diff --git a/src/browser/styles/globals.css b/src/browser/styles/globals.css
index 850f41e622..9c76f0e48e 100644
--- a/src/browser/styles/globals.css
+++ b/src/browser/styles/globals.css
@@ -1,4 +1,12 @@
 @import "tailwindcss";
+
+/* Disable the default browser focus outline (the blue ring).
+   Components can still use intentional focus styles like border-color changes. */
+*:focus,
+*:focus-visible {
+  outline: none;
+}
+
 @source "../node_modules/streamdown/dist/index.js";
 
 /* Geist Font Declarations */