Switch contact form to self-hosted SMTP via nodemailer, remove formsubmit.co

src/App.css

@@ -572,6 +572,20 @@
   margin-top: 0.25rem;
 }
 
+.contact-form .btn-primary:disabled {
+  opacity: 0.55;
+  cursor: not-allowed;
+  transform: none;
+}
+
+.contact-error {
+  font-family: 'Barlow Condensed', sans-serif;
+  font-size: 0.95rem;
+  color: #e05c5c;
+  margin: 0;
+  padding: 0;
+}
+
 .contact-honeypot {
   position: absolute;
   left: -9999px;