scss: highlight tr target and add some scroll-margin-top

Signed-off-by: Luca Zeuch <[email protected]>

Author: l-zeuch

assets/scss/common/_custom.scss

@@ -9,6 +9,14 @@ a.broken {
     text-decoration: underline;
 }
 
+:target {
+  scroll-margin-top: 10rem;
+  * {
+    // slightly transparent yellow
+    background: rgba(255, 255, 0, 0.3);
+  }
+}
+
 // Reduce spacing between cards on the homepage.
 .home .card {
   margin-top: 2rem;