/**
 * ============================================================================
 * 【個人工作文件庫 - 視覺樣式表 (style.css)】
 * ============================================================================
 * 親愛的新手朋友：
 * 這份檔案是我們網站的「外表」與「化妝師」。CSS 負責掌控網站的所有排版、顏色、字型與動畫。
 * 
 * 為了實現「低調亮色系 (Subtle Light Theme)」，我們採用了如高級紙張般舒服的暖白與石板灰，
 * 搭配微弱的玻璃模糊 (Glassmorphism)、陰影、以及極其精緻的邊框。
 * 
 * 這份檔案寫入了極為豐富的註解，詳細說明每個排版（Grid / Flexbox）與樣式屬性的原理。
 * 您可以對照 index.html 閱讀，這是一份極佳的 CSS 實戰教材！
 */

/* ============================================================================
   1. 設計系統與全域變數 (Design Tokens & CSS Variables)
   ============================================================================ */
:root {
  /* 字型定義 */
  --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;

  /* 低調亮色系色彩面板 (Subtle Light Palette) */
  --bg-app: #F1F5F9;           /* 整個網頁的最底層背景色（極軟的淺石板灰） */
  --bg-card: #FFFFFF;          /* 卡片與區塊的底色（純白） */
  --bg-header: rgba(255, 255, 255, 0.85); /* 頂部導覽列底色（半透明，用於玻璃模糊） */
  
  --text-main: #0F172A;        /* 主要文字顏色（深石板藍，比純黑更柔和、更高級） */
  --text-muted: #64748B;       /* 輔助/說明性文字顏色（中性冷灰） */
  --border-light: #E2E8F0;     /* 標準卡片與表格的細邊框顏色 */
  
  /* 精緻的主題與狀態色 */
  --primary: #2563EB;          /* 主動點綴色（鋼鐵藍），用於選取狀態與按鈕 */
  --primary-hover: #1D4ED8;    /* 鋼鐵藍懸停時的深色 */
  --primary-light: #EFF6FF;    /* 鋼鐵藍的微弱背景色（點選項目時的高亮底色） */
  
  --success: #10B981;          /* 成功/已審核狀態色（森林綠） */
  --success-light: #ECFDF5;
  --warning: #F59E0B;          /* 警告/審閱中狀態色（琥珀黃） */
  --warning-light: #FEF3C7;
  
  /* 陰影與圓角 */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 8px -1px rgba(15, 23, 42, 0.03);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* 動態過渡時間 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1); /* 平滑貝氏曲線 */
}

/* ============================================================================
   2. 基礎重設與重置 (Global Reset)
   ============================================================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden; /* 防止整個網頁出現滾動條，讓子區塊自行滾動，維持高階 App 質感 */
  height: 100vh;
}

/* 自訂漂亮的瀏覽器滾動條 (Scrollbar Style) */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}

/* ============================================================================
   3. 版面佈局架構 (Main App Layout)
   ============================================================================ */
/* 全域大包裝，採用垂直 Flex 排版 */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh; /* 撐滿螢幕高度 */
}

/* 頂部主導覽列 */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-light);
  /* 玻璃擬物化核心代碼 */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}

/* 標誌區域 */
.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  font-size: 28px;
  background: linear-gradient(135deg, var(--primary), #06B6D4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.1));
}
.logo-text h1 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.hub-badge {
  background-color: var(--text-main);
  color: #FFFFFF;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}
.logo-text p {
  font-size: 11px;
  color: var(--text-muted);
}

/* 系統狀態與時間 */
.header-status {
  display: flex;
  align-items: center;
  gap: 20px;
}
.system-time {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.time-dot {
  width: 6px;
  height: 6px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite; /* 發光呼吸燈動畫 */
}
.user-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  border-left: 1px solid var(--border-light);
  padding-left: 20px;
}
.avatar {
  width: 28px;
  height: 28px;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 13px;
  border: 1px solid rgba(37, 99, 235, 0.2);
}
.user-name {
  font-size: 13px;
  font-weight: 500;
}

/* 主內容區：左右分欄 */
.app-main {
  display: flex;
  flex: 1;
  overflow: hidden; /* 防止主內容溢出 */
}

/* 側邊欄收折按鈕樣式 */
.toggle-sidebar-btn {
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  font-size: 14px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  margin-right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-weight: bold;
}
.toggle-sidebar-btn:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.3);
}

