/* === Guidelines page specific === */

:root {
  --c-red: #d33;
  --c-red-bg: #fdecec;
  --c-yellow: #b88a00;
  --c-yellow-bg: #fff7d6;
  --c-green: #2d8a3e;
  --c-green-bg: #e7f6e9;
}

/* === Scroll progress bar === */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
  width: 0;
  z-index: 100;
  transition: width 0.1s ease-out;
}

/* === Lang toggle === */
.lang-toggle {
  display: inline-flex;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.lang-toggle button {
  background: transparent;
  border: 0;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text-soft);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
.lang-toggle button.active {
  background: var(--c-primary);
  color: white;
}

/* === Language visibility === */
html[data-lang="zh"] [data-lang="en"] { display: none !important; }
html[data-lang="en"] [data-lang="zh"] { display: none !important; }
.lang-toggle button[data-lang] { display: inline-flex !important; }

/* === Hero refinement === */
.guideline-hero {
  padding: var(--space-5) 0 var(--space-4);
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-3);
  color: var(--c-text-soft);
  font-size: 0.9rem;
}
.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-weight: 500;
}

/* === Layout: sidebar + content === */
.reading-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-5);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-3) var(--space-6);
}
.toc {
  position: sticky;
  top: calc(var(--space-2) + 60px);
  align-self: start;
  font-size: 0.92rem;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  padding-right: var(--space-2);
}
.toc-title {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-soft);
  font-weight: 700;
  margin-bottom: var(--space-1);
}
.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--c-border);
}
.toc li a {
  display: block;
  padding: 6px 12px;
  color: var(--c-text-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: all 0.15s;
  line-height: 1.35;
}
.toc li a:hover {
  color: var(--c-primary);
}
.toc li a.active {
  color: var(--c-primary);
  border-left-color: var(--c-accent);
  font-weight: 600;
  background: linear-gradient(90deg, rgba(212,160,23,0.06), transparent);
}
.toc li.sub a {
  padding-left: 24px;
  font-size: 0.86rem;
}

/* === Main content === */
.reading-content {
  max-width: 760px;
  min-width: 0;
}
.reading-content h2 {
  scroll-margin-top: 80px;
  margin-top: var(--space-5);
  padding-bottom: var(--space-1);
  border-bottom: 2px solid var(--c-border);
}
.reading-content h3 {
  scroll-margin-top: 80px;
  margin-top: var(--space-4);
  color: var(--c-primary-light);
}
.reading-content p {
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: var(--space-2);
}
.reading-content ul {
  padding-left: 1.5em;
  line-height: 1.85;
}
.reading-content ul li {
  margin-bottom: 8px;
}

/* === Callout boxes === */
.callout {
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: var(--space-3) 0;
  background: var(--c-bg);
  border-left: 6px solid var(--c-accent);
}
.callout-title {
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.callout.warning { background: var(--c-yellow-bg); border-left-color: var(--c-yellow); }
.callout.warning .callout-title { color: var(--c-yellow); }
.callout.danger { background: var(--c-red-bg); border-left-color: var(--c-red); }
.callout.danger .callout-title { color: var(--c-red); }
.callout.success { background: var(--c-green-bg); border-left-color: var(--c-green); }
.callout.success .callout-title { color: var(--c-green); }

/* === Traffic Light Interactive Switcher === */
.traffic-light {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-3) 0 var(--space-4);
  box-shadow: var(--shadow);
}
.tl-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
}
.tl-tab {
  background: transparent;
  border: 0;
  padding: var(--space-3) var(--space-2);
  cursor: pointer;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
  border-bottom: 4px solid transparent;
}
.tl-tab:hover { background: rgba(0,0,0,0.03); }
.tl-tab.active.red    { color: var(--c-red);    background: var(--c-red-bg);    border-bottom-color: var(--c-red); }
.tl-tab.active.yellow { color: var(--c-yellow); background: var(--c-yellow-bg); border-bottom-color: var(--c-yellow); }
.tl-tab.active.green  { color: var(--c-green);  background: var(--c-green-bg);  border-bottom-color: var(--c-green); }
.tl-emoji {
  font-size: 1.3rem;
  display: inline-block;
  transition: transform 0.3s;
}
.tl-tab.active .tl-emoji { transform: scale(1.2); }

.tl-panel {
  padding: var(--space-3) var(--space-3) var(--space-4);
  display: none;
  animation: fadeIn 0.25s ease-out;
}
.tl-panel.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.tl-panel h4 {
  margin-top: 0;
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
}
.tl-panel.red h4    { color: var(--c-red); }
.tl-panel.yellow h4 { color: var(--c-yellow); }
.tl-panel.green h4  { color: var(--c-green); }
.tl-def {
  font-size: 1rem;
  margin-bottom: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--c-bg);
}
.tl-examples {
  padding-left: 1.5em;
  line-height: 1.8;
}
.tl-examples li { margin-bottom: 8px; }

