/* components.css — All component styles for Kroll Québec Study Guide */

/* ========================================
   HEADER / NAVIGATION
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}
.header--scrolled { box-shadow: var(--shadow-sm); }

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-left { flex-shrink: 0; }
.logo { text-decoration: none; color: inherit; display: flex; align-items: center; }
.logo svg { display: block; }

.header-nav {
  flex: 1;
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.header-nav::-webkit-scrollbar { display: none; }

.nav-link {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) 6px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: all var(--transition-interactive);
}
.nav-link:hover { color: var(--color-text); background: var(--color-surface-2); }
.nav-link.active { color: var(--color-primary); }

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.lang-btn {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
  min-width: 36px;
  text-align: center;
}
.lang-btn:hover { color: var(--color-text); }
.lang-btn.active { background: var(--color-primary); color: var(--color-text-inverse); }

/* Theme button */
.theme-btn {
  padding: var(--space-1);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-btn:hover { color: var(--color-text); background: var(--color-surface-2); }

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  padding: var(--space-1);
  color: var(--color-text-muted);
}
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: var(--space-2) var(--space-6) var(--space-4);
  border-top: 1px solid var(--color-divider);
}
.mobile-nav.open { display: flex; }
.mobile-nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  transition: color var(--transition-interactive);
}
.mobile-nav-link:hover { color: var(--color-text); }

@media (max-width: 900px) {
  .header-nav { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: clamp(var(--space-10), 6vw, var(--space-20)) 0;
}
.section-alt {
  background: var(--color-surface);
}
.container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-header {
  margin-bottom: var(--space-8);
}
.section-number {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  letter-spacing: 0.05em;
}
.section-header h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.section-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ========================================
   HERO
   ======================================== */
.section-hero {
  padding: clamp(var(--space-16), 10vw, var(--space-24)) 0 clamp(var(--space-10), 6vw, var(--space-16));
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}
.hero-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  max-width: 18ch;
  margin: 0 auto var(--space-4);
  line-height: 1.1;
}
.hero-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}
.hero-highlight {
  font-size: var(--text-lg);
  font-weight: 700;
  color: #d4af37;
}

/* Stats bar */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.stat-item { text-align: center; }
.stat-number {
  display: block;
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}
.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-divider);
}

/* Disclaimer */
.disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 50ch;
  margin: 0 auto;
  line-height: 1.5;
}

/* ========================================
   ACCORDION (Québec Framework)
   ======================================== */
.accordion-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.accordion-item {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive);
}
.accordion-item:hover { box-shadow: var(--shadow-sm); }
.accordion-item.open { border-color: var(--color-primary); }

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-interactive);
}
.accordion-trigger:hover { background: var(--color-surface); }

.accordion-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  flex-shrink: 0;
}

.accordion-title {
  flex: 1;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.accordion-chevron {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.accordion-item.open .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 0 var(--space-6);
}
.accordion-panel[hidden] { display: block; max-height: 0; padding-top: 0; padding-bottom: 0; }
.accordion-item.open .accordion-panel {
  max-height: 1200px;
  padding-top: 0;
  padding-bottom: var(--space-6);
}
.accordion-panel p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  padding-left: calc(40px + var(--space-4));
}

/* ========================================
   CONTENT GRID & CARDS
   ======================================== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.content-grid.cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.content-card {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive);
}
.content-card:hover { box-shadow: var(--shadow-sm); }
.content-card h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.content-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

/* ========================================
   TWO-COLUMN LAYOUT
   ======================================== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-8);
  align-items: start;
}
.col-content h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  margin-top: var(--space-5);
  color: var(--color-text);
}
.col-content h3:first-child { margin-top: 0; }
.col-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (max-width: 768px) {
  .two-col { grid-template-columns: 1fr; }
}

/* Queue list */
.queue-list {
  list-style: none;
  padding: 0;
  margin-top: var(--space-3);
}
.queue-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  gap: var(--space-2);
}
.queue-list li strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Info box (sidebar) */
.info-box {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border-left: 3px solid var(--color-primary);
}
.section-alt .info-box {
  background: var(--color-surface-2);
}
.info-box h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.info-box p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Shortcut list */
.shortcut-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.shortcut {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.shortcut kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
}

/* Check list */
.check-list {
  list-style: none;
  padding: 0;
  margin-top: var(--space-3);
}
.check-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  position: relative;
  line-height: 1.55;
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: calc(var(--space-2) + 6px);
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-primary);
  border-radius: 3px;
  opacity: 0.5;
}

