fix: Cache-bust hero3d.js and brighten hero text for dark background

Add version query param to hero3d.js script tag to force browsers to
load the updated health economics graphs. Brighten hero subtitle,
description, and stat label text colors for better contrast against
the dark hero background.

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

Author: danribes

css/style.css

@@ -407,15 +407,15 @@ ul {
 
 .hero-subtitle {
     font-size: 2rem;
-    color: var(--text-secondary);
+    color: #e8ecff;
     margin-bottom: 1.5rem;
     font-weight: 600;
     animation: slideInFromTop 1s ease-out;
 }
 
 .hero-description {
     font-size: 1.125rem;
-    color: var(--text-secondary);
+    color: #dce1f5;
     margin-bottom: 2rem;
     line-height: 1.8;
     animation: fadeIn 1.2s ease-out;
@@ -462,7 +462,7 @@ ul {
 
 .stat-label {
     font-size: 0.875rem;
-    color: var(--text-secondary);
+    color: #dce1f5;
     font-weight: 500;
 }
 

index.html

@@ -729,7 +729,7 @@ <h3>Daniel Ribes</h3>
     </footer>
 
     <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
-    <script src="js/hero3d.js"></script>
+    <script src="js/hero3d.js?v=2"></script>
     <script src="js/script.js"></script>
 </body>
 </html>