/* ========================================
   林業政策與法規知識網 - 主樣式
   版本:v1.0 · 2026-04-11
   ======================================== */

:root {
  /* 色彩系統 - 森林主題 */
  --forest-dark: #1b4332;
  --forest-main: #2d6a4f;
  --forest-mid: #52b788;
  --forest-light: #b7e4c7;
  --forest-bg: #f5f9f6;

  /* 黑板風(給簡報用) */
  --blackboard-bg: #1e3a2f;
  --chalk-white: #f4f1de;
  --chalk-yellow: #e9c46a;

  /* 中性色 */
  --text-main: #1a1a1a;
  --text-muted: #5a5a5a;
  --border: #d0d6d3;
  --card-bg: #ffffff;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);

  /* 功能色 */
  --accent: #d97706;
  --danger: #dc2626;
  --success: #16a34a;
  --info: #2563eb;

  /* 版面 */
  --sidebar-width: 240px;
  --right-width: 280px;
  --topbar-height: 60px;
  --footer-height: 50px;
}

/* ========== 全域重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--forest-bg);
  scroll-behavior: smooth;
}

a {
  color: var(--forest-main);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--forest-dark);
  text-decoration: underline;
}

/* ========== 頂部導覽列 ========== */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  background: linear-gradient(135deg, var(--forest-main) 0%, var(--forest-dark) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.topbar-left {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-title {
  font-size: 20px;
  font-weight: 700;
  color: white;
}

.site-subtitle {
  font-size: 11px;
  color: var(--forest-light);
  margin-top: 2px;
}

.home-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.15);
  color: #ffffff;
  border: 1px solid rgba(233,196,106,0.4);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.home-btn:hover {
  background: rgba(233,196,106,0.25);
  border-color: #e9c46a;
  color: #fff;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mode-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.15);
  padding: 4px 8px;
  border-radius: 20px;
}

.mode-label {
  font-size: 12px;
  color: var(--forest-light);
  margin-right: 4px;
}

.mode-btn {
  background: transparent;
  color: white;
  border: 1px solid transparent;
  padding: 4px 10px;
  border-radius: 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.mode-btn.active {
  background: var(--chalk-white);
  color: var(--forest-dark);
  font-weight: 700;
}

.pen-toggle {
  background: var(--accent);
  color: white;
  border: none;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s;
}

.pen-toggle:hover {
  transform: translateY(-1px);
}

/* ========== 三欄版面 ========== */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--right-width);
  margin-top: var(--topbar-height);
  min-height: calc(100vh - var(--topbar-height) - var(--footer-height));
}

/* ========== 左側:單元導覽 ========== */
.sidebar-left {
  background: white;
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  position: sticky;
  top: var(--topbar-height);
  height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
}

.sidebar-left h2 {
  font-size: 15px;
  color: var(--forest-dark);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--forest-light);
}

.unit-list {
  list-style: none;
}

.unit-link {
  display: block;
  padding: 10px 12px;
  margin-bottom: 4px;
  border-radius: 6px;
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.4;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.unit-link:hover {
  background: var(--forest-light);
  color: var(--forest-dark);
  border-left-color: var(--forest-main);
  text-decoration: none;
}

.unit-link.active {
  background: var(--forest-main);
  color: white;
  border-left-color: var(--chalk-yellow);
  font-weight: 600;
}

.unit-link span {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}

.unit-link.active span {
  color: var(--forest-light);
}

.sidebar-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.resource-link {
  display: block;
  font-size: 13px;
  padding: 6px 0;
  color: var(--text-muted);
}

/* ========== 中間:主要內容 ========== */
.content {
  padding: 30px 40px;
  max-width: 100%;
  overflow-x: hidden;
}

.hero h2 {
  font-size: 28px;
  color: var(--forest-dark);
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 30px;
  max-width: 800px;
}

.hero-desc strong {
  color: var(--forest-main);
}

/* 單元卡片網格 */
.course-overview h3 {
  font-size: 20px;
  color: var(--forest-dark);
  margin-bottom: 16px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--forest-light);
}

.unit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}

.unit-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  text-decoration: none;
  color: var(--text-main);
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.unit-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--forest-main);
}

.unit-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(45, 106, 79, 0.2);
  text-decoration: none;
}

.unit-num {
  font-size: 38px;
  font-weight: 900;
  color: var(--forest-light);
  line-height: 1;
}

.unit-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--forest-dark);
  margin-top: 4px;
}