/* ========================================
   WORKFLOW STEPS
   ======================================== */
.workflow-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.workflow-step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-interactive);
}
.section-alt .workflow-step {
  background: var(--color-surface-2);
}
.workflow-step:hover { box-shadow: var(--shadow-sm); }
.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
}
.step-content h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--color-text);
}
.step-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   BILLING HIGHLIGHT
   ======================================== */
.billing-highlight {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border-top: 3px solid var(--color-primary);
}
.billing-highlight h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}
.param-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.param-card {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.param-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-1);
}
.param-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}
.param-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
}

/* ========================================
   COLLAPSIBLE SECTIONS (Flashcards / Quizzes)
   ======================================== */
.collapsible-section {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive);
}
.section-alt .collapsible-section {
  background: var(--color-surface-2);
}
.collapsible-section:hover { box-shadow: var(--shadow-sm); }
.collapsible-section.open { border-color: var(--color-primary); }

.collapsible-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-8);
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-interactive);
}
.collapsible-trigger:hover { background: var(--color-surface); }
.section-alt .collapsible-trigger:hover { background: var(--color-surface); }

.collapsible-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.collapsible-left .section-number {
  font-size: var(--text-lg);
  margin-bottom: 0;
}
.collapsible-left h2 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.collapsible-left .section-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin: 0;
  max-width: none;
}

.collapsible-chevron {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.collapsible-section.open .collapsible-chevron {
  transform: rotate(180deg);
}

.collapsible-body {
  display: none;
  padding: 0 var(--space-8) var(--space-8);
}
.collapsible-section.open .collapsible-body {
  display: block;
}

@media (max-width: 640px) {
  .collapsible-trigger { padding: var(--space-4) var(--space-5); }
  .collapsible-body { padding: 0 var(--space-5) var(--space-5); }
  .collapsible-left .section-number { display: none; }
}

/* ========================================
   FLASHCARDS
   ======================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}
.filter-btn {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: transparent;
  transition: all var(--transition-interactive);
}
.filter-btn:hover { color: var(--color-text); border-color: var(--color-border); }
.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.flashcard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.flashcard {
  perspective: 600px;
  cursor: pointer;
  min-height: 180px;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 180px;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}
.flashcard-front, .flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.55;
  text-align: center;
}
.flashcard-front {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  color: var(--color-text);
  font-weight: 500;
}
.flashcard-back {
  background: var(--color-primary-highlight);
  border: 1px solid var(--color-primary);
  color: var(--color-text);
  transform: rotateY(180deg);
}
.flashcard-section-tag {
  position: absolute;
  top: var(--space-2);
  left: var(--space-3);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ========================================
   QUIZZES
   ======================================== */
.quiz-question {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}
.section-alt .quiz-question {
  background: var(--color-surface-2);
}
.quiz-q-text {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}
.quiz-q-num {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-interactive);
  text-align: left;
  width: 100%;
  background: transparent;
}
.quiz-option:hover { border-color: var(--color-border); color: var(--color-text); background: var(--color-surface); }
.section-alt .quiz-option:hover { background: var(--color-surface); }
.quiz-option.selected { border-color: var(--color-primary); color: var(--color-text); background: var(--color-primary-highlight); }
.quiz-option.correct { border-color: var(--color-success); color: var(--color-success); background: var(--color-success-highlight); }
.quiz-option.incorrect { border-color: var(--color-error); color: var(--color-error); background: var(--color-error-highlight); }
.quiz-option.show-correct { border-color: var(--color-success); color: var(--color-success); background: var(--color-success-highlight); }

.quiz-option-letter {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
}
.quiz-option.selected .quiz-option-letter { background: var(--color-primary); color: var(--color-text-inverse); }
.quiz-option.correct .quiz-option-letter { background: var(--color-success); color: #fff; }
.quiz-option.incorrect .quiz-option-letter { background: var(--color-error); color: #fff; }

.quiz-submit-row {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.btn-quiz {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  transition: all var(--transition-interactive);
}
.btn-quiz-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-quiz-primary:hover { background: var(--color-primary-hover); }
.btn-quiz-secondary {
  background: transparent;
  border: 1px solid var(--color-divider);
  color: var(--color-text-muted);
}
.btn-quiz-secondary:hover { color: var(--color-text); border-color: var(--color-border); }

.quiz-results {
  text-align: center;
  padding: var(--space-8);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
}
.section-alt .quiz-results { background: var(--color-surface-2); }
.quiz-score {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.quiz-score-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* ========================================
   RESOURCES
   ======================================== */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-3);
}
.resource-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  transition: all var(--transition-interactive);
}
.resource-link:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.resource-link svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

/* ========================================
   MANUAL IMAGES
   ======================================== */
.manual-img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  margin-top: var(--space-4);
  margin-left: auto;
  margin-right: auto;
}
.accordion-panel .manual-img {
  margin-left: calc(40px + var(--space-4));
  max-width: calc(100% - 40px - var(--space-4));
}
.manual-img-wide {
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-sm);
}

/* Manual image gallery inside collapsible sections */
.manual-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.manual-gallery .manual-img {
  margin: 0;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.manual-gallery .manual-img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}
.manual-gallery-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-1);
  font-weight: 500;
}
.manual-gallery-item {
  display: flex;
  flex-direction: column;
}
@media (max-width: 640px) {
  .manual-gallery {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   INNER ACCORDION (sub-task items)
   ======================================== */
.inner-accordion-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.inner-accordion-item {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.section-alt .inner-accordion-item {
  background: var(--color-surface-2);
}
.inner-accordion-item:hover {
  box-shadow: var(--shadow-sm);
}
.inner-accordion-item.inner-open {
  border-color: var(--color-primary);
}

.inner-accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-interactive);
}
.inner-accordion-trigger:hover {
  background: var(--color-surface);
}
.section-alt .inner-accordion-trigger:hover {
  background: var(--color-surface);
}

/* Step number badge for workflow items */
.inner-step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
}

/* Icon badge for non-step items */
.inner-icon-badge {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  color: var(--color-primary);
}

.inner-accordion-title {
  flex: 1;
  min-width: 0;
}
.inner-accordion-title h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}
.inner-accordion-title p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.inner-accordion-item.inner-open .inner-accordion-title p {
  display: none;
}

.inner-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.inner-accordion-item.inner-open .inner-chevron {
  transform: rotate(180deg);
}

.inner-accordion-body {
  display: none;
  padding: 0 var(--space-5) var(--space-5);
}
.inner-accordion-item.inner-open .inner-accordion-body {
  display: block;
}

.inner-accordion-body .inner-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

.inner-accordion-body .inner-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}
.inner-accordion-body .inner-gallery-item {
  display: flex;
  flex-direction: column;
}
.inner-accordion-body .inner-gallery-item img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.inner-accordion-body .inner-gallery-item img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}
.inner-accordion-body .inner-gallery-item .inner-img-label {
  font-size: 11px;
  color: var(--color-text-faint);
  text-align: center;
  margin-top: var(--space-1);
  font-weight: 500;
}

/* Check-list inside inner accordion */
.inner-accordion-body .check-list {
  margin-top: 0;
  margin-bottom: var(--space-4);
}

/* Info highlight inside inner body */
.inner-accordion-body .inner-info {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}
.inner-accordion-body .inner-info p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 640px) {
  .inner-accordion-trigger {
    padding: var(--space-3) var(--space-4);
  }
  .inner-accordion-body {
    padding: 0 var(--space-4) var(--space-4);
  }
  .inner-accordion-body .inner-gallery {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   VIDEOS
   ======================================== */
.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-5);
}
.video-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive);
}
.video-card:hover { box-shadow: var(--shadow-sm); }
.video-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: #000;
}
.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.video-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) 0;
}
.footer-inner {
  text-align: center;
}
.footer-brand {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.footer-brand svg { display: block; }
.footer-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 50ch;
  margin: 0 auto var(--space-3);
  line-height: 1.5;
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ========================================
   RESPONSIVE
   ======================================== */
/* ========================================
   SCROLL ANIMATIONS
   ======================================== */
.animate-in {
  opacity: 0;
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.animate-in.visible {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .animate-in { opacity: 1; }
}

/* ========================================
   SLIDES GALLERY (Technical Guide)
   ======================================== */
.slides-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
.slide-item {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.18s ease;
}
.slide-item:hover {
  box-shadow: var(--shadow-md);
}
.slide-item img {
  width: 100%;
  height: auto;
  display: block;
}
.slide-label {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-align: center;
  font-weight: 500;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 640px) {
  .stats-bar { flex-direction: column; gap: var(--space-3); }
  .stat-divider { width: 40px; height: 1px; }
  .param-grid { grid-template-columns: repeat(2, 1fr); }
  .flashcard-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr; }
  .videos-grid { grid-template-columns: 1fr; }
  .content-grid, .content-grid.cols-2 { grid-template-columns: 1fr; }
  .workflow-step { flex-direction: column; gap: var(--space-3); }
}

