Site improvements: nav refactor, CSS readability, hover fixes, remove unverified badges

- Refactored navigation: all 44 pages now use shared includes/nav.php
- Added Free Tools link to navigation (was missing from 29+ pages)
- CSS readability: darker body text (#333), secondary text (#555), bolder hero subtitle
- CSS: darkened link colour (#148a72) for WCAG AA compliance
- CSS: increased stat label font size to 1rem
- Fixed industry-card hover white-on-white text bug
- Removed ICO Registered and Cyber Essentials claims (not yet registered)
- Cache version bumped to v1.1.2

quote.php

@@ -462,29 +462,7 @@ $breadcrumbs = [
     <a href="#main-content" class="skip-to-content">Skip to main content</a>
     
     <!-- Navigation -->
-    <nav class="navbar" id="navbar">
-        <div class="nav-container">
-            <div class="nav-logo">
-                <a href="/">
-                    <img src="assets/images/ukds-main-logo.png" alt="UK Data Services" class="logo">
-                </a>
-            </div>
-            <div class="nav-menu" id="nav-menu">
-                <a href="/" class="nav-link">Home</a>
-                <a href="/#services" class="nav-link">Services</a>
-                <a href="/project-types" class="nav-link">Project Types</a>
-                <a href="/about" class="nav-link">About</a>
-                <a href="/blog/" class="nav-link">Blog</a>
-                <a href="/#contact" class="nav-link">Contact</a>
-                <a href="/quote" class="nav-link cta-button">Request Consultation</a>
-            </div>
-            <div class="nav-toggle" id="nav-toggle">
-                <span class="bar"></span>
-                <span class="bar"></span>
-                <span class="bar"></span>
-            </div>
-        </div>
-    </nav>
+    <?php include($_SERVER["DOCUMENT_ROOT"] . "/includes/nav.php"); ?>
 
     <!-- Quote Hero -->
     <main id="main-content">
@@ -529,7 +507,6 @@ $breadcrumbs = [
         </div>
         <div style="text-align:center;">
             <div style="font-size:2em;">✅</div>
-            <div style="font-size:0.85em;color:#666;">ICO Registered</div>
         </div>
         <div style="text-align:center;">
             <div style="font-size:2em;">⭐</div>