/* === Tooltips for jargon === */
.term {
  border-bottom: 1.5px dotted var(--c-accent);
  cursor: help;
  position: relative;
  font-weight: 600;
  color: var(--c-primary-light);
}
.term:hover::after,
.term:focus::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: #222;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 400;
  white-space: normal;
  width: max-content;
  max-width: 280px;
  z-index: 50;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  line-height: 1.5;
}
.term:hover::before,
.term:focus::before {
  content: "";
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #222;
  z-index: 51;
}

/* === Collapsible details === */
details.section {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  margin-bottom: var(--space-2);
  background: var(--c-surface);
  overflow: hidden;
}
details.section[open] {
  box-shadow: var(--shadow-sm);
}
details.section > summary {
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  font-weight: 700;
  color: var(--c-primary);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
details.section > summary::-webkit-details-marker { display: none; }
details.section > summary::after {
  content: "▾";
  color: var(--c-text-soft);
  transition: transform 0.2s;
}
details.section[open] > summary::after { transform: rotate(180deg); }
details.section > summary:hover { background: var(--c-bg); }
details.section > .section-body {
  padding: 0 var(--space-3) var(--space-3);
  border-top: 1px solid var(--c-border);
  padding-top: var(--space-2);
}

/* === AI Declaration Form === */
.ai-decl-form {
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin: var(--space-3) 0;
}
.ai-decl-form h4 {
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ai-decl-form label {
  display: block;
  font-weight: 600;
  margin: var(--space-2) 0 6px;
  font-size: 0.95rem;
  color: var(--c-text);
}
.ai-decl-form input[type="text"],
.ai-decl-form textarea,
.ai-decl-form select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--c-bg);
  transition: border-color 0.15s;
}
.ai-decl-form input:focus,
.ai-decl-form textarea:focus,
.ai-decl-form select:focus {
  outline: none;
  border-color: var(--c-primary);
}
.ai-decl-form textarea { resize: vertical; min-height: 80px; }
.checkbox-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px;
  margin: 4px 0;
}
.checkbox-row label {
  font-weight: 500 !important;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 !important;
  padding: 8px 12px;
  background: var(--c-bg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}
.checkbox-row input[type="checkbox"] { margin: 0; }
.range-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.range-row input[type="range"] { flex: 1; }
.range-row output {
  font-weight: 700;
  color: var(--c-primary);
  min-width: 50px;
  text-align: right;
}
.decl-preview {
  margin-top: var(--space-3);
  background: #1f2937;
  color: #f3f4f6;
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-family: 'SF Mono', Monaco, Menlo, monospace;
  font-size: 0.88rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.decl-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
  flex-wrap: wrap;
}
.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-primary);
  color: white;
  border: 0;
  padding: 10px 18px;
  border-radius: 8px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}
.btn-copy:hover { background: var(--c-primary-light); }
.btn-copy.copied { background: var(--c-green); }

/* === Self-check checklist === */
.checklist {
  background: var(--c-surface);
  border: 2px solid var(--c-green);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) 0;
}
.checklist-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--c-primary);
  margin-bottom: var(--space-3);
}
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--space-2) 0;
  border-top: 1px solid var(--c-border);
  cursor: pointer;
  transition: opacity 0.2s;
}
.checklist-item:first-of-type { border-top: 0; }
.checklist-item input[type="checkbox"] {
  margin-top: 4px;
  width: 22px;
  height: 22px;
  cursor: pointer;
  flex-shrink: 0;
  accent-color: var(--c-green);
}
.checklist-item.done .checklist-text {
  text-decoration: line-through;
  color: var(--c-text-soft);
}
.checklist-text {
  font-size: 1rem;
  line-height: 1.65;
}
.checklist-progress {
  margin-top: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--c-bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
  color: var(--c-text-soft);
}
.checklist-progress.done {
  background: var(--c-green-bg);
  color: var(--c-green);
}
.checklist-bar {
  flex: 1;
  height: 8px;
  background: var(--c-border);
  border-radius: 999px;
  overflow: hidden;
}
.checklist-bar > div {
  height: 100%;
  background: var(--c-green);
  width: 0;
  transition: width 0.3s;
  border-radius: 999px;
}
.completion-badge {
  display: none;
  text-align: center;
  margin-top: var(--space-3);
  padding: var(--space-3);
  background: linear-gradient(135deg, #d4f0d6, #fff5cc);
  border-radius: var(--radius);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-primary);
  animation: bounceIn 0.5s ease-out;
}
.completion-badge.show { display: block; }
@keyframes bounceIn {
  0% { transform: scale(0.5); opacity: 0; }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}

