Comprehensive SEO and UI improvements across site

SEO Improvements:
- Add Twitter/OG meta tags to gdpr-compliance.php and terms-of-service.php
- Add author bios with E-E-A-T signals to all blog articles
- Add breadcrumb schema markup to key pages
- Create new service pages: price-monitoring.php, competitive-intelligence.php
- Create location pages: london.php, manchester.php, birmingham.php
- Update sitemap.xml with new pages

UI/CSS Improvements:
- Move testimonials section from inline styles to CSS classes
- Standardize hero gradients to #144784 → #179e83 across all pages
- Unify card border styles to border-left: 4px solid #179e83
- Fix CTA gradient direction consistency on location pages
- Standardize breadcrumb colors to #144784
- Replace all purple accent colors (#667eea, #764ba2) with brand colors
- Add CSS variables for brand consistency in main.css

Code Cleanup:
- Delete 6 emergency CSS fix files (button-emergency-fix.css, etc.)
- Remove related-articles-fix.css references from blog articles
- Consolidate styles into main.css

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

admin/view-submissions.php

@@ -26,7 +26,7 @@ if (!isset($_SESSION['authenticated']) || $_SESSION['authenticated'] !== true) {
                 body { font-family: Arial, sans-serif; background: #f5f5f5; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; }
                 .login-form { background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
                 input[type="password"] { padding: 10px; width: 200px; margin-bottom: 10px; }
-                button { padding: 10px 20px; background: #667eea; color: white; border: none; border-radius: 4px; cursor: pointer; }
+                button { padding: 10px 20px; background: #179e83; color: white; border: none; border-radius: 4px; cursor: pointer; }
                 .error { color: red; margin-bottom: 10px; }
             </style>
         </head>
@@ -133,7 +133,7 @@ if (isset($_GET['export']) && $_GET['export'] === 'csv') {
         .stat-value {
             font-size: 36px;
             font-weight: bold;
-            color: #667eea;
+            color: #179e83;
         }
         .stat-label {
             color: #666;
@@ -162,7 +162,7 @@ if (isset($_GET['export']) && $_GET['export'] === 'csv') {
             font-size: 14px;
         }
         .submission-email {
-            color: #667eea;
+            color: #179e83;
             font-weight: 500;
         }
         .submission-details {
@@ -184,7 +184,7 @@ if (isset($_GET['export']) && $_GET['export'] === 'csv') {
         }
         .btn {
             padding: 10px 20px;
-            background: #667eea;
+            background: #179e83;
             color: white;
             text-decoration: none;
             border-radius: 4px;