/* 左側控制台面板 (寬度可被 JS 拖曳或收折) */
.left-pane {
  width: 50%; /* 初始寬度為 50% */
  min-width: 350px; /* 限制最小寬度，避免縮到字擠在一起 */
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto; /* 只有左側可上下滾動 */
  transition: width var(--transition-normal), padding var(--transition-normal), opacity var(--transition-normal);
  opacity: 1;
}

/* 左側面板收折後的隱藏狀態 */
.left-pane.collapsed {
  width: 0 !important;
  min-width: 0 !important;
  padding: 0 !important;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* 拖曳調整寬度分隔線 (Resizer Bar) */
.resizer-bar {
  width: 6px;
  background-color: var(--border-light);
  cursor: col-resize;
  position: relative;
  z-index: 50;
  transition: background-color var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
}
.resizer-bar:hover,
.resizer-bar.dragging {
  background-color: var(--primary); /* 懸停或拖動時呈現高亮鋼鐵藍 */
}
.resizer-line {
  position: absolute;
  top: 0;
  left: 2px;
  width: 2px;
  height: 100%;
  background-color: transparent;
}
/* 當左側被收折時，分隔線也要隱藏 */
.resizer-bar.collapsed {
  display: none;
}

/* 右側預覽面板 */
.right-pane {
  flex: 1; /* 自動填滿剩餘寬度 */
  background-color: #FFFFFF;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 350px;
}

/* ============================================================================
   4. 左欄元件設計 (Left Pane Components)
   ============================================================================ */
/* 通用高質感卡片樣式 */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.card:hover {
  box-shadow: var(--shadow-md);
}

/* 統計卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}
.stat-icon {
  font-size: 20px;
  width: 38px;
  height: 38px;
  background-color: #F8FAFC;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.stat-info {
  display: flex;
  flex-direction: column;
}
.stat-num {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}
.stat-label {
  font-size: 11px;
  color: var(--text-muted);
}

/* 搜尋與過濾面板 */
.control-panel {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  font-size: 14px;
}
#search-input {
  width: 100%;
  padding: 10px 38px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  color: var(--text-main);
  background-color: #F8FAFC;
  outline: none;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}
#search-input:focus {
  border-color: var(--primary);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.clear-btn {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  padding: 4px;
}
.clear-btn:hover {
  color: var(--text-main);
}

/* 標籤過濾按鈕組 */
.tags-filter {
  display: flex;
  align-items: center;
  gap: 8px;
}
.filter-title {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}
.tag-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.tag-btn {
  background-color: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.tag-btn:hover {
  background-color: #F1F5F9;
  color: var(--text-main);
}
.tag-btn.active {
  background-color: var(--text-main);
  border-color: var(--text-main);
  color: #FFFFFF;
}

/* 檔案庫列表主區塊 */
.library-card {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 400px;
}
.library-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}
.lib-title h3 {
  font-size: 15px;
  font-weight: 700;
}
.lib-title p {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* 檔案類型分頁標籤 */
.type-tabs {
  display: flex;
  background-color: #F1F5F9;
  padding: 3px;
  border-radius: var(--radius-sm);
}
.tab-btn {
  background: none;
  border: none;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  transition: all var(--transition-fast);
}
.tab-btn:hover {
  color: var(--text-main);
}
.tab-btn.active {
  background-color: #FFFFFF;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* 檔案表格區 */
.table-wrapper {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}
.file-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}
.file-table th {
  background-color: #F8FAFC;
  padding: 10px 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 10;
}
.file-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
}
.file-table tbody tr {
  cursor: pointer;
  transition: background-color var(--transition-fast);
}
.file-table tbody tr:hover {
  background-color: #F8FAFC;
}
.file-table tbody tr.selected {
  background-color: var(--primary-light);
}

/* 表格內的列格式 */
.file-name-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}
.file-icon {
  font-size: 16px;
}
.file-table td strong {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

/* 狀態徽章樣式 */
.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 600;
  border-radius: 12px;
  text-transform: uppercase;
}
.badge-active { background-color: var(--primary-light); color: var(--primary); }
.badge-review { background-color: var(--warning-light); color: var(--warning); }
.badge-approved { background-color: var(--success-light); color: var(--success); }
.badge-archived { background-color: #F1F5F9; color: #475569; }

