html, body {
    height: 100%;
  }
  body {
    margin: 0;
    /* background-color: #ddd; */
    padding: 0;
  }
  
  main{
    height: 100%;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }