update challenge modal

src/components/challenge-modal/challenge-modal.module.css

@@ -1,7 +1,5 @@
 .container {
   position: fixed;
-  top: calc(50% - 150px);
-  left: calc(50% - 150px);
   display: block;
   padding: 2px;
   font-size: 10pt;
@@ -10,6 +8,9 @@
   z-index: 999;
   background-color: var(--challenge-modal-background-color);
   border: var(--challenge-modal-border);
+  will-change: transform;
+  backface-visibility: hidden;
+  -webkit-backface-visibility: hidden;
 }
 
 .title {

src/components/challenge-modal/challenge-modal.tsx

@@ -69,7 +69,7 @@ const Challenge = ({ challenge, closeModal }: ChallengeProps) => {
 
   const [{ x, y }, api] = useSpring(() => ({
     x: window.innerWidth / 2 - 150,
-    y: window.innerHeight / 2 - 400,
+    y: window.innerHeight / 2 - 200,
   }));
 
   const bind = useDrag(