diff --git a/_static/css/custom.css b/_static/css/custom.css
index 08e28d2b5..b8e34572a 100644
--- a/_static/css/custom.css
+++ b/_static/css/custom.css
@@ -33,7 +33,6 @@
     --link-color-visited: #9b59b6;
     --class-reference-icon: url("data:image/svg+xml;base64,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");
     --external-reference-icon: url("data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjEyIiB3aWR0aD0iMTIiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGcgZmlsbD0ibm9uZSIgc3Ryb2tlPSIjMjk4MGI5Ij48cGF0aCBkPSJtNy41IDcuMXYzLjRoLTZ2LTZoMy40Ii8+PHBhdGggZD0ibTUuNzY1IDFoNS4yMzV2NS4zOWwtMS41NzMgMS41NDctMS4zMS0xLjMxLTIuNzI0IDIuNzIzLTIuNjktMi42ODggMi44MS0yLjgwOC0xLjMxMy0xLjMxeiIvPjwvZz48L3N2Zz4K");
-    --classref-badge-text-color: hsl(0, 0%, 45%);
 
     --hr-color: #e1e4e5;
     --table-row-odd-background-color: #f3f6f6;
@@ -128,7 +127,6 @@
         --link-color-visited: #cb99f6;
         --class-reference-icon: url("data:image/svg+xml;base64,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");
         --external-reference-icon: url("data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjEyIiB3aWR0aD0iMTIiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGcgZmlsbD0ibm9uZSIgc3Ryb2tlPSIjOGNmIj48cGF0aCBkPSJtNy41IDcuMXYzLjRoLTZ2LTZoMy40Ii8+PHBhdGggZD0ibTUuNzY1IDFoNS4yMzV2NS4zOWwtMS41NzMgMS41NDctMS4zMS0xLjMxLTIuNzI0IDIuNzIzLTIuNjktMi42ODggMi44MS0yLjgwOC0xLjMxMy0xLjMxeiIvPjwvZz48L3N2Zz4K");
-        --classref-badge-text-color: hsl(0, 0%, 70%);
 
         --hr-color: #555;
         --table-row-odd-background-color: #3b3e41;
@@ -315,14 +313,15 @@ a.btn:hover {
     padding-right: 13px;
 }
 
-/* Distinguish class reference page links from "user manual" page links with a "ref" badge. */
-a[href*="classes/"] {
+/* Distinguish class reference page links from "user manual" page links with a class reference badge. */
+
+/* Remove text wrapping so that the badge is always on the same line as the anchor's text. */
+.rst-content a[href*="classes/"] {
     white-space: nowrap;
 }
-
-a[href*="classes/"]::after {
+/* Add an icon as a badge, after the anchor's text. */
+.rst-content a[href*="classes/"]::after {
     content: "";
-    color: var(--classref-badge-text-color);
     background-image: var(--class-reference-icon);
     display: inline-block;
     height: 16px;
@@ -331,27 +330,15 @@ a[href*="classes/"]::after {
     margin-left: 0.25rem;
 }
 
-/* Prevent the "ref" badge from appearing twice in the instant search results (not testable locally). */
-.wy-body-for-nav .search__result__single a[href*="classes/"]::before {
+/* Prevent the class reference badge from appearing twice in the instant search results (not testable locally). */
+.wy-body-for-nav .search__result__single a[href*="classes/"]::after {
     display: none;
 }
-
-.wy-body-for-nav .search__result__single a[href*="classes/"]:first-child::before {
-    display: inline;
+.wy-body-for-nav .search__result__single a[href*="classes/"]:first-child::after {
+    display: inline-block;
 }
-
-/* Prevent the "ref" badge from appearing several times per item in the dedicated search results page. */
-#search-results .context a[href*="classes/"]::before {
-    display: none;
-}
-
-/* Prevent the "ref" badge from appearing in the sidebar. */
-.wy-menu-vertical a[href*="classes/"]::before {
-    display: none;
-}
-
-/* Prevent the "ref" badge from appearing on Read the Docs inside of the version selector. */
-.rst-versions a[href*="classes/"]::before {
+/* Prevent the class reference badge from appearing several times per item in the dedicated search results page. */
+#search-results .context a[href*="classes/"]::after {
     display: none;
 }
 
diff --git a/conf.py b/conf.py
index 9f1c9223b..31f22085e 100644
--- a/conf.py
+++ b/conf.py
@@ -189,14 +189,14 @@ html_extra_path = ["robots.txt"]
 html_css_files = [
     'css/algolia.css',
     'https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css',
-    "css/custom.css?1",
+    "css/custom.css?2", # Increment the number at the end when the file changes to bust the cache.
 ]
 
 if not on_rtd:
     html_css_files.append("css/dev.css")
 
 html_js_files = [
-    "js/custom.js?1",
+    "js/custom.js?1", # Increment the number at the end when the file changes to bust the cache.
     ('https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js', {'defer': 'defer'}),
     ('js/algolia.js', {'defer': 'defer'})
 ]