body {
    font-family: var(--bs-body-font-family, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
  }
  
  .container {
    max-width: 960px;
    padding: 15px;
    margin: 0 auto;
  }

  h2 {
    margin-bottom: 20px;
  }

  .mb-3 {
    margin-bottom: 1rem;
  }

  .form-label {
    display: inline-block;
    margin-bottom: 0.5rem;
  }

  .form-control {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  }

  .form-control:focus {
    color: #212529;
    background-color: #fff;
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
  }

  .form-select {
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
  }

  .form-select:focus {
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
  }

  .btn {
    display: inline-block;
    font-weight: 400;
    color: #fff;
    text-align: center;
    vertical-align: middle;
    user-select: none;
    background-color: #0d6efd;
    border: 1px solid #0d6efd;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: 0.25rem;
    cursor: pointer;
  }

  .btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
  }

  .btn-success {
    background-color: #198754;
    border-color: #198754;
  }

  .btn-success:hover {
    background-color: #157347;
    border-color: #146c43;
  }

  .list-group-item {
    padding: 0.75rem 1.25rem;
    margin-bottom: -1px;
    background-color: #fff;
    border: 1px solid rgba(0, 0, 0, 0.125);
  }

  .list-group-item:first-child {
    border-top-left-radius: 0.25rem;
    border-top-right-radius: 0.25rem;
  }

  .list-group-item:last-child {
    border-bottom-right-radius: 0.25rem;
    border-bottom-left-radius: 0.25rem;
  }

  .was-validated .form-control:invalid,
  .was-validated .form-select:invalid {
    border-color: #dc3545;
  }

  .was-validated .form-control:invalid:focus,
  .was-validated .form-select:invalid:focus {
    box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
  }

  .invalid-feedback {
    color: #dc3545;
    display: none;
  }

  .was-validated .invalid-feedback {
    display: block;
  }