Update style.css

style.css

@@ -122,14 +122,14 @@ body {
     background-color: #006400; /* Dark Green */
     color: white;
     cursor: pointer;
-    padding: 12px 20px;
+    padding: 12px;
     border-radius: 50%; /* Make it round */
     border: none;
     font-size: 20px;
-    margin: 10px 0;
+    margin: 10px auto;
     height: 50px;
     width: 50px;
-    display: flex;
+    display: block;
     justify-content: center;
     align-items: center;
 }