* {
    box-sizing: border-box;
  }
  
  html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    text-align: center;
    height: 100%;
    margin: 0;
    padding: 0;
  }
  
  body {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }