body {
  font-family: "Segoe UI", Roboto, sans-serif;
  background-color: #f5f5f5;
  color: #333;
  margin: 0;
  padding: 2rem;
}

.container {
  max-width: 800px;
  margin: auto;
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.05);
}

.chat-bubble {
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.user {
  background-color: #e0f2ff;
  border-left: 4px solid #2196f3;
}

.assistant {
  background-color: #f0f0f0;
  border-left: 4px solid #999;
}