diff --git a/assets/scss/bergamot.scss b/assets/scss/bergamot.scss
index cabff5a..13d54bf 100644
--- a/assets/scss/bergamot.scss
+++ b/assets/scss/bergamot.scss
@@ -55,6 +55,14 @@
         overflow: auto;
     }
 
+    .bergamot-error {
+        @include bordered-block;
+        padding: 0.5rem;
+        border-color: tomato;
+        background-color: rgba(tomato, 0.25);
+        margin-top: 1rem;
+    }
+
     .bergamot-selector {
         button {
             @include var(background-color, background-color);