/* ========================================
   QUIZ & FLASHCARDS (AssystRx SPA style)
   ======================================== */

/* Shared controls */
.kq-controls {
  display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.kq-filter {
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-md);
  border: 1px solid var(--color-divider); background: var(--color-bg);
  font-size: var(--text-sm); font-family: 'Lexend', sans-serif; color: var(--color-text);
  min-height: 44px; cursor: pointer;
}
.kq-filter:focus { border-color: #d4af37; outline: none; box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15); }

/* Buttons */
.kq-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-md);
  font-family: 'Lexend', sans-serif; font-size: var(--text-sm); font-weight: 600;
  border: none; cursor: pointer; transition: all 180ms cubic-bezier(0.16, 1, 0.3, 1);
  gap: var(--space-2); text-decoration: none; min-height: 44px;
}
.kq-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.kq-btn-sm { padding: var(--space-2) var(--space-3); font-size: var(--text-xs); min-height: 36px; }
.kq-btn-primary { background: var(--color-text); color: var(--color-bg); }
.kq-btn-primary:hover:not(:disabled) { opacity: 0.85; }
.kq-btn-gold { background: #d4af37; color: #1a1a1a; }
.kq-btn-gold:hover:not(:disabled) { background: #c9a030; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.kq-btn-ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-divider); }
.kq-btn-ghost:hover:not(:disabled) { border-color: var(--color-text); background: rgba(0,0,0,0.04); }
.kq-btn-success { background: #16a34a; color: white; border: none; }
.kq-btn-success:hover { background: #15803d; }
.kq-btn-warning { background: #f59e0b; color: white; border: none; }
.kq-btn-warning:hover { background: #d97706; }

/* Shared progress bar */
.kq-progress-bar {
  height: 4px; background: var(--color-divider); border-radius: 99px;
  margin-top: var(--space-4); overflow: hidden;
}
.kq-progress-fill {
  height: 100%; background: linear-gradient(90deg, var(--color-text), #d4af37);
  border-radius: 99px; transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Section badge */
.kq-section-badge {
  font-size: var(--text-xs); color: var(--color-text-muted); margin-bottom: var(--space-3);
  font-weight: 500;
}

/* ── QUIZ ── */
.kq-start { text-align: center; }
.kq-count { font-size: var(--text-lg); color: var(--color-text-muted); margin: var(--space-6) 0; }
.kq-header {
  display: flex; justify-content: space-between; align-items: center;
  font-size: var(--text-sm); font-weight: 600; color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.kq-card {
  background: var(--color-bg); border: 1px solid var(--color-divider);
  border-radius: 16px; padding: var(--space-8);
  box-shadow: var(--shadow-sm); margin-top: var(--space-4);
}
.kq-question {
  font-family: 'Lexend', sans-serif; font-size: var(--text-lg); font-weight: 600;
  color: var(--color-text); margin-bottom: var(--space-6); line-height: 1.4;
}
.kq-options { display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-6); }
.kq-option {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-4); border-radius: 12px;
  border: 2px solid var(--color-divider); background: var(--color-bg);
  font-size: var(--text-sm); text-align: left; min-height: 48px;
  font-family: 'Lexend', sans-serif; cursor: pointer;
  transition: border-color 180ms, background 180ms, transform 180ms;
}
.kq-option:hover:not(:disabled) { border-color: var(--color-text); transform: translateX(4px); }
.kq-option:active:not(:disabled) { transform: translateX(2px); }
.kq-option.selected { border-color: #d4af37; background: rgba(212, 175, 55, 0.08); }
.kq-option.correct { border-color: #16a34a; background: rgba(22, 163, 74, 0.1); }
.kq-option.wrong { border-color: #dc2626; background: rgba(220, 38, 38, 0.08); }
.kq-option-letter {
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; background: var(--color-divider);
  font-weight: 700; font-size: var(--text-xs); flex-shrink: 0;
}

