Redesign withdrawal form: step indicator, refined CSS, print button

Add scoped CSS with Navy/warm-white palette, system serif headings, and
card-style radio inputs. Add 3-step progress indicator across all views.
Add print/PDF button on success page. Register CSS via registerStylesheet.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

views/css/index.php

@@ -0,0 +1,8 @@
+<?php
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+header('Location: ../');
+exit;