:root {
  --primary: #00926b;
  --deep: #1f3b08;
  --leaf: #5f8144;
  --soft: #ebf2e5;
  --paper: #f9fff7;
  --accent: #e20078;
  --ink: #262626;
  --line: #d4e4c7;
  --white: #ffffff;
  --muted: #5d665c;
  --shadow: 0 16px 40px rgba(18, 31, 21, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans TC", "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: #f7f9f6;
}
button, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 380px;
}
.app.side-collapsed { grid-template-columns: 220px minmax(0, 1fr) 56px; }
.app.left-collapsed { grid-template-columns: 56px minmax(0, 1fr) 380px; }
.app.left-collapsed.side-collapsed { grid-template-columns: 56px minmax(0, 1fr) 56px; }
.chapter-rail {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: 22px 14px;
  border-right: 1px solid var(--line);
  background: #fff;
}
.app.left-collapsed .chapter-rail {
  padding: 14px 8px;
  overflow: hidden;
}
.app.left-collapsed .rail-title,
.app.left-collapsed .chapter-link {
  display: none;
}
.rail-title {
  margin: 0 0 18px;
  color: var(--deep);
  font-weight: 800;
  line-height: 1.35;
}
.rail-kicker {
  display: block;
  margin-bottom: 6px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}
.chapter-link {
  width: 100%;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  align-items: center;
  margin: 0 0 8px;
  padding: 9px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.chapter-link:hover, .chapter-link.active {
  border-color: var(--line);
  background: var(--soft);
}
.chapter-index {
  color: var(--primary);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
}
.chapter-label {
  min-width: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
  line-height: 1.35;
}
.chapter-count {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}
.main {
  min-width: 0;
  padding: 24px 28px 70px;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto;
  gap: 16px;
  align-items: center;
  margin: -24px -28px 24px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 249, 246, .96);
  backdrop-filter: blur(12px);
}
.brand-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: baseline;
}
.brand-line strong { color: var(--deep); }
.brand-line small { color: var(--muted); }
.progress {
  margin-top: 8px;
  height: 4px;
  background: #e2e8dc;
  border-radius: 999px;
  overflow: hidden;
}
.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--primary);
  transition: width .2s ease;
}
.toolbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.slide {
  max-width: 1180px;
  margin: 0 auto;
  display: none;
}
.slide.active { display: block; }
.slide-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}
.slide h1 {
  margin: 8px 0 0;
  color: var(--deep);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: 0;
}
.section-pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  color: var(--primary);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 6px;
  background: #fff;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 700;
}
.slideImage {
  margin-bottom: 18px;
}
.workshop-home {
  display: grid;
  gap: 18px;
}
.workshop-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}
.video-frame {
  aspect-ratio: 16 / 9;
  background: #101511;
}
.video-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
}
.workshop-copy {
  padding: 24px;
}
.workshop-copy h2,
.home-resource-grid h2 {
  margin: 4px 0 10px;
  color: var(--deep);
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: 0;
}
.workshop-copy h2 span {
  display: block;
}
.workshop-copy p,
.home-resource-grid p {
  margin: 0 0 12px;
  color: #344625;
  line-height: 1.75;
}
.workshop-meta {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.workshop-meta li {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid #e8eee4;
  line-height: 1.55;
}
.workshop-meta strong {
  color: var(--primary);
}
.workshop-meta span {
  min-width: 0;
  overflow-wrap: anywhere;
}
.home-resource-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}
.imagegen-card {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 28px;
  min-height: 520px;
  box-shadow: var(--shadow);
}
.final-slide-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #fff;
}
.visual-stage {
  aspect-ratio: 16/9;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  padding: 32px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 20px;
