body {
    background-color: black;
    color: white;
    margin: 0;
    padding: 0;
    font-family:Verdana, Geneva, Tahoma, sans-serif;
  }
  
  h1 {
    margin: 10px 0;
    padding: 10px;
  }
  
  #app {
    padding: 20px;
  }