/* ============================================
   DISC EDUCATION CENTER - STYLES
   Extends main design system (styles.css)
   ============================================ */

/* ============================================
   EDUCATION HUB (learn.html)
   ============================================ */

/* -- Hub Hero -- */
.learn-hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 120px;
  padding-bottom: var(--space-3xl);
  position: relative;
  overflow: hidden;
}

.learn-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 100%;
  background: radial-gradient(ellipse at center,
    rgba(139,92,246,0.08) 0%,
    rgba(59,130,246,0.04) 30%,
    rgba(16,185,129,0.03) 60%,
    transparent 100%
  );
  pointer-events: none;
  animation: learn-ambient 10s ease-in-out infinite alternate;
}

@keyframes learn-ambient {
  0% { transform: translateX(-50%) scale(1); opacity: 1; }
  100% { transform: translateX(-50%) scale(1.1); opacity: 0.7; }
}

.learn-hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.learn-hero__title {
  margin-bottom: var(--space-md);
}

.learn-hero__subtitle {
  font-size: clamp(1.05rem, 1vw + 0.85rem, 1.25rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* -- Progress Bar (Hub) -- */
.learn-progress-bar {
  margin-top: var(--space-2xl);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.learn-progress-bar__label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.learn-progress-bar__count {
  color: var(--accent);
  font-family: var(--font-mono);
  transition: color var(--transition-slow);
}

.learn-progress-bar__track {
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--bg-3);
  overflow: hidden;
}

.learn-progress-bar__fill {
  height: 100%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--disc-d), var(--disc-i), var(--disc-s), var(--disc-c));
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  width: 0%;
}

/* -- Quick Stats Sidebar -- */
.learn-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-2xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (max-width: 960px) {
  .learn-layout {
    grid-template-columns: 1fr;
  }
  .learn-sidebar {
    order: -1;
  }
}

.learn-sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
}

.learn-sidebar__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.learn-sidebar__card h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.learn-sidebar__type {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.learn-sidebar__type-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
}

.learn-sidebar__type-badge.type-d { background: var(--disc-d); }
.learn-sidebar__type-badge.type-i { background: var(--disc-i); }
.learn-sidebar__type-badge.type-s { background: var(--disc-s); }
.learn-sidebar__type-badge.type-c { background: var(--disc-c); }

.learn-sidebar__type-info h3 {
  font-size: 1.1rem;
  margin-bottom: 2px;
}

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

.learn-sidebar__cta {
  display: block;
  width: 100%;
  text-align: center;
  padding: 12px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  color: #fff;
  background: var(--accent);
  box-shadow: 0 4px 16px var(--accent-glow);
  transition: all var(--transition-base), background var(--transition-slow), box-shadow var(--transition-slow);
  text-decoration: none;
}

.learn-sidebar__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.learn-sidebar__cta--secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
  margin-top: var(--space-sm);
}

.learn-sidebar__cta--secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

/* -- Learning Path -- */
.learn-path {
  padding-bottom: var(--space-section);
}

.learn-path__section-label {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  margin-top: var(--space-2xl);
}

.learn-path__section-label:first-child {
  margin-top: 0;
}

.learn-path__section-label span {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.learn-path__section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* -- Lesson Cards -- */
.learn-path__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.lesson-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}

.lesson-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.lesson-card--completed {
  border-color: rgba(16,185,129,0.3);
}

.lesson-card--completed::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--disc-s);
}

.lesson-card--locked {
  opacity: 0.65;
}

.lesson-card--locked:hover {
  opacity: 0.8;
}

.lesson-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.lesson-card__number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-2);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.lesson-card__status {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lesson-card__status--done {
  background: rgba(16,185,129,0.15);
  color: var(--disc-s);
}

.lesson-card__status--done svg {
  width: 14px;
  height: 14px;
}

.lesson-card__status--locked {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
}

.lesson-card__status--locked svg {
  width: 14px;
  height: 14px;
}

.lesson-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.lesson-card__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.lesson-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.lesson-card__meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.lesson-card__meta svg {
  width: 14px;
  height: 14px;
}

.lesson-card__premium-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--disc-i);
  background: rgba(245,158,11,0.1);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  margin-top: var(--space-sm);
}

/* ============================================
   LESSON PAGES
   ============================================ */

/* -- Breadcrumbs -- */
.lesson-breadcrumbs {
  padding: 100px var(--space-lg) 0;
  max-width: 1200px;
  margin: 0 auto;
}

.lesson-breadcrumbs__inner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.lesson-breadcrumbs__inner a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.lesson-breadcrumbs__inner a:hover {
  color: var(--text);
}