.unit-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.5;
}

/* 特色功能 */
.features h3 {
  font-size: 20px;
  color: var(--forest-dark);
  margin-bottom: 16px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--forest-light);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 30px;
}

.feature-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
  border: 1px solid var(--border);
}

.feat-icon {
  font-size: 32px;
  margin-bottom: 6px;
}

.feature-card h4 {
  font-size: 14px;
  color: var(--forest-dark);
  margin-bottom: 4px;
}

.feature-card p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Credits 區塊 */
.credits {
  background: white;
  border-radius: 10px;
  padding: 20px 24px;
  margin-top: 20px;
  border-left: 4px solid var(--forest-main);
}

.credits h3 {
  color: var(--forest-dark);
  margin-bottom: 12px;
}

.credits ul {
  list-style: none;
  margin-bottom: 12px;
}

.credits li {
  padding: 4px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.credits strong {
  color: var(--text-main);
}

.disclaimer {
  font-size: 12px;
  color: var(--danger);
  padding: 8px 12px;
  background: #fef2f2;
  border-radius: 6px;
  border-left: 3px solid var(--danger);
}

/* ========== 右側:工具面板 ========== */
.sidebar-right {
  background: white;
  border-left: 1px solid var(--border);
  padding: 20px 16px;
  position: sticky;
  top: var(--topbar-height);
  height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
}

.tool-panel h3 {
  font-size: 15px;
  color: var(--forest-dark);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--forest-light);
}

.tool-section {
  margin-bottom: 20px;
}

.tool-section h4 {
  font-size: 13px;
  color: var(--text-main);
  margin-bottom: 8px;
}

#search-box,
#user-notes {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 13px;
  background: #fafafa;
}

#search-box:focus,
#user-notes:focus {
  outline: none;
  border-color: var(--forest-main);
  background: white;
}

#user-notes {
  resize: vertical;
  min-height: 120px;
}

#search-results {
  list-style: none;
  margin-top: 8px;
}

#search-results li {
  padding: 6px;
  font-size: 12px;
  border-bottom: 1px dashed var(--border);
}

.btn-small {
  background: var(--forest-main);
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  margin-top: 6px;
}

.btn-small:hover {
  background: var(--forest-dark);
}

.progress-display {
  font-size: 12px;
}

.progress-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
}

.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 4px;
}

.progress-fill {
  height: 100%;
  background: var(--forest-main);
  transition: width 0.3s;
}

/* ========== 教師模式 ========== */
body[data-mode="teacher"] .teacher-only {
  display: block;
}

body[data-mode="student"] .teacher-only {
  display: none;
}

.teacher-only {
  background: #fef3c7;
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 4px;
}

.teacher-only::before {
  content: "👨‍🏫 教師備註:";
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}

/* ---------- 後臺管理元件(僅教師可見/可用)---------- */
/* .teacher-edit: 只有教師模式才顯示的「編輯/上傳/管理」元件 */
body[data-mode="student"] .teacher-edit,
body[data-mode="student"] .teacher-edit-inline {
  display: none !important;
}
body[data-mode="teacher"] .teacher-edit {
  display: block;
}
body[data-mode="teacher"] .teacher-edit-inline {
  display: inline-flex;
}

/* .student-note: 學生模式下顯示,教師模式下隱藏(例如「請切換至教師模式」提示)*/
body[data-mode="teacher"] .student-note {
  display: none;
}
body[data-mode="student"] .student-note {
  display: block;
}

/* 教師後臺卡片外框 */
.teacher-edit {
  background: linear-gradient(135deg, rgba(233, 196, 106, 0.12), rgba(30, 58, 47, 0.05));
  border: 1px dashed #d4a841;
  border-radius: 10px;
  padding: 16px 18px;
  margin: 14px 0;
  position: relative;
}
.teacher-edit::before {
  content: "🛠️ 教師後臺管理";
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: #8a5a10;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

/* 學生提示訊息 */
.student-note {
  background: #e8f5e9;
  border-left: 4px solid #2d6a4f;
  padding: 10px 14px;
  color: #1e3a2f;
  font-size: 14px;
  border-radius: 4px;
  margin: 12px 0;
}
.student-note::before {
  content: "👩‍🎓 學生檢視模式:";
  font-weight: 700;
  color: #2d6a4f;
  margin-right: 6px;
}

/* 學生模式下,disable 所有可編輯控制項(保險措施)*/
body[data-mode="student"] input[type="text"].teacher-input,
body[data-mode="student"] textarea.teacher-input,
body[data-mode="student"] button.teacher-btn {
  pointer-events: none;
  opacity: 0.5;
  cursor: not-allowed;
}

/* 教師模式徽章(右下角浮動提示)*/
body[data-mode="teacher"]::after {
  content: "🛠️ 教師模式";
  position: fixed;
  right: 14px;
  bottom: 14px;
  background: #e9c46a;
  color: #1e3a2f;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  pointer-events: none;
}
body[data-mode="student"]::after {
  content: "👩‍🎓 學生檢視模式";
  position: fixed;
  right: 14px;
  bottom: 14px;
  background: rgba(45, 106, 79, 0.9);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  pointer-events: none;
}

/* ========== 單元頁面共用樣式 ========== */
.unit-header {
  background: linear-gradient(135deg, var(--forest-main) 0%, var(--forest-dark) 100%);
  color: white;
  padding: 30px 40px;
  margin: -30px -40px 30px -40px;
  border-radius: 0 0 12px 12px;
}

.unit-header h1 {
  font-size: 28px;
  margin-bottom: 8px;
}

.unit-header .unit-subtitle {
  font-size: 15px;
  color: var(--forest-light);
}

/* 內容分頁標籤 */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
  gap: 2px;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}

.tab-btn:hover {
  color: var(--forest-main);
}

.tab-btn.active {
  color: var(--forest-dark);
  border-bottom-color: var(--forest-main);
}

.tab-content {
  display: none;
  padding: 20px 0;
}

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

/* 內容文字 */
.lecture-body h1,
.lecture-body h2,
.lecture-body h3,
.lecture-body h4 {
  color: var(--forest-dark);
  margin: 20px 0 12px 0;
}

.lecture-body h2 {
  font-size: 22px;
  border-bottom: 2px solid var(--forest-light);
  padding-bottom: 4px;
}

.lecture-body h3 {
  font-size: 18px;
}

.lecture-body h4 {
  font-size: 15px;
}

.lecture-body p {
  margin: 12px 0;
}

.lecture-body ul,
.lecture-body ol {
  padding-left: 24px;
  margin: 12px 0;
}

.lecture-body li {
  margin: 6px 0;
}

.lecture-body strong {
  color: var(--forest-dark);
}

.lecture-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 14px;
  background: white;
}

.lecture-body th {
  background: var(--forest-main);
  color: white;
  padding: 10px;
  text-align: left;
  border: 1px solid var(--forest-dark);
}

.lecture-body td {
  padding: 8px 10px;
  border: 1px solid var(--border);
}

.lecture-body tr:nth-child(even) td {
  background: var(--forest-bg);
}

/* YouTube 影片嵌入區 */
.video-section {
  background: white;
  border-radius: 10px;
  padding: 20px;
  margin: 20px 0;
  border: 1px solid var(--border);
}

.video-section h3 {
  color: var(--forest-dark);
  margin-bottom: 12px;
}

.video-placeholder {
  aspect-ratio: 16 / 9;
  background: #2a2a2a;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 16px;
  position: relative;
  border: 2px dashed #444;
}

.video-placeholder::before {
  content: "📺";
  font-size: 64px;
  margin-right: 12px;
}

.video-iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: 6px;
}

.video-list {
  margin-top: 12px;
}

.video-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  background: #fafafa;
  border-radius: 6px;
  margin-bottom: 6px;
  font-size: 13px;
}

.video-item input {
  flex: 1;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* 簡報區 */
.slide-section {
  background: white;
  border-radius: 10px;
  padding: 20px;
  margin: 20px 0;
  border: 1px solid var(--border);
}

.slide-section h3 {
  color: var(--forest-dark);
  margin-bottom: 12px;
}

.slide-status {
  padding: 12px 16px;
  background: #fef3c7;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  border: 2px dashed var(--accent);
}

/* 簡報已就緒狀態 */
.slide-status.slide-ready {
  background: #e7f5ea;
  color: var(--forest-dark);
  border: 2px solid var(--forest-main);
  font-weight: 600;
}

/* 簡報下載卡片 */
.slide-card {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
  padding: 18px 20px;
  background: linear-gradient(135deg, #1e3a2f 0%, #2d6a4f 100%);
  color: #f4f1de;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.slide-card-icon {
  font-size: 42px;
  line-height: 1;
  flex-shrink: 0;
}

.slide-card-info {
  flex: 1;
  min-width: 0;
}

.slide-card-title {
  font-size: 16px;
  font-weight: 700;
  color: #f4f1de;
  margin-bottom: 4px;
}

