diff --git a/static/styles/portico/integrations_dev_panel.css b/static/styles/portico/integrations_dev_panel.css
index 8468af9f3e..9e6651770d 100644
--- a/static/styles/portico/integrations_dev_panel.css
+++ b/static/styles/portico/integrations_dev_panel.css
@@ -10,6 +10,34 @@
     padding: 20px 10px 15px;
     background-color: hsla(0, 0%, 100%, 0.48);
     box-shadow: 0 0 40px hsla(0, 0%, 0%, 0.06);
+
+    textarea {
+        color: hsl(0, 0%, 33%);
+        background-color: hsl(0, 0%, 100%);
+        border-radius: 4px;
+        vertical-align: middle;
+        border: 1px solid hsl(0, 0%, 80%);
+        padding: 4px 6px;
+        margin-bottom: 10px;
+
+        font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+        font-size: 14px;
+
+        box-shadow: inset 0 1px 1px hsla(0, 0%, 0%, 0.075);
+        transition: border linear 0.2s, box-shadow linear 0.2s;
+
+        &:focus {
+            border-color: hsla(206.5, 80%, 62%, 0.8);
+            outline: 0;
+
+            box-shadow: inset 0 1px 1px hsla(0, 0%, 0%, 0.075),
+                0 0 8px hsla(206.5, 80%, 62%, 0.6);
+        }
+
+        &:read-only {
+            cursor: not-allowed;
+        }
+    }
 }
 
 #fixture_body {