#ai-chat-messages {    height: 400px;    overflow-y: auto;    padding: 15px;    background: #f8f9fa;    border-bottom: 1px solid #ddd;}.user-message {    text-align: right;    margin: 10px 0;}.user-message .message-content {    display: inline-block;    background: #007bff;    color: white;    padding: 10px 15px;    border-radius: 18px 18px 4px 18px;    max-width: 80%;}.ai-message {    text-align: left;    margin: 10px 0;}.ai-message .message-content {    display: inline-block;    background: #e9ecef;    color: #333;    padding: 10px 15px;    border-radius: 18px 18px 18px 4px;    max-width: 80%;}