.slide-card-meta {
  font-size: 12px;
  color: #e9c46a;
  opacity: 0.9;
}

.slide-download-btn {
  flex-shrink: 0;
  background: #e9c46a !important;
  color: #1e3a2f !important;
  border: none !important;
  font-weight: 700 !important;
  text-decoration: none !important;
  padding: 10px 20px !important;
  border-radius: 6px !important;
  transition: transform 0.15s, box-shadow 0.15s;
}

.slide-download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.slide-tip {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 8px 12px;
  background: #f8f9f6;
  border-left: 3px solid var(--forest-main);
  border-radius: 4px;
}

@media (max-width: 600px) {
  .slide-card {
    flex-direction: column;
    text-align: center;
  }
}

/* ================================================================
 * 內嵌 PDF 簡報播放器(PDF.js)
 * ================================================================ */
.slide-viewer {
  margin-top: 20px;
  background: #0f2118;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
  position: relative;
}

.slide-viewer-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1e3a2f;
  border-radius: 8px;
  padding: 0;
  overflow: hidden;
}

#slide-canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: 4px;
  background: #1e3a2f;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.slide-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #e9c46a;
  font-size: 15px;
  text-align: center;
  padding: 20px;
  background: rgba(30, 58, 47, 0.85);
  border-radius: 8px;
  border: 1px dashed #e9c46a;
}

.slide-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 14px;
  background: #1e3a2f;
  border-radius: 8px;
  color: #f4f1de;
  flex-wrap: wrap;
}

.slide-toolbar-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.slide-nav-btn {
  background: #e9c46a;
  color: #1e3a2f;
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.15s, opacity 0.15s;
  font-family: inherit;
}

.slide-nav-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.25);
}

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

.slide-nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.slide-nav-btn.icon-only {
  padding: 8px 10px;
  font-size: 13px;
}

.slide-pager {
  font-size: 15px;
  font-weight: 700;
  color: #f4f1de;
  letter-spacing: 1px;
  min-width: 80px;
  text-align: center;
}

.slide-pager #slide-page-cur {
  color: #e9c46a;
  font-size: 18px;
}

.slide-shortcut-hint {
  font-size: 11px;
  color: #9ab0a1;
  text-align: center;
  margin-top: 8px;
  letter-spacing: 0.5px;
}

.slide-shortcut-hint kbd {
  background: #2d6a4f;
  color: #f4f1de;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
  border: 1px solid #3d7a5f;
  margin: 0 2px;
}

@media (max-width: 600px) {
  .slide-toolbar {
    flex-direction: column;
  }
}

/* 題庫區 */
.quiz-section {
  background: white;
  border-radius: 10px;
  padding: 20px;
  margin: 20px 0;
  border: 1px solid var(--border);
}

.quiz-section h3 {
  color: var(--forest-dark);
  margin-bottom: 16px;
}

.question {
  background: var(--forest-bg);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 16px;
  border-left: 4px solid var(--forest-main);
}

.question-text {
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-main);
}

.question-options {
  list-style: none;
  padding: 0;
}

.question-options li {
  padding: 8px 12px;
  margin: 4px 0;
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 14px;
}

.question-options li:hover {
  background: var(--forest-light);
  border-color: var(--forest-main);
}

.question-options li.selected {
  background: var(--info);
  color: white;
  border-color: var(--info);
}

.question-options li.correct {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

.question-options li.wrong {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

.question-explain {
  margin-top: 12px;
  padding: 12px;
  background: #e0f2fe;
  border-left: 3px solid var(--info);
  font-size: 13px;
  color: var(--text-main);
  border-radius: 4px;
  display: none;
}

.question.answered .question-explain {
  display: block;
}

.essay-question {
  background: #fef3c7;
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 16px;
  border-left: 4px solid var(--accent);
}

.essay-points {
  margin-top: 10px;
  padding: 12px;
  background: white;
  border-radius: 4px;
  font-size: 13px;
}

.essay-points ul {
  padding-left: 20px;
}

body[data-mode="student"] .essay-points {
  display: none;
}

/* ---- Firebase 動態注入的申論參考要點(僅授權教師可取得內容)---- */
/* 不綁 data-mode:此區塊只有在 Firebase 驗證為授權教師時才會被 JS 填入 */
.fl-essay-slot:empty { display: none; }
.fl-essay-points {
  margin-top: 10px;
  padding: 12px 14px;
  background: linear-gradient(135deg, rgba(233, 196, 106, 0.14), rgba(30, 58, 47, 0.05));
  border: 1px dashed #d4a841;
  border-radius: 6px;
  font-size: 13px;
  color: #1e3a2f;
}
.fl-essay-points ul { padding-left: 20px; margin: 8px 0 0; }
.fl-essay-points .fl-essay-h {
  margin: 6px 0; font-weight: 600; color: #8a5a10;
}

