style: clarify clickable code examples

Author: aleksnick

styles.css

@@ -497,6 +497,16 @@ img {
   border: 1px solid var(--line);
   border-radius: 1.4rem;
   background: rgba(255, 255, 255, 0.02);
+  cursor: pointer;
+  transition:
+    border-color 0.2s ease,
+    background-color 0.2s ease,
+    transform 0.2s ease;
+}
+
+.code-example:hover {
+  border-color: rgba(255, 255, 255, 0.16);
+  background: rgba(255, 255, 255, 0.03);
 }
 
 .code-example-summary {