.kq-feedback {
  padding: var(--space-4); border-radius: 12px; margin-bottom: var(--space-4);
}
.kq-feedback.feedback-correct { background: rgba(22, 163, 74, 0.1); border-left: 4px solid #16a34a; }
.kq-feedback.feedback-wrong { background: rgba(220, 38, 38, 0.08); border-left: 4px solid #dc2626; }
.kq-feedback p { font-size: var(--text-sm); margin-top: var(--space-2); color: var(--color-text-muted); }
.kq-nav { display: flex; justify-content: flex-end; }

/* Results */
.kq-results-card {
  background: var(--color-bg); border: 1px solid var(--color-divider);
  border-radius: 16px; padding: var(--space-8); text-align: center;
  box-shadow: var(--shadow-md); margin-bottom: var(--space-8);
}
.kq-results-pct { font-family: 'Lexend', sans-serif; font-size: var(--text-3xl); font-weight: 700; color: #d4af37; }
.kq-results-detail { font-size: var(--text-lg); color: var(--color-text-muted); margin: var(--space-2) 0; }
.kq-results-msg { font-size: var(--text-base); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-6); }
.kq-results-actions { display: flex; gap: var(--space-4); justify-content: center; }

.kq-wrong-heading { font-family: 'Lexend', sans-serif; font-size: var(--text-lg); color: #dc2626; margin-bottom: var(--space-4); }
.kq-wrong-list { display: flex; flex-direction: column; gap: var(--space-4); }
.kq-wrong-item {
  background: var(--color-bg); border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: 12px; padding: var(--space-4);
}
.kq-wrong-q { font-weight: 600; margin-bottom: var(--space-2); }
.kq-wrong-your { color: #dc2626; font-size: var(--text-sm); }
.kq-wrong-correct { color: #16a34a; font-size: var(--text-sm); }
.kq-wrong-explain { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-2); font-style: italic; }

/* ── FLASHCARDS ── */
.kq-fc-progress {
  display: flex; justify-content: space-between; align-items: center;
  font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-4);
}
.kq-fc-status { display: flex; gap: var(--space-4); }
.kq-known-count { color: #16a34a; font-weight: 600; }
.kq-review-count { color: #f59e0b; font-weight: 600; }

.kq-fc-card-wrap { perspective: 1000px; margin-bottom: var(--space-6); }
.kq-fc-card {
  height: 280px; cursor: pointer; position: relative;
  border-radius: 16px;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
}
.kq-fc-card.flipped { transform: rotateY(180deg); }
.kq-fc-card.is-known { box-shadow: 0 0 0 3px #16a34a; }
.kq-fc-card.is-review { box-shadow: 0 0 0 3px #f59e0b; }

.kq-fc-card-inner {
  position: relative; width: 100%; height: 280px;
  transform-style: preserve-3d; -webkit-transform-style: preserve-3d;
}
.kq-fc-front, .kq-fc-back {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  padding: var(--space-8); text-align: center;
  border-radius: 16px; border: 1px solid var(--color-divider);
  background: var(--color-bg); box-shadow: var(--shadow-md);
}
.kq-fc-back {
  transform: rotateY(180deg);
  background: rgba(212, 175, 55, 0.06);
}
.kq-fc-question { font-family: 'Lexend', sans-serif; font-size: var(--text-lg); font-weight: 600; color: var(--color-text); }
.kq-fc-answer { font-size: var(--text-base); font-weight: 500; color: var(--color-text); line-height: 1.5; }
.kq-fc-hint { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-4); }

.kq-fc-nav { display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.kq-fc-marking { display: flex; gap: var(--space-2); }

/* Mobile responsive for Quiz/Flashcards */
@media (max-width: 640px) {
  .kq-card { padding: var(--space-4); }
  .kq-question { font-size: var(--text-base); }
  .kq-fc-card-inner { height: 240px; }
  .kq-fc-front, .kq-fc-back { min-height: 240px; }
  .kq-fc-nav { flex-direction: column; gap: var(--space-3); }
  .kq-fc-nav > * { width: 100%; justify-content: center; }
  .kq-results-card { padding: var(--space-4); }
}

/* ========================================
   STUDY GUIDE (NotebookLM-style)
   ======================================== */

/* Module list */
.sg-modules {
  display: flex; flex-direction: column; gap: var(--space-3);
}

/* Module card — top level accordion */
.sg-module {
  border: 1px solid var(--color-divider);
  border-radius: 16px; background: var(--color-bg);
  overflow: hidden;
  transition: border-color 180ms, box-shadow 180ms;
}
.sg-module:hover { box-shadow: var(--shadow-sm); }
.sg-module.sg-open { border-color: #d4af37; }

