html, body {
  height: 100%;
  margin: 0;
  background-color: #000;
  color: #00FF00;
  font-family: 'Courier New', Courier, monospace;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

h1 {
  font-size: 4em;
  animation: flicker 2s infinite alternate;
  text-shadow: 0 0 10px #0f0, 0 0 20px #0f0, 0 0 40px #0f0;
  margin-bottom: 0;
}

p {
  font-size: 1.5em;
  opacity: 0.7;
}

@keyframes flicker {
  0% { opacity: 1; }
  100% { opacity: 0.3; }
}

@media print {
  body {
    background: white;
    color: black;
    text-shadow: none;
  }
  h1 {
    font-size: 3em;
    animation: none;
    text-align: center;
  }
  p {
    text-align: center;
    font-size: 1em;
  }
}