html,
body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  font-family: arial;
  background-color: #111E;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}