picocss/docs/scss/utilities/_tooltips.scss

/**
 * Docs: Tooltips
 */

.tooltip-placement {
  display: grid;
  grid-template-columns: 100px 1fr 100px;
  .top, .bottom{
    grid-column-start: 2;
    grid-column-end: 3;
  }
  .left{
    grid-column-start: 1;
    grid-column-end: 2;
  }
  .right{
    grid-column-start: 3;
  }
}