.lesson-breadcrumbs__sep {
  color: var(--text-muted);
  opacity: 0.4;
}

.lesson-breadcrumbs__current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* -- Lesson Header -- */
.lesson-header {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-xl);
}

.lesson-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.lesson-header__number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}

.lesson-header__time {
  display: flex;
  align-items: center;
  gap: 4px;
}

.lesson-header__time svg {
  width: 14px;
  height: 14px;
}

.lesson-header__title {
  font-size: clamp(2rem, 4vw + 0.5rem, 3rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.lesson-header__desc {
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* -- Lesson Progress Indicator -- */
.lesson-progress {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  z-index: 900;
  background: rgba(8,8,15,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-sm) 0;
  transform: translateY(-100%);
  transition: transform var(--transition-base);
}

[data-theme="light"] .lesson-progress {
  background: rgba(248,248,252,0.9);
}

.lesson-progress.visible {
  transform: translateY(0);
}

.lesson-progress__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lesson-progress__title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.lesson-progress__track {
  flex: 1;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--bg-3);
  overflow: hidden;
}

.lesson-progress__fill {
  height: 100%;
  border-radius: var(--radius-pill);
  background: var(--accent);
  transition: width 0.3s ease, background var(--transition-slow);
  width: 0%;
}

.lesson-progress__pct {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 36px;
  text-align: right;
}

/* -- Lesson Content -- */
.lesson-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-3xl);
}

.lesson-content h2 {
  font-size: clamp(1.5rem, 2.5vw + 0.5rem, 2rem);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  position: relative;
}

.lesson-content h2::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 60px;
  height: 3px;
  border-radius: 2px;
}

.lesson-content h2.accent-d::before { background: var(--disc-d); }
.lesson-content h2.accent-i::before { background: var(--disc-i); }
.lesson-content h2.accent-s::before { background: var(--disc-s); }
.lesson-content h2.accent-c::before { background: var(--disc-c); }
.lesson-content h2.accent-blend::before {
  background: linear-gradient(90deg, var(--disc-d), var(--disc-i), var(--disc-s), var(--disc-c));
  width: 80px;
}

.lesson-content h3 {
  font-size: clamp(1.15rem, 1.5vw + 0.25rem, 1.4rem);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.lesson-content p {
  margin-bottom: var(--space-lg);
  font-size: clamp(0.95rem, 0.3vw + 0.9rem, 1.05rem);
  line-height: 1.8;
}

.lesson-content ul,
.lesson-content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.lesson-content ul { list-style: disc; }
.lesson-content ol { list-style: decimal; }

.lesson-content li {
  font-size: clamp(0.95rem, 0.3vw + 0.9rem, 1.05rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-sm);
}

.lesson-content strong {
  color: var(--text);
  font-weight: 600;
}

/* -- Callout Boxes -- */
.callout {
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-xl);
  position: relative;
  border-left: 4px solid;
}

.callout__title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
}

.callout p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.callout--pro-tip {
  background: rgba(16,185,129,0.06);
  border-color: var(--disc-s);
}
.callout--pro-tip .callout__title { color: var(--disc-s); }

.callout--watch-out {
  background: rgba(245,158,11,0.06);
  border-color: var(--disc-i);
}
.callout--watch-out .callout__title { color: var(--disc-i); }

.callout--try-this {
  background: rgba(59,130,246,0.06);
  border-color: var(--disc-c);
}
.callout--try-this .callout__title { color: var(--disc-c); }

.callout--key-point {
  background: rgba(239,68,68,0.06);
  border-color: var(--disc-d);
}
.callout--key-point .callout__title { color: var(--disc-d); }

/* -- Scenario Cards -- */
.scenario-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.scenario-card__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: var(--space-sm);
  transition: color var(--transition-slow);
}

.scenario-card__text {
  font-size: 1.05rem;
  color: var(--text);
  font-style: italic;
  line-height: 1.7;
}

/* -- Pull Quote -- */
.pull-quote {
  border-left: 4px solid var(--accent);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-2xl) 0;
  background: var(--bg-card);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  transition: border-color var(--transition-slow);
}

.pull-quote p {
  font-size: clamp(1.1rem, 1vw + 0.85rem, 1.35rem);
  font-weight: 500;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 0;
}

.pull-quote cite {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: normal;
  margin-top: var(--space-sm);
}

/* ============================================
   INTERACTIVE COMPONENTS
   ============================================ */

/* -- Type Comparison Cards -- */
.type-comparison {
  margin: var(--space-2xl) 0;
}

.type-comparison__tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.type-comparison__tab {
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.type-comparison__tab:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.type-comparison__tab.active {
  color: #fff;
  border-color: transparent;
}

