diff --git a/assets/styles.css b/assets/styles.css
index 88eb4ec..b7be37c 100644
--- a/assets/styles.css
+++ b/assets/styles.css
@@ -215,7 +215,7 @@ button {
 
 .btn.secondary {
     background-color: rgba(255,255,255,0.5);
-    border: 1px solid rgba(0,0,0,0.3);
+    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.3);
     color: inherit;
 }