/* Zornux Academy — the learning platform's own surface, layered on the design tokens.
   Everything references the shared CSS variables (color, space, radius, shadow), so it
   is theme-aware (light/dark) by construction and never hardcodes a raw color. Scoped
   to `academy-` classes so it cannot leak into the marketing site. */

/* ---- Hero ---- */
.academy-hero {
  padding: var(--space-8) 0 var(--space-6);
  text-align: center;
  max-width: var(--layout-content-width-narrow);
  margin-inline: auto;
}
.academy-hero__title {
  font-size: var(--font-size-4xl);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin: var(--space-3) 0;
}
.academy-hero__lead {
  color: var(--color-text-secondary);
}
.academy-hero__cta {
  justify-content: center;
  margin-top: var(--space-5);
}
.academy-hero__release {
  margin-top: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}
.academy-hero__release strong {
  color: var(--color-brand);
}

/* ---- Card grid + cards ---- */
.academy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: var(--space-5);
}

.academy-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}
.academy-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-brand);
  box-shadow: var(--shadow-md);
}
.academy-card:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}
.academy-card__top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.academy-card__title {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-snug);
  margin: var(--space-1) 0 0;
}
.academy-card__summary {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}
.academy-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.academy-card__tech {
  font-weight: var(--font-weight-medium);
  color: var(--color-secondary);
}
.academy-card__icon {
  font-size: var(--font-size-xl);
  color: var(--color-brand);
}
.academy-card__icon--inline {
  font-size: var(--font-size-2xl);
}
.academy-card--path {
  background: var(--gradient-surface);
}

.academy-more {
  margin-top: var(--space-5);
  font-weight: var(--font-weight-medium);
}
.academy-more a {
  text-decoration: none;
}

/* ---- Pills / badges ---- */
.academy-pill {
  display: inline-block;
  padding: 0.15rem var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
}
.academy-pill--beginner {
  background: color-mix(in srgb, var(--color-success) 16%, transparent);
  color: var(--color-success);
}
.academy-pill--intermediate {
  background: color-mix(in srgb, var(--color-warning) 16%, transparent);
  color: var(--color-warning);
}
.academy-pill--advanced {
  background: color-mix(in srgb, var(--color-error) 14%, transparent);
  color: var(--color-error);
}
.academy-pill--featured {
  background: color-mix(in srgb, var(--color-brand) 16%, transparent);
  color: var(--color-brand);
}

/* ---- Catalog header + filters ---- */
.academy-catalog__header {
  padding: var(--space-6) 0 var(--space-5);
}
.academy-catalog__header h1 {
  margin-bottom: var(--space-2);
}
.academy-filter {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.academy-filter__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  margin-right: var(--space-1);
}
.academy-chip {
  padding: var(--space-1) var(--space-3);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    color var(--transition-fast);
}
.academy-chip:hover {
  border-color: var(--color-brand);
}
.academy-chip--active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-brand-contrast);
}
.academy-chip:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.academy-empty {
  padding: var(--space-6) 0;
  color: var(--color-text-muted);
}

/* ---- Detail (course + path) ---- */
.academy-detail__header {
  padding: var(--space-5) 0 var(--space-4);
}
.academy-detail__badges {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}
.academy-detail__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.academy-prose {
  max-width: var(--layout-content-width-narrow);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
}
.academy-prereq {
  margin-top: var(--space-6);
}
.academy-prereq h2 {
  font-size: var(--font-size-xl);
}

/* ---- Curriculum ---- */
.academy-curriculum {
  margin-top: var(--space-7);
}
.academy-modules {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-4);
}
.academy-module {
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: var(--color-surface);
}
.academy-module__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}
.academy-module__num {
  font-family: var(--font-mono);
  font-size: var(--font-size-lg);
  color: var(--color-brand);
  font-weight: var(--font-weight-bold);
}
.academy-module__title {
  font-size: var(--font-size-lg);
  margin: 0;
}
.academy-module__summary {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: var(--space-1) 0 0;
}
.academy-lessons {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.academy-lesson-row a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text);
  border-top: var(--border-width) solid var(--color-border);
  transition: background var(--transition-fast);
}
.academy-lesson-row:first-child a {
  border-top: none;
}
.academy-lesson-row a:hover {
  background: var(--color-surface-2);
}
.academy-lesson-row__type {
  color: var(--color-brand);
}
.academy-lesson-row__title {
  flex: 1;
}
.academy-lesson-row__time {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- Tags ---- */
.academy-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0;
}
.academy-tags__item {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
.academy-detail__tags {
  margin-top: var(--space-7);
}

/* ---- Lesson viewer ---- */
.academy-lesson {
  padding: var(--space-5) 0 var(--space-8);
}
.academy-lesson__header {
  margin-bottom: var(--space-5);
}
.academy-lesson__kicker {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-brand);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}
.academy-lesson__video {
  margin: var(--space-4) 0;
}
.academy-lesson__body {
  max-width: var(--layout-content-width-narrow);
  color: var(--color-text);
}
.academy-lesson__links {
  margin-top: var(--space-6);
  max-width: var(--layout-content-width-narrow);
}
.academy-lesson__links ul {
  padding-left: var(--space-5);
}

