fix: badge style

Author: qqracha

docs/stylesheets/extra.css

@@ -112,3 +112,14 @@ VitePress-like (dark, purple)
 [data-md-color-scheme="slate"] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover:active {
   background-color: #8f5f7a;
 }
+
+/* ---------- Badge (span.badge) ---------- */
+
+.md-typeset .badge {
+  background: rgba(110, 118, 129, 0.22);
+  border-radius: 4px;
+  color: #D990B9;
+  padding: 0.12em 0.5em;
+  font-size: 0.9em;
+  line-height: 1.2;
+}