scaleY(2);
-    cursor: pointer;
+        transform: scaleY(2);
+        cursor: pointer;
 
-    opacity: 0.5;
-    transition: all 0.3s ease;
-}
+        opacity: 0.5;
+        transition: all 0.3s ease;
 
-#lightbox_overlay .center .arrow:hover {
-    opacity: 1;
-}
+        &:hover {
+            opacity: 1;
+        }
+    }
 
-#lightbox_overlay .center .image-list {
-    position: relative;
-    display: inline-block;
-    padding: 15px 0px 12px 0px;
-    height: 50px;
-    font-size: 0px;
+    .image-list {
+        position: relative;
+        display: inline-block;
+        padding: 15px 0px 12px 0px;
+        height: 50px;
+        font-size: 0px;
 
-    max-width: 40vw;
-    overflow: hidden;
-    white-space: nowrap;
-}
+        max-width: 40vw;
+        overflow: hidden;
+        white-space: nowrap;
 
-#lightbox_overlay .center .image-list .image {
-    display: inline-block;
-    vertical-align: top;
-    width: 50px;
-    height: 50px;
-    margin: 0px 2px;
+        .image {
+            display: inline-block;
+            vertical-align: top;
+            width: 50px;
+            height: 50px;
+            margin: 0px 2px;
 
-    background-color: hsla(0, 0%, 94%, 0.2);
-    opacity: 0.5;
+            background-color: hsla(0, 0%, 94%, 0.2);
+            opacity: 0.5;
 
-    background-size: cover;
-    background-position: center;
-    cursor: pointer;
-}
+            background-size: cover;
+            background-position: center;
+            cursor: pointer;
 
-#lightbox_overlay .center .image-list .image.selected {
-    opacity: 1;
+            &.selected {
+                opacity: 1;
+            }
+        }
+    }
 }
 
 #lightbox_overlay .image-actions .button {