/* === Mini-quiz === */
.mini-quiz {
  background: var(--c-surface);
  border: 2px solid var(--c-primary);
  border-radius: var(--radius-lg);
  margin: var(--space-3) 0;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.mini-quiz-header {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: white;
  padding: var(--space-2) var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.mini-quiz-badge {
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.98rem;
}
.mini-quiz-progress {
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.92;
  background: rgba(255,255,255,0.15);
  padding: 4px 10px;
  border-radius: 999px;
}
.mini-quiz-body {
  padding: var(--space-3);
}
.quiz-question {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--c-bg);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--c-accent);
}
.quiz-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin: var(--space-2) 0;
}
.quiz-option {
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 600;
  text-align: center;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.quiz-option:hover {
  border-color: var(--c-primary);
  background: var(--c-bg);
  transform: translateY(-1px);
}
.quiz-option:disabled {
  cursor: default;
  transform: none;
  opacity: 0.55;
}
.quiz-option.correct {
  border-color: var(--c-green);
  background: var(--c-green-bg);
  color: var(--c-green);
  opacity: 1;
}
.quiz-option.wrong {
  border-color: var(--c-red);
  background: var(--c-red-bg);
  color: var(--c-red);
  opacity: 1;
}
.quiz-emoji {
  font-size: 1.4rem;
  line-height: 1;
}
.quiz-feedback {
  display: none;
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  line-height: 1.7;
  border-left: 4px solid var(--c-text-soft);
  background: var(--c-bg);
}
.quiz-feedback.show { display: block; animation: fadeIn 0.3s ease-out; }
.quiz-feedback.correct { border-left-color: var(--c-green); background: var(--c-green-bg); }
.quiz-feedback.wrong   { border-left-color: var(--c-red);   background: var(--c-red-bg); }
.quiz-feedback strong { color: var(--c-primary); }
.quiz-actions {
  margin-top: var(--space-2);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.quiz-next-btn {
  background: var(--c-primary);
  color: white;
  border: 0;
  padding: 10px 22px;
  border-radius: 8px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  display: none;
}
.quiz-next-btn.show { display: inline-flex; align-items: center; gap: 6px; }
.quiz-next-btn:hover { background: var(--c-primary-light); }
.quiz-complete {
  display: none;
  text-align: center;
  padding: var(--space-3);
  background: linear-gradient(135deg, var(--c-accent-soft), var(--c-green-bg));
  border-radius: var(--radius);
  font-weight: 700;
  color: var(--c-primary);
  animation: bounceIn 0.5s ease-out;
}
.quiz-complete.show { display: block; }
.quiz-complete .score {
  font-size: 2.2rem;
  font-family: var(--font-en);
  color: var(--c-accent);
  margin: 6px 0;
}
.quiz-retry {
  background: transparent;
  color: var(--c-primary);
  border: 1px solid var(--c-border);
  padding: 8px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  margin-top: 10px;
}

/* === Games CTA === */
.games-cta {
  margin: var(--space-6) 0 var(--space-4);
  padding: var(--space-5);
  text-align: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  border-radius: var(--radius-lg);
  color: white;
  position: relative;
  overflow: hidden;
}
.games-cta::before {
  content: "";
  position: absolute;
  inset: -50%;
  background: radial-gradient(circle, rgba(212,160,23,0.15), transparent 60%);
  pointer-events: none;
}
.games-cta h2 {
  color: white !important;
  border: 0 !important;
  margin-top: 0;
}
.games-cta p { color: rgba(255,255,255,0.85); margin-bottom: var(--space-3); }
.games-cta .btn {
  background: var(--c-accent);
  color: var(--c-primary);
  font-size: 1.1rem;
  padding: 14px 30px;
  border-radius: 999px;
}
.games-cta .btn:hover { background: white; }

/* === Responsive === */
@media (max-width: 900px) {
  .reading-layout {
    grid-template-columns: 1fr;
    padding: 0 var(--space-2) var(--space-4);
  }
  .toc {
    position: relative;
    top: auto;
    max-height: none;
    margin-bottom: var(--space-3);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: var(--space-2);
    background: var(--c-surface);
  }
  .toc-mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    user-select: none;
  }
  .toc.collapsed ul { display: none; }
  .toc.collapsed .toc-mobile-toggle::after { transform: rotate(0deg); }
  .toc-mobile-toggle::after {
    content: "▾";
    transition: transform 0.2s;
    transform: rotate(180deg);
  }
}
@media (min-width: 901px) {
  .toc-mobile-toggle { display: none; }
}
@media (max-width: 600px) {
  .reading-content p { font-size: 0.98rem; line-height: 1.78; }
  .tl-tab { font-size: 0.92rem; padding: var(--space-2) 4px; }
  .tl-tab .tl-emoji { font-size: 1.1rem; }
}