@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@600&display=swap');

.planet-label {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'Open Sans', sans-serif;
  color: white;
  background: black;
  padding: 0.3em;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 6;
}

.planet:hover .planet-label {
  opacity: 1;
}

.planet-label[data-position="above"] { bottom: 110%; }
.planet-label[data-position="below"] { top: 110%; }