:root {
    --send-bg: #0B93F6;
    --send-color: white;
    --receive-bg: #E5E5EA;
    --receive-text: black;
    --page-background: white;
}
  
body {
    font-family: "Helvetica Neue", Helvetica, sans-serif;
    font-size: 20px;
    font-weight: normal;
    max-width: 450px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    background-color: var(--page-background);
    height: 100vh; /* 뷰포트 높이를 100%로 설정 */
    padding: 0; /* 패딩 제거 */
}
  
#chat-container {
    width: 100%;
    max-width: 450px;
    background: var(--page-background);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%; /* 컨테이너 높이를 100%로 설정 */
}
  
#chat-box {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch; /* iOS 스크롤 개선 */
}
  
  p {
      max-width: 255px;
      word-wrap: break-word;
      margin-bottom: 12px;
      line-height: 24px;
      position: relative;
      padding: 10px 20px;
      border-radius: 25px;
  }
  
  p:before, p:after {
      content: "";
      position: absolute;
      bottom: 0;
      height: 25px;
  }
  
  .send {
      color: var(--send-color);
      background: var(--send-bg);
      align-self: flex-end;
      margin-left: auto;
  }
  
  .send:before {
      right: -7px;
      width: 20px;
      background-color: var(--send-bg);
      border-bottom-left-radius: 16px 14px;
  }
  
  .send:after {
      right: -26px;
      width: 26px;
      background-color: var(--page-background);
      border-bottom-left-radius: 10px;
  }
  
  .receive {
      background: var(--receive-bg);
      color: black;
      align-self: flex-start;
      margin-right: auto;
  }
  
  .receive:before {
      left: -7px;
      width: 20px;
      background-color: var(--receive-bg);
      border-bottom-right-radius: 16px 14px;
  }
  
  .receive:after {
      left: -26px;
      width: 26px;
      background-color: var(--page-background);
      border-bottom-right-radius: 10px;
  }
  
  #input-container {
      display: flex;
      border-top: 1px solid #ddd;
  }
  
  #user-input {
      flex: 1;
      padding: 10px;
      border: none;
      outline: none;
  }
  
  #send-button {
      padding: 10px 20px;
      background: #ffcc80;
      color: white;
      border: none;
      cursor: pointer;
  }
  
  #send-button:hover {
      background: #ffa726;
  }

  #loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border: 10px solid #ccc;
    border-radius: 50%;
    border-top: 10px solid #fff;
    animation: spin 1s linear infinite;
    display: none; /* 기본적으로 숨겨짐 */
  }
  
  @keyframes spin {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
  }
  
  /* 로딩 애니매이션 */
  @keyframes typing {
    0% { opacity: 0.2; }
    20% { opacity: 1; }
    100% { opacity: 0.2; }
}

.typing-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 20px;
}

.typing-indicator div {
    background-color: #ccc;
    border-radius: 50%;
    width: 8px;
    height: 8px;
    margin: 0 2px;
    animation: typing 1.5s infinite ease-in-out;
}

.typing-indicator div:nth-child(1) {
    animation-delay: 0s;
}

.typing-indicator div:nth-child(2) {
    animation-delay: 0.3s;
}

.typing-indicator div:nth-child(3) {
    animation-delay: 0.6s;
}

#user-input {
    flex: 1;
    padding: 10px;
    border: none;
    outline: none;
    resize: none; /* 사용자가 수동으로 크기 조절하는 것 방지 */
    min-height: 24px; /* 최소 높이 설정 */
    max-height: 150px; /* 최대 높이 설정 */
    font-family: inherit; /* 폰트 통일 */
    font-size: inherit; /* 폰트 크기 통일 */
    line-height: 1.4; /* 줄 간격 설정 */
    overflow-y: auto; /* 세로 스크롤 자동 */
    margin: 5px; /* 여백 추가 */
}

#input-container {
    display: flex;
    align-items: flex-end; /* 전송 버튼을 아래쪽으로 정렬 */
    border-top: 1px solid #ddd;
    padding: 5px;
    background: white;
}

/* 로딩애니매이션 끝 */