/* ============================================================================
   5. 右欄：文件預覽器佈局 (Right Pane & Previewers)
   ============================================================================ */
/* 狀態一：空置狀態 (Placeholder) */
.preview-placeholder {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #F8FAFC;
  padding: 40px;
  text-align: center;
}
.placeholder-content {
  max-width: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.placeholder-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.8;
  animation: float 4s ease-in-out infinite; /* 懸浮微動畫 */
}
.placeholder-content h2 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
}
.placeholder-content p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.feature-highlights {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
  background-color: #FFFFFF;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-light);
  width: 100%;
}
.feat-item {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  gap: 8px;
}
.feat-item span {
  color: var(--primary);
}

/* 狀態二：已啟用預覽 */
.preview-active {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* 預覽器頂部資訊欄 */
.viewer-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #FFFFFF;
}
.file-info-group {
  display: flex;
  align-items: center;
  gap: 16px;
}
.file-icon-badge {
  width: 44px;
  height: 44px;
  background-color: #F1F5F9;
  border-radius: var(--radius-sm);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.file-info-group h2 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}
.meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
}
.meta-tag {
  background-color: #F1F5F9;
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}
.meta-divider {
  color: var(--border-light);
}

/* 頂部操作按鈕 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.status-badge {
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
}
.action-btn {
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.download-btn {
  background-color: var(--primary);
  border: 1px solid var(--primary);
  color: #FFFFFF;
}
.download-btn:hover {
  background-color: var(--primary-hover);
}
.close-preview-btn {
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-muted);
}
.close-preview-btn:hover {
  background-color: #F1F5F9;
  color: var(--text-main);
}

/* 檔案說明盒 */
.file-desc-box {
  padding: 10px 24px;
  background-color: #F8FAFC;
  border-bottom: 1px solid var(--border-light);
  font-size: 12px;
  color: var(--text-muted);
}
.file-desc-box strong {
  color: var(--text-main);
}

/* 預覽器主身體容器 */
.viewer-body {
  flex: 1;
  position: relative;
  background-color: #F1F5F9;
  overflow: hidden;
}

/* 預覽加載動畫疊加層 */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 100;
}
.loader-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid #E2E8F0;
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.loading-overlay p {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

/* 通用預覽區塊容器 */
.viewer-workspace {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ============================================================================
   6. 各別預覽器專屬樣式 (Specialist Preview Workspace Styles)
   ============================================================================ */

/* ----------------------------------------------------------------------------
   A. CAD / DWG 向量預覽面板
   ---------------------------------------------------------------------------- */
.cad-workspace {
  background-color: #F8FAFC;
}

/* CAD 上方專屬工具列 */
.cad-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-light);
}
.tool-group {
  display: flex;
  align-items: center;
  gap: 6px;
}
.tool-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}
.cad-tool-btn {
  background-color: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.cad-tool-btn:hover {
  background-color: #E2E8F0;
  color: var(--text-main);
}
.cad-tool-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
}

/* 雙欄左右排版：左圖面、右圖層 */
.cad-split-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* CAD 視埠 (Viewport) - 這是可縮放平移的主視窗 */
.cad-viewport {
  flex: 1;
  height: 100%;
  position: relative;
  overflow: hidden; /* 超過範圍要隱藏 */
  background-color: #FAFAF9; /* 白紙底色 (Modern White) */
  background-image: radial-gradient(#E2E8F0 1.2px, transparent 1.2px); /* 發光網點輔助背景 */
  background-size: 20px 20px;
  cursor: grab; /* 抓取手勢，提示可以拖曳 */
  transition: background-color var(--transition-normal);
}
.cad-viewport:active {
  cursor: grabbing; /* 拖曳時的手勢 */
}

/* 專業深色模式下的背景覆蓋 */
.cad-viewport.blueprint-mode {
  background-color: #0F172A; /* 如同作業系統的深色模式 (Deep Charcoal Slate) */
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* 真正容納 SVG 畫布的包裝層 */
.cad-canvas-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: center center; /* 以正中心為縮放點 */
}
.cad-canvas-wrapper svg {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08); /* 擬真圖紙微幅投影 */
  background-color: transparent;
}

/* HUD 指示器 */
.cad-hud-hint {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background-color: rgba(15, 23, 42, 0.8);
  color: #FFFFFF;
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 4px;
  pointer-events: none; /* 防止滑鼠點擊攔截，讓使用者可直接拖曳 */
  backdrop-filter: blur(4px);
}

