Fixed some styling issues

style.css

@@ -13,7 +13,8 @@
   .display {
     width: 80vw;
     max-width: 500px;
-    margin-top: 12rem;
+    height: 240px;
+    margin: 12rem auto;
     background: linear-gradient(to bottom right, #0c024d, #0dbcc5);
     background-attachment: fixed;
     color: white;
@@ -91,9 +92,6 @@
   }
 
   .footer {
-    display: block;
-    position: relative;
-    top: 30rem;
     text-align: center;
     font-size: 0.8rem;
     margin: 2rem auto;