.type-comparison__tab.active[data-type="d"] { background: var(--disc-d); }
.type-comparison__tab.active[data-type="i"] { background: var(--disc-i); color: #000; }
.type-comparison__tab.active[data-type="s"] { background: var(--disc-s); }
.type-comparison__tab.active[data-type="c"] { background: var(--disc-c); }

.type-comparison__panel {
  display: none;
  animation: fadeSlideIn 0.3s ease;
}

.type-comparison__panel.active {
  display: block;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.type-comparison__content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.type-comparison__content h4 {
  margin-bottom: var(--space-md);
}

.type-comparison__content p {
  margin-bottom: var(--space-sm);
}

/* -- Spot the Type Exercise -- */
.spot-exercise {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.spot-exercise__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--disc-c);
  margin-bottom: var(--space-md);
}

.spot-exercise__scenario {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.spot-exercise__options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

@media (max-width: 600px) {
  .spot-exercise__options {
    grid-template-columns: repeat(2, 1fr);
  }
}

.spot-exercise__btn {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 2px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  transition: all var(--transition-fast);
}

.spot-exercise__btn:hover:not(.disabled) {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.spot-exercise__btn.correct {
  border-color: var(--disc-s);
  background: rgba(16,185,129,0.12);
  color: var(--disc-s);
}

.spot-exercise__btn.incorrect {
  border-color: var(--disc-d);
  background: rgba(239,68,68,0.08);
  color: var(--disc-d);
  opacity: 0.6;
}

.spot-exercise__btn.disabled {
  cursor: default;
  pointer-events: none;
}

.spot-exercise__feedback {
  display: none;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: var(--space-md);
}

.spot-exercise__feedback.show {
  display: block;
  animation: fadeSlideIn 0.3s ease;
}

.spot-exercise__feedback.correct {
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  color: var(--text-secondary);
}

.spot-exercise__feedback.incorrect {
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.2);
  color: var(--text-secondary);
}

.spot-exercise__score {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* -- Interactive Quadrant Map -- */
/* Override styles.css assessment quadrant (240px grid) with lesson quadrant */
.lesson-content .quadrant-map {
  display: block;
  width: auto;
  height: auto;
  margin: var(--space-2xl) 0;
  position: relative;
  grid-template-columns: none;
  grid-template-rows: none;
  gap: 0;
  overflow: visible;
}

.quadrant-map__container {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.quadrant-map__quad {
  position: absolute;
  width: 50%;
  height: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid var(--border);
}

.quadrant-map__quad:hover {
  z-index: 2;
  transform: scale(1.02);
}

.quadrant-map__quad.active {
  z-index: 3;
  box-shadow: 0 0 0 3px var(--bg-0), 0 0 0 5px currentColor;
}

.quadrant-map__quad--d { top: 0; left: 0; background: rgba(239,68,68,0.1); color: var(--disc-d); }
.quadrant-map__quad--i { top: 0; right: 0; background: rgba(245,158,11,0.1); color: var(--disc-i); }
.quadrant-map__quad--s { bottom: 0; right: 0; background: rgba(16,185,129,0.1); color: var(--disc-s); }
.quadrant-map__quad--c { bottom: 0; left: 0; background: rgba(59,130,246,0.1); color: var(--disc-c); }

.quadrant-map__quad-label {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
}

.quadrant-map__quad-name {
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 4px;
  color: var(--text-secondary);
}

.quadrant-map__axis-label {
  position: absolute;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.quadrant-map__axis-label--top { top: -24px; left: 50%; transform: translateX(-50%); }
.quadrant-map__axis-label--bottom { bottom: -24px; left: 50%; transform: translateX(-50%); }
.quadrant-map__axis-label--left { left: -8px; top: 50%; transform: translateY(-50%) rotate(-90deg); }
.quadrant-map__axis-label--right { right: -8px; top: 50%; transform: translateY(-50%) rotate(90deg); }

.quadrant-map__info {
  margin-top: var(--space-xl);
  min-height: 80px;
}

.quadrant-map__info-panel {
  display: none;
  animation: fadeSlideIn 0.3s ease;
}

.quadrant-map__info-panel.active {
  display: block;
}

.quadrant-map__info-panel h4 {
  margin-bottom: var(--space-sm);
}

/* -- Type Selector Tabs (used in content) -- */
.type-tabs {
  margin: var(--space-2xl) 0;
}

.type-tabs__nav {
  display: flex;
  gap: 2px;
  margin-bottom: 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
}

