/* ============================================================
   AI Architect Academy — design system
   Palette: Ink & Ember
   Type: Inter + JetBrains Mono
   Vibe: Stripe-technical top half, Veritas-trust bottom half
   ============================================================ */

/* ---- Design tokens ---------------------------------------- */

:root {
  /* Palette — Ink & Ember */
  --color-paper:       #FAFAF7;   /* top-half background */
  --color-paper-warm:  #F3EEE4;   /* bottom-half background */
  --color-paper-deep:  #EBE4D6;   /* footer + dense-trust card */
  --color-ink:         #111418;
  --color-ink-80:      #2B2E33;
  --color-ink-60:      #5A5F66;   /* muted */
  --color-ink-30:      rgba(17, 20, 24, 0.30);
  --color-ink-10:      rgba(17, 20, 24, 0.10);   /* rules */
  --color-ink-05:      rgba(17, 20, 24, 0.05);   /* code tint */
  --color-ember:       #B9441C;
  --color-ember-dark:  #8E3615;
  --color-ember-10:    rgba(185, 68, 28, 0.10);

  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Type ramp (fluid) */
  --fs-display-xl:  clamp(40px, 5.5vw, 64px);
  --fs-display-l:   clamp(28px, 3.6vw, 40px);
  --fs-display-m:   clamp(22px, 2.6vw, 28px);
  --fs-body-l:      clamp(18px, 1.5vw, 20px);
  --fs-body-m:      17px;
  --fs-body-s:      14px;
  --fs-small-caps:  12px;

  /* Line heights */
  --lh-tight: 1.08;
  --lh-head:  1.18;
  --lh-body:  1.6;

  /* Spacing scale (8-based) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Layout */
  --container:     1200px;
  --container-mid: 960px;
  --container-text: 720px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0, 0, 1);
}

/* ---- Reset-ish --------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body-m);
  line-height: var(--lh-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-text-size-adjust: 100%;
}

img, svg { display: block; max-width: 100%; height: auto; }

a { color: var(--color-ink); text-decoration-color: var(--color-ink-30); text-underline-offset: 2px; }
a:hover { color: var(--color-ember); text-decoration-color: var(--color-ember); }

button { font: inherit; cursor: pointer; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--s-4);
  color: var(--color-ink);
  line-height: var(--lh-head);
}

h1 { font-size: var(--fs-display-xl); letter-spacing: -0.025em; line-height: var(--lh-tight); }
h2 { font-size: var(--fs-display-l); letter-spacing: -0.02em; }
h3 { font-size: var(--fs-display-m); letter-spacing: -0.015em; }

p { margin: 0 0 var(--s-4); max-width: 68ch; }

ul, ol { margin: 0 0 var(--s-4); padding-left: 1.2em; }
li + li { margin-top: var(--s-2); }

strong { font-weight: 600; }
em { font-style: italic; color: var(--color-ink); }

hr {
  border: 0;
  border-top: 1px solid var(--color-ink-10);
  margin: var(--s-8) 0;
}

/* ---- Skip link --------------------------------------------- */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--s-3) var(--s-4);
  z-index: 1000;
  text-decoration: none;
}
.skip-link:focus { top: 0; color: var(--color-paper); }

/* ---- Focus states ----------------------------------------- */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
details > summary:focus-visible {
  outline: 2px solid var(--color-ember);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---- Utilities --------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--s-5);
}
@media (min-width: 720px) { .container { padding: 0 var(--s-6); } }

.container--mid { max-width: var(--container-mid); }
.container--text { max-width: var(--container-text); }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.text-muted { color: var(--color-ink-60); }
.text-small { font-size: var(--fs-body-s); }
.text-fine  { font-size: var(--fs-body-s); color: var(--color-ink-60); }
.mono       { font-family: var(--font-mono); }
.small-caps {
  font-family: var(--font-mono);
  font-size: var(--fs-small-caps);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ---- Wordmark ---------------------------------------------- */

