/* =========================================================
   AI 客服聊天室
   iOS Liquid Glass / 深色網站版本
   ========================================================= */

:root {
  --chat-blue: #0a84ff;
  --chat-blue-dark: #006edc;

  --chat-glass-bg: rgba(20, 20, 24, 0.72);
  --chat-glass-light: rgba(255, 255, 255, 0.1);

  --chat-border: rgba(255, 255, 255, 0.18);
  --chat-border-soft: rgba(255, 255, 255, 0.09);

  --chat-text: rgba(255, 255, 255, 0.95);
  --chat-text-light: rgba(255, 255, 255, 0.6);
}

/* =========================================================
   右下角 AI 客服開啟按鈕
   ========================================================= */

#chatToggleBtn {
  position: fixed;

  right: 24px;
  bottom: 24px;

  width: 58px;
  height: 58px;

  padding: 0;

  border-radius: 50%;

  border: 1px solid rgba(255, 255, 255, 0.28);

  background:
    linear-gradient(
      145deg,
      rgba(255, 255, 255, 0.2),
      rgba(255, 255, 255, 0.05)
    ),
    rgba(10, 132, 255, 0.78);

  /* iOS 毛玻璃 */
  -webkit-backdrop-filter: blur(20px) saturate(180%);

  backdrop-filter: blur(20px) saturate(180%);

  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.35),
    0 5px 20px rgba(10, 132, 255, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);

  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  /*
       很重要
       一定要比 chat-container 高
    */
  z-index: 10001;

  opacity: 1;
  visibility: visible;

  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    background 0.25s ease;
}

#chatToggleBtn:hover {
  transform: translateY(-3px) scale(1.06);

  background:
    linear-gradient(
      145deg,
      rgba(255, 255, 255, 0.28),
      rgba(255, 255, 255, 0.08)
    ),
    rgba(10, 132, 255, 0.9);

  box-shadow:
    0 14px 36px rgba(0, 0, 0, 0.42),
    0 8px 26px rgba(10, 132, 255, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

#chatToggleBtn:active {
  transform: scale(0.94);
}

#chatToggleBtn svg {
  width: 27px;
  height: 27px;

  fill: #ffffff;

  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.22));

  pointer-events: none;
}

/* =========================================================
   聊天視窗主體
   ========================================================= */

.chat-container {
  position: fixed;

  right: 24px;
  bottom: 96px;

  width: calc(100% - 48px);
  max-width: 500px;

  height: 600px;
  max-height: calc(100vh - 140px);

  display: flex;
  flex-direction: column;

  overflow: hidden;

  /*
       iOS 大圓角
    */
  border-radius: 28px;

  /*
       Liquid Glass
    */
  background:
    linear-gradient(
      145deg,
      rgba(255, 255, 255, 0.13) 0%,
      rgba(255, 255, 255, 0.04) 35%,
      rgba(10, 10, 18, 0.18) 100%
    ),
    var(--chat-glass-bg);

  border: 1px solid var(--chat-border);

  -webkit-backdrop-filter: blur(30px) saturate(180%);

  backdrop-filter: blur(30px) saturate(180%);

  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.5),
    0 8px 30px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.24);

  /*
       比按鈕低一層
    */
  z-index: 10000;

  /* -------------------------
       預設關閉
       ------------------------- */

  opacity: 0;

  visibility: hidden;

  pointer-events: none;

  transform: translateY(20px) scale(0.96);

  transform-origin: bottom right;

  transition:
    opacity 0.28s ease,
    transform 0.28s ease,
    visibility 0.28s ease;
}

/* =========================================================
   聊天視窗開啟
   ========================================================= */

.chat-container.open {
  opacity: 1;

  visibility: visible;

  pointer-events: auto;

  transform: translateY(0) scale(1);
}

/* =========================================================
   聊天室 Header
   ========================================================= */

.chat-header {
  position: relative;

  min-height: 62px;

  padding: 0 100px 0 22px;

  box-sizing: border-box;

  display: flex;
  align-items: center;

  color: rgba(255, 255, 255, 0.96);

  font-size: 17px;
  font-weight: 600;

