Added a class to the tooltip so it can be styled

[ftm]

As suggested by @JorgeDAM, this adds the class atom-clock-tooltip to the tooltip so the text can be customised as seen below:

.atom-clock-tooltip > .tooltip-inner {
  color: red;
  font-family: "Comic Sans MS";
  font-size: 2rem;
}

[b3by]

Thank you! This actually leaves things quite tidy, and still gives the chance to edit the tooltip. I'll merge and update ASAP.