body {
  font-family: Arial;
  margin: 20px;
}

.flex {
  display: flex;
  gap: 20px;
}

.column {
  flex: 1;
  border: 1px solid gray;
  padding: 10px;
}

.chat {
  flex: 2;
  display: flex;
  flex-direction: column;
  border: 1px solid gray;
  padding: 10px;
}

#chat_box {
  flex: 1;
  border: 1px solid #ccc;
  margin-bottom: 10px;
  height: 300px;
  overflow-y: auto;
}