/* WIND PEDAGOGY — AQuest spatial drama + Impeccable restraint */
:root {
  --lacquer: oklch(9% 0.012 95);
  --lacquer-deep: oklch(5% 0.008 95);
  --lacquer-raised: oklch(13% 0.012 95);
  --champagne: oklch(93% 0.012 95);
  --text-warm: oklch(86% 0.012 95);
  --text-muted: oklch(68% 0.015 95);
  --text-faint: oklch(52% 0.012 95);
  --gold: oklch(84% 0.14 85);
  --gold-soft: oklch(84% 0.1 85 / 0.18);
  --patina: oklch(72% 0.08 188);
  --vermilion: oklch(62% 0.14 40);
  --paper: oklch(97% 0.012 95);
  --paper-raised: oklch(99% 0.008 95);
  --ink: oklch(18% 0.02 95);
  --ink-muted: oklch(42% 0.015 95);
  --line-dark: oklch(93% 0.01 95 / 0.12);
  --line-light: oklch(18% 0.02 95 / 0.12);
  --font-display: "Alumni Sans", "Noto Sans Thai", "Avenir Next", system-ui, sans-serif;
  --font-body: "Noto Sans Thai", "Avenir Next", "Thonburi", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Roboto Mono", Menlo, Consolas, monospace;
  --max: 1240px;
  --gutter: clamp(20px, 5vw, 80px);
}

* { box-sizing: border-box; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--lacquer);
  color: var(--champagne);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
img { max-width: 100%; display: block; }

/* ——— Shell ——— */
.site-shell { min-height: 100vh; background: var(--lacquer); }

/* ——— Cursor glow (does not capture clicks) ——— */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  pointer-events: none;
  border-radius: 50%;
  transform: translate3d(-100px, -100px, 0);
  will-change: transform;
  mix-blend-mode: screen;
}
.cursor-dot {
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  background: var(--gold);
  box-shadow: 0 0 18px oklch(84% 0.14 85 / 0.7);
}
.cursor-ring {
  width: 42px;
  height: 42px;
  margin: -21px 0 0 -21px;
  border: 1px solid oklch(84% 0.14 85 / 0.55);
  transition: width 0.2s ease, height 0.2s ease, margin 0.2s ease, border-color 0.2s ease;
}
html.cursor-hovering .cursor-ring {
  border-color: oklch(84% 0.14 85 / 0.95);
  background: oklch(84% 0.14 85 / 0.08);
}
html.has-cursor-glow,
html.has-cursor-glow * {
  cursor: none !important;
}
@media (pointer: coarse), (prefers-reduced-motion: reduce) {
  .cursor-dot,
  .cursor-ring { display: none; }
  html.has-cursor-glow,
  html.has-cursor-glow * { cursor: auto !important; }
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px var(--gutter);
  border-bottom: 1px solid transparent;
  background: oklch(9% 0.012 95 / 0.55);
  backdrop-filter: blur(10px);
  transition: background 0.25s ease, border-color 0.25s ease, padding 0.25s ease, box-shadow 0.25s ease;
}
.topbar-scrolled {
  padding-top: 12px;
  padding-bottom: 12px;
  border-bottom-color: var(--line-dark);
  background: oklch(7% 0.01 95 / 0.92);
  box-shadow: 0 12px 40px oklch(0% 0 0 / 0.28);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  z-index: 2;
  transition: color 0.2s ease, transform 0.2s ease;
}
.brand:hover { color: var(--gold); transform: translateY(-1px); }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  color: var(--gold);
  font-size: 10px;
  letter-spacing: 0.04em;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.brand:hover .brand-mark {
  background: var(--gold);
  color: var(--lacquer-deep);
  box-shadow: 0 0 24px oklch(84% 0.14 85 / 0.35);
}
.topbar-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.nav-link {
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}
.nav-link:hover { color: var(--gold); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  color: var(--gold);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.nav-link-cta::after { display: none; }
.nav-link-cta:hover {
  background: var(--gold);
  color: var(--lacquer-deep);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px oklch(84% 0.14 85 / 0.25);
}
.nav-term { color: var(--text-faint); }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  gap: 6px;
  flex-direction: column;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  z-index: 2;
}
.nav-toggle span:not(.visually-hidden) {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--champagne);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle.is-open span:nth-child(2) { transform: translateY(3.75px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-3.75px) rotate(-45deg); }

