Update style.css

style.css

@@ -91,7 +91,10 @@ body {
     border: none;
     margin: 0 10px;
     transition: background-color 0.3s;
-    font-size: 20px; /* Modern font size */
+    font-size: 18px;
+    display: flex;
+    justify-content: center;
+    align-items: center;
 }
 
 #swap-btn:hover {