* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html, body {
    height: 100%;
  }
  
  body {
    background-color: #000;
    color: #fff;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .message {
    text-align: center;
    font-size: 2rem;
  }