.topbar a:focus-visible,
.button:focus-visible,
.filter-pill:focus-visible,
.work-row:focus-visible,
.module-card:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ——— Hero (AQuest full-bleed) ——— */
.hero {
  position: relative;
  min-height: min(92vh, 900px);
  padding: clamp(48px, 10vh, 120px) var(--gutter) 48px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-dark);
}
.hero-cooling {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}
.hero-grid,
.hero-footer-meta {
  position: relative;
  z-index: 1;
}
.hero-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: end;
}
.hero-copy { position: relative; z-index: 1; }
.eyebrow {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.hero h1 {
  margin: 0;
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9vw, 6.5rem);
  font-weight: 300;
  line-height: 0.96;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: normal;
  color: var(--gold);
  font-weight: 100;
}
.hero-lede {
  max-width: 38ch;
  margin: 28px 0 0;
  color: var(--text-muted);
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}
.button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--lacquer-deep);
  font-weight: 600;
}
.button-ghost {
  color: var(--text-warm);
}
.button-ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.hero-aside {
  position: relative;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 18px;
  padding: 12px 0;
}
.hero-chip {
  position: relative; /* stacked in flex — never overlaps */
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--line-dark);
  background: oklch(13% 0.012 95 / 0.72);
  backdrop-filter: blur(10px);
}
.hero-chip-main {
  width: min(300px, 92%);
  z-index: 2;
  order: 2;
}
.hero-chip-main strong {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.3;
}
.hero-chip-main span:last-child {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.5;
}
/* “15 weeks” sits above the course-thread card, offset right — out of the way */
.hero-chip-date {
  order: 1;
  width: min(168px, 70%);
  margin-right: 0;
  align-self: flex-end;
  z-index: 2;
  background: oklch(84% 0.14 85 / 0.16);
  color: var(--champagne);
  border: 1px solid oklch(84% 0.14 85 / 0.28);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transform: none;
  box-shadow: 0 6px 20px oklch(0% 0 0 / 0.12);
}
.hero-chip-date .chip-label {
  color: oklch(93% 0.012 95 / 0.7);
  opacity: 1;
}
.hero-chip-date strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--champagne);
  text-shadow: 0 1px 10px oklch(0% 0 0 / 0.45);
}
.chip-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.75;
}
.hero-footer-meta {
  max-width: var(--max);
  margin: 56px auto 0;
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero-footer-meta .line {
  flex: 1;
  height: 1px;
  background: var(--line-dark);
}

/* ——— Sections ——— */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(72px, 12vw, 140px) var(--gutter);
}
.section-kicker {
  margin: 0 0 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--vermilion);
}
.section-heading {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(24px, 5vw, 72px);
  align-items: end;
  margin-bottom: clamp(40px, 6vw, 72px);
}
.section-heading h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.015em;
}
.section-heading h2 span {
  color: var(--text-muted);
}
.section-heading p {
  margin: 0;
  max-width: 42ch;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Principles as numbered rules (not cards) */
.principle-list {
  border-top: 1px solid var(--line-dark);
}
.principle-list > div {
  display: grid;
  grid-template-columns: 64px 1fr 1.2fr;
  gap: 20px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-dark);
}
.principle-list .num {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--gold);
  font-weight: 300;
}
.principle-list strong {
  font-size: 1.05rem;
  font-weight: 600;
}
.principle-list small {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* Modules / “services” */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-dark);
}
.module-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 36px 28px 40px;
  border: 0;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  min-height: 280px;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}
.module-card:last-child { border-right: 0; }
.module-card:hover {
  background: var(--lacquer-raised);
  transform: translateY(-3px);
  box-shadow: inset 0 0 0 1px oklch(84% 0.14 85 / 0.2);
}
.module-card:hover .discover { color: var(--champagne); }
.module-card .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.module-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  font-weight: 300;
  line-height: 1.15;
}
.module-card p {
  margin: 0;
  flex: 1;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}
.discover {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}
.discover span { margin-left: 8px; }

