.btn {
  background-color: linen;
  border: none;
  color: indianred;
  padding: 12px 16px;
	font-weight: 575;
  font-size: 25px;
	position: fixed;
  cursor: pointer;
}
 Darker background on mouse-over */
.btn:hover {
  background-color: burlywood;
  color: black;
}

.glow {
  font-size: .75em;
  color: darkred;
  text-align: center;
  animation: glow 1.75s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    text-shadow: 0 0 1px #fff, 0 0 2px #fff, 0 0 3px #edc4c4, 0 0 4px #edc4c4, 0 0 5px #edc4c4, 0 0 6px #edc4c4, 0 0 7px #edc4c4;
  }
  to {
    text-shadow: 0 0 20px #fff, 0 0 30px #f9ebeb, 0 0 40px #f9ebeb, 0 0 50px #f9ebeb, 0 0 60px #f9ebeb, 0 0 70px #f9ebeb, 0 0 80px #f9ebeb;
  }
}