body {
  margin: 0;
  padding: 0;
  background-color: #000;
  color: #fff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 100vh;
}

.flashing {
  font-size: 2.5rem;
  font-weight: 900;
  color: red;
  text-transform: uppercase;
  animation: flash 1s infinite alternate;
}

.flashing + .flashing {
  margin-top: 0.5rem;
}

@keyframes flash {
  0% {
    opacity: 1;
    text-shadow: 0 0 10px red, 0 0 20px red;
  }
  100% {
    opacity: 0.2;
    text-shadow: none;
  }
}

.message {
  margin-top: 2rem;
  font-size: 1.4rem;
  font-weight: 800;
}

.ps {
  margin-top: 1rem;
  font-size: 1rem;
  opacity: 0.85;
}

@media (max-width: 480px) {
  .flashing {
    font-size: 2rem;
  }
  .message {
    font-size: 1.2rem;
  }
  .ps {
    font-size: 0.95rem;
  }
}