/* ============================================================
   FCU 宿舍網路報修 Chatbot 樣式表
   設計：深色系、毛玻璃、發光特效
   最後更新：2026-08-07（修正頂部計數器隱藏斷點至 640px）
   ============================================================ */

/* ── Google Fonts 預設已由 HTML 載入 ── */

/* ── CSS 設定變數 ── */
:root {
  /* 主色系 */
  --color-bg-primary:    #0a0e1a;
  --color-bg-secondary:  #0d1730;
  --color-bg-tertiary:   #111d3a;

  /* 毛玻璃 */
  --glass-bg:            rgba(255, 255, 255, 0.04);
  --glass-bg-hover:      rgba(255, 255, 255, 0.07);
  --glass-border:        rgba(255, 255, 255, 0.08);
  --glass-border-active: rgba(56, 189, 248, 0.35);
  --glass-blur:          12px;

  /* 強調色 */
  --color-accent-orange: #f97316;
  --color-accent-orange-light: #fb923c;
  --color-accent-blue:   #38bdf8;
  --color-accent-blue-dim: rgba(56, 189, 248, 0.15);

  /* 文字 */
  --color-text-primary:  #e2e8f0;
  --color-text-secondary:#94a3b8;
  --color-text-muted:    #64748b;

  /* 訊息泡泡 */
  --bubble-bot-bg:       rgba(56, 189, 248, 0.08);
  --bubble-bot-border:   rgba(56, 189, 248, 0.2);
  --bubble-user-from:    #f97316;
  --bubble-user-to:      #fb923c;

  /* 表單 */
  --input-bg:            rgba(255, 255, 255, 0.05);
  --input-border:        rgba(255, 255, 255, 0.1);
  --input-border-focus:  rgba(249, 115, 22, 0.6);
  --input-text:          #e2e8f0;

  /* 陰影 */
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.5);
  --glow-orange: 0 0 20px rgba(249, 115, 22, 0.3);
  --glow-blue:   0 0 20px rgba(56, 189, 248, 0.2);
  --glow-blue-strong: 0 0 28px rgba(56, 189, 248, 0.55);

  /* Teams 專屬紫色系（對齊 Teams 2025 icon 漸層） */
  --color-teams-purple:     #7B83EB;
  --color-teams-purple-light: #9EA5F1;
  --color-teams-purple-dim: rgba(123, 131, 235, 0.18);
  --glow-teams:             0 0 18px rgba(123, 131, 235, 0.45);
  --glow-teams-strong:      0 0 28px rgba(123, 131, 235, 0.7);

  /* 語意色（成功／危險） */
  --color-success:      #4ade80;
  --color-danger:       #ef4444;
  --color-danger-light: #f87171;

  /* 純白 / Bot 頭像漸層（v1.3.1：改用變數，移除 CSS 內的硬編碼色碼） */
  --color-white:        #fff;
  --avatar-bot-from:    #1e3a5f;
  --avatar-bot-to:      #0c2040;

  /* 尺寸 */
  --header-height: 68px;
  --footer-height: 76px;
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  /* 動畫 */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset 基礎設定 ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Noto Sans TC', 'Inter', system-ui, sans-serif;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(56, 189, 248, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(249, 115, 22, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
}

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--color-accent-orange);
  text-decoration: underline;
}

/* ── App 容器 ── */
#app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}

/* ── Header ── */
.chat-header {
  flex-shrink: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: rgba(13, 23, 48, 0.85);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  position: relative;
  z-index: 10;
}

.chat-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent-blue), var(--color-accent-orange), transparent);
  opacity: 0.4;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  /* 讓 flex-item 能正確縮小防止最小寬度問題 */
  min-width: 0;
  flex-shrink: 1;
  overflow: hidden;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-orange), var(--color-accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--glow-orange);
  flex-shrink: 0;
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { box-shadow: var(--glow-orange); }
  50% { box-shadow: 0 0 30px rgba(249, 115, 22, 0.5); }
}

.header-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
  line-height: 1.2;
  /* 單行顯示 + 超出省略防止窄螢幕跑版 */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* header-text 需要 overflow:hidden 才能 text-overflow 作用 */
.header-text {
  min-width: 0;
  overflow: hidden;
}

.header-subtitle {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.header-counter {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 12px;
  white-space: nowrap;
}

