.glow-text {
   /* Lueur de base */
  text-shadow:
    0 0 15px #FF6666,
    0 0 20px #FF6666,
    0 0 40px #FF6666;

  /* Animation douce */
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    text-shadow:
      0 0 15px #FF6666,
      0 0 20px #FF6666,
      0 0 40px #FF6666;
  }
  to {
    text-shadow:
      0 0 30px #ffffff,
      0 0 40px #ffffff,
      0 0 60px #ffffff;
  }
}