/* CAD 右側圖層管理器 */
.cad-layer-panel {
  width: 180px;
  background-color: #FFFFFF;
  border-left: 1px solid var(--border-light);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}
.cad-layer-panel h4 {
  font-size: 13px;
  font-weight: 700;
}
.panel-subtitle {
  font-size: 10px;
  color: var(--text-muted);
}
.layer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.layer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  cursor: pointer;
}
.layer-checkbox {
  width: 14px;
  height: 14px;
  cursor: pointer;
}
.layer-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

/* ----------------------------------------------------------------------------
   B. PDF 規範閱讀器
   ---------------------------------------------------------------------------- */
.pdf-workspace {
  background-color: #E2E8F0;
}
.pdf-container {
  display: flex;
  height: 100%;
  overflow: hidden;
}
.pdf-sidebar {
  width: 160px;
  background-color: #FFFFFF;
  border-right: 1px solid var(--border-light);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}
.pdf-sidebar h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}
.pdf-outline-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.pdf-outline-item {
  font-size: 11px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-main);
  transition: all var(--transition-fast);
}
.pdf-outline-item:hover {
  background-color: #F1F5F9;
}
.pdf-outline-item.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}
.pdf-outline-page {
  font-size: 9px;
  color: var(--text-muted);
  display: block;
}

.pdf-pages-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  overflow-y: auto;
}
.pdf-control-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 12px;
  box-shadow: var(--shadow-sm);
}
.pdf-btn {
  background: none;
  border: 1px solid var(--border-light);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
}
.pdf-btn:hover {
  background-color: #F1F5F9;
}
.pdf-page-sheet {
  background-color: #FFFFFF;
  flex: 1;
  padding: 40px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 500px;
}
.pdf-page-header {
  font-size: 10px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 8px;
  text-align: center;
}
.pdf-page-body {
  flex: 1;
  font-size: 13px;
  line-height: 1.8;
  color: #334155;
}
.pdf-page-body h4 {
  font-size: 15px;
  color: #0F172A;
  margin-bottom: 8px;
}
.pdf-page-footer {
  font-size: 10px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 8px;
  text-align: center;
}

/* ----------------------------------------------------------------------------
   C. Word (DOCX) 委託合約書閱讀器
   ---------------------------------------------------------------------------- */
.docx-workspace {
  padding: 24px;
  overflow-y: auto;
  background-color: #E2E8F0;
  display: flex;
  justify-content: center;
}
.docx-paper {
  background-color: #FFFFFF;
  width: 100%;
  max-width: 650px;
  padding: 60px 50px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  position: relative;
  overflow: hidden;
}
.docx-watermark {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 10px;
  color: #F1F5F9;
  border: 1px solid #F1F5F9;
  padding: 2px 6px;
  font-weight: 700;
  pointer-events: none;
}
.contract-doc {
  font-size: 13px;
  color: #334155;
}

/* ----------------------------------------------------------------------------
   D. Excel (XLSX) 採購預算表閱讀器
   ---------------------------------------------------------------------------- */
.xlsx-workspace {
  background-color: #F8FAFC;
  padding: 16px;
  display: flex;
  flex-direction: column;
}
.xlsx-sheet-control {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.excel-tabs {
  display: flex;
  background-color: #E2E8F0;
  padding: 2px;
  border-radius: 4px;
}
.excel-tab {
  background: none;
  border: none;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 3px;
  color: var(--text-muted);
}
.excel-tab.active {
  background-color: #10B981; /* Excel 標誌綠 */
  color: #FFFFFF;
}
.excel-btn {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
}
.excel-btn:hover {
  background-color: #F1F5F9;
}
.excel-grid-container {
  flex: 1;
  overflow: auto;
  border: 1px solid var(--border-light);
  background-color: #FFFFFF;
  border-radius: var(--radius-sm);
}
.excel-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono); /* 使用等寬字型，對齊數字 */
  font-size: 11px;
}
.excel-table th {
  background-color: #F1F5F9;
  border: 1px solid #CBD5E1;
  padding: 6px 10px;
  font-weight: bold;
  color: #475569;
  position: sticky;
  top: 0;
  z-index: 10;
}
.excel-table td {
  border: 1px solid #E2E8F0;
  padding: 6px 10px;
  color: #334155;
  white-space: nowrap;
}
.excel-table tbody tr:nth-child(even) {
  background-color: #F8FAFC;
}
.excel-table tbody tr:hover {
  background-color: #EFF6FF;
}
.excel-table tfoot td {
  background-color: #F1F5F9;
  font-weight: bold;
  border-top: 2px solid #CBD5E1;
  color: #0F172A;
  font-size: 12px;
}
.excel-status-bar {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  background-color: #E2E8F0;
  font-size: 10px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
}

