body {
  background: #0f0f0f;
  color: white;
  font-family: Arial, sans-serif;
  margin: 0;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 32px 20px;
}

.subtitle {
  color: #b8b8b8;
}

#chat div {
  background: #1e1e1e;
  padding: 10px;
  margin: 10px 0;
  border-radius: 10px;
}

button {
  background: green;
  color: white;
  border: none;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: 8px;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.composer {
  display: flex;
  gap: 12px;
}

#msg {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #333;
  background: #151515;
  color: white;
}

.error {
  border: 1px solid #7a2222;
  color: #ffb3b3;
}