.quiz-summary {
  background: var(--forest-light);
  padding: 16px 20px;
  border-radius: 8px;
  margin-top: 20px;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--forest-dark);
}

/* ========== Footer ========== */
.footer {
  background: var(--forest-dark);
  color: var(--forest-light);
  text-align: center;
  padding: 14px 20px;
  font-size: 12px;
  line-height: 1.6;
}

/* ========== RWD ========== */
@media (max-width: 1100px) {
  .layout {
    grid-template-columns: var(--sidebar-width) 1fr;
  }
  .sidebar-right {
    display: none;
  }
}

@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar-left {
    display: none;
  }
  .content {
    padding: 20px;
  }
  .site-subtitle {
    display: none;
  }
}

/* ================================================================
 * 筆記儲存對話框(notes.js 使用)
 * ================================================================ */
.notes-save-dialog {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99999;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
.notes-save-dialog[data-open="1"] {
  display: block;
}
.notes-save-dialog .nsd-mask {
  position: absolute;
  inset: 0;
  background: rgba(20, 30, 25, 0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.notes-save-dialog .nsd-box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  width: min(92vw, 480px);
  padding: 26px 30px 22px;
  border-top: 6px solid #1e3a2f;
  animation: nsd-pop 0.18s ease-out;
}
@keyframes nsd-pop {
  from { opacity: 0; transform: translate(-50%, -46%) scale(0.96); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
.notes-save-dialog .nsd-title {
  font-size: 19px;
  font-weight: 700;
  color: #1e3a2f;
  margin-bottom: 6px;
}
.notes-save-dialog .nsd-desc {
  font-size: 13px;
  color: #5a6a60;
  margin-bottom: 18px;
  line-height: 1.6;
}
.notes-save-dialog .nsd-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}
.notes-save-dialog .nsd-opt {
  display: grid;
  grid-template-columns: 20px 1fr;
  grid-template-rows: auto auto;
  column-gap: 10px;
  row-gap: 2px;
  align-items: center;
  padding: 10px 14px;
  border: 2px solid #e0e0d6;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  background: #faf8f0;
}
.notes-save-dialog .nsd-opt:hover {
  border-color: #e9c46a;
  background: #fff7dc;
}
.notes-save-dialog .nsd-opt input[type="radio"] {
  grid-row: 1 / span 2;
  grid-column: 1;
  width: 16px;
  height: 16px;
  accent-color: #2d6a4f;
  cursor: pointer;
}
.notes-save-dialog .nsd-opt input[type="radio"]:checked ~ .nsd-opt-title {
  color: #1e3a2f;
}
.notes-save-dialog .nsd-opt:has(input:checked) {
  border-color: #2d6a4f;
  background: #eaf5ee;
}
.notes-save-dialog .nsd-opt-title {
  grid-row: 1;
  grid-column: 2;
  font-weight: 700;
  font-size: 14px;
  color: #1e3a2f;
}
.notes-save-dialog .nsd-opt-hint {
  grid-row: 2;
  grid-column: 2;
  font-size: 12px;
  color: #6a7a70;
}
.notes-save-dialog .nsd-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}
.notes-save-dialog .nsd-btn {
  padding: 9px 18px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid transparent;
  font-family: inherit;
  transition: all 0.15s ease;
}
.notes-save-dialog .nsd-btn-cancel {
  background: transparent;
  color: #5a6a60;
  border-color: #c8d0c0;
}
.notes-save-dialog .nsd-btn-cancel:hover {
  background: #f0f0e8;
}
.notes-save-dialog .nsd-btn-save {
  background: #2d6a4f;
  color: #f4f1de;
  border-color: #2d6a4f;
}
.notes-save-dialog .nsd-btn-save:hover:not(:disabled) {
  background: #3a8761;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(45, 106, 79, 0.3);
}
.notes-save-dialog .nsd-btn-save:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.notes-save-dialog .nsd-status {
  margin-top: 12px;
  font-size: 12.5px;
  color: #5a6a60;
  min-height: 18px;
  text-align: center;
  line-height: 1.5;
}
@media (max-width: 600px) {
  .notes-save-dialog .nsd-box {
    padding: 22px 20px 18px;
  }
  .notes-save-dialog .nsd-title { font-size: 17px; }
}