body {
  background-color: #140904;
  color: #FFFFFF;
  font-family: 'Noto Sans KR', sans-serif;
  margin: 0;
  padding: 0;
}

.header {
  padding: 20px 0;
}

.header img {
  width: 100%;
  max-width: 1024px;
  height: auto;
}

.role-selection {
  padding: 20px 0;
}

.chat-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

.chatbox {
  display: flex;
  flex-direction: column;
  background-color: #1F1F1F;
  border-radius: 5px;
  overflow: hidden;
}

.messages {
  overflow-y: scroll;
  padding: 10px;
}

.input {
  display: flex;
  padding: 10px;
}

input {
  flex-grow: 1;
  padding: 10px;
  border: none;
  border-radius: 5px 0 0 5px;
}

button {
  padding: 10px;
  background-color: #4caf50;
  border: none;
  color: white;
  font-weight: bold;
  border-radius: 0 5px 5px 0;
  cursor: pointer;
}

.message {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.chatbox .message {
  background-color: #3A3A3A;
  color: #FFFFFF;
  border-radius: 8px;
  padding: 8px;
  margin: 4px;
  word-wrap: break-word;
}

.message.sent {
  justify-content: flex-end;
  background-color: #2565db;
}

.sent .profile-img {
  order: 2;
}

.received {
  justify-content: flex-start;
}

.profile-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  margin: 0 10px;
}

/* 반응형 디자인 추가 */
@media screen and (max-width: 768px) {
  .header {
    padding: 10px 0;
  }

  .role-selection {
    padding: 10px 0;
  }

  .chat-container {
    padding: 10px 0;
  }

  .messages {
    padding: 5px;
  }

  .input {
    padding: 5px;
  }

  input {
    padding: 5px;
  }

  button {
    padding: 5px;
  }

  .profile-img {
    width: 30px;
    height: 30px;
  }
  
}