feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex-site/visual-data-collection-pricing.html

@@ -77,7 +77,7 @@
             background: #e94560;
             color: white;
             padding: 1rem 2rem;
-            border-radius: 8px;
+            border-radius: var(--radius-md);
             text-decoration: none;
             font-weight: 600;
             margin: 0.5rem;
@@ -107,7 +107,7 @@
         .pricing-card {
             background: white;
             border: 2px solid #e0e0e0;
-            border-radius: 12px;
+            border-radius: var(--radius-md);
             padding: 2rem;
             text-align: center;
             transition: transform 0.3s, box-shadow 0.3s;
@@ -129,7 +129,7 @@
             background: #e94560;
             color: white;
             padding: 0.25rem 1rem;
-            border-radius: 20px;
+            border-radius: var(--radius-xl);
             font-size: 0.8rem;
             font-weight: 600;
         }
@@ -158,7 +158,7 @@
             border-bottom: 1px solid #f0f0f0;
         }
         .pricing-features li::before {
-            content: "✓ ";
+            content: "<svg width="16" height="16" viewBox="0 0 16 16" fill="none"><path d="M3 8L6.5 11.5L13 4.5" stroke="#22c55e" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg> ";
             color: #4caf50;
             font-weight: bold;
         }
@@ -194,7 +194,7 @@
             margin: 0 auto;
             background: #f8f9fa;
             padding: 2rem;
-            border-radius: 12px;
+            border-radius: var(--radius-md);
         }
         .form-group {
             margin-bottom: 1.5rem;
@@ -209,14 +209,14 @@
             width: 100%;
             padding: 0.75rem;
             border: 1px solid #ddd;
-            border-radius: 6px;
+            border-radius: var(--radius-sm);
             font-size: 1rem;
         }
         .estimate-result {
             background: #1a1a2e;
             color: white;
             padding: 1.5rem;
-            border-radius: 8px;
+            border-radius: var(--radius-md);
             margin-top: 2rem;
             text-align: center;
         }
@@ -233,7 +233,7 @@
             margin-bottom: 1.5rem;
             padding: 1.5rem;
             background: white;
-            border-radius: 8px;
+            border-radius: var(--radius-md);
         }
         
         .cta-section {