* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: #0a0a12;
  color: #00ffcc;
  font-family: 'Courier New', monospace;
  overflow: hidden;
  height: 100vh;
}
.screen { display: none; position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.screen.active { display: flex; }
.panel {
  background: rgba(10,20,30,0.9);
  border: 2px solid #00ccff;
  border-radius: 12px;
  padding: 30px;
  width: 750px;
  max-height: 90vh;
  overflow-y: auto;
}
.panel h2 { margin-bottom: 20px; color: #00ffcc; text-align: center; font-size: 24px; }