* {
  margin: 0;
  padding: 0;
}

body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}

h1 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(3rem, 12vw, 10rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  background: linear-gradient(
    90deg,
    #555 0%,
    #555 40%,
    #fff 50%,
    #555 60%,
    #555 100%
  );
  background-size: 200% auto;
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 200% center; }
  100% { background-position: -200% center; }
}

@media (prefers-reduced-motion: reduce) {
  h1 {
    animation: none;
    background: none;
    color: #fff;
  }
}