/* =========================================================
   Dialogflow CX Messenger
   視覺主題、響應式尺寸與空白狀態提示卡
   ========================================================= */

df-messenger {
  z-index: 9999;
  position: fixed;
  bottom: max(14px, env(safe-area-inset-bottom));
  right: max(14px, env(safe-area-inset-right));

  /* 整體字體 */
  --df-messenger-font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  --df-messenger-font-size: 16px;
  --df-messenger-font-color: var(--ink);

  /* 主色 */
  --df-messenger-primary-color: var(--teal);
  --df-messenger-focus-color: var(--orange);
  --df-messenger-focus-color-contrast: #ffffff;

  /* 整個聊天視窗 */
  --df-messenger-chat-background: #f8f5ee;
  --df-messenger-chat-border: 1px solid rgba(17, 73, 79, 0.16);
  --df-messenger-chat-border-radius: 22px;
  --df-messenger-chat-window-width: min(430px, calc(100vw - 32px));
  --df-messenger-chat-window-height: min(680px, calc(100dvh - 124px));
  --df-messenger-chat-window-offset: 18px;
  --df-messenger-chat-window-box-shadow: 0 18px 50px rgba(13, 57, 63, 0.24);
  --df-messenger-chat-padding: 16px;

  /* 訊息清單 */
  --df-messenger-messagelist-border: none;
  --df-messenger-message-border: none;
  --df-messenger-message-font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  --df-messenger-message-font-size: 18px;
  --df-messenger-message-font-weight: 400;
  --df-messenger-message-spacing: 12px;
  --df-messenger-message-border-radius: 15px;

  /* 機器人訊息 */
  --df-messenger-message-bot-background: #fffefb;
  --df-messenger-message-bot-font-color: var(--ink);
  --df-messenger-message-bot-font-weight: 400;
  --df-messenger-message-bot-border: 1px solid rgba(17, 73, 79, 0.1);

  /* 使用者訊息 */
  --df-messenger-message-user-background: var(--blue);
  --df-messenger-message-user-font-color: var(--ink);
  --df-messenger-message-user-font-weight: 500;
  --df-messenger-message-user-border: 1px solid rgba(12, 104, 109, 0.1);

  /* 標題列 */
  --df-messenger-titlebar-background: var(--teal-dark);
  --df-messenger-titlebar-font-color: #ffffff;
  --df-messenger-titlebar-padding: 14px 16px;
  --df-messenger-titlebar-border: none;
  --df-messenger-titlebar-border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  --df-messenger-titlebar-title-align: start;
  --df-messenger-titlebar-title-font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  --df-messenger-titlebar-title-font-size: 18px;
  --df-messenger-titlebar-title-font-weight: 900;
  --df-messenger-titlebar-subtitle-font-size: 16px;
  --df-messenger-titlebar-subtitle-font-weight: 500;
  --df-messenger-titlebar-subtitle-font-color: rgba(255, 255, 255, 0.82);

  /* 輸入區 */
  --df-messenger-input-background: #ffffff;
  --df-messenger-input-padding: 14px;
  --df-messenger-input-inner-padding: 14px 56px 14px 16px;

  /* 送出圖示 */
  --df-messenger-send-icon-color: var(--teal);
  --df-messenger-send-icon-color-hover: var(--teal-dark);
  --df-messenger-send-icon-color-active: var(--teal-dark);
  --df-messenger-send-icon-offset-x: 0;
  --df-messenger-send-icon-offset-y: 0;

  /* 右下角按鈕 */
  --df-messenger-chat-bubble-background: var(--teal);
  --df-messenger-chat-bubble-size: 62px;
  --df-messenger-chat-bubble-icon-size: 30px;
  --df-messenger-chat-bubble-icon-color: #ffffff;
  --df-messenger-chat-bubble-border-radius: 50%;
  --df-messenger-chat-bubble-border: 1px solid rgba(255, 255, 255, 0.55);

  /* 滾到最底按鈕 */
  --df-messenger-chat-scroll-button-enabled-display: none;
  --df-messenger-chat-scroll-button-align: center;
  --df-messenger-chat-scroll-button-container-padding: 8px;
  --df-messenger-chat-scroll-button-font-size: 16px;
  --df-messenger-chat-scroll-button-font-color: #ffffff;
  --df-messenger-chat-scroll-button-background: var(--teal);
  --df-messenger-chat-scroll-button-border-radius: 999px;
}

df-messenger:hover {
  --df-messenger-chat-bubble-background: var(--teal-dark);
}

