#pdf-chat-box {
  max-width: 600px;
  margin: 20px auto;
  padding: 15px;
  border: 1px solid #ddd;
  background: #f9f9f9;
  border-radius: 8px;
}
#chat-history {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 10px;
}
#chat-history div {
  padding: 5px;
  margin-bottom: 5px;
}
#chat-history .user {
  text-align: right;
  color: blue;
}
#chat-history .bot {
  text-align: left;
  color: green;
}
#chat-input {
  width: 75%;
  padding: 8px;
}
#chat-submit {
  padding: 8px 12px;
}