/* ---- Markdown blocks ---- */
.md-h {
  line-height: var(--line-height-snug);
  margin: var(--space-6) 0 var(--space-3);
}
.md-h1 {
  font-size: var(--font-size-2xl);
}
.md-h2 {
  font-size: var(--font-size-xl);
}
.md-h3 {
  font-size: var(--font-size-lg);
}
.md-h4 {
  font-size: var(--font-size-base);
}
.md-p {
  margin: 0 0 var(--space-4);
  line-height: var(--line-height-normal);
}
.md-list {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-6);
  line-height: var(--line-height-normal);
}
.md-list li {
  margin-bottom: var(--space-2);
}
.md-quote {
  margin: 0 0 var(--space-4);
  padding: var(--space-2) var(--space-5);
  border-left: var(--border-width-thick) solid var(--color-brand);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
}
.md-hr {
  border: none;
  border-top: var(--border-width) solid var(--color-border);
  margin: var(--space-6) 0;
}
.md-inline-code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
}
.md-code {
  margin: 0 0 var(--space-4);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
}
.md-code__lang {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-bottom: var(--border-width) solid var(--color-border);
  background: var(--color-surface-2);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}
.md-code__pre {
  margin: 0;
  padding: var(--space-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

/* ---- Learning-path steps ---- */
.academy-path-courses {
  margin-top: var(--space-7);
}
.academy-path-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.academy-path-step {
  display: flex;
  align-items: stretch;
  gap: var(--space-4);
}
.academy-path-step__num {
  flex: none;
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-brand);
  color: var(--color-brand-contrast);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
}
.academy-path-step__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}
.academy-path-step__body:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-sm);
}
.academy-path-step__title {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
}
.academy-path-step__summary {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.academy-path-step__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- Not-found ---- */
.academy-notfound {
  padding: var(--space-8) 0;
  text-align: center;
  max-width: var(--layout-content-width-narrow);
  margin-inline: auto;
}
.academy-notfound .cta-row {
  justify-content: center;
  margin-top: var(--space-5);
}

/* ---- Progress bar ---- */
.academy-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.academy-progress__track {
  flex: 1;
  height: 0.5rem;
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.academy-progress__fill {
  height: 100%;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}
.academy-progress__label {
  flex: none;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}
.academy-detail__progress {
  margin-top: var(--space-4);
  max-width: 28rem;
}

/* ---- Learner controls (on a lesson) ---- */
.academy-learner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}
.academy-learner--anon {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.academy-learner--anon p {
  margin: 0;
}
.academy-learner__done {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: var(--font-weight-semibold);
  color: var(--color-success);
}
.academy-learner__loading {
  color: var(--color-text-muted);
}

/* ---- Student dashboard ---- */
.academy-dash__header {
  padding: var(--space-6) 0 var(--space-5);
}
.academy-dash__header h1 {
  margin-bottom: var(--space-2);
}
.academy-dash__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.academy-stat {
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
}
.academy-stat__value {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  color: var(--color-brand);
}
.academy-stat__unit {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}
.academy-stat__label {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.academy-continue {
  margin-bottom: var(--space-6);
}
.academy-continue__kicker {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: var(--space-2);
}
.academy-continue__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-5);
  background: var(--gradient-surface);
  border: var(--border-width) solid var(--color-brand);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition-fast);
}
.academy-continue__card:hover {
  box-shadow: var(--shadow-md);
}
.academy-continue__course {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.academy-continue__lesson {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}
.academy-continue__go {
  margin-top: var(--space-2);
  color: var(--color-brand);
  font-weight: var(--font-weight-semibold);
}

.academy-dash__section {
  margin-bottom: var(--space-6);
}
.academy-dash__section h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}
.academy-dash__courses {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.academy-enrollment__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast);
}
.academy-enrollment__body:hover {
  border-color: var(--color-brand);
}
.academy-enrollment__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.academy-enrollment__title {
  font-weight: var(--font-weight-semibold);
}
.academy-dash__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
}
.academy-dash__list a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  border-top: var(--border-width) solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: background var(--transition-fast);
}
.academy-dash__list li:first-child a {
  border-top: none;
}
.academy-dash__list a:hover {
  background: var(--color-surface-2);
}
.academy-dash__list-title {
  flex: 1;
}
.academy-dash__list-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.academy-dash__check {
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}
.academy-dash__empty {
  padding: var(--space-8) 0;
  text-align: center;
  max-width: var(--layout-content-width-narrow);
  margin-inline: auto;
}
.academy-dash__empty .cta-row {
  justify-content: center;
  margin-top: var(--space-5);
}

/* ---- Quizzes: course listing ---- */
.academy-course-quizzes {
  margin-top: var(--space-7);
}
.academy-quiz-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.academy-quiz-row a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast);
}
.academy-quiz-row a:hover {
  border-color: var(--color-brand);
}
.academy-quiz-row__title {
  font-weight: var(--font-weight-semibold);
}
.academy-quiz-row__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- Quiz taking ---- */
.academy-quiz__header {
  padding: var(--space-5) 0 var(--space-4);
}
.academy-quiz__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.academy-quiz__questions {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-width: var(--layout-content-width-narrow);
}
.academy-question {
  padding: var(--space-5);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
}
.academy-question__prompt {
  font-weight: var(--font-weight-medium);
  margin: 0 0 var(--space-4);
}
.academy-question__num {
  color: var(--color-brand);
  font-weight: var(--font-weight-bold);
  margin-right: var(--space-1);
}
.academy-question__choices {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.academy-choice {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.academy-choice:hover {
  border-color: var(--color-border-strong);
}
.academy-question__text {
  width: 100%;
  max-width: 24rem;
  padding: var(--space-3);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-base);
}
.academy-question__slots {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.academy-slot {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.academy-slot__pos {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  width: 1.5rem;
}
.academy-slot__select {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
}
.academy-quiz__error {
  color: var(--color-error);
  margin-bottom: var(--space-3);
}

