body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 0;
}

#chat-container {
  width: 80%;
  max-width: 800px;
  margin: auto;
  padding-top: 30px;
}

#chat-box {
  background: white;
  padding: 10px;
  height: 400px;
  overflow-y: scroll;
  border: 1px solid #ccc;
  margin-bottom: 10px;
}

#user-input {
  width: 70%;
  padding: 10px;
}

button {
  padding: 10px;
  margin-left: 5px;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: white;
  padding: 20px;
  width: 60%;
  border-radius: 8px;
}