/* 吉安國小特教行政網站 Style System */
:root {
  --primary: #2b6cb0;
  --primary-hover: #2c5282;
  --primary-light: #ebf8ff;
  
  --secondary: #319795;
  --secondary-hover: #234e52;
  --secondary-light: #e6fffa;
  
  --accent: #d69e2e;
  --accent-light: #fffaf0;
  
  --success: #38a169;
  --danger: #e53e3e;
  --warning: #dd6b20;
  
  --bg-main: #f7fafc;
  --bg-card: #ffffff;
  --bg-alt: #edf2f7;
  
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border: #e2e8f0;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
  --transition: all 0.25s ease-in-out;
}

/* 全域 Undo 刪除復原 Toast */
.toast-undo-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #2d3748;
  color: white;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  z-index: 2000;
  animation: slideUpToast 0.3s ease-out;
  border: 1px solid rgba(255,255,255,0.15);
}

@keyframes slideUpToast {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 導覽列 (Navbar) */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 8px rgba(43, 108, 176, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.school-name {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.site-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.2;
}

.author-by-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(43, 108, 176, 0.08);
  padding: 1px 7px;
  border-radius: 4px;
  margin-left: 0.35rem;
  vertical-align: middle;
  letter-spacing: 0.02em;
  border: 1px solid rgba(43, 108, 176, 0.15);
  line-height: 1.3;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

.nav-internal-item {
  color: var(--warning);
  font-weight: 700;
  background-color: #fffaf0;
  border: 1px solid #feebc8;
}
.nav-internal-item:hover, .nav-internal-item.active {
  background-color: #feebc8;
  color: #c05621;
}

.nav-dropdown {
  position: relative;
}

.dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.8rem;
  color: var(--text-secondary);
  background: none;
  border: none;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.dropdown-btn:hover {
  color: var(--primary);
  background-color: var(--primary-light);
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 230px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem 0;
  z-index: 200;
}

.nav-dropdown:hover .dropdown-content {
  display: block;
  animation: fadeIn 0.2s ease-out;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.dropdown-item:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* 按鈕風格 (Buttons) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-decoration: none;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 10px rgba(43, 108, 176, 0.3);
}

.btn-secondary {
  background-color: var(--secondary);
  color: white;
}
.btn-secondary:hover {
  background-color: var(--secondary-hover);
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-primary);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}
.btn-danger:hover {
  background-color: #c53030;
}

.btn-text {
  background: none;
  color: var(--text-muted);
}
.btn-text:hover {
  color: var(--text-primary);
}

/* 佈局容器 (Container & Views) */
.main-content {
  flex: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-padding {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

.bg-alt {
  background-color: var(--bg-alt);
}

.view-section {
  display: none;
}

.view-section.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Banner */
.hero-banner {
  background: linear-gradient(135deg, #1a365d 0%, #2b6cb0 50%, #319795 100%);
  color: white;
  padding: 3.5rem 1.5rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(5px);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
}

.badge-security {
  background: rgba(56, 161, 105, 0.3);
  border: 1px solid rgba(255,255,255,0.4);
}

.hero-content h1 {
  font-size: 2.25rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.hero-content p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-search {
  display: flex;
  align-items: center;
  background: white;
  border-radius: var(--radius-lg);
  padding: 0.35rem;
  box-shadow: var(--shadow-lg);
  max-width: 650px;
  margin: 0 auto 2rem;
}

.hero-search .search-icon {
  color: var(--text-muted);
  margin-left: 1rem;
  margin-right: 0.5rem;
}

.hero-search input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  padding: 0.5rem 0.25rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-item strong {
  font-size: 1.75rem;
  font-weight: 800;
}

.stat-item span {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* 標頭與節標題 (Section Headers) */
.section-header {
  margin-bottom: 1.75rem;
}

.section-header.space-between {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.section-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 捷徑與連結網格 (Grids & Cards) */
.quick-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.quick-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  text-decoration: none;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.quick-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.border-warning {
  border-color: #feebc8 !important;
}

.quick-card-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.quick-card-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.quick-card-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 連結圖卡網格 (Links Grid) */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.link-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.link-card:hover {
  border-color: var(--secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.link-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.link-card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.link-icon-wrapper {
  width: 36px;
  height: 36px;
  background: var(--secondary-light);
  color: var(--secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.link-card-title h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-alt);
  color: var(--text-secondary);
}