.sg-module-trigger {
  width: 100%; display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  cursor: pointer; text-align: left; background: transparent;
  transition: background 180ms;
}
.sg-module-trigger:hover { background: var(--color-surface); }

.sg-module-num {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  background: #d4af37; color: #1a1a1a;
  font-size: var(--text-sm); font-weight: 700;
  border-radius: var(--radius-full); flex-shrink: 0;
}
.sg-module-title {
  flex: 1; font-family: 'Lexend', sans-serif;
  font-size: var(--text-base); font-weight: 600; color: var(--color-text);
}
.sg-module-count {
  font-size: var(--text-xs); color: var(--color-text-muted);
  margin-left: auto; flex-shrink: 0;
}
.sg-module-chevron {
  width: 20px; height: 20px; flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.sg-module.sg-open .sg-module-chevron { transform: rotate(180deg); }

.sg-module-body {
  display: none; padding: 0 var(--space-6) var(--space-6);
}
.sg-module.sg-open .sg-module-body { display: block; }

/* Subsection card — second level */
.sg-subs { display: flex; flex-direction: column; gap: var(--space-3); }

.sg-sub {
  border: 1px solid var(--color-divider);
  border-radius: 12px; background: var(--color-surface);
  overflow: hidden;
  transition: border-color 180ms, box-shadow 180ms;
}
.sg-sub.sg-open { border-color: rgba(212, 175, 55, 0.4); }

.sg-sub-trigger {
  width: 100%; display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  cursor: pointer; text-align: left; background: transparent;
  transition: background 180ms;
}
.sg-sub-trigger:hover { background: rgba(0,0,0,0.03); }
[data-theme="dark"] .sg-sub-trigger:hover { background: rgba(255,255,255,0.04); }

.sg-sub-id {
  font-size: var(--text-xs); font-weight: 700; color: #d4af37;
  flex-shrink: 0; min-width: 28px;
}
.sg-sub-title {
  flex: 1; font-family: 'Lexend', sans-serif;
  font-size: var(--text-sm); font-weight: 600; color: var(--color-text);
}
.sg-sub-chevron {
  width: 16px; height: 16px; flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.sg-sub.sg-open .sg-sub-chevron { transform: rotate(180deg); }

.sg-sub-body {
  display: none; padding: 0 var(--space-5) var(--space-5);
}
.sg-sub.sg-open .sg-sub-body { display: block; }

/* Topics — third level */
.sg-topics { display: flex; flex-direction: column; gap: var(--space-2); }

.sg-topic {
  border: 1px solid var(--color-divider);
  border-radius: 8px; background: var(--color-bg);
  overflow: hidden;
  transition: border-color 180ms;
}
.sg-topic.sg-open { border-color: rgba(212, 175, 55, 0.3); }

.sg-topic-trigger {
  width: 100%; display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  cursor: pointer; text-align: left; background: transparent;
  transition: background 180ms;
}
.sg-topic-trigger:hover { background: var(--color-surface); }

.sg-topic-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #d4af37; flex-shrink: 0; opacity: 0.6;
}
.sg-topic.sg-open .sg-topic-dot { opacity: 1; }

.sg-topic-name {
  flex: 1; font-family: 'Lexend', sans-serif;
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text);
}
.sg-topic-refs {
  font-size: 10px; color: var(--color-text-muted);
  flex-shrink: 0;
}
.sg-ref-link {
  color: #d4af37; cursor: pointer; font-weight: 700;
  text-decoration: underline; text-decoration-style: dotted;
  text-underline-offset: 2px;
  transition: color 0.18s, background 0.18s;
  padding: 0 2px; border-radius: 3px;
}
.sg-ref-link:hover {
  color: #fff; background: #d4af37;
}
.sg-topic-chevron {
  width: 14px; height: 14px; flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.sg-topic.sg-open .sg-topic-chevron { transform: rotate(180deg); }

.sg-topic-body {
  display: none;
  padding: var(--space-3) var(--space-4) var(--space-4) calc(8px + var(--space-3) + var(--space-4));
}
.sg-topic.sg-open .sg-topic-body { display: block; }

.sg-topic-content {
  font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.7;
}
.sg-topic-content strong { color: var(--color-text); font-weight: 600; }

