#teacher-chat-box{border:1px solid #ccc;padding:10px;border-radius:8px;max-width:500px;margin:auto;background:#fafafa;}
#teacher-chat-messages{height:300px;overflow-y:auto;border:1px solid #ddd;padding:5px;margin-bottom:10px;background:white;}
#teacher-chat-form textarea{width:100%;height:50px;margin-bottom:5px;}
#teacher-chat-form input[type=file]{margin-bottom:5px;}
.chat-message{padding:5px;border-bottom:1px solid #eee;}