body { font-family: sans-serif; background: #f0f2f5; display: flex; justify-content: center; padding: 20px; margin: 0; }
.chat-container { width: 100%; max-width: 700px; background: white; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); overflow: hidden; display: flex; flex-direction: column; height: 90vh; }
.controls { display: flex; gap: 10px; padding: 10px; background: #f8f9fa; border-bottom: 1px solid #ddd; }
.controls select { padding: 8px; border-radius: 5px; border: 1px solid #ccc; flex: 1; }
.mode-switch { padding: 10px; text-align: center; background: #e9ecef; border-bottom: 1px solid #ddd; }
.mode-switch label { margin: 0 15px; cursor: pointer; font-weight: bold; }
.chat-box { flex: 1; overflow-y: auto; padding: 15px; display: flex; flex-direction: column; }
.message { margin-bottom: 10px; padding: 10px 15px; border-radius: 15px; max-width: 80%; word-wrap: break-word; }
.message.user { background: #007bff; color: white; align-self: flex-end; border-bottom-right-radius: 0; }
.message.bot { background: #e9ecef; color: #333; align-self: flex-start; border-bottom-left-radius: 0; }
.message img { max-width: 100%; border-radius: 10px; margin-top: 10px; }
.input-area { display: flex; padding: 10px; border-top: 1px solid #ddd; background: white; }
.input-area input { flex: 1; padding: 12px; border: 1px solid #ddd; border-radius: 5px; font-size: 16px; }
.input-area button { padding: 12px 20px; margin-left: 10px; background: #007bff; color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 16px; font-weight: bold; }
.input-area button:hover { background: #0056b3; }