subtle bounce effect on print button

pages/index/print-button.css

@@ -18,6 +18,17 @@
   cursor: pointer;
   transition: transform 0.2s ease, box-shadow 0.2s ease;
   z-index: 1000;
+
+  animation: float 2.2s ease-in-out infinite;
+}
+
+@keyframes float {
+  0%, 100% {
+    transform: translateY(0);
+  }
+  50% {
+    transform: translateY(-6px);
+  }
 }
 
 .floating-print-btn:hover {