/*
   空白狀態提示卡
   這是前端的視覺導覽，不是 Dialogflow CX 的第一則訊息。
   由 messenger-ui.js 在聊天視窗開啟且尚未送出查詢時顯示。
*/
.messenger-empty-state {
  position: fixed;
  z-index: 10000;
  right: calc(max(14px, env(safe-area-inset-right)) + 12px);
  bottom: calc(max(14px, env(safe-area-inset-bottom)) + 62px + 18px + 106px);
  width: min(366px, calc(100vw - 48px));
  padding: 18px 18px 16px;
  border: 1px solid rgba(12, 104, 109, 0.18);
  border-radius: 20px;
  background:
    radial-gradient(circle at 92% 0%, rgba(223, 124, 70, 0.14), transparent 36%),
    linear-gradient(145deg, rgba(255, 255, 251, 0.98), rgba(239, 247, 243, 0.97));
  color: var(--ink);
  box-shadow: 0 16px 34px rgba(13, 57, 63, 0.2);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(0.98);
  transform-origin: right bottom;
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.messenger-empty-state.is-visible {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.messenger-empty-state[hidden] {
  display: none;
}

.messenger-empty-state__header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.messenger-empty-state__icon {
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--teal);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(12, 104, 109, 0.2);
}

.messenger-empty-state__icon svg {
  width: 23px;
  height: 23px;
}

.messenger-empty-state__eyebrow {
  display: block;
  color: var(--teal);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.messenger-empty-state h2 {
  margin: 2px 0 4px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.35;
}

.messenger-empty-state__description {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.55;
}

.messenger-topic-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 16px 0 13px;
}

.messenger-topic {
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid rgba(12, 104, 109, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--teal-dark);
  cursor: pointer;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.35;
  text-align: left;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.messenger-topic:hover {
  border-color: var(--teal);
  background: #ffffff;
  transform: translateY(-1px);
}

.messenger-topic:focus-visible {
  outline: 3px solid rgba(223, 124, 70, 0.42);
  outline-offset: 2px;
}

.messenger-empty-state__notice {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  margin: 0;
  padding-top: 11px;
  border-top: 1px solid rgba(17, 73, 79, 0.12);
  color: #557078;
  font-size: 16px;
  line-height: 1.55;
}

.messenger-empty-state__notice svg {
  flex: none;
  width: 15px;
  height: 15px;
  margin-top: 1px;
  color: var(--orange);
}

@media (max-width: 840px) {
  df-messenger {
    --df-messenger-chat-window-width: 390px;
    --df-messenger-chat-window-height: 620px;
  }
}

@media (max-height: 800px) {
  df-messenger {
    --df-messenger-chat-window-height: 500px;
  }
}

@media (max-height: 680px) {
  df-messenger {
    --df-messenger-chat-window-height: 440px;
  }
}

@media (max-width: 560px) {
  df-messenger {
    --df-messenger-chat-bubble-size: 56px;
    --df-messenger-chat-bubble-icon-size: 28px;
    --df-messenger-chat-window-width: calc(100vw - 28px);
    --df-messenger-chat-window-height: min(680px, calc(100dvh - 96px));
  }

  .messenger-empty-state {
    right: 28px;
    bottom: calc(max(14px, env(safe-area-inset-bottom)) + 56px + 18px + 92px);
    width: calc(100vw - 56px);
    padding: 16px;
    border-radius: 18px;
  }

  .messenger-empty-state__icon {
    flex-basis: 38px;
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }

  .messenger-empty-state h2 {
    font-size: 16px;
  }

  .messenger-topic-list {
    gap: 7px;
    margin-top: 13px;
  }

  .messenger-topic {
    padding: 8px;
    font-size: 16px;
  }
}

@media (max-width: 380px) {
  .messenger-empty-state {
    right: 22px;
    width: calc(100vw - 44px);
    padding: 14px;
  }

  .messenger-empty-state__header {
    gap: 9px;
  }

  .messenger-empty-state__description {
    font-size: 16px;
  }

  .messenger-topic-list {
    grid-template-columns: 1fr;
  }
}

@media print {
  df-messenger,
  .messenger-empty-state {
    display: none !important;
  }
}

.assistant-panel__topics h3{margin:14px 0 0;font-size: 16px;color:#103844;line-height:1.5}
.assistant-panel__topics .messenger-topic-list{margin:8px 0 0}
.assistant-panel__topics .messenger-topic{font-size: 16px;min-height:44px}
.assistant-panel__content{max-height:100%;overflow-y:auto}

df-messenger { --df-messenger-input-font-size: 18px; --df-messenger-message-line-height: 1.75; }

/* Original illustrated launcher; keep the close control visible when expanded. */
df-messenger { --df-messenger-chat-bubble-size:84px; --df-messenger-chat-bubble-icon-size:150px; --df-messenger-chat-bubble-background:transparent; --df-messenger-chat-bubble-border:none; }
df-messenger:hover { --df-messenger-chat-bubble-background:transparent; }
@media(max-width:560px) { df-messenger { --df-messenger-chat-bubble-size:72px; --df-messenger-chat-bubble-icon-size:132px; } }

df-messenger { --df-messenger-chat-bubble-icon-color:#ffffff; --df-messenger-chat-bubble-close-icon-transform-rotate:0deg; }

/* Short / zoomed viewports keep more space for the conversation and input. */
df-messenger[data-compact-chat] {
  --df-messenger-titlebar-padding: 8px 12px;
  --df-messenger-input-padding: 6px;
  --df-messenger-input-inner-padding: 8px 44px 8px 12px;
}