.counter-label {
  color: var(--color-text-secondary);
  font-size: 11px;
}

.counter-value {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-accent-orange);
  letter-spacing: 0.02em;
  min-width: 40px;
  text-align: center;
  transition: transform 0.3s var(--ease-spring);
}

.counter-value.bump {
  transform: scale(1.3);
}

.counter-star {
  font-size: 12px;
}

/* ── Header 右側群組（計數器 + Teams 連結） ── */
.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ── Teams 常駐按鈕（Header 右上角提示更顯眼設定） ── */
.header-teams-link {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--color-teams-purple-dim);
  border: 1.5px solid var(--color-teams-purple);
  border-radius: 20px;
  padding: 6px 14px;
  font-family: 'Noto Sans TC', 'Inter', sans-serif;
  color: var(--color-teams-purple);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--glow-teams);
  transition: background 0.2s var(--ease-out),
              border-color 0.2s var(--ease-out),
              box-shadow 0.2s var(--ease-out),
              transform 0.15s var(--ease-spring);
}

.header-teams-link:hover {
  background: rgba(123, 131, 235, 0.3);
  border-color: var(--color-teams-purple-light);
  box-shadow: var(--glow-teams-strong);
  transform: scale(1.07);
}

.header-teams-link:active {
  transform: scale(0.96);
  box-shadow: var(--glow-teams);
}

.header-teams-link .teams-svg-icon {
  width: 22px;
  height: 20px;
  flex-shrink: 0;
}

.header-teams-link .teams-link-text {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* ── Teams 複製按鈕（聊天區，繼承 quick-btn） ── */
.quick-btn.teams-copy-btn {
  border-color: var(--glass-border-active);
  color: var(--color-accent-blue);
}

.quick-btn.teams-copy-btn:hover:not(:disabled) {
  background: var(--color-accent-blue-dim);
  border-color: var(--color-accent-blue);
}

/* ── Chat Main Area ── */
.chat-main {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.chat-messages {
  height: 100%;
  overflow-y: auto;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}
.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
}

/* ── Message Wrappers ── */
.msg-wrapper {
  display: flex;
  gap: 10px;
  animation: msgSlideIn 0.35s var(--ease-out) both;
}

@keyframes msgSlideIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.msg-wrapper.bot {
  align-items: flex-start;
}

.msg-wrapper.user {
  align-items: flex-end;
  flex-direction: row-reverse;
}

/* ── Avatars ── */
.msg-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.msg-wrapper.bot .msg-avatar {
  background: linear-gradient(135deg, var(--avatar-bot-from), var(--avatar-bot-to));
  border: 1px solid var(--glass-border-active);
}

.msg-wrapper.user .msg-avatar {
  background: linear-gradient(135deg, var(--color-accent-orange), var(--color-accent-orange-light));
  border: 1px solid rgba(249, 115, 22, 0.3);
}

/* ── Message Content ── */
.msg-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: calc(100% - 60px);
}

/* ── Bubble ── */
.msg-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  line-height: 1.65;
  word-break: break-word;
  position: relative;
}

.msg-wrapper.bot .msg-bubble {
  background: var(--bubble-bot-bg);
  border: 1px solid var(--bubble-bot-border);
  border-top-left-radius: 4px;
  backdrop-filter: blur(4px);
  color: var(--color-text-primary);
}

.msg-wrapper.user .msg-bubble {
  background: linear-gradient(135deg, var(--bubble-user-from), var(--bubble-user-to));
  border-top-right-radius: 4px;
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
}

.msg-bubble strong {
  font-weight: 600;
}

.msg-bubble a {
  color: var(--color-accent-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.msg-wrapper.user .msg-bubble a {
  color: rgba(255,255,255,0.9);
}

/* ── Button Group (quick-reply buttons) ── */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 44px;
  animation: msgSlideIn 0.35s var(--ease-out) 0.1s both;
}

.quick-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--color-text-primary);
  transition: all 0.2s var(--ease-out);
  white-space: nowrap;
}

.quick-btn:hover:not(:disabled) {
  background: var(--glass-bg-hover);
  border-color: var(--color-accent-blue);
  color: var(--color-accent-blue);
  transform: translateY(-1px);
  box-shadow: var(--glow-blue);
}

