Update markdown-dark.css

Author: benhatsor

live-view/extensions/markdown/markdown-dark.css

@@ -27,6 +27,12 @@
   background: rgba(255, 255, 255, 0.15);
 }
 
+:focus-visible {
+  box-shadow: 0 0 0 2px hsl(223deg 86% 64% / 50%);
+  outline: none;
+  border-radius: 2px;
+}
+
 
 html {
   background: var(--bg-color);