excalidraw/src/components/Tooltip.scss

@import "../css/variables.module";
.excalidraw {
  .Tooltip {
    position: relative;
  }

  .Tooltip__label {
    --arrow-size: 4px;
    visibility: hidden;
    background: $oc-black;
    color: $oc-white;
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 10;
    font-size: 13px;
    line-height: 1.5;
    font-weight: 500;
    // extra pixel offset for unknown reasons
    left: calc(50% + var(--arrow-size) / 2 - 1px);
    transform: translateX(-50%);
    word-wrap: break-word;

    &::after {
      content: "";
      border: var(--arrow-size) solid transparent;
      position: absolute;
      left: calc(50% - var(--arrow-size));
    }

    &--above {
      bottom: calc(100% + var(--arrow-size) + 3px);

      &::after {
        border-top-color: $oc-black;
        top: 100%;
      }
    }

    &--below {
      top: calc(100% + var(--arrow-size) + 3px);

      &::after {
        border-bottom-color: $oc-black;
        bottom: 100%;
      }
    }
  }

  .Tooltip:hover .Tooltip__label {
    visibility: visible;
  }

  .Tooltip__label:hover {
    visibility: visible;
  }
}