.quick-btn:active:not(:disabled) {
  transform: translateY(0);
}

.quick-btn.primary {
  background: linear-gradient(135deg, var(--color-accent-orange), var(--color-accent-orange-light));
  border-color: transparent;
  color: var(--color-white);
  box-shadow: 0 2px 12px rgba(249, 115, 22, 0.3);
}

.quick-btn.primary:hover:not(:disabled) {
  box-shadow: var(--glow-orange), 0 4px 16px rgba(249, 115, 22, 0.4);
  transform: translateY(-2px);
  color: var(--color-white);
}

/* ── 教學按鈕：藍色強調樣式 ── */
.quick-btn.accent {
  background: linear-gradient(135deg, #0ea5e9, var(--color-accent-blue));
  border-color: transparent;
  color: var(--color-white);
  box-shadow: 0 2px 12px rgba(56, 189, 248, 0.35);
  font-weight: 600;
}

.quick-btn.accent:hover:not(:disabled) {
  box-shadow: var(--glow-blue-strong), 0 4px 16px rgba(56, 189, 248, 0.45);
  transform: translateY(-2px);
  color: var(--color-white);
}

.quick-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ── Typing Indicator ── */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  background: var(--bubble-bot-bg);
  border: 1px solid var(--bubble-bot-border);
  border-radius: var(--radius-lg);
  border-top-left-radius: 4px;
  width: fit-content;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-blue);
  animation: typingBounce 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* ── Link Button in bubble ── */
.doc-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 8px 14px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-accent-blue);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}

.doc-link-btn:hover {
  background: rgba(56, 189, 248, 0.25);
  text-decoration: none;
  color: var(--color-accent-blue);
  transform: translateX(2px);
}

/* ── Footer / Input Area ── */
.chat-footer {
  flex-shrink: 0;
  padding: 12px 16px 10px;
  background: rgba(13, 23, 48, 0.85);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--glass-border);
}

.input-container {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--glass-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-xl);
  padding: 8px 8px 8px 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-container:focus-within {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--input-text);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
  resize: none;
  max-height: 120px;
  overflow-y: auto;
  padding: 4px 0;
}

.chat-input::placeholder {
  color: var(--color-text-muted);
}

.chat-input::-webkit-scrollbar {
  width: 3px;
}

.send-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-orange), var(--color-accent-orange-light));
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s var(--ease-out);
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

.send-btn svg {
  width: 16px;
  height: 16px;
  color: var(--color-white);
  transform: translateX(1px);
}

.send-btn:hover {
  transform: scale(1.08);
  box-shadow: var(--glow-orange);
}

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

.footer-note {
  text-align: center;
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 6px;
  letter-spacing: 0.03em;
}

/* ============================================================
   MODAL 報修表單
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
  animation: overlayFadeIn 0.25s ease both;
}

@keyframes overlayFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-overlay[hidden] {
  display: none;
}

.modal-container {
  width: 100%;
  max-width: 760px;
  max-height: 88dvh;
  background: var(--color-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  overflow-y: auto;
  animation: modalSlideUp 0.35s var(--ease-out) both;
}

@keyframes modalSlideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

.modal-container::-webkit-scrollbar { width: 4px; }
.modal-container::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 24px 24px 16px;
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  background: var(--color-bg-secondary);
  z-index: 1;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.modal-subtitle {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}

.modal-close:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--color-danger);
}

/* ── Report Form ── */
.report-form {
  padding: 20px 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.required {
  color: var(--color-accent-orange);
  margin-left: 2px;
}

.form-group input,
.form-group textarea {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--input-text);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.form-group input.error,
.form-group textarea.error {
  border-color: rgba(239, 68, 68, 0.6);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 90px;
}

/* ── 24小時制提示（可維修時間 label 行內） ── */
.form-24h-note {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  margin-left: 4px;
}

/* ── 可維修時間輸入區域 ── */
.repair-time-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.repair-time-input {
  width: 52px;
  text-align: center;
  padding: 10px 6px !important;
}

.repair-time-sep {
  font-size: 13px;
  color: var(--color-text-secondary);
  user-select: none;
  flex-shrink: 0;
}

.repair-time-dash {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0 2px;
  flex-shrink: 0;
}

/* ── 欄位提示 ── */
.field-hint {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding: 8px 10px;
  background: rgba(56, 189, 248, 0.05);
  border-left: 2px solid var(--color-accent-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.field-hint strong {
  color: var(--color-accent-orange);
}

