improve the scroll buttons ui

Author: medyo

src/App.css

@@ -757,17 +757,20 @@ Producthunt item
 .scrollButton {
   border:none;
   position: fixed;
-  top: 50%;
+  top: 45%;
   margin: 0 1%;
   background-color: var(--card-action-button-background);
   color: var(--card-action-button-color);
   opacity: .8;
-  border-radius: 50px;
-  width: 50px;
-  height: 50px;
+  border-radius: 48px;
+  width: 48px;
+  height: 48px;
   box-shadow: 0 0 20px var(--card-border-color);
   z-index: 2;
   cursor: pointer;
+  align-items: center;
+  justify-content: center;
+  display: flex;
 }
 
 .scrollButton:hover {