/* =========================================================================
   企業新人手冊 AI 智慧導航庫 — 獨立管理員後台專屬樣式 (admin.css)
   ========================================================================= */

.admin-body {
  overflow-y: auto !important;
  height: auto !important;
  min-height: 100vh;
  background-color: var(--bg-primary);
}

.admin-top-badge {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: var(--warning);
  font-size: 0.76rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-weight: 600;
}

/* 後台容器 */
.admin-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  animation: fadeIn 0.3s ease;
}

/* 頁面標頭 */
.admin-page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.admin-page-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.admin-page-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* 數據概覽指標卡 (Dashboard Cards) */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* 頁籤導覽列 (Tabs Navigation) */
.admin-tabs-nav {
  display: flex;
  gap: 0.75rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: -2px;
}

.admin-nav-tab {
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  font-size: 0.96rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: all 0.2s ease;
  margin-bottom: -2px;
  font-family: inherit;
}

.admin-nav-tab:hover {
  color: var(--text-primary);
}

.admin-nav-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-badge {
  background: var(--warning);
  color: #000;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
}

/* 頁籤內容面板 */
.admin-tab-pane {
  display: none;
  flex-direction: column;
  gap: 1.25rem;
}

.admin-tab-pane.active {
  display: flex;
}

/* 搜尋與篩選列 */
.filter-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  background: var(--bg-secondary);
  padding: 0.9rem 1.2rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}

.search-box {
  flex: 1;
  min-width: 260px;
}

.filter-select-group {
  display: flex;
  gap: 0.6rem;
}

/* 表格容器與設計 */
.table-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.full-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.full-table th {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-muted);
  font-weight: 600;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.full-table td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
}

.full-table tr:last-child td {
  border-bottom: none;
}

.full-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.table-loading {
  text-align: center;
  padding: 3rem 1rem !important;
  color: var(--text-muted);
}

/* 狀態徽章 */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status-pill.approved {
  background: rgba(52, 211, 153, 0.15);
  color: var(--success);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.status-pill.pending {
  background: rgba(251, 191, 36, 0.15);
  color: var(--warning);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.status-pill.rejected {
  background: rgba(248, 113, 113, 0.15);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

.role-tag {
  font-size: 0.78rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}
.role-tag.admin {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.role-tag.member {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-muted);
}

/* 操作按鈕群 */
.action-btn-group {
  display: inline-flex;
  gap: 0.45rem;
  justify-content: flex-end;
}

/* 新增手冊區塊 (展開式表單) */
.add-book-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  animation: fadeIn 0.2s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.add-book-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.add-book-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
}

.md-textarea {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  resize: vertical;
}

/* 權限不足提示遮罩 */
.access-denied-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 120px);
  padding: 2rem;
}

.access-denied-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 3rem 2.5rem;
  max-width: 480px;
  text-align: center;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

@media (max-width: 768px) {
  .admin-page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .form-row-2 {
    grid-template-columns: 1fr;
  }
  .filter-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box {
    width: 100%;
  }
}