/* ── 填入現在時間快捷按鈕列 ── */
.repair-time-now-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.btn-fill-now {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  background: rgba(56, 189, 248, 0.10);
  border: 1px solid rgba(56, 189, 248, 0.30);
  border-radius: 20px;
  color: var(--color-accent-blue);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s var(--ease-out),
              border-color 0.2s var(--ease-out),
              transform 0.15s var(--ease-spring),
              box-shadow 0.2s var(--ease-out);
  white-space: nowrap;
  user-select: none;
}

.btn-fill-now:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--color-accent-blue);
  box-shadow: var(--glow-blue);
  transform: translateY(-1px);
}

.btn-fill-now:active {
  transform: translateY(0);
  box-shadow: none;
}

/* ── 填入時間按鈕群組（標籤 + 按鈕垂直堆疊） ── */
.fill-now-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.fill-now-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  user-select: none;
}

/* ── 問題描述業務範圍聲明 ── */
.field-scope-note {
  font-size: 12px;
  color: var(--color-accent-orange);
  margin: -2px 0 2px 0;
  letter-spacing: 0.02em;
}

.field-scope-note strong {
  font-weight: 700;
}

/* ── 表單錯誤訊息 ── */
.form-error {
  font-size: 13px;
  color: var(--color-danger-light);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

/* Form Buttons */
.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 4px;
}

.btn-primary,
.btn-secondary {
  padding: 11px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all 0.2s var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-orange), var(--color-accent-orange-light));
  color: var(--color-white);
  box-shadow: 0 2px 12px rgba(249, 115, 22, 0.3);
  min-width: 120px;
  justify-content: center;
}

.btn-primary:hover:not(:disabled) {
  box-shadow: var(--glow-orange);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
}

.btn-secondary:hover {
  background: var(--glass-bg-hover);
  color: var(--color-text-primary);
}

/* Loading dots in button */
.btn-loading {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}

.loading-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-white);
  animation: typingBounce 1.2s ease-in-out infinite;
}
.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }

/* ── Success State（報修成功訊息泡泡） ── */
.msg-wrapper.success .msg-bubble {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.25);
}

/* ============================================================
   RESPONSIVE 響應式設計
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --header-height: 60px;
  }

  .header-title { font-size: 13px; }
  .header-subtitle { display: none; }

  /* 窄螢幕隱藏計數器（JS 仍照常累加，只是不顯示） */
  .header-counter { display: none; }

  .chat-messages { padding: 14px 12px; gap: 10px; }

  .msg-bubble { font-size: 13px; padding: 10px 14px; }

  .btn-group { padding-left: 0; }

  .quick-btn { font-size: 12px; padding: 7px 12px; }

  .modal-container { max-height: 94dvh; border-radius: 20px 20px 0 0; }

  .report-form { padding: 16px 18px 28px; }

  .form-row { grid-template-columns: 1fr; gap: 16px; }

  /* iOS Safari：input font-size < 16px 會觸發自動縮放，強制設為 16px */
  .form-group input,
  .form-group textarea,
  .chat-input {
    font-size: 16px;
  }

  .form-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}

/* ── 極窄螢幕（iPhone SE 等 <360px） ── */
@media (max-width: 360px) {
  /* Teams 按鈕文字隱藏，僅保留 icon */
  .teams-link-text { display: none; }
  /* 縮小 padding，降低最小寬度需求 */
  .header-teams-link { padding: 5px 8px; gap: 4px; }
  /* aria-label 已提供，隱藏文字不影響無障礙 */
}

@media (min-width: 760px) {
  #app {
    border-left: 1px solid var(--glass-border);
    border-right: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
  }
  .modal-overlay { align-items: center; }
  .modal-container {
    border-radius: var(--radius-xl);
    max-height: 80dvh;
    max-width: 560px;
  }
}

/*    Accessibility    */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   語言切換懸浮按鈕（中/EN Toggle）
   ============================================================ */
.lang-toggle-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 15;

  width: 2.75rem;
  height: 2.75rem;
  min-width: 44px;   /* 觸控目標最小尺寸，WCAG 2.5.5 */
  min-height: 44px;

  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;

  background: var(--glass-bg);
  border: 1.5px solid var(--glass-border-active);
  color: var(--color-accent-blue);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-sm);