/* ---- Quiz result / review ---- */
.academy-quiz__result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  border: var(--border-width) solid var(--color-border);
}
.academy-quiz__result.is-pass {
  background: color-mix(in srgb, var(--color-success) 10%, transparent);
  border-color: var(--color-success);
}
.academy-quiz__result.is-fail {
  background: color-mix(in srgb, var(--color-warning) 10%, transparent);
  border-color: var(--color-warning);
}
.academy-quiz__score {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}
.academy-quiz__score-num {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}
.academy-quiz__score-badge {
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  font-size: var(--font-size-sm);
}
.is-pass .academy-quiz__score-badge {
  color: var(--color-success);
}
.is-fail .academy-quiz__score-badge {
  color: var(--color-warning);
}
.academy-quiz__score-detail {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}
.academy-quiz__review {
  max-width: var(--layout-content-width-narrow);
}
.academy-quiz__review ol {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.academy-review {
  padding: var(--space-4) var(--space-5);
  border: var(--border-width) solid var(--color-border);
  border-left-width: var(--border-width-thick);
  border-radius: var(--radius-md);
}
.academy-review.is-right {
  border-left-color: var(--color-success);
}
.academy-review.is-wrong {
  border-left-color: var(--color-error);
}
.academy-review__mark {
  font-weight: var(--font-weight-bold);
  margin-right: var(--space-1);
}
.is-right .academy-review__mark {
  color: var(--color-success);
}
.is-wrong .academy-review__mark {
  color: var(--color-error);
}
.academy-review__prompt {
  font-weight: var(--font-weight-medium);
  margin: 0 0 var(--space-2);
}
.academy-review__answer {
  margin: 0;
  font-size: var(--font-size-sm);
}
.academy-review__explain {
  margin: var(--space-2) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ---- Quiz attempt history ---- */
.academy-quiz__history {
  margin-top: var(--space-7);
  max-width: var(--layout-content-width-narrow);
}
.academy-quiz__history ul {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: flex;
  flex-direction: column;
}
.academy-quiz__attempt {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-2);
  border-top: var(--border-width) solid var(--color-border);
}
.academy-quiz__attempt:first-child {
  border-top: none;
}
.academy-quiz__attempt-score {
  font-weight: var(--font-weight-bold);
  font-variant-numeric: tabular-nums;
  width: 3rem;
}
.academy-quiz__attempt.is-pass .academy-quiz__attempt-verdict {
  color: var(--color-success);
}
.academy-quiz__attempt.is-fail .academy-quiz__attempt-verdict {
  color: var(--color-text-muted);
}
.academy-quiz__attempt-time {
  margin-left: auto;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ---- Coding exercises ---- */
.academy-exercise__problem,
.academy-exercise__code,
.academy-exercise__expected,
.academy-exercise__hints,
.academy-exercise__solution {
  margin-top: var(--space-6);
  max-width: var(--layout-content-width-narrow);
}
.academy-exercise__code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.academy-exercise__code-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}
.academy-exercise__signin {
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.academy-hints {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.academy-hint {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
}
.academy-hint__num {
  flex: none;
  width: 1.5rem;
  height: 1.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-brand);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xs);
}
.academy-exercise__reveal {
  padding: var(--space-5);
  background: var(--color-surface);
  border: var(--border-width) dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  text-align: center;
}
.academy-exercise__reveal p {
  margin: 0 0 var(--space-3);
}

/* ---- Certificates ---- */
.academy-dash__links {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.academy-dash__link {
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

/* ---- Achievements ---- */
.academy-badges {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-4);
}
.academy-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  padding: var(--space-5);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.academy-badge.is-earned {
  border-color: var(--color-brand);
  background: var(--gradient-surface);
}
.academy-badge.is-locked {
  opacity: 0.65;
}
.academy-badge__icon {
  font-size: 2.5rem;
  line-height: 1;
  width: 4rem;
  height: 4rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
}
.academy-badge.is-earned .academy-badge__icon {
  background: color-mix(in srgb, var(--color-brand) 14%, transparent);
}
.academy-badge__title {
  font-size: var(--font-size-lg);
  margin: var(--space-1) 0 0;
}
.academy-badge__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}
.academy-badge__status {
  margin: var(--space-2) 0 0;
  font-size: var(--font-size-xs);
}
.academy-badge__earned {
  color: var(--color-brand);
  font-weight: var(--font-weight-semibold);
}
.academy-badge__locked {
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}
.academy-cert-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}
.academy-cert-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.academy-cert-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* The branded certificate. A fixed aspect landscape card with a gradient border. */
.academy-cert {
  container-type: inline-size;
}
.academy-cert__frame {
  position: relative;
  padding: var(--space-7) var(--space-6);
  text-align: center;
  color: #0b0e1a;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  background-image: linear-gradient(#ffffff, #ffffff), linear-gradient(120deg, #2f80f0, #6c3ce0);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: var(--shadow-md);
}
.academy-cert__head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.academy-cert__mark .zx-mark {
  display: block;
  border-radius: var(--radius-md);
}
.academy-cert__issuer {
  display: flex;
  flex-direction: column;
  text-align: left;
}
.academy-cert__issuer-name {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: #0b0e1a;
}
.academy-cert__issuer-org {
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: #6c3ce0;
}
.academy-cert__eyebrow {
  font-size: var(--font-size-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #6c3ce0;
  margin-bottom: var(--space-4);
}
.academy-cert__presented {
  color: #4a4a5a;
  margin: var(--space-2) 0;
  font-size: var(--font-size-sm);
}
.academy-cert__name {
  font-size: var(--font-size-3xl);
  line-height: 1.1;
  color: #0b0e1a;
  margin: var(--space-2) 0;
}
.academy-cert__course {
  font-size: var(--font-size-xl);
  color: #2f80f0;
  margin: var(--space-2) 0 0;
}
.academy-cert__release {
  color: #6b6b80;
  font-size: var(--font-size-sm);
  margin-top: var(--space-2);
}
.academy-cert__foot {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid #e2e2ec;
}
.academy-cert__foot-item {
  display: flex;
  flex-direction: column;
  text-align: left;
}
.academy-cert__foot-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: #6b6b80;
}
.academy-cert__foot-value {
  font-weight: var(--font-weight-semibold);
  color: #0b0e1a;
}
.academy-cert__id {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}
.academy-cert__verify {
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  color: #6b6b80;
}
.academy-cert__verify-url {
  font-family: var(--font-mono);
  word-break: break-all;
}