}
.visual-title h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3.2vw, 42px);
  color: var(--deep);
  letter-spacing: 0;
}
.visual-title p {
  margin: 0;
  font-size: clamp(15px, 1.8vw, 22px);
  color: #344625;
}
.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
  align-self: end;
}
.card {
  border-left: 5px solid var(--primary);
  background: rgba(255,255,255,.92);
  padding: 14px 16px;
  border-radius: 8px;
  font-weight: 700;
  color: var(--deep);
}
.build-panel {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.build-panel-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}
.build-panel h2 {
  margin: 4px 0 8px;
  color: var(--deep);
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: 0;
}
.build-panel p { margin: 0; line-height: 1.75; color: var(--muted); }
.panel-label {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
}
.build-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, .9fr);
  gap: 0;
}
.build-column {
  padding: 18px 20px;
}
.build-column + .build-column {
  border-left: 1px solid var(--line);
}
.build-column h3 {
  margin: 0 0 12px;
  color: var(--deep);
  font-size: 16px;
}
.step-list, .source-list, .check-list, .output-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.step-list li, .source-list li, .check-list li, .output-list li {
  border-top: 1px solid #e8eee4;
  padding-top: 10px;
  line-height: 1.65;
}
.step-list strong, .source-code {
  display: block;
  color: var(--primary);
  font-weight: 800;
}
.source-code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 12px;
}
.download-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px;
  padding: 18px 20px;
  border-top: 1px solid var(--line);
  background: #fbfdf9;
}
.download-card {
  display: block;
  min-height: 112px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
}
.download-card:hover { border-color: var(--primary); background: var(--soft); }
.download-card b {
  display: block;
  color: var(--deep);
  margin: 4px 0 6px;
}
.download-card span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
}
.download-card small {
  display: block;
  line-height: 1.55;
  color: var(--muted);
}
.copy-block {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}
.copy-block header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  background: var(--soft);
  color: var(--deep);
  font-weight: 700;
}
.copy-block pre {
  margin: 0;
  padding: 16px;
  overflow: auto;
  white-space: pre-wrap;
  line-height: 1.7;
  max-height: 420px;
}
.copy-btn, .nav-btn, .utility-btn, .side-toggle, .rail-toggle {
  border: 1px solid var(--primary);
  background: #fff;
  color: var(--deep);
  border-radius: 6px;
  padding: 8px 12px;
  cursor: pointer;
  text-decoration: none;
  font-weight: 700;
  line-height: 1.25;
}
.copy-btn:hover, .nav-btn:hover, .utility-btn:hover, .side-toggle:hover, .rail-toggle:hover { background: var(--soft); }
.rail-toggle-row {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}
.app.left-collapsed .rail-toggle-row {
  justify-content: center;
  margin-bottom: 0;
}
.app.left-collapsed .rail-toggle {
  width: 40px;
  min-height: 160px;
  padding: 8px 6px;
  writing-mode: vertical-rl;
}
.side {
  border-left: 1px solid var(--line);
  background: rgba(255,255,255,.96);
  padding: 18px 18px 24px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
.side.is-collapsed {
  padding: 14px 8px;
  overflow: hidden;
}
.side.is-collapsed .side-body { display: none; }
.side.is-collapsed .side-toggle {
  width: 40px;
  min-height: 160px;
  padding: 8px 6px;
  writing-mode: vertical-rl;
}
.side-toggle-row {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}
.side h2 { color: var(--deep); margin: 8px 0 14px; }
.focus {
  padding: 14px;
  background: var(--soft);
  border-radius: 8px;
  line-height: 1.7;
}
.side-note { line-height: 1.75; }
.nav-row {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.fullscreen-controls {
  display: none;
}
.fullscreen-btn {
  border: 1px solid rgba(255,255,255,.7);
  background: rgba(255,255,255,.92);
  color: var(--deep);
  border-radius: 6px;
  padding: 9px 13px;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(0,0,0,.14);
}
.fullscreen-btn:hover { background: #fff; }