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  white-space: nowrap;
}
.wordmark:hover { color: var(--color-ink); text-decoration: none; }
.wordmark__prefix,
.wordmark__suffix { color: var(--color-ink); }
.wordmark__mono {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.94em; /* compensate for mono's larger x-height feel */
}

/* Footer wordmark — small caps */
.wordmark--small { font-size: 16px; }

/* ---- Buttons ----------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 12px 20px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.005em;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 120ms var(--ease), border-color 120ms var(--ease), color 120ms var(--ease), transform 80ms var(--ease);
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--color-ember);
  color: var(--color-paper);
  border-color: var(--color-ember);
}
.btn--primary:hover { background: var(--color-ember-dark); border-color: var(--color-ember-dark); color: var(--color-paper); }

.btn--secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn--secondary:hover { background: var(--color-ink); color: var(--color-paper); }

.btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink-10);
}
.btn--ghost:hover { border-color: var(--color-ink); }

.btn--large { padding: 16px 28px; font-size: 16px; }
.btn--small { padding: 8px 14px;  font-size: 14px; }
.btn--block { width: 100%; }

/* Text link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-ember);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.link-arrow:hover {
  color: var(--color-ember-dark);
  border-bottom-color: var(--color-ember-dark);
}
.link-arrow::after { content: "→"; transition: transform 140ms var(--ease); }
.link-arrow:hover::after { transform: translateX(3px); }

/* ---- Pills / tags ------------------------------------------ */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-80);
  background: var(--color-ink-05);
  border: 1px solid var(--color-ink-10);
  border-radius: 999px;
}
.pill--ember {
  color: var(--color-ember-dark);
  background: var(--color-ember-10);
  border-color: rgba(185, 68, 28, 0.25);
}

/* Trust row: 4 pills side by side in the hero */
.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-top: var(--s-6);
}
.trust-row .pill { font-size: 12px; padding: 6px 12px; }

/* ---- Header / nav ------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 247, 0.88);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-ink-10);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-4) 0;
  gap: var(--s-5);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav__links > li {
  display: inline-flex;
  align-items: center;
  margin-top: 0; /* override the global `li + li { margin-top: var(--s-2) }` rule, which is meant for vertical body-content lists and otherwise pushes every nav item except the first down by 8px under flex + align-items: center */
}
.nav__links a {
  color: var(--color-ink-80);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  display: inline-flex;
  align-items: center;
}
.nav__links a:hover { color: var(--color-ember); }

.nav__cta { display: none; }
@media (min-width: 900px) { .nav__cta { display: inline-flex; } }

.nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
}
.nav__toggle svg { width: 20px; height: 20px; }

/* Mobile menu: hide desktop links on small screens */
@media (max-width: 899px) {
  .nav__links { display: none; }
  .nav__links.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: var(--s-5);
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-ink-10);
    gap: var(--s-4);
  }
  .nav__links.is-open .nav__cta { display: inline-flex; }
}
@media (min-width: 900px) {
  .nav__toggle { display: none; }
}

/* Minimal-nav variant used on /free-preview */
.nav--minimal .nav__links,
.nav--minimal .nav__toggle { display: none; }

/* ---- Hero -------------------------------------------------- */

.hero {
  padding: clamp(var(--s-8), 10vw, var(--s-10)) 0 var(--s-9);
  position: relative;
}

.hero__eyebrow {
  display: inline-block;
  margin-bottom: var(--s-5);
}

.hero__headline {
  max-width: 18ch;
  margin-bottom: var(--s-5);
}
.hero__headline--narrow { max-width: 22ch; }

.hero__sub {
  font-size: var(--fs-body-l);
  color: var(--color-ink-80);
  max-width: 56ch;
  line-height: 1.5;
  margin-bottom: var(--s-6);
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-bottom: var(--s-5);
}

.hero__support {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  margin-top: var(--s-5);
}