/* Public verification banner */
.academy-verify-banner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
  border: var(--border-width) solid var(--color-border);
}
.academy-verify-banner.is-valid {
  background: color-mix(in srgb, var(--color-success) 10%, transparent);
  border-color: var(--color-success);
}
.academy-verify-banner.is-invalid {
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
  border-color: var(--color-error);
}
.academy-verify-banner__mark {
  flex: none;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: #fff;
}
.is-valid .academy-verify-banner__mark {
  background: var(--color-success);
}
.is-invalid .academy-verify-banner__mark {
  background: var(--color-error);
}
.academy-verify-banner__title {
  font-weight: var(--font-weight-semibold);
  margin: 0;
}
.academy-verify-banner__sub {
  margin: var(--space-1) 0 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Print: isolate the chosen certificate so save-as-PDF yields just the certificate. */
@media print {
  body.is-printing-cert * {
    visibility: hidden;
  }
  body.is-printing-cert .print-target .academy-cert,
  body.is-printing-cert .print-target .academy-cert * {
    visibility: visible;
  }
  body.is-printing-cert .print-target .academy-cert {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
  }
  body.is-printing-cert .academy-cert__frame {
    box-shadow: none;
  }
}

/* ---- Search ---- */
.academy-search__input {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--font-size-lg);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  margin-bottom: var(--space-5);
}
.academy-search__input:focus-visible {
  outline: none;
  border-color: var(--color-brand);
  box-shadow: var(--shadow-focus);
}
.academy-search__count {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.academy-search__group {
  margin-bottom: var(--space-6);
}
.academy-search__group h2 {
  font-size: var(--font-size-lg);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.academy-search__group-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-normal);
}
.academy-results {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0;
  display: flex;
  flex-direction: column;
}
.academy-result a,
.academy-result--static {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-3);
  border-top: var(--border-width) solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
}
.academy-result:first-child a,
.academy-result--static:first-child {
  border-top: none;
}
.academy-result a:hover {
  background: var(--color-surface-2);
}
.academy-result__title {
  font-weight: var(--font-weight-medium);
}
.academy-result__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ---- Instructor portal ---- */
.academy-instr-new {
  margin: var(--space-5) 0;
}
.academy-instr-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 40rem;
  padding: var(--space-5);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  margin-bottom: var(--space-5);
}
.academy-instr-form--inline {
  margin: var(--space-3) 0;
  background: var(--color-bg);
}
.academy-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.academy-field__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}
.academy-field__input {
  padding: var(--space-2) var(--space-3);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-family: inherit;
}
.academy-field__input:focus-visible {
  outline: none;
  border-color: var(--color-brand);
  box-shadow: var(--shadow-focus);
}
.academy-field__textarea {
  resize: vertical;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}
.academy-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
}
.academy-instr-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.academy-instr-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  flex-wrap: wrap;
}
.academy-instr-row__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 12rem;
}
.academy-instr-row__title {
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  color: var(--color-text);
}
.academy-instr-row__title:hover {
  color: var(--color-brand);
}
.academy-instr-row__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.academy-instr-row__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.academy-reorder {
  display: inline-flex;
  gap: var(--space-1);
}
.academy-lesson-row--instr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-2);
  border-top: var(--border-width) solid var(--color-border);
}
.academy-add-lesson {
  margin-top: var(--space-3);
}
.academy-analytics__searches {
  margin-top: var(--space-4);
}
.academy-analytics__searches ul {
  list-style: none;
  padding: 0;
  margin: var(--space-2) 0 0;
}
.academy-analytics__searches li {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-1) 0;
}

/* ---- Sign-in required ---- */
.academy-signin {
  padding: var(--space-8) 0;
  text-align: center;
  max-width: var(--layout-content-width-narrow);
  margin-inline: auto;
}
.academy-signin .cta-row {
  justify-content: center;
  margin-top: var(--space-5);
}

@media (max-width: 40rem) {
  .academy-grid {
    grid-template-columns: 1fr;
  }
  .academy-path-step {
    gap: var(--space-3);
  }
}

/* ============================================================================
   Phase 0 — shared Academy chrome & state primitives.
   Every rule references a design token (theme-aware) and is scoped to an
   `academy-`/state class so it cannot leak into the marketing surface.
   ========================================================================== */

/* ---- Academy section bar (AcademyTopBar) ---- */
.academy-nav {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: var(--z-base);
}
.academy-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: 3rem;
  flex-wrap: wrap;
}
.academy-nav__brand {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}
.academy-nav__sections {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
}
.academy-nav__link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.academy-nav__link:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.academy-nav__link--active {
  color: var(--color-brand);
  background: var(--color-surface-2);
}
/* Disclosure groups (My Learning) — native <details> */
.academy-nav__group {
  position: relative;
}
.academy-nav__summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}
.academy-nav__summary::-webkit-details-marker {
  display: none;
}
.academy-nav__summary::after {
  content: " ▾";
  color: var(--color-text-muted);
}
.academy-nav__group--active > .academy-nav__summary {
  color: var(--color-brand);
}
.academy-nav__menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2);
  min-width: 12rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}
/* On wide screens the menu floats; on narrow it flows inline. */
@media (min-width: 48rem) {
  .academy-nav__group[open] .academy-nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-header);
    margin-top: var(--space-1);
  }
}

/* Breadcrumbs are styled canonically in components.css (the shared common/Breadcrumbs). */