.notes { margin-top: 20px; }
.notes textarea {
  width: 100%;
  min-height: 130px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  resize: vertical;
}
.qr-card {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 28px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
#qrcode {
  width: 240px;
  height: 240px;
  padding: 10px;
  border: 1px solid var(--line);
}
.url-line {
  word-break: break-all;
  font-family: ui-monospace, Consolas, monospace;
  color: var(--deep);
}
.main:fullscreen,
.main.is-playing {
  width: 100vw;
  height: 100vh;
  padding: 0;
  overflow: hidden;
  background: #101511;
}
.main.is-playing {
  position: fixed;
  inset: 0;
  z-index: 2000;
}
body.is-playing {
  overflow: hidden;
}
body.is-playing .chapter-rail,
body.is-playing .side {
  display: none;
}
.main:fullscreen .topbar,
.main:fullscreen .nav-row,
.main:fullscreen .progress,
.main:fullscreen .slide-head,
.main:fullscreen .build-panel,
.main:fullscreen .promptList,
.main.is-playing .topbar,
.main.is-playing .nav-row,
.main.is-playing .progress,
.main.is-playing .slide-head,
.main.is-playing .build-panel,
.main.is-playing .promptList {
  display: none;
}
.main:fullscreen .fullscreen-controls,
.main.is-playing .fullscreen-controls {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  max-width: calc(100vw - 16px);
  padding: 7px;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 10px;
  background: rgba(16, 21, 17, .58);
  backdrop-filter: blur(10px);
}
.main:fullscreen .slide,
.main.is-playing .slide {
  width: 100vw;
  height: 100vh;
  max-width: none;
  margin: 0;
  padding: 0;
}
.main:fullscreen .slide.active,
.main.is-playing .slide.active {
  display: flex;
  align-items: center;
  justify-content: center;
}
.main:fullscreen .slideImage,
.main.is-playing .slideImage {
  margin: 0;
}
.main:fullscreen .final-slide-image,
.main.is-playing .final-slide-image {
  width: auto;
  height: auto;
  max-width: 100vw;
  max-height: 100vh;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  object-fit: contain;
}
.main:fullscreen .qr-card,
.main:fullscreen .workshop-home,
.main:fullscreen .imagegen-card,
.main.is-playing .qr-card,
.main.is-playing .workshop-home,
.main.is-playing .imagegen-card {
  width: min(1180px, 96vw);
  max-height: 94vh;
  overflow: auto;
  box-shadow: none;
}
@media (max-width: 1180px) {
  .app, .app.side-collapsed { grid-template-columns: 180px minmax(0, 1fr); }
  .app.left-collapsed,
  .app.left-collapsed.side-collapsed { grid-template-columns: 56px minmax(0, 1fr); }
  .side { grid-column: 1 / -1; position: static; height: auto; border-left: 0; border-top: 1px solid var(--line); }
  .side.is-collapsed .side-body { display: none; }
  .side.is-collapsed .side-toggle { writing-mode: horizontal-tb; width: auto; min-height: 0; }
}
@media (max-width: 820px) {
  .app, .app.side-collapsed, .app.left-collapsed, .app.left-collapsed.side-collapsed { display: block; }
  .chapter-rail {
    position: sticky;
    top: 0;
    height: auto;
    z-index: 20;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 10px 12px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .rail-toggle-row {
    flex: 0 0 auto;
    margin-bottom: 0;
  }
  .rail-toggle {
    white-space: nowrap;
  }
  .app.left-collapsed .chapter-rail {
    display: flex;
    width: 100%;
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
  }
  .app.left-collapsed .rail-toggle {
    width: auto;
    min-height: 0;
    writing-mode: horizontal-tb;
  }
  .rail-title { display: none; }
  .chapter-link {
    width: auto;
    min-width: 116px;
    grid-template-columns: 1fr;
    margin: 0;
  }
  .chapter-index, .chapter-count { display: none; }
  .main { padding: 16px 12px 36px; }
  .topbar {
    position: static;
    grid-template-columns: 1fr;
    margin: -16px -12px 16px;
    padding: 12px;
  }
  .toolbar-actions { justify-content: flex-start; }
  .slide-head { grid-template-columns: 1fr; }
  .build-panel-head, .build-grid { grid-template-columns: 1fr; }
  .build-column + .build-column { border-left: 0; border-top: 1px solid var(--line); }
  .workshop-hero, .home-resource-grid { grid-template-columns: 1fr; }
  .workshop-copy, .home-resource-grid { padding: 18px; }
  .qr-card { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
}