:root {
  --lesson-bg: #f1ece2;
  --lesson-bg-deep: #e7dcc8;
  --lesson-surface: rgba(255, 252, 246, 0.9);
  --lesson-surface-strong: rgba(255, 249, 239, 0.98);
  --lesson-ink: #1d1410;
  --lesson-muted: rgba(29, 20, 16, 0.68);
  --lesson-line: rgba(29, 20, 16, 0.12);
  --lesson-line-strong: rgba(29, 20, 16, 0.2);
  --lesson-accent: #8a4328;
  --lesson-gold: #c49a52;
  --lesson-shadow: 0 24px 70px rgba(29, 20, 16, 0.09), 0 10px 28px rgba(29, 20, 16, 0.06);
  --lesson-serif: "Fraunces", Georgia, serif;
  --lesson-mono: "IBM Plex Mono", "Courier New", monospace;
  --lesson-ui: "DM Sans", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body.lesson-body {
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.72), transparent 38%),
    linear-gradient(180deg, var(--lesson-bg), var(--lesson-bg-deep));
  color: var(--lesson-ink);
  font-family: var(--lesson-ui);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.lesson-page {
  width: min(100% - 48px, 1180px);
  margin: 0 auto;
  padding: 34px 0 52px;
}

.lesson-nav,
.lesson-nav__links,
.lesson-hero__actions,
.lesson-footer,
.lesson-footer__links,
.lesson-breadcrumbs {
  display: flex;
  align-items: center;
}

.lesson-nav,
.lesson-footer {
  justify-content: space-between;
  gap: 20px;
}

.lesson-nav {
  margin-bottom: 28px;
}

.lesson-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--lesson-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lesson-brand img {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  box-shadow: 0 12px 24px rgba(29, 20, 16, 0.08);
}

.lesson-nav__links,
.lesson-footer__links,
.lesson-hero__actions,
.lesson-breadcrumbs {
  gap: 12px;
  flex-wrap: wrap;
}

.lesson-nav__links a:not(.lesson-pill),
.lesson-footer__links a,
.lesson-breadcrumbs {
  font-family: var(--lesson-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lesson-muted);
}

.lesson-breadcrumbs {
  margin: 10px 0 24px;
}

.lesson-breadcrumbs span {
  opacity: 0.62;
}

.lesson-pill,
.lesson-card a,
.lesson-list-card a,
.related-card a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--lesson-line);
  background: rgba(255, 255, 255, 0.62);
  font-family: var(--lesson-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lesson-pill--dark {
  border-color: #111;
  background: #111;
  color: #fff;
}

.lesson-pill--ghost {
  background: rgba(255, 255, 255, 0.38);
}

.lesson-hero,
.article-hero,
.lesson-section,
.lesson-track,
.lesson-card,
.lesson-list-card,
.lesson-identity-card,
.lesson-aside__card,
.related-card {
  border: 1px solid var(--lesson-line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(249, 243, 233, 0.94));
  box-shadow: var(--lesson-shadow);
}

.lesson-hero,
.article-hero,
.lesson-section,
.lesson-track {
  border-radius: 26px;
  padding: clamp(22px, 4vw, 42px);
}

.lesson-card,
.lesson-list-card,
.lesson-identity-card,
.lesson-aside__card,
.related-card {
  border-radius: 8px;
  padding: 22px;
}

.lesson-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 24px;
  align-items: stretch;
}

.lesson-hero--index {
  min-height: 430px;
}

.lesson-hero--solo {
  grid-template-columns: 1fr;
  min-height: auto;
  padding: clamp(36px, 6vw, 80px) clamp(28px, 5vw, 72px);
}

.lesson-hero--solo .lesson-hero__copy {
  max-width: 820px;
}

.lesson-hero__copy,
.lesson-hero__aside,
.lesson-section__heading,
.lesson-track__heading,
.lesson-card,
.lesson-list-card,
.article-hero,
.lesson-aside__card,
.related-card {
  display: grid;
  gap: 14px;
  align-content: start;
}

.lesson-hero__aside,
.lesson-identity-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(239, 226, 204, 0.9));
}

.lesson-kicker,
.lesson-card__kicker,
.lesson-list-card > p,
.related-card > p,
.lesson-aside__card > p:first-child,
.lesson-identity-card dt {
  margin: 0;
  font-family: var(--lesson-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lesson-muted);
}

.lesson-hero h1,
.lesson-hero h2,
.article-hero h1,
.lesson-section h2,
.lesson-track h2,
.lesson-card h2,
.lesson-list-card h3,
.lesson-aside__card h2,
.related-card h3,
.lesson-article h2,
.lesson-article h3 {
  margin: 0;
  font-family: var(--lesson-serif);
  letter-spacing: 0;
  text-wrap: balance;
}

.lesson-hero h1,
.article-hero h1 {
  max-width: 14ch;
  font-size: clamp(44px, 6vw, 82px);
  line-height: 0.96;
}

.lesson-hero h2,
.lesson-section h2,
.lesson-track h2 {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.04;
}

.lesson-card h2,
.lesson-list-card h3,
.related-card h3,
.lesson-aside__card h2 {
  font-size: clamp(24px, 2.7vw, 34px);
  line-height: 1.08;
}

.lesson-hero__lede,
.article-hero p,
.lesson-section p,
.lesson-card p,
.lesson-list-card p,
.lesson-aside__card p,
.related-card p,
.lesson-identity-card dd,
.lesson-article p,
.lesson-article li {
  margin: 0;
  color: var(--lesson-muted);
  line-height: 1.68;
}

.lesson-hero__lede,
.article-hero p {
  max-width: 66ch;
  font-size: clamp(18px, 2vw, 25px);
}