/* ---- Quiz question fieldset (groups a prompt with its inputs for assistive tech) ---- */
.academy-question__fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-inline-size: 0;
}
.academy-question__fieldset > .academy-question__prompt {
  display: block;
  width: 100%;
  padding: 0;
}

/* ---- Facets ---- */
.facet-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-4);
  margin: var(--space-5) 0;
}
.facet-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.facet-group__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide, 0.04em);
  color: var(--color-text-muted);
}
.facet-group__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.facet-chip {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.facet-chip:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.facet-chip--active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-on-brand);
}
.facet-bar__clear {
  align-self: center;
  background: none;
  border: none;
  color: var(--color-link);
  font-size: var(--font-size-sm);
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
}

/* ---- Rail (horizontal scroller) ---- */
.rail {
  margin: var(--space-7) 0;
}
.rail__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.rail__title {
  font-size: var(--font-size-xl);
  margin: 0;
}
.rail__controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.rail__more {
  color: var(--color-link);
  text-decoration: none;
  font-size: var(--font-size-sm);
  white-space: nowrap;
}
.rail__btn {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  line-height: 1;
}
.rail__btn:hover {
  background: var(--color-surface-2);
}
.rail__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(16rem, 1fr);
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: var(--space-2);
}
.rail__item {
  scroll-snap-align: start;
  min-width: 0;
}

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  max-width: 32rem;
  margin-inline: auto;
}
.empty-state__icon {
  font-size: var(--font-size-3xl);
  display: block;
  margin-bottom: var(--space-3);
}
.empty-state__title {
  font-size: var(--font-size-xl);
  margin: 0 0 var(--space-2);
}
.empty-state__message {
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-4);
}

/* ---- Error banner ---- */
.error-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-error);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin: var(--space-5) 0;
}
.error-banner__body {
  flex: 1;
  min-width: 0;
}
.error-banner__title {
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-1);
}
.error-banner__message {
  color: var(--color-text-secondary);
  margin: 0;
}
.error-banner__ref {
  margin: var(--space-2) 0 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.error-banner__retry {
  flex: none;
}

/* ---- Skeletons ---- */
.skeleton {
  display: block;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}
.skeleton--line {
  height: 0.75rem;
  margin-bottom: var(--space-2);
}
.skeleton--block {
  width: 100%;
  border-radius: var(--radius-md);
}
.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--color-border) 60%, transparent),
    transparent
  );
  animation: skeleton-shimmer 1.4s infinite;
}
.skeleton-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  background: var(--color-surface);
}
.skeleton-card__body {
  padding: var(--space-3) var(--space-1) var(--space-1);
}
@keyframes skeleton-shimmer {
  to {
    transform: translateX(100%);
  }
}
@media (prefers-reduced-motion: reduce) {
  .skeleton::after {
    animation: none;
  }
}

/* ============================================================================
   Phase 1 — lesson viewer content fidelity (callouts, tables, code, TOC).
   ========================================================================== */

/* ---- Lesson 2-column layout (content + sticky TOC) ---- */
.academy-lesson-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
.academy-lesson__aside {
  display: none;
}
@media (min-width: 64rem) {
  .academy-lesson-layout {
    grid-template-columns: minmax(0, 1fr) 15rem;
  }
  .academy-lesson__aside {
    display: block;
  }
}
.academy-lesson {
  min-width: 0;
}

/* ---- Reading progress ---- */
.reading-progress {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: 3px;
  background: transparent;
}
.reading-progress__bar {
  display: block;
  height: 100%;
  background: var(--color-brand);
  width: 0;
  transition: width var(--transition-fast) linear;
}
@media (prefers-reduced-motion: reduce) {
  .reading-progress__bar {
    transition: none;
  }
}

/* ---- Table of contents ---- */
.lesson-toc {
  position: sticky;
  top: var(--space-6);
  font-size: var(--font-size-sm);
}
.lesson-toc__title {
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-2);
}
.lesson-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--color-border);
}
.lesson-toc__item--l3 {
  padding-left: var(--space-3);
}
.lesson-toc__link {
  display: block;
  padding: var(--space-1) var(--space-3);
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--color-text-secondary);
  text-decoration: none;
  line-height: var(--line-height-snug, 1.4);
}
.lesson-toc__link:hover {
  color: var(--color-text);
}
.lesson-toc__link--active {
  color: var(--color-brand);
  border-left-color: var(--color-brand);
  font-weight: var(--font-weight-medium);
}

/* ---- Code block toolbar (copy + playground) ---- */
.md-code {
  margin: var(--space-5) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.md-code__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}
.md-code__lang {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.md-code__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.md-code__playground {
  font-size: var(--font-size-xs);
  color: var(--color-link);
  text-decoration: none;
  white-space: nowrap;
}
.md-code__copy {
  font-size: var(--font-size-xs);
  font-family: var(--font-mono);
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
}
.md-code__copy:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.md-code__pre {
  margin: 0;
  padding: var(--space-3);
  overflow-x: auto;
  background: var(--color-surface);
}

/* ---- Diagram (mermaid) fallback ---- */
.md-diagram {
  margin: var(--space-5) 0;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  background: var(--color-surface-2);
}
.md-diagram__cap {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.md-diagram__src {
  margin: 0;
  overflow-x: auto;
  font-size: var(--font-size-sm);
}
.md-diagram__note {
  margin: var(--space-2) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ---- Callouts ---- */
.callout {
  margin: var(--space-5) 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
}
.callout__label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-2);
}
.callout__body > p {
  margin: 0 0 var(--space-2);
}
.callout__body > p:last-child {
  margin-bottom: 0;
}
.callout--note {
  border-left-color: var(--color-brand);
  background: color-mix(in srgb, var(--color-brand) 6%, var(--color-surface));
}
.callout--tip {
  border-left-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 8%, var(--color-surface));
}
.callout--warning {
  border-left-color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 10%, var(--color-surface));
}
.callout--important {
  border-left-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface));
}

