body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f2f2f2;
  text-align: center;
}

header {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #004089;
  color: white;
  padding: 10px;
}

#avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin-right: 10px;
}

#chat-area {
  width: 80%;
  margin: 10px auto;
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid #ccc;
  padding: 10px;
  background: white;
  border-radius: 8px;
}

.submit-area {
  margin: 20px auto;
  width: 80%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

textarea {
  width: 100%;
  border-radius: 4px;
  padding: 8px;
  font-size: 16px;
}

button {
  margin-top: 10px;
  padding: 10px 20px;
  background-color: #004089;
  color: white;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}

.box {
  margin: 10px auto;
  width: 90%;
  padding: 10px;
  background: #e1f0ff;
  border-radius: 6px;
  text-align: left;
}

.answer {
  background-color: #c4f7c1;
}