body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #ffffff;
  }
  .card {
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
  }
  .card-header {
    background-color: #16163f;
    color: #fff;
  }
  .btn-primary {
    background-color: #16163f;
    border-color: #16163f;
  }
  .btn-primary:hover {
    background-color: #16163f;
    border-color: #16163f;
  }
  .btn-link {
    color: #4183b8;
  }