/* ----------------------------------------------------------------------------
   E. PowerPoint (PPTX) 簡報幻燈片閱讀器
   ---------------------------------------------------------------------------- */
.pptx-workspace {
  background-color: #475569;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.ppt-viewer-layout {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 600px;
}
.ppt-stage {
  aspect-ratio: 16 / 9; /* 維持 16:9 黃金比例 */
  background-color: #0F172A;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  display: flex;
}
.ppt-slide {
  width: 100%;
  height: 100%;
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(135deg, #1E3A8A, #0F172A);
  color: #FFFFFF;
  border: none;
}
.slide-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
  border-bottom: 2px solid var(--success);
  padding-bottom: 8px;
  letter-spacing: -0.5px;
}
.slide-subtitle {
  font-size: 13px;
  color: #38BDF8;
  margin-bottom: 20px;
}
.slide-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.slide-bullets li {
  font-size: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}
.slide-bullets li::before {
  content: "✦";
  color: var(--success);
  font-weight: bold;
}

/* 簡報控制列 */
.ppt-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: 40px;
  backdrop-filter: blur(8px);
}
.ppt-nav-btn {
  background-color: #FFFFFF;
  border: none;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.ppt-nav-btn:hover {
  background-color: var(--success);
  color: #FFFFFF;
}
.ppt-page-indicator {
  font-size: 12px;
  color: #FFFFFF;
}
.play-btn {
  background-color: var(--success) !important;
  color: #FFFFFF !important;
}

/* ----------------------------------------------------------------------------
   F. 圖片照片展示器
   ---------------------------------------------------------------------------- */
.image-workspace {
  background-color: #1E293B;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.image-viewer-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  max-width: 90%;
}
.image-wrapper {
  background-color: #0F172A;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  max-height: 400px;
}
.image-wrapper img {
  max-width: 100%;
  max-height: 380px;
  object-fit: contain;
  transition: transform var(--transition-normal); /* 旋轉動畫 */
}
.image-controls {
  display: flex;
  gap: 8px;
}
.img-btn {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.img-btn:hover {
  background-color: #FFFFFF;
  color: #0F172A;
}

/* ============================================================================
   7. 動畫特效定義 (Keyframe Animations)
   ============================================================================ */
/* 旋轉動畫，用於加載中效果 */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 呼吸燈特效，用於系統連線狀態指示 */
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* 浮動微動畫，用於空預覽提示的裝飾圖示 */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

/* ============================================================================
   8. 雲端同步與直連視覺樣式 (Cloud Sync Styles)
   ============================================================================ */
.library-actions-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.sync-status-indicator {
  font-size: 11px;
  font-weight: bold;
  padding: 4px 10px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: #F1F5F9;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

/* 同步完成狀態燈 */
.sync-status-indicator.synced {
  background-color: var(--success-light);
  color: var(--success);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
}

/* 同步進行中狀態燈 */
.sync-status-indicator.syncing {
  background-color: var(--warning-light);
  color: var(--warning);
  animation: pulse 2s infinite;
}

/* 雲端同步手動按鈕 */
.sync-action-btn {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
}
.sync-action-btn:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.3);
}

/* ============================================================================
   9. 類型複選框多選按鈕視覺樣式 (Type Checkbox Button Group)
   ============================================================================ */
.checkbox-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.type-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
}

.type-checkbox-label:hover {
  background-color: #F1F5F9;
  color: var(--text-main);
  border-color: #CBD5E1;
}

/* 勾選狀態：加亮鋼鐵藍底色與外框 */
.type-checkbox-label.active,
.type-checkbox-label:has(input:checked) {
  background-color: var(--primary-light);
  border-color: rgba(37, 99, 235, 0.3);
  color: var(--primary);
  font-weight: 600;
}