/* Works list — AQuest selected works */
.works-tools {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: 8px;
}
.filter-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-pill {
  padding: 9px 14px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 12px;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.filter-pill.is-active {
  background: var(--champagne);
  border-color: var(--champagne);
  color: var(--lacquer);
}
.filter-pill:hover:not(.is-active) {
  border-color: var(--gold);
  color: var(--gold);
}
.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(280px, 100%);
  padding: 8px 0;
  border-bottom: 1px solid var(--line-dark);
  color: var(--text-faint);
}
.search-box input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--champagne);
  font-size: 13px;
}
.search-box input::placeholder { color: var(--text-faint); }

.work-list { margin: 0; padding: 0; list-style: none; }
button.work-row,
button.module-card {
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
}
.work-row {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
  padding: 32px 12px;
  margin: 0 -12px;
  border: 0;
  border-bottom: 1px solid var(--line-dark);
  border-radius: 8px;
  color: inherit;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
  z-index: 1;
  cursor: pointer;
}
.work-row:hover,
.work-row:focus-visible {
  background: oklch(84% 0.14 85 / 0.06);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px oklch(0% 0 0 / 0.22);
}
.work-row:hover .discover,
.work-row:focus-visible .discover {
  color: var(--champagne);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.work-row:hover .work-index {
  transform: translateX(2px);
  text-shadow: 0 0 24px oklch(84% 0.14 85 / 0.45);
}
.work-row .discover {
  pointer-events: none; /* whole row is the hit target */
}
.work-index {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 100;
  color: var(--gold);
  line-height: 1;
  letter-spacing: -0.02em;
  transition: transform 0.2s ease, text-shadow 0.2s ease;
}
.work-body { min-width: 0; }
.work-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.work-meta .tag { color: var(--patina); }
.work-body h3 {
  margin: 0;
  max-width: 48ch;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.work-body > p {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}
.work-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
  text-align: right;
  min-width: 140px;
}
.work-date {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}
.work-side .discover {
  white-space: nowrap;
}
.work-side .discover:hover { text-decoration: underline; text-underline-offset: 4px; }
.empty-state {
  padding: 48px 0;
  color: var(--text-muted);
}

/* CTA band */
.cta-band {
  padding: clamp(80px, 12vw, 140px) var(--gutter);
  border-top: 1px solid var(--line-dark);
  background: var(--lacquer-deep);
}
.cta-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 40px;
}
.cta-band h2 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  font-weight: 200;
  line-height: 1.02;
}
.cta-band h2 em {
  font-style: normal;
  color: var(--gold);
}
.cta-right {
  text-align: right;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}
.cta-right a {
  display: inline-block;
  margin-top: 20px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ——— Lesson page (reading mode) ——— */
.lesson-page { min-height: 100vh; background: var(--paper); color: var(--ink); }
.lesson-header {
  padding: 0 0 64px;
  background: var(--lacquer);
  color: var(--champagne);
  border-bottom: 1px solid var(--line-dark);
}
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 18px var(--gutter);
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.lesson-nav a { color: var(--gold); }
.lesson-heading {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px var(--gutter) 0;
}
.lesson-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}
.lesson-tag {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--patina);
}
.lesson-heading h1 {
  max-width: 22ch;
  margin: 18px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.lesson-heading > p {
  max-width: 62ch;
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}
.lesson-meta-grid {
  max-width: 1080px;
  margin: 40px auto 0;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--gold);
  color: var(--lacquer-deep);
}
.lesson-meta-grid > div {
  min-height: 100px;
  padding: 22px 18px;
  border-right: 1px solid oklch(18% 0.02 95 / 0.15);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lesson-meta-grid > div:last-child { border-right: 0; }
.lesson-meta-grid span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  font-weight: 600;
  text-transform: uppercase;
}
.lesson-meta-grid strong {
  font-size: 14px;
  line-height: 1.45;
  font-weight: 600;
}

