.balloon {
  font-family: "Arial", "Helvetica", "Verdana", "Geneva",
       "SunSans-Regular", sans-serif;
  border-width: thin;
  border-style: inset;
  border-color: blue;
  position: absolute;
  layer-background-color: yellow;
  background-color: yellow;
  padding: 0;
  visibility: hidden;
}

.istip {
  text-decoration: none;
}