Add fieldset styles for improved form layout and consistency

Author: moses77-boop

Form-Controls/style.css

@@ -31,4 +31,10 @@ h1{
 .intro{
     color:#444;
     margin-bottom: 2rem;
+}
+fieldset{
+    border: 1px solid var(--color-border);
+    border-radius: var(--radius);
+    padding: 1rem 1.25rem 1.25rem;
+    margin: 0 0 1.5rem;
 }