diff --git a/public/invoice-view.js b/public/invoice-view.js
index 3ebd91c..dcc84ce 100644
--- a/public/invoice-view.js
+++ b/public/invoice-view.js
@@ -244,7 +244,7 @@ function renderInvoiceRow(invoice) {
     if (hasQbo && !paid) {
         const isSent = invoice.email_status === 'sent';
         if (isSent) {
-            sendBtn = `<button onclick="window.invoiceView.setEmailStatus(${invoice.id}, 'open')" class="text-gray-400 hover:text-gray-600 text-xs" title="Mark as not sent">✉️ Sent</button>`;
+            sendBtn = `<span class="text-green-600 text-xs" title="Marked as sent">✉️ Sent</span>`;
         } else {
             sendBtn = `<button onclick="window.invoiceView.setEmailStatus(${invoice.id}, 'sent')" class="text-indigo-600 hover:text-indigo-800 text-xs" title="Mark as sent to customer">📤 Mark Sent</button>`;
         }