/* ---- Section ----------------------------------------------- */

.section {
  padding: var(--s-9) 0;
  border-top: 1px solid var(--color-ink-10);
}
.section--tight { padding: var(--s-7) 0; }
.section--warm  { background: var(--color-paper-warm); }
.section--deep  { background: var(--color-paper-deep); }

.section__eyebrow {
  margin-bottom: var(--s-4);
  display: inline-block;
}
.section__head {
  max-width: 28ch;
  margin-bottom: var(--s-6);
}
.section__intro {
  max-width: 62ch;
  font-size: var(--fs-body-l);
  color: var(--color-ink-80);
  margin-bottom: var(--s-7);
  line-height: 1.5;
}

/* The hard Stripe-top / Veritas-bottom handoff */
.section-divider {
  height: 1px;
  background: var(--color-ink-10);
  margin: 0;
  border: 0;
}

/* ---- Contrast panel (three-column table) ------------------ */

.contrast-panel {
  margin-top: var(--s-6);
  border-top: 1px solid var(--color-ink-10);
}
.contrast-panel__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
  padding: var(--s-5) 0;
  border-bottom: 1px solid var(--color-ink-10);
}
@media (min-width: 720px) {
  .contrast-panel__row { grid-template-columns: 1fr 1fr; gap: var(--s-7); }
}
.contrast-panel__label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-60);
  margin-bottom: var(--s-2);
}
.contrast-panel__old  { color: var(--color-ink-60); }
.contrast-panel__new  { color: var(--color-ink); font-weight: 500; }

/* ---- Outcome grid (6 tiles) -------------------------------- */

.outcome-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  align-items: stretch; /* explicit; default but make sure cards in the same row match heights */
}
@media (min-width: 720px) { .outcome-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .outcome-grid { grid-template-columns: repeat(3, 1fr); } }

.outcome {
  padding: var(--s-5);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  margin: 0; /* full reset — neutralizes the global `li + li { margin-top: var(--s-2) }` rule and any other list-related margin that would push cards 2/3 down by 8px in the horizontal grid */
  align-self: stretch; /* explicit; ensures every card fills the grid row regardless of natural content height */
}
.outcome__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  letter-spacing: 0.08em;
}
.outcome__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0;
}
.outcome__body {
  font-size: 15px;
  color: var(--color-ink-80);
  line-height: 1.55;
  margin: 0;
}

/* ---- Module list ------------------------------------------- */

.module-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--color-ink-10);
}
.module {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: var(--s-4);
  padding: var(--s-5) 0;
  border-bottom: 1px solid var(--color-ink-10);
  align-items: start;
}
@media (min-width: 720px) {
  .module { grid-template-columns: 60px 1fr 120px; gap: var(--s-6); }
}
.module__num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-ink-60);
  padding-top: 3px;
}
.module__body { }
.module__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--s-2);
}
.module__desc {
  font-size: 15px;
  color: var(--color-ink-80);
  line-height: 1.55;
  margin: 0;
}
.module__hours {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  letter-spacing: 0.04em;
  padding-top: 4px;
  white-space: nowrap;
}

/* ---- Two-column blocks ------------------------------------- */

.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-7);
}
@media (min-width: 860px) {
  .two-col { grid-template-columns: 1fr 1fr; gap: var(--s-8); }
}
.two-col__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: var(--s-3);
}

/* Pullquote */
.pullquote {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  border-left: 3px solid var(--color-ember);
  padding-left: var(--s-5);
  margin: var(--s-7) 0;
}

/* ---- Two-layer card (Core Book / Recipe Book) -------------- */

.two-layer {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-top: var(--s-6);
}
@media (min-width: 720px) { .two-layer { grid-template-columns: 1fr 1fr; } }

.layer-card {
  padding: var(--s-6);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  background: var(--color-paper);
}
.layer-card__tag { margin-bottom: var(--s-4); }
.layer-card h3 { margin-bottom: var(--s-3); }