.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-secondary { background: var(--secondary-light); color: var(--secondary); }
.badge-accent { background: var(--accent-light); color: var(--accent); }

.link-description {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex: 1;
}

.link-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

/* 網頁列表 (Pages Grid) */
.pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}

.page-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.page-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.page-card-header {
  margin-bottom: 0.75rem;
}

.page-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 0.5rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.page-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 校內密碼驗證卡片 (Password Card) */
.password-card {
  max-width: 480px;
  margin: 2rem auto;
  text-align: center;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  background: var(--bg-card);
}

.lock-circle {
  width: 64px;
  height: 64px;
  background: #feebc8;
  color: var(--warning);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 1.75rem;
}

.password-card-header h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.password-card-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

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

.password-form input {
  text-align: center;
  font-size: 1.2rem;
  letter-spacing: 0.15em;
  padding: 0.75rem;
}

.unlocked-status-bar {
  background: #f0fff4;
  border: 1px solid #c6f6d5;
  color: #276749;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
}

/* 篩選欄 (Filter Bar) */
.filter-bar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
  background: var(--bg-card);
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.filter-bar .search-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.6rem 1rem;
}

.filter-bar .search-box input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.95rem;
  font-family: inherit;
}

/* Markdown 渲染內容視圖與 <iframe> 內嵌視窗 */
.page-header {
  margin-bottom: 1.75rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.page-title-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.page-title-row h1 {
  font-size: 1.85rem;
  font-weight: 800;
}

.page-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.shadow-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.markdown-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.markdown-body iframe {
  width: 100%;
  min-height: 650px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: 1rem 0;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  color: var(--primary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.markdown-body h2 {
  font-size: 1.4rem;
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: 0.4rem;
}

.markdown-body h3 { font-size: 1.15rem; }

.markdown-body p { margin-bottom: 1rem; }

.markdown-body ul, .markdown-body ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.markdown-body blockquote {
  border-left: 4px solid var(--secondary);
  background: var(--secondary-light);
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
}

.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: 0.6rem 1rem;
  text-align: left;
}

.markdown-body th {
  background: var(--bg-alt);
  font-weight: 700;
}

/* 後台管理 Modal (Admin Panel) */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

.modal-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 950px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-alt);
}

.modal-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-title h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-title .sub-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}

.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-main);
  padding: 0 1.5rem;
}

.tab-btn {
  padding: 0.85rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.tab-btn:hover, .tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.table-wrapper {
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.admin-table th, .admin-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.admin-table th {
  background: var(--bg-alt);
  font-weight: 700;
  color: var(--text-secondary);
}

/* 表單與提示區塊 */
.form-container {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-main);
}

.form-container.hidden {
  display: none;
}

.form-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

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

.form-group {
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.btn-redirect-target {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white !important;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.65rem 1.1rem;
  margin-top: 0.75rem;
  box-shadow: 0 3px 10px rgba(43, 108, 176, 0.25);
  border: none;
  border-radius: var(--radius-md);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-redirect-target:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(43, 108, 176, 0.35);
  background: linear-gradient(135deg, var(--primary-hover), var(--secondary-hover));
}

.domain-text {
  font-size: 0.8rem;
  font-family: monospace;
  word-break: break-all;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.15);
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.md-editor-toolbar {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-bottom: 0.4rem;
}

.md-btn {
  padding: 0.25rem 0.6rem;
  font-size: 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.md-btn:hover { background: var(--bg-alt); }

.md-btn-highlight {
  background: var(--primary-light);
  color: var(--primary);
  border-color: #bee3f8;
  font-weight: 600;
}
.md-btn-highlight:hover {
  background: #bee3f8;
}

.form-tip-box {
  background: #ebf8ff;
  border: 1px solid #bee3f8;
  color: #2b6cb0;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
  line-height: 1.6;
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* 備份區塊 */
.backup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.backup-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.backup-icon {
  width: 48px;
  height: 48px;
}

/* 頁尾 (Footer) */
.footer {
  background: #1a202c;
  color: white;
  padding: 3rem 1.5rem 2rem;
  margin-top: 3rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.footer-info p {
  font-size: 0.85rem;
  opacity: 0.75;
}

