/* your curiosity does nothing yet. be vigilant. */

body {
  background-color: black;
  color: #fff;
  font-family: Arial;
  font-size: 22px;
  text-align: center;
}

glow {
  -webkit-animation: glow 1s ease-in-out infinite alternate;
  -moz-animation: glow 1s ease-in-out infinite alternate;
  animation: glow 1s ease-in-out infinite alternate;
}

hint {
  background-color: black;
  color: #fff;
}

@-webkit-keyframes glow {
  from {
    text-shadow: 0 0 10px #fff, 0 0 20px #fff;
  }
  to {
    text-shadow: 0 0 20px #fff;
  }
}