lottery/resources/scss/vue/bootstrap-vue/_spin-button.scss

// Override input's form-control style
.b-form-spinbutton {
  &.form-control {
    padding: 0;
    &:focus,
    &.focus {
      border-color: $primary;
      box-shadow: none;
    }
    &.is-valid,
    &.is-invalid {
      padding-right: calc(1.5em + 0.75rem);
    }
    .btn-sm {
      padding: 0.25rem 0.5rem;
    }
  }
  &.form-control-sm {
    output > bdi {
      height: 0.9rem;
    }
  }
}