.lesson-content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px var(--gutter) 96px;
}
.lesson-markdown-intro {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-light);
  margin-bottom: 32px;
}
.lesson-section-label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vermilion);
}
.lesson-markdown-intro p {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.7;
}
.lesson-markdown {
  background: var(--paper-raised);
  border: 1px solid var(--line-light);
  padding: clamp(24px, 4vw, 48px);
  color: var(--ink);
  line-height: 1.85;
  overflow-x: auto;
}
.lesson-markdown h2 {
  margin: 2.2em 0 0.7em;
  padding-top: 0.4em;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.lesson-markdown h2:first-child { margin-top: 0; }
.lesson-markdown h3 {
  margin: 1.8em 0 0.55em;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
}
.lesson-markdown h4, .lesson-markdown h5, .lesson-markdown h6 {
  margin: 1.4em 0 0.45em;
  font-size: 1rem;
  color: var(--ink);
}
.lesson-markdown p { margin: 0 0 1.15em; max-width: 72ch; }
.lesson-markdown ul, .lesson-markdown ol { margin: 0 0 1.25em; padding-left: 1.35em; }
.lesson-markdown li { margin: 0.35em 0; }
.lesson-markdown a {
  color: var(--vermilion);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.lesson-markdown strong { color: var(--ink); font-weight: 600; }
.lesson-markdown code {
  padding: 0.12em 0.4em;
  background: oklch(18% 0.02 95 / 0.06);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}
.lesson-markdown hr {
  margin: 2.4em 0;
  border: 0;
  border-top: 1px solid var(--line-light);
}
.lesson-markdown blockquote {
  margin: 1.4em 0;
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 3px solid var(--gold);
  color: var(--ink-muted);
}
.lesson-table-wrap { overflow-x: auto; margin: 1.4em 0 1.6em; }
.lesson-markdown table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.55;
}
.lesson-markdown th, .lesson-markdown td {
  padding: 12px 14px;
  border: 1px solid var(--line-light);
  text-align: left;
  vertical-align: top;
}
.lesson-markdown th {
  background: oklch(18% 0.02 95 / 0.05);
  font-weight: 700;
}
.lesson-figure { margin: 1.6em 0 1.8em; }
.lesson-figure img {
  max-width: 100%;
  max-height: 520px;
  margin: 0 auto;
  border: 1px solid var(--line-light);
  object-fit: contain;
}
.lesson-figure figcaption {
  margin-top: 10px;
  color: var(--ink-muted);
  font-size: 12px;
  text-align: center;
}
.lesson-inline-image { max-width: 100%; vertical-align: middle; }

.lesson-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px var(--gutter) 48px;
  border-top: 1px solid var(--line-light);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--ink-muted);
  font-size: 12px;
}
.lesson-footer a {
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ——— Responsive ——— */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .topbar-links {
    position: fixed;
    inset: 0 0 auto 0;
    top: 64px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px var(--gutter) 20px;
    background: oklch(7% 0.01 95 / 0.96);
    border-bottom: 1px solid var(--line-dark);
    backdrop-filter: blur(14px);
  }
  .topbar-links.is-open { display: flex; }
  .topbar-links .nav-link,
  .topbar-links .nav-link-cta,
  .topbar-links .nav-term {
    padding: 14px 0;
    border-bottom: 1px solid var(--line-dark);
  }
  .topbar-links .nav-link-cta {
    margin-top: 10px;
    justify-content: center;
    border-bottom: 0;
  }
  .hero-grid { grid-template-columns: 1fr; min-height: 0; }
  .hero-aside { min-height: 240px; margin-top: 12px; }
  .section-heading { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: 1fr; }
  .module-card { border-right: 0; min-height: 0; }
  .work-row { grid-template-columns: 52px 1fr; }
  .work-side {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    min-width: 0;
    width: 100%;
  }
  .principle-list > div { grid-template-columns: 48px 1fr; }
  .principle-list small { grid-column: 2; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-right { text-align: left; display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
  .lesson-meta-grid { grid-template-columns: 1fr; }
  .lesson-meta-grid > div {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid oklch(18% 0.02 95 / 0.15);
  }
  .lesson-meta-grid > div:last-child { border-bottom: 0; }
  .lesson-footer { flex-direction: column; }
  .topbar-links span.hide-sm { display: none; }
}

