Extreme Contrast Text Shadow

.contrast-text {
  font-size: 72px;
  font-weight: 900;
  text-transform: uppercase;
  color: #ffffff;
  text-align: center;
  letter-spacing: 4px;
  text-shadow: 
    0 0 5px #000000,
    0 0 10px #000000,
    0 0 15px #000000,
    0 0 20px #ff0000,
    0 0 30px #ff0000,
    0 0 40px #ff0000,
    0 0 50px #ff0000,
    0 0 75px #ff0000;
  animation: text-pulse 2s infinite ease-in-out;
}
@keyframes text-pulse {
  0%, 100% { text-shadow: 0 0 5px #000, 0 0 10px #000, 0 0 15px #000, 0 0 20px #ff0000, 0 0 30px #ff0000, 0 0 40px #ff0000, 0 0 50px #ff0000, 0 0 75px #ff0000; }
  50% { text-shadow: 0 0 5px #000, 0 0 10px #000, 0 0 15px #000, 0 0 20px #ff4500, 0 0 30px #ff4500, 0 0 40px #ff4500, 0 0 50px #ff4500, 0 0 85px #ff4500; }
}