  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Microsoft JhengHei",
    Arial, sans-serif;

  letter-spacing: 0.3px;

  /* background: rgba(255, 255, 255, 0.055); */
  background: linear-gradient(45deg, #602c6e, transparent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);

  -webkit-backdrop-filter: blur(20px);

  backdrop-filter: blur(20px);
}

/* =========================================================
   Header 清除按鈕
   ========================================================= */

.chat-header-clear {
  position: absolute;

  right: 56px;
  top: 50%;

  transform: translateY(-50%);

  width: 34px;
  height: 34px;

  padding: 8px;

  display: flex;
  align-items: center;
  justify-content: center;

  border-radius: 50%;

  border: 1px solid rgba(255, 255, 255, 0.12);

  background: rgba(255, 255, 255, 0.075);

  color: rgba(255, 255, 255, 0.8);

  cursor: pointer;

  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.chat-header-clear:hover {
  background: rgba(255, 255, 255, 0.16);
  top: 14px !important;
  transform: translateY(-50%) scale(1.08);
}

.chat-header-clear svg {
  width: 17px;
  height: 17px;

  stroke: currentColor;
}

/* =========================================================
   Header 關閉按鈕
   ========================================================= */

.chat-header .chat-header-close {
  position: absolute;

  right: 14px;
  top: 50%;

  transform: translateY(-50%);

  width: 34px;
  height: 34px;

  padding: 8px;

  display: flex;
  align-items: center;
  justify-content: center;

  border-radius: 50%;

  border: 1px solid rgba(255, 255, 255, 0.12);

  background: rgba(255, 255, 255, 0.075);

  cursor: pointer;

  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.chat-header .chat-header-close:hover {
  background: rgba(255, 255, 255, 0.16);

  transform: translateY(-50%) scale(1.06);
}

.chat-header .chat-header-close svg {
  width: 18px;
  height: 18px;

  fill: rgba(255, 255, 255, 0.9);
}

/* =========================================================
   訊息顯示區
   ========================================================= */

.chat-messages {
  flex: 1;

  padding: 20px 16px;

  box-sizing: border-box;

  overflow-y: auto;

  background: transparent;

  scroll-behavior: smooth;

  scrollbar-width: thin;

  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.chat-messages::-webkit-scrollbar {
  width: 5px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);

  border-radius: 10px;
}

/* =========================================================
   每則訊息
   ========================================================= */

.message-bubble {
  margin-bottom: 14px;

  display: flex;
  flex-direction: column;
}

.message-text {
  max-width: 78%;

  padding: 11px 15px;

  border-radius: 20px;

  font-size: 1.05em;

  line-height: 1.55;

  word-wrap: break-word;
  word-break: break-word;

  box-sizing: border-box;

  -webkit-backdrop-filter: blur(15px);

  backdrop-filter: blur(15px);
}

.ai-chat-link {
  color: #b2b7ef !important;
}
.ai-chat-link:hover {
  color: #e2df6a !important;
}

/* =========================================================
   使用者訊息
   ========================================================= */

.message-user {
  align-items: flex-end;
}

.message-user .message-text {
  color: #ffffff;

  background: linear-gradient(
    145deg,
    rgba(45, 155, 255, 0.96),
    rgba(0, 110, 230, 0.88)
  );

  border: 1px solid rgba(255, 255, 255, 0.18);

  border-bottom-right-radius: 6px;

  box-shadow:
    0 7px 18px rgba(0, 110, 255, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

/* =========================================================
   AI 訊息
   ========================================================= */

.message-ai {
  align-items: flex-start;
}

.message-ai .message-text {
  color: rgba(255, 255, 255, 1);

  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.14),
    rgba(255, 255, 255, 0.07)
  );

  border: 1px solid rgba(255, 255, 255, 0.11);

  border-bottom-left-radius: 6px;

  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* =========================================================
   知識庫來源
   ========================================================= */

.source-info {
  margin-top: 6px;

  padding-left: 7px;

  font-size: 0.8em;

  color: rgba(255, 255, 255, 0.45);
}

/* =========================================================
   引導問題區
   ========================================================= */