.type-tabs__btn {
  flex: 1;
  padding: 12px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  background: var(--bg-2);
  color: var(--text-muted);
  border: none;
  transition: all var(--transition-fast);
}

.type-tabs__btn:hover {
  background: var(--bg-3);
  color: var(--text-secondary);
}

.type-tabs__btn.active {
  color: #fff;
}

.type-tabs__btn.active[data-type="d"] { background: var(--disc-d); }
.type-tabs__btn.active[data-type="i"] { background: var(--disc-i); color: #000; }
.type-tabs__btn.active[data-type="s"] { background: var(--disc-s); }
.type-tabs__btn.active[data-type="c"] { background: var(--disc-c); }

.type-tabs__panel {
  display: none;
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  animation: fadeSlideIn 0.25s ease;
}

.type-tabs__panel.active {
  display: block;
}

.type-tabs__panel p {
  margin-bottom: var(--space-sm);
}

.type-tabs__panel p:last-child {
  margin-bottom: 0;
}

/* -- Scenario Simulator -- */
.scenario-sim {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.scenario-sim__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--disc-i);
  margin-bottom: var(--space-md);
}

.scenario-sim__question {
  font-size: 1.1rem;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.scenario-sim__choices {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.scenario-sim__choice {
  padding: 14px var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  text-align: left;
  transition: all var(--transition-fast);
  line-height: 1.5;
}

.scenario-sim__choice:hover:not(.disabled) {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text);
}

.scenario-sim__choice.selected {
  border-color: var(--accent);
  background: rgba(139,92,246,0.08);
  color: var(--text);
  transition: border-color var(--transition-slow), background var(--transition-slow);
}

.scenario-sim__choice.disabled {
  cursor: default;
  pointer-events: none;
}

.scenario-sim__feedback {
  display: none;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-top: var(--space-md);
  animation: fadeSlideIn 0.3s ease;
}

.scenario-sim__feedback.show {
  display: block;
}

.scenario-sim__feedback p {
  margin-bottom: var(--space-sm);
}

.scenario-sim__feedback p:last-child {
  margin-bottom: 0;
}

/* -- Animated Stress Shift -- */
.stress-shift {
  margin: var(--space-2xl) 0;
  text-align: center;
}

.stress-shift__visual {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  margin: 0 auto var(--space-lg);
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
}

.stress-shift__dot {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  transition: all 1.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 2;
}

.stress-shift__dot--normal {
  background: var(--disc-s);
  box-shadow: 0 0 12px var(--disc-s-glow);
}

.stress-shift__dot--stress {
  background: var(--disc-d);
  box-shadow: 0 0 12px var(--disc-d-glow);
  opacity: 0;
}

.stress-shift.animating .stress-shift__dot--normal {
  opacity: 0;
}

.stress-shift.animating .stress-shift__dot--stress {
  opacity: 1;
}

.stress-shift__grid-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.stress-shift__grid-lines::before,
.stress-shift__grid-lines::after {
  content: '';
  position: absolute;
  background: var(--border);
}

.stress-shift__grid-lines::before {
  top: 0; bottom: 0; left: 50%; width: 1px;
}

.stress-shift__grid-lines::after {
  left: 0; right: 0; top: 50%; height: 1px;
}

.stress-shift__label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.stress-shift__btn {
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  transition: all var(--transition-fast);
}

.stress-shift__btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* ============================================
   LOCK WALL (Premium)
   ============================================ */

.lock-wall {
  position: relative;
  margin: var(--space-2xl) 0;
  padding: var(--space-3xl) var(--space-xl);
  border-radius: var(--radius-xl);
  text-align: center;
  background:
    linear-gradient(to bottom, transparent, var(--bg-0) 30%),
    var(--bg-card);
  border: 1px solid var(--border);
}

.lock-wall::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(to bottom, var(--bg-0), transparent);
  pointer-events: none;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.lock-wall__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245,158,11,0.1);
  color: var(--disc-i);
}

.lock-wall__icon svg {
  width: 28px;
  height: 28px;
}

.lock-wall__title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.lock-wall__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 420px;
  margin: 0 auto var(--space-xl);
}

.lock-wall__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--disc-d), var(--disc-i), var(--disc-s), var(--disc-c));
  color: #fff;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(139,92,246,0.25);
  transition: all var(--transition-base);
}

.lock-wall__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139,92,246,0.35);
}

.lock-wall__toc {
  margin-top: var(--space-2xl);
  text-align: left;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.lock-wall__toc h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.lock-wall__toc ul {
  list-style: none;
  padding: 0;
}

.lock-wall__toc li {
  padding: var(--space-sm) 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  opacity: 0.5;
}