/* ---- Tables ---- */
.md-table-wrap {
  overflow-x: auto;
  margin: var(--space-5) 0;
}
.md-table {
  border-collapse: collapse;
  width: 100%;
  font-size: var(--font-size-sm);
}
.md-table th,
.md-table td {
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  text-align: left;
}
.md-table th {
  background: var(--color-surface-2);
  font-weight: var(--font-weight-semibold);
}

/* ---- Browse ---- */
.academy-browse__section {
  margin: var(--space-6) 0;
}
.academy-browse__tile {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  text-decoration: none;
  color: inherit;
}
.academy-browse__icon {
  font-size: var(--font-size-2xl);
}
.academy-browse__tile-title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}
.academy-browse__tile-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.academy-browse__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
a.facet-chip {
  text-decoration: none;
}

/* ---- Course detail: CTA + completion banner ---- */
.academy-detail__cta {
  margin-top: var(--space-5);
}
.academy-complete-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-success) 8%, var(--color-surface));
}
.academy-complete-banner__icon {
  font-size: var(--font-size-xl);
}
.academy-complete-banner__text {
  margin: 0;
  flex: 1;
  min-width: 12rem;
  font-weight: var(--font-weight-medium);
}

/* ---- Course 2-column layout with the outline rail ---- */
.academy-course-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
.academy-course__main {
  min-width: 0;
}
/* The rail is a supplementary sticky nav; the main column carries the full curriculum,
   so the rail is desktop-only (hidden where it would just repeat the content). */
.academy-course__rail {
  display: none;
}
@media (min-width: 64rem) {
  .academy-course-layout {
    grid-template-columns: 16rem minmax(0, 1fr);
  }
  .academy-course__rail {
    display: block;
  }
}

/* ---- Outline rail ---- */
.outline-rail {
  position: sticky;
  top: var(--space-6);
  font-size: var(--font-size-sm);
  max-height: calc(100vh - var(--space-8));
  overflow-y: auto;
}
.outline-rail__module {
  margin-bottom: var(--space-3);
}
.outline-rail__module-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  padding: var(--space-1) 0;
  list-style: none;
}
.outline-rail__module-title::-webkit-details-marker {
  display: none;
}
.outline-rail__num {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.outline-rail__lessons {
  list-style: none;
  margin: var(--space-1) 0 0;
  padding: 0;
  border-left: 1px solid var(--color-border);
}
.outline-rail__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--color-text-secondary);
  text-decoration: none;
}
.outline-rail__link:hover {
  color: var(--color-text);
}
.outline-rail__link--current {
  color: var(--color-brand);
  border-left-color: var(--color-brand);
  font-weight: var(--font-weight-medium);
}
.outline-rail__link--done .outline-rail__tick {
  color: var(--color-success);
}
.outline-rail__tick {
  flex: none;
  width: 1rem;
  text-align: center;
  color: var(--color-text-muted);
}
.outline-rail__lesson-title {
  min-width: 0;
}

/* ============================================================================
   Phase 3 — personal surfaces (stats, streak, continue, bookmarks, profile).
   ========================================================================== */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: var(--space-3);
}
.stat-tile {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.stat-tile__icon {
  font-size: var(--font-size-xl);
}
.stat-tile__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}
.stat-tile__unit {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-secondary);
}
.stat-tile__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-warning) 14%, var(--color-surface));
  font-weight: var(--font-weight-medium);
}

/* Continue card */
.continue-card {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-5);
  margin: var(--space-5) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.continue-card:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-md);
}
.continue-card__kicker {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.continue-card__course {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.continue-card__lesson {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}
.continue-card__go {
  color: var(--color-brand);
  font-weight: var(--font-weight-medium);
}

/* Activity feed */
.activity-feed {
  list-style: none;
  margin: 0;
  padding: 0;
}
.activity-feed__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
}
.activity-feed__link:hover .activity-feed__title {
  color: var(--color-brand);
}
.activity-feed__badge {
  flex: none;
  font-size: var(--font-size-xs);
  color: var(--color-success);
}

/* Bookmarks */
.academy-bookmarks {
  list-style: none;
  margin: var(--space-5) 0;
  padding: 0;
}
.academy-bookmark {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.academy-bookmark__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}
.academy-bookmark__title {
  font-weight: var(--font-weight-medium);
}
.academy-bookmark__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.academy-bookmark__remove {
  flex: none;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
}
.academy-bookmark__remove:hover {
  color: var(--color-error);
  border-color: var(--color-error);
}

/* Profile */
.academy-profile__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-5) 0;
}
.academy-profile__avatar {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex: none;
}
.academy-profile__avatar--placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
}
.academy-profile__since {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}
.academy-profile__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Settings */
.academy-settings__section {
  margin: var(--space-5) 0;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.academy-settings__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.academy-settings__label {
  font-weight: var(--font-weight-medium);
}

/* ============================================================================
   Phase 4 — learning-path map.
   ========================================================================== */
.academy-path__progress {
  margin: var(--space-4) 0 var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.path-map {
  list-style: none;
  margin: var(--space-5) 0;
  padding: 0;
}
.path-map__step {
  position: relative;
  padding-left: 3.5rem;
  padding-bottom: var(--space-4);
}
/* The connector line between nodes. */
.path-map__step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 2.75rem;
  bottom: -0.25rem;
  width: 2px;
  background: var(--color-border);
}
.path-map__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
}
.path-map__step--done .path-map__marker {
  background: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-on-brand, #fff);
}
.path-map__step--current .path-map__marker {
  border-color: var(--color-brand);
  color: var(--color-brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-brand) 20%, transparent);
}
.path-map__body {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.path-map__body:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-sm);
}
.path-map__step--current .path-map__body {
  border-color: var(--color-brand);
}
.path-map__title {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
}
.path-map__summary {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.path-map__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-1);
}
.path-map__tag {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-brand);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.path-map__progress {
  margin-top: var(--space-2);
}