.callout {
  margin-top: var(--s-5);
  padding: var(--s-5);
  background: var(--color-ink-05);
  border-left: 3px solid var(--color-ember);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 15px;
  line-height: 1.55;
}
.callout p:last-child { margin-bottom: 0; }
.callout .mono { background: var(--color-ember-10); color: var(--color-ember-dark); padding: 1px 6px; border-radius: 3px; font-size: 0.9em; }

/* ---- Pricing table ----------------------------------------- */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  margin-top: var(--s-6);
}
@media (min-width: 900px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 0; align-items: stretch; }
}

.price-card {
  padding: var(--s-6);
  border: 1px solid var(--color-ink-10);
  background: var(--color-paper);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
@media (min-width: 900px) {
  .price-card { border-radius: 0; border-right-width: 0; }
  .price-card:first-child { border-radius: var(--radius-md) 0 0 var(--radius-md); }
  .price-card:last-child  { border-radius: 0 var(--radius-md) var(--radius-md) 0; border-right-width: 1px; }
}
.price-card--featured {
  background: var(--color-paper);
  border-color: var(--color-ink);
  border-width: 2px;
  margin: -8px 0;
  padding: calc(var(--s-6) + 8px) var(--s-6);
  z-index: 2;
  position: relative;
}
@media (min-width: 900px) {
  .price-card--featured {
    border-radius: var(--radius-md);
    border-right-width: 2px;
  }
  .price-card--featured + .price-card { border-left-width: 0; }
}

.price-card__eyebrow { margin-bottom: var(--s-2); }
.price-card__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}
.price-card__for {
  font-size: 14px;
  color: var(--color-ink-60);
  margin: 0;
  min-height: 2.2em;
}
.price-card__price {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--color-ink);
}
.price-card__price .mono { font-family: var(--font-mono); font-size: 14px; font-weight: 400; color: var(--color-ink-60); letter-spacing: 0; }
.price-card__details {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--s-4);
  font-size: 15px;
  color: var(--color-ink-80);
}
.price-card__details li {
  padding: var(--s-2) 0;
  border-bottom: 1px dashed var(--color-ink-10);
}
.price-card__details li:last-child { border-bottom: 0; }

.price-card__cta { margin-top: auto; }

.pricing-fine {
  margin-top: var(--s-5);
  font-size: 13px;
  color: var(--color-ink-60);
  line-height: 1.6;
}
.pricing-fine p { margin: 0 0 var(--s-2); }
.pricing-fine p:last-child { margin: 0; }

/* ---- Credit cards (4-up) ----------------------------------- */

.credit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-top: var(--s-6);
}
@media (min-width: 720px) { .credit-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .credit-grid { grid-template-columns: repeat(4, 1fr); } }
.credit-card {
  padding: var(--s-5);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  background: var(--color-paper);
}
.credit-card__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--s-2);
}
.credit-card__body {
  font-size: 14px;
  line-height: 1.55;
  color: var(--color-ink-80);
  margin: 0;
}

/* ---- Transcript snippet card ------------------------------- */

.transcript-card {
  margin-top: var(--s-6);
  padding: var(--s-6);
  background: var(--color-paper);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-ink);
}
.transcript-card__head {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: var(--s-3);
  color: var(--color-ink);
}
.transcript-card__body p:last-child { margin-bottom: 0; }

/* ---- Who it's for (two-column panel) ----------------------- */

.audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-top: var(--s-5);
}
@media (min-width: 720px) { .audience-grid { grid-template-columns: 1fr 1fr; gap: var(--s-7); } }

.audience-card {
  padding: var(--s-5);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  background: var(--color-paper);
}
.audience-card h3 { font-size: 20px; margin-bottom: var(--s-4); }
.audience-card ul { list-style: none; padding: 0; margin: 0; }
.audience-card li {
  padding-left: 24px;
  padding-bottom: var(--s-3);
  position: relative;
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-ink-80);
}
.audience-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 12px; height: 1.5px;
  background: var(--color-ember);
}
.audience-card--not li::before { background: var(--color-ink-30); }

