diff --git a/assets/css/content.css b/assets/css/content.css
index 7d70698..c189040 100644
--- a/assets/css/content.css
+++ b/assets/css/content.css
@@ -13,6 +13,10 @@
     color: white;
     text-decoration-line: unset;
     border-radius: 4px;
+    border-style: solid;
+    border-width: 1px;
+    border-color: black;
+    box-sizing: border-box;
 }
 
 .secondary-action {
@@ -22,6 +26,7 @@
     padding: 0.8em;
     text-decoration-line: unset;
     border-radius: 4px;
+    box-sizing: border-box;
 }
 
 @media screen and (max-width: 768px) {