Various style updates

src/components/ScrollUpButton.tsx

@@ -28,10 +28,9 @@ export default function ScrollUpButton() {
 
   return (
     <button
-      type="button"
       onClick={scrollToTop}
-      class={`fixed bottom-20 right-4 z-20 bg-secondary hover:bg-primary
-            p-3 rounded-full transition-all duration-300 min-h-[44px] min-w-[44px] inline-flex items-center justify-center
+      class={`fixed bottom-4 right-4 z-20 bg-secondary hover:bg-primary
+            btn btn-circle transition-all duration-300
             ${
               isVisible.value
                 ? "opacity-100 translate-y-0"