.lesson-grid,
.lesson-list-grid,
.related-grid {
  display: grid;
  gap: 16px;
}

.lesson-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-list-grid,
.related-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lesson-section,
.lesson-track {
  margin-top: 24px;
}

.lesson-card__facts,
.lesson-identity-card dl {
  display: grid;
  gap: 12px;
  margin: 0;
}

.lesson-card__facts div,
.lesson-identity-card div {
  padding-top: 12px;
  border-top: 1px solid var(--lesson-line);
}

.lesson-card__facts dt,
.lesson-card__facts dd,
.lesson-identity-card dt,
.lesson-identity-card dd {
  margin: 0;
}

.lesson-card__facts dt {
  font-family: var(--lesson-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lesson-muted);
}

.lesson-card__facts dd {
  margin-top: 4px;
  color: var(--lesson-ink);
}

.lesson-page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 24px;
  align-items: start;
}

.lesson-page-grid--solo {
  grid-template-columns: 1fr;
}

.lesson-identity-card {
  gap: 18px;
}

.lesson-identity-card img {
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.lesson-aside {
  display: grid;
  gap: 16px;
}

.lesson-aside--sticky {
  position: sticky;
  top: 18px;
}

.lesson-article {
  display: grid;
  gap: 18px;
  max-width: 760px;
  padding: clamp(26px, 4vw, 46px);
  border-radius: 8px;
  border: 1px solid var(--lesson-line);
  background: var(--lesson-surface-strong);
  box-shadow: var(--lesson-shadow);
}

.lesson-article h2 {
  margin-top: 12px;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.06;
}

.lesson-article h3 {
  font-size: 24px;
}

.lesson-article ul,
.passage-list {
  display: grid;
  gap: 10px;
  padding-left: 20px;
  margin: 0;
}

.lesson-article a {
  border-bottom: 1px solid currentColor;
}

.passage-list {
  padding-left: 18px;
}

.passage-list li {
  display: grid;
  gap: 4px;
  margin-bottom: 10px;
}

.passage-list span {
  font-weight: 700;
  color: var(--lesson-ink);
}

.passage-list small {
  color: var(--lesson-muted);
  line-height: 1.45;
}

.lesson-footer {
  margin-top: 70px;
  padding-top: 24px;
  border-top: 1px solid var(--lesson-line);
  flex-wrap: wrap;
}

.lesson-footer p {
  margin: 0;
  font-family: var(--lesson-serif);
  font-size: 24px;
}

/* Collapsed single-card aside — rows separated by a quiet divider */
.lesson-aside__row {
  display: grid;
  gap: 10px;
}

.lesson-aside__row + .lesson-aside__divider {
  margin: 18px 0;
  border: 0;
  border-top: 1px solid rgba(216, 169, 72, 0.35);
}

.lesson-aside__row .lesson-kicker {
  margin-bottom: 2px;
}

.lesson-aside__row .passage-list {
  padding-left: 18px;
}

/* Related lessons — whole-card link with inline cue, no boxed READ NEXT */
a.related-card {
  display: grid;
  gap: 10px;
  padding: 22px;
  color: inherit;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

a.related-card:hover,
a.related-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(216, 169, 72, 0.55);
  box-shadow: 0 16px 34px rgba(62, 31, 20, 0.08);
}

.related-card__cue {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  font-family: var(--lesson-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lesson-brown-800, #552816);
}

.related-card__cue::after {
  content: "";
}

/* Bare track heading — no eyebrow, hairline divider above */
.lesson-track__heading--bare {
  gap: 0;
  padding-top: 6px;
  border-top: 1px solid rgba(216, 169, 72, 0.35);
}

.lesson-track__heading--bare h2 {
  margin: 0;
  padding-top: 10px;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.1;
}

/* A Chosen Portion take — style the lesson-article block (remove duplicate kicker rendering issues) */
.lesson-article .ch-ask-link {
  margin-top: 8px;
}

/* Footer directory — dense but quiet SEO/AEO browse surface */
.footer-directory {
  margin-top: 56px;
  padding: 44px 0 28px;
  border-top: 1px solid var(--lesson-line);
}

.footer-directory__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px;
}

.footer-directory__column h3 {
  margin: 0 0 16px;
  font-family: var(--lesson-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lesson-muted);
}

.footer-directory__list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-directory__list--split {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 20px;
}

.footer-directory__list a {
  display: block;
  padding: 5px 0;
  color: var(--lesson-muted);
  font-family: var(--lesson-ui);
  font-size: 13px;
  line-height: 1.35;
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-directory__list a:hover,
.footer-directory__list a:focus-visible {
  color: var(--lesson-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 860px) {
  .footer-directory__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 480px) {
  .footer-directory__list--split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 880px) {
  .lesson-page {
    width: min(100% - 28px, 720px);
    padding-top: 22px;
  }

  .lesson-nav,
  .lesson-footer {
    align-items: flex-start;
  }

  .lesson-nav {
    flex-direction: column;
  }

  .lesson-hero,
  .lesson-page-grid,
  .lesson-grid,
  .lesson-list-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .lesson-aside--sticky {
    position: static;
  }

  .lesson-hero h1,
  .article-hero h1 {
    font-size: clamp(40px, 12vw, 62px);
  }
}

@media (max-width: 520px) {
  .lesson-nav__links {
    width: 100%;
  }

  .lesson-nav__links a:not(.lesson-pill) {
    min-height: 32px;
  }

  .lesson-pill,
  .lesson-card a,
  .lesson-list-card a,
  .related-card a {
    width: 100%;
  }
}