.lock-wall__toc li svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* -- Premium Inline Teaser (within free lessons) -- */
.premium-teaser {
  background: var(--bg-2);
  border: 1px dashed rgba(245,158,11,0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.premium-teaser__icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245,158,11,0.1);
  color: var(--disc-i);
  flex-shrink: 0;
}

.premium-teaser__icon svg {
  width: 16px;
  height: 16px;
}

.premium-teaser__content {
  flex: 1;
}

.premium-teaser__content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.premium-teaser__content p:last-child {
  margin-bottom: 0;
}

.premium-teaser__link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--disc-i);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.premium-teaser__link:hover {
  color: var(--text);
}

.premium-teaser__link svg {
  width: 14px;
  height: 14px;
}

/* -- Personalized Insight (shown when user has taken assessment) -- */
.personalized-insight {
  background: var(--bg-card);
  border: 1px solid;
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
}

.personalized-insight[data-for-type="d"] { border-color: rgba(239,68,68,0.3); }
.personalized-insight[data-for-type="i"] { border-color: rgba(245,158,11,0.3); }
.personalized-insight[data-for-type="s"] { border-color: rgba(16,185,129,0.3); }
.personalized-insight[data-for-type="c"] { border-color: rgba(59,130,246,0.3); }

.personalized-insight__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.personalized-insight[data-for-type="d"] .personalized-insight__label { color: var(--disc-d); }
.personalized-insight[data-for-type="i"] .personalized-insight__label { color: var(--disc-i); }
.personalized-insight[data-for-type="s"] .personalized-insight__label { color: var(--disc-s); }
.personalized-insight[data-for-type="c"] .personalized-insight__label { color: var(--disc-c); }

.personalized-insight p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ============================================
   LESSON NAVIGATION (prev/next)
   ============================================ */

.lesson-nav {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
  display: flex;
  justify-content: space-between;
  gap: var(--space-lg);
  border-top: 1px solid var(--border);
}

.lesson-nav__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  color: inherit;
  max-width: 45%;
  transition: all var(--transition-fast);
}

.lesson-nav__link:hover {
  transform: translateX(4px);
}

.lesson-nav__link--prev:hover {
  transform: translateX(-4px);
}

.lesson-nav__link--next {
  text-align: right;
  margin-left: auto;
}

.lesson-nav__dir {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.lesson-nav__dir svg {
  width: 14px;
  height: 14px;
}

.lesson-nav__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

/* -- Back to Learning Path button -- */
.lesson-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}

.lesson-back:hover {
  color: var(--text);
}

.lesson-back svg {
  width: 16px;
  height: 16px;
}

/* ============================================
   FOOTER (shared)
   ============================================ */

.learn-footer {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
}

.learn-footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.learn-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.learn-footer a:hover {
  color: var(--text);
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .nav,
  .lesson-progress,
  .lesson-nav,
  .learn-sidebar,
  .scroll-progress,
  .lock-wall__cta,
  .premium-teaser,
  .spot-exercise__options,
  .scenario-sim__choices,
  .stress-shift__btn,
  .type-comparison__tabs,
  .type-tabs__nav {
    display: none !important;
  }

  .lesson-content {
    max-width: 100%;
    padding: 0;
  }

  .lesson-header {
    padding: 20px 0;
  }

  body {
    background: #fff;
    color: #1a1a2e;
  }

  .lesson-content h2 {
    break-after: avoid;
  }

  .callout {
    break-inside: avoid;
  }

  /* Show all tab panels for print */
  .type-comparison__panel,
  .type-tabs__panel {
    display: block !important;
  }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  .lesson-breadcrumbs {
    padding-top: 80px;
  }

  .lesson-header {
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }

  .lesson-content {
    padding: 0 var(--space-md) var(--space-2xl);
  }

  .lesson-content h2 {
    margin-top: var(--space-2xl);
  }

  .lesson-nav {
    padding: var(--space-lg) var(--space-md) var(--space-2xl);
    flex-direction: column;
    gap: var(--space-md);
  }

  .lesson-nav__link {
    max-width: 100%;
  }

  .lesson-nav__link--next {
    text-align: left;
  }

  .callout {
    padding: var(--space-md) var(--space-lg);
  }

  .scenario-sim__choice {
    padding: 12px var(--space-md);
    font-size: 0.9rem;
  }

  .lock-wall {
    padding: var(--space-2xl) var(--space-md);
  }

  .learn-path__grid {
    grid-template-columns: 1fr;
  }

  .type-tabs__nav {
    flex-wrap: wrap;
  }

  .type-tabs__btn {
    flex: 1 1 45%;
  }
}