Fix sideways scroll on phones: clip the hero glow on narrow screens; v2.23.1

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/App.css

@@ -328,6 +328,13 @@
   justify-content: center;
 }
 
+/* The glow behind the artwork is larger than its box; on narrow screens that made the page wider than the screen */
+@media (max-width: 900px) {
+  .hero {
+    overflow-x: clip;
+  }
+}
+
 @keyframes glow-pulse {
   0%, 100% { opacity: 0.96; transform: scale(1); }
   50% { opacity: 0.72; transform: scale(1.2); }