html, body {
  height: 100%;
  margin: 0;
}

body {
  text-align: center;
  font-family: monospace;
   //color: #fff;
  //background-color: #000;
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
}

.subtitle {
  animation: pulse 12s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 1; }
}