body {
  margin: 0;
  background: #050816;
  color: #c9f9ff;
  font-family: Arial, sans-serif;
  line-height: 1.9;
}

.hero {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  color: #00f7ff;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

.reveal-text {
  --hidden-color: #050816;
  --visible-color: #c9f9ff;

  white-space: pre-wrap;
  color: var(--visible-color);
}

.reveal-char {
  color: var(--hidden-color);
  transition: color 120ms linear;
}

.reveal-char.visible {
  color: rgba(0,255,255,.45);
}

.reveal-char.complete {
  color: var(--visible-color);
}