.btn {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 1px solid transparent;
      border-top-color: transparent;
      border-right-color: transparent;
      border-bottom-color: transparent;
      border-left-color: transparent;
    padding: .75rem .75rem;
    font-size: 1.5rem;
    line-height: 2;
    border-radius: .25rem;
    transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
  }
  .btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
  }

  .btn-secondary {
    color: #fff;
    background-color: #5a6268;
    border-color: #545b62;
  }

  .btn-success {
    color: #fff;
    background-color: #218838;
    border-color: #1e7e34;
  }

  .btn-danger {
    color: #fff;
    background-color: #c82333;
    border-color: #bd2130;
  }

  .btn-warning {
    color: #212529;
    background-color: #e0a800;
    border-color: #d39e00;
  }

  .btn-info {
    color: #fff;
    background-color: #138496;
    border-color: #117a8b;
  }