body {
  font-family: 'Courier New', monospace;
  margin: 0;
  padding: 20px;
  background-color: #1a1a1a;
  color: #00ff00;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

h1 {
  color: #00ff00;
}

textarea {
  width: 100%;
  height: 400px;
  background-color: #000;
  color: #00ff00;
  border: 2px solid #00ff00;
  padding: 10px;
  font-family: 'Courier New', monospace;
  font-size: 16px;
  resize: none;
  margin: 20px 0;
}

.popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #000;
  color: #ff0000;
  padding: 20px;
  border: 2px solid #ff0000;
  font-size: 24px;
  text-align: center;
  box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
  transition: opacity 0.5s;
}

.popup.hidden {
  opacity: 0;
  pointer-events: none;
}

.settings {
  background-color: #000;
  padding: 10px;
  border: 2px solid #00ff00;
  margin-top: 10px;
}

.settings.hidden {
  display: none;
}

button, select {
  padding: 8px 16px;
  background-color: #00ff00;
  color: #000;
  border: none;
  font-family: 'Courier New', monospace;
  cursor: pointer;
  margin: 5px;
}

button:hover, select:hover {
  background-color: #00cc00;
}

@media (max-width: 600px) {
  textarea {
    height: 300px;
  }

  .popup {
    font-size: 18px;
    padding: 15px;
  }
}