doc: add scroll margin to links

PR-URL: #58982
Reviewed-By: Claudio Wunder <cwunder@gnome.org>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: Tierney Cyren <hello@bnb.im>

Author: silverwind

doc/api_assets/style.css

@@ -369,6 +369,11 @@ p {
   padding-bottom: 2rem;
 }
 
+/* prevent the module-level sticky stability header from overlapping the section headers when clicked */
+#apicontent:has(> .api_stability) a {
+  scroll-margin-top: 50px;
+}
+
 table {
   border-collapse: collapse;
   margin: 0 0 1.5rem;
@@ -830,6 +835,12 @@ kbd {
     position: relative;
     top: 0;
   }
+  .api_stability {
+    top: 0;
+  }
+  #apicontent a {
+    scroll-margin-top: 0;
+  }
 }
 
 @media not screen, (max-height: 1000px) {