/* ---- Testimonial slots ------------------------------------- */

.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-top: var(--s-6);
}
@media (min-width: 900px) { .testimonial-grid { grid-template-columns: repeat(3, 1fr); } }

.testimonial {
  padding: var(--s-5);
  border: 1px dashed var(--color-ink-30);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.testimonial__quote {
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-ink-60);
  margin: 0;
  font-style: italic;
}
.testimonial__attr {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  letter-spacing: 0.04em;
}
.testimonial__placeholder-note {
  margin-top: var(--s-5);
  text-align: center;
  font-size: 13px;
  color: var(--color-ink-60);
  font-style: italic;
}

/* ---- FAQ accordion ----------------------------------------- */

.faq {
  margin-top: var(--s-6);
  border-top: 1px solid var(--color-ink-10);
}
.faq__item {
  border-bottom: 1px solid var(--color-ink-10);
}
.faq__item > summary {
  padding: var(--s-5) 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-4);
}
.faq__item > summary::-webkit-details-marker { display: none; }
.faq__item > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 300;
  color: var(--color-ink-60);
  width: 20px;
  text-align: center;
  transition: transform 160ms var(--ease);
  flex-shrink: 0;
}
.faq__item[open] > summary::after { content: "–"; color: var(--color-ember); }
.faq__item > summary:hover { color: var(--color-ember); }
.faq__answer {
  padding: 0 0 var(--s-5);
  color: var(--color-ink-80);
  font-size: 15px;
  line-height: 1.65;
  max-width: 68ch;
}
.faq__answer p:last-child { margin-bottom: 0; }

/* ---- Final CTA block --------------------------------------- */

.final-cta {
  padding: var(--s-9) 0;
  background: var(--color-ink);
  color: var(--color-paper);
  border: 0;
}
.final-cta h2 { color: var(--color-paper); max-width: 24ch; }
.final-cta p { color: rgba(250, 250, 247, 0.8); max-width: 62ch; }
.final-cta .btn--primary { background: var(--color-ember); border-color: var(--color-ember); }
.final-cta .btn--secondary { color: var(--color-paper); border-color: rgba(250, 250, 247, 0.3); }
.final-cta .btn--secondary:hover { background: var(--color-paper); color: var(--color-ink); }
.final-cta .link-arrow { color: var(--color-paper); }
.final-cta .link-arrow:hover { color: var(--color-ember); border-bottom-color: var(--color-ember); }

.final-cta__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-top: var(--s-6);
  align-items: center;
}

/* ---- Footer ------------------------------------------------ */

.site-footer {
  background: var(--color-paper-deep);
  border-top: 1px solid var(--color-ink-10);
  padding: var(--s-9) 0 var(--s-5);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-6);
  margin-bottom: var(--s-7);
}
@media (min-width: 720px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--s-7); } }

.footer__brand .wordmark { font-size: 18px; margin-bottom: var(--s-3); display: inline-flex; }
.footer__brand p { max-width: 40ch; color: var(--color-ink-60); font-size: 13px; line-height: 1.55; }

.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-60);
  margin-bottom: var(--s-3);
  font-weight: 500;
}
.footer__col ul { list-style: none; padding: 0; margin: 0; }
.footer__col li { padding: var(--s-1) 0; }
.footer__col a { color: var(--color-ink-80); text-decoration: none; }
.footer__col a:hover { color: var(--color-ember); }

.footer__bar {
  border-top: 1px solid var(--color-ink-10);
  padding-top: var(--s-5);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s-3);
  font-size: 12px;
  color: var(--color-ink-60);
}

