body {
  margin: 0;
  background: black;
  font-family: monospace;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
}

/* Center container */
.screen {
  text-align: center;
  width: 90%;
  max-width: 600px;
}

/* Flashing title */
.flash {
  color: red;
  font-size: 2rem;
  animation: flash 0.8s infinite;
}

/* Terminal box */
.terminal {
  margin-top: 20px;
  height: 150px;
  overflow: hidden;
  border: 1px solid #300;
  padding: 10px;
}

/* Scrolling lines */
.lines {
  color: red;
  font-size: 14px;
  line-height: 1.4;
  animation: scroll 8s linear infinite;
}

/* Flash effect */
@keyframes flash {
  0% { opacity: 1; text-shadow: 0 0 5px red; }
  50% { opacity: 0.2; }
  100% { opacity: 1; text-shadow: 0 0 5px red; }
}

/* Scroll upward */
@keyframes scroll {
  0% { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}