style.css

h1 {
    text-align: center;
  }
  
  #duplicate-button {
    margin: auto;
    color: white;
    background: #1565c0;
    border-radius: 100vh;
  }
  
  .contain {
    max-width: 900px;
    margin: auto;
    padding-top: 1.5rem;
  }