Change title markers to squares

themes/custom/assets/style.scss

@@ -50,13 +50,16 @@
     content: "";
 }
 
-.content h2:before,
+@media screen and (min-width: $desktop) {
-.content h3:before {
+    .content h2:before,
-    content: "#";
+    .content h3:before {
-    color: $grey;
+        content: "◼";
-    position: absolute;
+        color: lighten($background-base-color, 6);
-    left: 0;
+        position: absolute;
-    margin-left: -2rem;
+        left: 0;
+        margin-left: -2.5rem;
+        line-height: 1em;
+    }
 }
 
 .message {