@keyframes bgGradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes glowText {
  0%, 100% {
    text-shadow:
      0 0 5px #0ff,
      0 0 10px #0ff,
      0 0 20px #0ff,
      0 0 40px #0ff;
    transform: translateX(0) rotate(0deg);
  }
  50% {
    text-shadow:
      0 0 20px #0ff,
      0 0 30px #0ff,
      0 0 40px #0ff,
      0 0 80px #0ff;
    transform: translateX(10px) rotate(3deg);
  }
}

body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(270deg, #0ff, #00f, #0ff, #00f);
  background-size: 400% 400%;
  animation: bgGradient 15s ease infinite;
  color: #0ff;
}

h1 {
  font-size: 5rem;
  font-weight: 900;
  animation: glowText 3s ease-in-out infinite;
  user-select: none;
}