.sg-topic-ref-tags {
  display: flex; flex-wrap: wrap; gap: 4px; margin-top: var(--space-3);
}
.sg-ref-tag {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 22px; padding: 0 6px;
  font-size: 10px; font-weight: 700; color: #d4af37;
  background: rgba(212, 175, 55, 0.1); border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius-full);
  cursor: pointer; font-family: 'Lexend', sans-serif;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}
.sg-ref-tag:hover {
  background: #d4af37; color: #fff; border-color: #d4af37;
  transform: scale(1.1);
}

/* Expand/Collapse all controls */
.sg-controls {
  display: flex; gap: var(--space-3); margin-bottom: var(--space-4); justify-content: flex-end;
}

/* Mobile responsive for Study Guide */
@media (max-width: 640px) {
  .sg-module-trigger { padding: var(--space-4); gap: var(--space-3); }
  .sg-module-body { padding: 0 var(--space-3) var(--space-4); }
  .sg-module-title { font-size: var(--text-sm); }
  .sg-sub-trigger { padding: var(--space-3) var(--space-4); }
  .sg-sub-body { padding: 0 var(--space-4) var(--space-4); }
  .sg-topic-trigger { padding: var(--space-2) var(--space-3); }
  .sg-topic-body { padding: var(--space-2) var(--space-3) var(--space-3); }
}

/* ================================
   REFERENCE PAGE MODAL
   ================================ */
.ref-modal {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.ref-modal.ref-modal-open {
  opacity: 1; pointer-events: auto;
}
.ref-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}
.ref-modal-content {
  position: relative; z-index: 1;
  background: var(--color-surface, #fff);
  border-radius: 12px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.3);
  max-width: 90vw; max-height: 90vh;
  display: flex; flex-direction: column;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.ref-modal.ref-modal-open .ref-modal-content {
  transform: scale(1);
}
.ref-modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  flex-shrink: 0;
}
.ref-modal-title {
  font-family: 'Lexend', sans-serif;
  font-size: var(--text-sm); font-weight: 600;
  color: var(--color-text);
}
.ref-modal-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent;
  color: var(--color-text-muted); cursor: pointer;
  font-size: 22px; border-radius: var(--radius-full);
  transition: background 0.18s, color 0.18s;
}
.ref-modal-close:hover {
  background: rgba(0,0,0,0.08); color: var(--color-text);
}
.ref-modal-body {
  overflow: auto; padding: var(--space-3);
  display: flex; align-items: flex-start; justify-content: center;
}
.ref-modal-img {
  max-width: 100%; height: auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Dark mode adjustments */
[data-theme="dark"] .ref-modal-backdrop {
  background: rgba(0, 0, 0, 0.85);
}
[data-theme="dark"] .ref-modal-header {
  border-bottom-color: rgba(255,255,255,0.1);
}
[data-theme="dark"] .ref-modal-close:hover {
  background: rgba(255,255,255,0.1);
}
[data-theme="dark"] .sg-ref-link:hover {
  color: #1a1a1a;
}

@media (max-width: 640px) {
  .ref-modal-content {
    max-width: 96vw; max-height: 92vh;
    border-radius: 8px;
  }
  .ref-modal-body { padding: var(--space-2); }
}


/* ===== PDF Viewer ===== */
.pdf-viewer-container {
  width: 100%;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.1);
  background: var(--color-surface);
}

.pdf-viewer-iframe {
  width: 100%;
  height: 80vh;
  min-height: 600px;
  border: none;
  display: block;
}

.pdf-fallback {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-6);
  text-align: center;
  gap: var(--space-4);
}

.pdf-open-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.18s ease;
}
.pdf-open-btn:hover { opacity: 0.85; }

.pdf-open-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-family);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  border: 1px solid var(--color-primary);
  border-radius: 6px;
  transition: background 0.18s ease, color 0.18s ease;
}
.pdf-open-link:hover {
  background: var(--color-primary);
  color: #fff;
}
.pdf-open-link svg { flex-shrink: 0; }

.pdf-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.pdf-actions .pdf-open-link {
  margin-top: 0;
}
.pdf-download-link {
  background: var(--color-primary);
  color: #fff !important;
}
.pdf-download-link:hover {
  opacity: 0.9;
}

@media (max-width: 768px) {
  .pdf-viewer-iframe {
    height: 60vh;
    min-height: 400px;
  }
}

/* Hero feature chips hover */
.hero-feature-chip:hover {
  border-color: #d4af37 !important;
  color: #d4af37 !important;
}