  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;

  transition: transform 0.2s var(--ease-spring),
              box-shadow 0.2s var(--ease-out),
              background 0.2s var(--ease-out),
              border-color 0.2s var(--ease-out);
}

.lang-toggle-btn:hover {
  background: var(--glass-bg-hover);
  border-color: var(--color-accent-blue);
  box-shadow: var(--glow-blue);
  transform: scale(1.08);
}

.lang-toggle-btn:active {
  transform: scale(0.94);
}

.lang-toggle-btn:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

.lang-toggle-btn .lang-toggle-label {
  pointer-events: none;
}

/* 平板/手機：分界線變窄，按鈕同步縮小並貼近邊角，仍維持在
   .chat-main 右上角 */
@media (max-width: 640px) {
  .lang-toggle-btn {
    top: 0.6rem;
    right: 0.6rem;
    width: 2.5rem;
    height: 2.5rem;
    font-size: 0.72rem;
  }
}

@media (max-width: 360px) {
  .lang-toggle-btn {
    top: 0.5rem;
    right: 0.5rem;
    width: 2.3rem;
    height: 2.3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lang-toggle-btn { transition: none; }
}

/* ============================================================
   隱藏 reCAPTCHA v3 浮動徽章
   ============================================================ */
.grecaptcha-badge {
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* reCAPTCHA 合規揭露文字樣式 */
.recaptcha-disclosure {
  text-align: center;
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 4px;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.recaptcha-disclosure a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.recaptcha-disclosure a:hover {
  color: var(--color-accent-blue);
}

/* ── Query Modal ── */
.query-modal-container {
  max-width: 420px;
}

.query-form {
  padding: 20px 24px 28px;
}

/* ── Query Result Cards（聊天泡泡中的案件卡片）── */
.msg-bubble .query-case-card {
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
}

.msg-bubble .query-case-card + .query-case-card {
  margin-top: 10px;
}

.query-case-card .status-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.query-case-card .status-tag.pending {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.query-case-card .status-tag.dispatched {
  background: rgba(56, 189, 248, 0.12);
  color: var(--color-accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.query-case-card .status-tag.completed {
  background: rgba(74, 222, 128, 0.12);
  color: var(--color-success);
  border: 1px solid rgba(74, 222, 128, 0.3);
}

/* ============================================================
   Wi-Fi 機教學 Modal
   ============================================================ */

/* 容器尺寸（對齊 query-modal-container 命名風格） */
.wifi-modal-container {
  max-width: 480px;
}

/* Modal 本體 padding */
.wifi-modal-body {
  padding: 20px 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── 單一步驟卡片 ── */
.wifi-step {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: border-color 0.2s var(--ease-out);
}

.wifi-step:hover {
  border-color: var(--glass-border-active);
}

/* ── 步驟標題列（編號 + 標題） ── */
.wifi-step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

/* ── 步驟編號圓形標籤 ── */
.wifi-step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-orange), var(--color-accent-orange-light));
  color: var(--color-white);
  font-size: 13px;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

/* ── 步驟標題文字 ── */
.wifi-step-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* ── 步驟說明文字 ── */
.wifi-step-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.wifi-step-desc strong {
  color: var(--color-accent-blue);
  font-weight: 600;
}

/* ── 步驟無序清單（連接裝置） ── */
.wifi-step-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.wifi-step-list li::before {
  content: '•';
  color: var(--color-accent-orange);
  font-weight: 700;
  margin-right: 6px;
}

.wifi-step-list strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

/* ── 步驟有序清單（設定 IP） ── */
.wifi-step-ol {
  list-style: none;
  counter-reset: wifi-step-counter;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.wifi-step-ol li {
  counter-increment: wifi-step-counter;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.wifi-step-ol li::before {
  content: counter(wifi-step-counter) '.';
  color: var(--color-accent-orange);
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  flex-shrink: 0;
}

.wifi-step-ol strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

/* ── 操作按鈕區（僅「關閉」按鈕，靠右對齊） ── */
.wifi-modal-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 4px;
}

/* ── 響應式：窄螢幕調整 ── */
@media (max-width: 640px) {
  .wifi-modal-body {
    padding: 16px 18px 24px;
    gap: 12px;
  }

  .wifi-step {
    padding: 12px 14px;
  }

  .wifi-step-title {
    font-size: 13px;
  }

  .wifi-modal-actions {
    justify-content: stretch;
  }

  .wifi-modal-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}