body {
  background-color: #111;
  color: #eee;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0;
  text-align: center;
}
h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}
p {
  color: #888;
  margin-top: 0;
}
.cursor {
  display: inline-block;
  width: 10px;
  height: 1.5rem;
  background: #00ff00;
  animation: blink 1s infinite;
  vertical-align: middle;
}
@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}