discourse/app/assets/stylesheets/common/float-kit/d-button-tooltip.scss

.fk-d-button-tooltip {
  display: inline-flex;
  align-items: center;

  .fk-d-tooltip__trigger {
    background: var(--primary-very-low);
    height: 100%;
    align-items: center;
    display: flex;
    padding-inline: 0.5rem;
  }
}