.footer-info .copyright {
  margin-top: 1rem;
  font-size: 0.8rem;
  opacity: 0.5;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: white;
  opacity: 0.8;
  text-decoration: none;
  font-size: 0.9rem;
}
.footer-links a:hover { opacity: 1; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.hidden { display: none !important; }

/* ----------------------------------------------------
   全裝置響應式與自適應設計 (RWD System)
---------------------------------------------------- */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mobile-admin-nav-item,
.mobile-admin-icon-btn,
.mobile-toggle {
  display: none;
}

@media (max-width: 992px) {
  .hero-banner { padding: 2.5rem 1.25rem; }
  .hero-content h1 { font-size: 1.85rem; }
  .hero-stats { gap: 1.5rem; }
  .modal-card { width: 95%; max-height: 92vh; }
}

@media (max-width: 768px) {
  .navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    overflow: visible !important;
  }

  .nav-container {
    padding: 0.6rem 1rem;
    position: relative;
    overflow: visible !important;
    justify-content: space-between;
  }

  .desktop-only-admin {
    display: none !important;
  }

  .mobile-admin-icon-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: var(--radius-md);
    color: var(--primary);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
  }
  .mobile-admin-icon-btn:active {
    background: var(--primary-light);
    border-color: var(--primary);
  }

  .mobile-admin-nav-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    border: 1px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    background: var(--primary-light);
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 0.5rem;
    cursor: pointer;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1.25rem 1.5rem;
    border-bottom: 3px solid var(--primary);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
    gap: 0.75rem;
    align-items: stretch;
    z-index: 9999;
  }
  
  .nav-menu.mobile-active {
    display: flex !important;
    animation: slideDownNav 0.25s ease-out;
  }

  @keyframes slideDownNav {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-item {
    padding: 0.85rem 1rem;
    font-size: 1.05rem;
    justify-content: flex-start;
    border-radius: var(--radius-md);
    background: var(--bg-main);
  }

  .mobile-toggle {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    min-width: 48px;
    font-size: 1.6rem;
    border-radius: var(--radius-md);
    color: var(--primary);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    margin-left: auto;
    cursor: pointer;
    z-index: 1001;
  }
  .mobile-toggle:active {
    background: var(--primary-light);
  }

  .hero-search {
    position: relative;
    flex-direction: column;
    gap: 0.6rem;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }

  .hero-search input {
    width: 100%;
    background: white;
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    box-shadow: var(--shadow-md);
  }

  .hero-search .search-icon {
    position: absolute;
    top: 1rem;
    left: 0.85rem;
    z-index: 2;
  }

  .hero-search button {
    width: 100%;
    padding: 0.75rem;
    border-radius: var(--radius-md);
  }

  .quick-cards-grid, .links-grid, .pages-grid, .backup-grid {
    grid-template-columns: 1fr;
  }

  .section-header.space-between {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .admin-table {
    min-width: 620px;
  }

  .markdown-body iframe {
    height: clamp(350px, 50vh, 500px);
  }

  .toast-undo-container {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .brand-icon { width: 36px; height: 36px; }
  .site-title { font-size: 0.95rem; }
  .school-name { font-size: 0.7rem; }
  .hero-content h1 { font-size: 1.45rem; }
  .hero-content p { font-size: 0.95rem; margin-bottom: 1.25rem; }
  .hero-badges { gap: 0.4rem; }
  .hero-badge { font-size: 0.75rem; padding: 0.25rem 0.6rem; }
  .hero-stats { flex-direction: column; gap: 0.75rem; }
  .shadow-card { padding: 1.25rem; }
  .password-card { padding: 1.5rem 1rem; }
  .modal-body { padding: 1rem; }
  .modal-tabs { padding: 0 0.5rem; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tab-btn { padding: 0.75rem 0.65rem; font-size: 0.85rem; white-space: nowrap; }
}

/* 使用者登入狀態徽章與控制項 */
.user-auth-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.user-badge {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  padding: 0.3rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #334155;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

@media (max-width: 768px) {
  .user-auth-badge {
    margin-right: 0.25rem;
  }
  .user-badge span {
    max-width: 90px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}