Update css

css

@@ -19,12 +19,14 @@
  .card:hover,.answer:hover {
     background-color: #eee;
     cursor: pointer;
+  
   }
   #message {
     margin-top: 20px;
     padding: 10px;
     background-color: #f0f0f0;
     border: 1px solid #ccc;
+    text-align: center;
   }
   .container {
     position: relative;