.guide-questions-container {
  padding: 10px 15px;

  box-sizing: border-box;

  display: flex;
  flex-wrap: wrap;

  gap: 8px;

  background: rgba(255, 255, 255, 0.025);

  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.guide-question-btn {
  padding: 7px 14px;

  border-radius: 18px;

  border: 1px solid rgba(255, 255, 255, 0.14);

  background: rgba(255, 255, 255, 0.075);

  color: rgba(255, 255, 255, 0.82);

  font-size: 0.88em;

  cursor: pointer;

  white-space: nowrap;

  outline: none;

  -webkit-backdrop-filter: blur(12px);

  backdrop-filter: blur(12px);

  transition: all 0.22s ease;
}

.guide-question-btn:hover {
  color: #ffffff;

  background: rgba(10, 132, 255, 0.75);

  border-color: rgba(100, 180, 255, 0.6);

  transform: translateY(-1px);

  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.18);
}

.guide-question-btn:active {
  transform: translateY(0) scale(0.98);
}

/* =========================================================
   底部輸入區
   ========================================================= */

.chat-input-area {
  padding: 12px;

  box-sizing: border-box;

  display: flex;
  align-items: center;

  border-top: 1px solid rgba(255, 255, 255, 0.08);

  background: rgba(10, 10, 15, 0.25);

  color: #ffffff;

  -webkit-backdrop-filter: blur(22px);

  backdrop-filter: blur(22px);
}

/* =========================================================
   輸入框
   ========================================================= */

.chat-input {
  flex: 1;

  min-width: 0;

  height: 46px;

  box-sizing: border-box;

  padding: 0 17px;

  border-radius: 23px;

  border: 1px solid rgba(255, 255, 255, 0.15);

  background: rgba(255, 255, 255, 0.075);

  color: #ffffff;

  font-size: 0.95em;

  outline: none;

  -webkit-backdrop-filter: blur(15px);

  backdrop-filter: blur(15px);

  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.chat-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.chat-input:focus {
  background: rgba(255, 255, 255, 0.11);

  border-color: rgba(10, 132, 255, 0.75);

  box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.12);
}

/* =========================================================
   發送按鈕
   ========================================================= */

.btn-send {
  height: 46px;

  margin-left: 8px;

  padding: 0 20px;

  border: none;

  border-radius: 23px;

  background: linear-gradient(145deg, #2997ff, #0071e3);

  color: #ffffff;

  font-size: 0.95em;
  font-weight: 600;

  cursor: pointer;

  box-shadow:
    0 5px 15px rgba(0, 113, 227, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);

  transition:
    transform 0.2s ease,
    filter 0.2s ease;
}

.btn-send:hover {
  filter: brightness(1.1);

  transform: scale(1.03);
}

.btn-send:active {
  transform: scale(0.95);
}

.btn-send:disabled {
  opacity: 0.45;

  cursor: not-allowed;

  filter: grayscale(0.4);
}

/* =========================================================
   手機版
   ========================================================= */

@media (max-width: 540px) {
  .chat-container {
    right: 10px;
    bottom: 85px;

    width: calc(100% - 20px);

    max-width: none;

    height: min(650px, calc(100dvh - 105px));

    max-height: calc(100dvh - 105px);

    border-radius: 26px;
  }

  #chatToggleBtn {
    right: 16px;
    bottom: 16px;

    width: 55px;
    height: 55px;
  }

  .chat-input-area {
    /*
           我不建議手機變直向排列，
           iPhone Messages 還是橫向比較自然
        */
    flex-direction: row;
  }

  .chat-input {
    height: 44px;
  }

  .btn-send {
    height: 44px;

    margin-left: 7px;

    padding: 0 16px;
  }

  .message-text {
    max-width: 84%;

    font-size: 1em;
  }
}

/* =========================================================
   瀏覽器不支援 backdrop-filter 時
   ========================================================= */

@supports not ((backdrop-filter: blur(20px))) {
  .chat-container {
    background: rgba(22, 22, 28, 0.97);
  }

  #chatToggleBtn {
    background: #0a84ff;
  }
}