/* 複選框外觀自訂 */
.type-checkbox-label input[type="checkbox"] {
  width: 13px;
  height: 13px;
  cursor: pointer;
  accent-color: var(--primary);
  margin: 0;
}

/* ============================================================================
   10. 手機與平板響應式設計 (Mobile Responsive RWD Rules)
   ============================================================================ */
@media (max-width: 768px) {
  /* A. 頂部導覽列調整 */
  .app-header {
    padding: 8px 16px !important;
    gap: 8px;
  }
  .logo-text p {
    display: none !important; /* 隱藏長副標題以節省空間 */
  }
  .system-time {
    font-size: 10px !important;
  }

  /* B. 主工作區與左右 Pane 排版切換 */
  .app-main {
    flex-direction: column !important;
    position: relative;
    height: calc(100vh - 53px) !important; /* 扣除 Header 後的高度 */
  }

  .resizer-bar {
    display: none !important; /* 手機版不拖曳調整寬度 */
  }

  /* 雙欄在手機上滿寬 */
  .left-pane, 
  .right-pane {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    flex: 1 !important;
  }

  /* C. 手機端「列表與預覽」的單頁切換 (Slide/Toggle View) */
  /* 預設：只顯示列表區，隱藏預覽區 */
  .left-pane {
    display: flex !important;
    padding: 12px !important;
  }
  
  .right-pane {
    display: none !important;
  }

  /* 當開啟預覽時：隱藏列表區，顯示預覽區，並鋪滿螢幕 */
  .preview-open .left-pane {
    display: none !important;
  }

  .preview-open .right-pane {
    display: flex !important;
  }

  .preview-open .preview-placeholder {
    display: none !important; /* 隱藏手機板的預設提示 */
  }

  .preview-open .preview-active {
    display: flex !important;
  }

  /* D. 四宮格卡片在手機上調整 */
  .stats-grid {
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 8px !important;
  }
  .stat-card {
    padding: 8px !important;
    gap: 6px !important;
  }
  .stat-icon {
    font-size: 16px !important;
    width: 28px !important;
    height: 28px !important;
  }
  .stat-num {
    font-size: 14px !important;
  }
  .stat-label {
    font-size: 9px !important;
  }

  /* E. 搜尋與篩選區 */
  .control-panel {
    padding: 12px !important;
    gap: 10px !important;
  }
  .tags-filter {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 6px !important;
  }
  .checkbox-group {
    gap: 6px !important;
  }
  .type-checkbox-label {
    padding: 3px 10px !important;
    font-size: 10px !important;
  }

  /* F. 表格自適應與極簡化 */
  .library-card {
    padding: 12px !important;
  }
  
  /* 隱藏較不重要的欄位，只留下「名稱」、「類型」、「狀態」 */
  .file-table th:nth-child(3),
  .file-table td:nth-child(3), /* 大小 */
  .file-table th:nth-child(4),
  .file-table td:nth-child(4) { /* 更新日期 */
    display: none !important;
  }
  
  .file-table th, 
  .file-table td {
    padding: 8px !important;
    font-size: 12px !important;
  }

  /* G. 預覽器內部 UI 的自適應調整 */
  .viewer-header {
    padding: 12px 16px !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 12px !important;
  }
  .header-actions {
    width: 100% !important;
    justify-content: flex-end !important;
  }
  .file-desc-box {
    padding: 8px 16px !important;
  }
  
  /* Word 預覽自適應 */
  .docx-paper {
    padding: 16px !important;
    margin: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    min-height: auto !important;
  }

  /* Excel 預覽自適應 */
  .excel-grid-container {
    overflow-x: auto !important; /* 確保超寬表格可滾動 */
  }

  /* CAD 預覽區圖層面版手機上折疊或底置 */
  .cad-split-layout {
    flex-direction: column !important;
  }
  .cad-layer-panel {
    width: 100% !important;
    max-height: 150px !important;
    overflow-y: auto !important;
    border-left: none !important;
    border-top: 1px solid var(--border-light) !important;
    padding: 12px !important;
  }
  
  /* PDF 預覽自適應 */
  .pdf-container {
    flex-direction: column !important;
  }
  .pdf-sidebar {
    width: 100% !important;
    max-height: 100px !important;
    overflow-y: auto !important;
    border-right: none !important;
    border-bottom: 1px solid var(--border-light) !important;
    padding: 8px !important;
  }
}