/* ============================================================================
   Phase 5 — instructor analytics & admin console.
   ========================================================================== */
.admin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin: var(--space-5) 0;
}
@media (min-width: 48rem) {
  .admin-layout {
    grid-template-columns: 12rem minmax(0, 1fr);
  }
}
.admin-main {
  min-width: 0;
}
.admin-sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}
@media (min-width: 48rem) {
  .admin-sidebar__list {
    flex-direction: column;
    position: sticky;
    top: var(--space-6);
  }
}
.admin-sidebar__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
}
.admin-sidebar__link:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.admin-sidebar__link--active {
  background: var(--color-surface-2);
  color: var(--color-brand);
  font-weight: var(--font-weight-medium);
}

/* Data table */
.data-table-wrap {
  overflow-x: auto;
  margin: var(--space-3) 0;
}
.data-table {
  border-collapse: collapse;
  width: 100%;
  font-size: var(--font-size-sm);
}
.data-table__caption {
  text-align: left;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}
.data-table th,
.data-table td {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  text-align: left;
}
.data-table th {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}

/* Endpoint-pending placeholder */
.endpoint-pending {
  padding: var(--space-4);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
}
.endpoint-pending__title {
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-2);
}
.endpoint-pending__body {
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-3);
}
.endpoint-pending__contract {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

/* ============================================================================
   Modern reading experience (restyle pass).
   A spacious, calm, highly readable learning surface layered on the tokens.
   Scoped to Academy prose/lesson surfaces + long-form docs; overrides the
   earlier density-oriented rules by appearing later at equal specificity.
   No new framework, no token duplication, no route/markup changes.
   ========================================================================== */

/* ---- Long-form prose: comfortable measure + type ---- */
.academy-prose {
  max-width: var(--reading-measure);
  font-size: var(--reading-font-size);
  line-height: var(--reading-line-height);
  color: var(--color-text);
}
.academy-lesson__body {
  max-width: var(--reading-measure);
}
.academy-prose .md-p {
  margin: 0 0 var(--space-5);
  line-height: var(--reading-line-height);
}
.academy-prose .md-list {
  margin: 0 0 var(--space-5);
  padding-left: var(--space-6);
  line-height: var(--reading-line-height);
}
.academy-prose .md-list li {
  margin-bottom: var(--space-3);
}
.academy-prose .md-quote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  font-size: var(--reading-font-size);
  border-radius: var(--radius-md);
}
.academy-prose .md-hr {
  margin: var(--space-8) 0;
}

/* ---- Headings: larger, with clear section separation ---- */
.academy-prose .md-h {
  margin: var(--space-7) 0 var(--space-4);
  line-height: var(--line-height-snug);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
}
.academy-prose .md-h1 {
  font-size: var(--reading-h1);
}
.academy-prose .md-h2 {
  font-size: var(--reading-h2);
  padding-top: var(--space-5);
  border-top: var(--border-width) solid var(--color-border);
}
.academy-prose .md-h3 {
  font-size: var(--reading-h3);
}
.academy-prose .md-h4 {
  font-size: var(--font-size-lg);
}
/* The first block never carries a big top gap or divider. */
.academy-prose > .md-h:first-child {
  margin-top: 0;
}
.academy-prose > .md-h2:first-child {
  border-top: none;
  padding-top: 0;
}

/* ---- Lesson shell: generous vertical rhythm + strong title hierarchy ---- */
.academy-lesson {
  padding: var(--space-7) 0 var(--space-9);
}
.academy-lesson__header {
  margin-bottom: var(--space-7);
}
.academy-lesson__header h1 {
  font-size: var(--reading-h1);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin: 0 0 var(--space-3);
  max-width: var(--reading-measure);
}
.academy-lesson__header .lead {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
  max-width: var(--reading-measure);
  margin: 0;
}

/* ---- Code: a first-class element (bigger, roomier, in both themes) ---- */
.md-code {
  margin: var(--space-6) 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.md-code__pre {
  padding: var(--space-5);
  font-size: var(--font-size-base);
  line-height: 1.7;
}
.md-code__bar {
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-4);
}
.academy-prose .md-inline-code {
  font-size: 0.875em;
  padding: 0.15em 0.4em;
}

/* ---- Callouts: roomier, clearly semantic ---- */
.callout {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--reading-font-size);
  line-height: var(--reading-line-height);
}
.callout__label {
  margin-bottom: var(--space-3);
}

/* ---- Tables: readable ---- */
.md-table-wrap {
  margin: var(--space-6) 0;
}
.md-table {
  font-size: var(--font-size-base);
}
.md-table th,
.md-table td {
  padding: var(--space-3) var(--space-4);
}

/* ---- Lesson layout: a wide, screen-filling reading area ----
   The lesson uses its own wide shell (not the 72rem content container), so on a large screen a
   comfortable prose column and the TOC sit together and use the width — centered as a group with
   generous gutters rather than squeezed into a narrow strip. */
.academy-lesson-shell {
  max-width: 86rem;
}
@media (min-width: 64rem) {
  .academy-lesson-layout {
    grid-template-columns: minmax(0, 52rem) minmax(0, 19rem);
    gap: var(--space-8);
    justify-content: center;
  }
  /* Prose fills the wider column (override the 44rem card-summary measure for the lesson body). */
  .academy-lesson__body,
  .academy-lesson__header h1,
  .academy-lesson__header .lead {
    max-width: none;
  }
}
@media (min-width: 100rem) {
  .academy-lesson-layout {
    grid-template-columns: minmax(0, 56rem) minmax(0, 20rem);
    gap: var(--space-9);
  }
}