/* ——— In-page lesson viewer (no router required) ——— */
.lesson-viewer {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: stretch;
}
.lesson-viewer-backdrop {
  position: absolute;
  inset: 0;
  background: oklch(4% 0.008 95 / 0.72);
  backdrop-filter: blur(6px);
}
.lesson-viewer-panel {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: 100%;
  margin: 0;
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  box-shadow: none;
  overflow: hidden;
}
.lesson-viewer-bar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px clamp(16px, 3vw, 28px);
  background: var(--lacquer);
  color: var(--champagne);
  border-bottom: 1px solid var(--line-dark);
}
.lesson-viewer-close {
  border: 0;
  background: transparent;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 8px 0;
}
.lesson-viewer-close:hover { text-decoration: underline; text-underline-offset: 3px; }
.lesson-viewer-bar-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.lesson-viewer-permalink {
  color: var(--gold);
}
.lesson-viewer-hero {
  padding: 28px clamp(16px, 3vw, 36px) 18px;
  background: var(--lacquer);
  color: var(--champagne);
}
.lesson-viewer-hero h1 {
  margin: 10px 0 12px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 300;
  line-height: 1.08;
}
.lesson-viewer-hero > p {
  margin: 0;
  max-width: 62ch;
  color: var(--text-muted);
  line-height: 1.65;
}
.lesson-viewer-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.lesson-viewer-chips span {
  padding: 6px 10px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  font-size: 11px;
  color: var(--text-muted);
}

.lesson-resource-links {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
}
.lesson-resource-label {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.lesson-resource-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.lesson-resource-link {
  color: var(--champagne);
  border-color: var(--line-dark);
  text-decoration: none;
}
.lesson-resource-link:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.lesson-viewer-body {
  flex: 1;
  overflow: auto;
  padding: 0;
  background: var(--paper);
}
.lesson-viewer-body .lesson-markdown {
  border: 0;
  background: var(--paper-raised);
  padding: clamp(24px, 4vw, 48px);
}
.lesson-viewer-status {
  margin: 24px 0;
  color: var(--ink-muted);
  line-height: 1.6;
}
.lesson-viewer-error {
  padding: 18px;
  border: 1px solid oklch(62% 0.14 40 / 0.35);
  background: oklch(62% 0.14 40 / 0.08);
  color: var(--ink);
}
.lesson-viewer-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px clamp(16px, 3vw, 28px);
  border-top: 1px solid var(--line-light);
  background: var(--paper-raised);
  color: var(--ink-muted);
  font-size: 13px;
}
.lesson-viewer-footer .button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}
.lesson-viewer-footer .button-ghost {
  color: var(--ink);
  border-color: var(--line-light);
}
.lesson-viewer-footer .button-primary {
  color: var(--lacquer-deep);
}

@media (max-width: 720px) {
  .lesson-viewer-panel {
    width: 100%;
    height: 100%;
    max-height: none;
  }
  .lesson-viewer-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 14px 18px;
  }
  .lesson-viewer-close {
    font-size: 13px;
    letter-spacing: 0.06em;
  }
  .lesson-viewer-bar-meta {
    font-size: 12px;
    line-height: 1.45;
  }
  .lesson-viewer-hero {
    padding: 24px 20px 20px;
  }
  .lesson-viewer-hero h1 {
    font-size: clamp(2rem, 8vw, 2.6rem);
    line-height: 1.15;
  }
  .lesson-viewer-hero > p {
    font-size: 1.08rem;
    line-height: 1.8;
  }
  .lesson-viewer-chips span {
    padding: 8px 11px;
    font-size: 12px;
  }
  .lesson-viewer-body .lesson-markdown {
    padding: 26px 20px 44px;
    font-size: 18px;
    line-height: 2;
  }
  .lesson-viewer-body .lesson-markdown h2 {
    font-size: 1.65rem;
    line-height: 1.3;
  }
  .lesson-viewer-body .lesson-markdown h3 {
    font-size: 1.25rem;
    line-height: 1.4;
  }
  .lesson-viewer-body .lesson-markdown p {
    max-width: none;
  }
  .lesson-viewer-footer {
    flex-wrap: wrap;
    justify-content: center;
    padding: 12px 16px;
    font-size: 14px;
  }
  .lesson-viewer-footer .button {
    min-height: 44px;
    padding: 10px 14px;
    font-size: 14px;
  }
}

@media (max-width: 420px) {
  .lesson-viewer-hero h1 { font-size: 1.9rem; }
  .lesson-viewer-hero > p { font-size: 1rem; }
  .lesson-viewer-body .lesson-markdown {
    padding-inline: 18px;
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .module-card, .filter-pill, .work-row { transition: none; }
  .button:hover { transform: none; }
}