/* ---- "On this page": a polished, sticky, scrollable TOC ---- */
.lesson-toc {
  top: calc(var(--layout-header-height) + var(--space-5));
  max-height: calc(100vh - var(--layout-header-height) - var(--space-7));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: var(--space-2);
}
.lesson-toc__title {
  font-size: var(--font-size-xs);
  margin-bottom: var(--space-3);
}
.lesson-toc__link {
  padding: var(--space-2) var(--space-4);
  line-height: var(--line-height-snug);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast);
}
.lesson-toc__link:hover {
  background: var(--color-surface);
  color: var(--color-text);
}
/* Active state is signalled three ways (weight + surface + left rule), never colour alone. */
.lesson-toc__link--active {
  background: color-mix(in srgb, var(--color-brand) 8%, transparent);
  border-left-color: var(--color-brand);
  color: var(--color-brand);
  font-weight: var(--font-weight-semibold);
}
.lesson-toc__item--l3 .lesson-toc__link {
  padding-left: var(--space-6);
  font-size: var(--font-size-xs);
}
@media (prefers-reduced-motion: reduce) {
  .lesson-toc__link {
    transition: none;
  }
}

/* ---- Mobile "On this page": a collapsed, accessible <details> disclosure ----
   Shown only < 64rem (where the sticky sidebar has no room); the desktop sidebar
   stays hidden on mobile, so exactly one TOC shows at any width. */
.lesson-toc-m {
  display: none;
}
@media (max-width: 63.999rem) {
  .lesson-toc-m {
    display: block;
    margin: 0 0 var(--space-6);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
  }
}
.lesson-toc-m__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 3rem;
  padding: var(--space-3) var(--space-4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
}
.lesson-toc-m__summary::-webkit-details-marker {
  display: none;
}
.lesson-toc-m__chevron {
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}
.lesson-toc-m[open] .lesson-toc-m__chevron {
  transform: rotate(180deg);
}
@media (prefers-reduced-motion: reduce) {
  .lesson-toc-m__chevron {
    transition: none;
  }
}
.lesson-toc-m__list {
  margin: 0;
  padding: var(--space-1) var(--space-3) var(--space-3);
  border-top: var(--border-width) solid var(--color-border);
}

/* ============================================================================
   Learner orientation (restyle §10) — clear hierarchy for "Where am I? / What
   am I learning? / How far? / What's next?" on course, module, and path headers.
   ========================================================================== */

/* Title first, then a scannable FACTS BAR (not a muted equal-weight run-on),
   then progress. Bordered strip with subtle dividers between facts. */
.academy-detail__header h1 {
  font-size: var(--reading-h1);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin: 0;
}
.academy-detail__header .lead {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
  max-width: 60ch;
  margin: var(--space-3) 0 0;
}
.academy-detail__meta {
  margin-top: var(--space-5);
  padding: var(--space-3) 0;
  border-block: var(--border-width) solid var(--color-border);
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  gap: var(--space-4);
}
.academy-detail__meta > * {
  display: inline-flex;
  align-items: center;
}
.academy-detail__meta > * + * {
  padding-left: var(--space-4);
  border-left: var(--border-width) solid var(--color-border);
}

/* "How far am I?" — give the progress bar room to read as its own step. */
.academy-detail__progress {
  margin-top: var(--space-5);
}

/* "What do I need first?" — prerequisites as a distinct, calm callout. */
.academy-prereq {
  margin-top: var(--space-7);
  padding: var(--space-4) var(--space-5);
  border: var(--border-width) solid var(--color-border);
  border-left: 4px solid var(--color-brand);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}
.academy-prereq h2 {
  font-size: var(--font-size-lg);
  margin: 0 0 var(--space-2);
}
.academy-prereq h2::before {
  content: "✓";
  display: inline-block;
  margin-right: var(--space-2);
  color: var(--color-brand);
  font-weight: var(--font-weight-bold);
}
.academy-prereq p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* ============================================================================
   Surfaces (restyle §9) — calm, layered, generous. A reading environment, not a
   dashboard of floating rounded rectangles: subtle borders, restrained hover,
   consistent radii, roomy padding. Lesson prose stays card-free (only code,
   callouts, and tables are boxed).
   ========================================================================== */

/* Module cards: generous padding + a readable summary. */
.academy-module {
  padding: var(--space-6);
}
.academy-module__summary {
  font-size: var(--font-size-base);
  margin-top: var(--space-2);
}
.stat-tile {
  padding: var(--space-5);
}

/* Interactive cards lift gently and show a clear focus ring, matching .card. */
.academy-card:hover {
  box-shadow: var(--shadow-md);
}
.academy-card:focus-within {
  border-color: var(--color-brand);
}
@media (prefers-reduced-motion: reduce) {
  .academy-card:hover {
    transform: none;
  }
}

/* ---- Previous / next lesson pager (§10 "what's next?") ---- */
.lesson-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: var(--border-width) solid var(--color-border);
  max-width: var(--reading-measure);
}
.lesson-pager__spacer {
  display: block;
}
.lesson-pager__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-5);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-decoration: none;
  color: var(--color-text);
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}
.lesson-pager__link:hover {
  transform: translateY(-2px);
  border-color: var(--color-brand);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}
.lesson-pager__link--next {
  text-align: right;
  align-items: flex-end;
}
.lesson-pager__dir {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}
.lesson-pager__title {
  font-weight: var(--font-weight-semibold);
}
@media (prefers-reduced-motion: reduce) {
  .lesson-pager__link:hover {
    transform: none;
  }
}
@media (max-width: 40rem) {
  .lesson-pager {
    grid-template-columns: 1fr;
  }
  .lesson-pager__spacer {
    display: none;
  }
  .lesson-pager__link--next {
    text-align: left;
    align-items: flex-start;
  }
}