/* ---- Free-preview specific --------------------------------- */

.preview-form {
  margin-top: var(--s-6);
  padding: var(--s-6);
  background: var(--color-paper);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  max-width: 520px;
}
.preview-form h2 { font-size: 22px; margin-bottom: var(--s-5); }
.preview-form__field { margin-bottom: var(--s-4); }
.preview-form__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  margin-bottom: var(--s-2);
}
.preview-form input[type="email"],
.preview-form select {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-ink);
  background: var(--color-paper);
  border: 1px solid var(--color-ink-30);
  border-radius: var(--radius-sm);
  transition: border-color 120ms var(--ease);
}
.preview-form input[type="email"]:focus,
.preview-form select:focus { border-color: var(--color-ember); }

.preview-form__submit { margin-top: var(--s-3); width: 100%; }

.preview-form__trust {
  margin-top: var(--s-4);
  font-size: 13px;
  color: var(--color-ink-60);
  line-height: 1.5;
}

/* ---- Sequence diagram (bundle /5) -------------------------- */

.sequence-diagram {
  margin-top: var(--s-6);
  padding: var(--s-6);
  background: var(--color-paper-warm);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-ink-80);
  overflow-x: auto;
}
.sequence-diagram__row {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: var(--s-3);
  align-items: center;
  text-align: center;
}
@media (max-width: 720px) {
  .sequence-diagram__row { grid-template-columns: 1fr; gap: var(--s-4); }
  .sequence-diagram__arrow { transform: rotate(90deg); text-align: center; }
}
.sequence-diagram__box {
  padding: var(--s-4);
  background: var(--color-paper);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-sm);
}
.sequence-diagram__box strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--color-ink);
  margin-bottom: 4px;
}
.sequence-diagram__box span { color: var(--color-ink-60); font-size: 12px; }
.sequence-diagram__arrow { color: var(--color-ink-30); font-size: 18px; }

/* ---- Stub page layout (placeholder pages) ------------------ */

.stub {
  padding: var(--s-9) 0;
  max-width: var(--container-text);
  margin: 0 auto;
}
.stub h1 { font-size: clamp(32px, 4.2vw, 48px); margin-bottom: var(--s-4); }
.stub__lede { font-size: var(--fs-body-l); color: var(--color-ink-80); margin-bottom: var(--s-6); }
.stub__note {
  padding: var(--s-5);
  background: var(--color-paper-warm);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  margin-bottom: var(--s-6);
  font-size: 15px;
  color: var(--color-ink-80);
}
.stub__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-top: var(--s-6);
}

/* ---- Bundle math table ------------------------------------- */

.bundle-math {
  margin-top: var(--s-6);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-paper);
}
.bundle-math table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
}
.bundle-math th,
.bundle-math td {
  padding: var(--s-4) var(--s-5);
  text-align: left;
  border-bottom: 1px solid var(--color-ink-10);
  font-size: 15px;
}
.bundle-math thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  font-weight: 500;
  border-bottom: 1px solid var(--color-ink);
}
.bundle-math td.num,
.bundle-math th.num { text-align: right; font-variant-numeric: tabular-nums; }
.bundle-math tr:last-child td { border-bottom: 0; }
.bundle-math tr.bundle-math__combined td {
  background: var(--color-paper-warm);
  font-weight: 600;
}
.bundle-math tr.bundle-math__combined td.num { font-size: 17px; }
.bundle-math tr.bundle-math__save td {
  background: var(--color-ink);
  color: var(--color-paper);
  font-weight: 600;
}
.bundle-math tr.bundle-math__save td.num {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--color-paper);
}
.bundle-math tr.bundle-math__save td.num .crossed {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(250, 250, 247, 0.5);
  text-decoration: line-through;
  margin-right: var(--s-3);
  font-weight: 400;
  letter-spacing: 0;
}

/* ---- Bundle course cards (equal weight, two-up) ------------ */

.bundle-courses {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-top: var(--s-6);
}
@media (min-width: 860px) { .bundle-courses { grid-template-columns: 1fr 1fr; gap: var(--s-6); } }

.course-card {
  padding: var(--s-6);
  background: var(--color-paper);
  border: 1px solid var(--color-ink-10);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.course-card__eyebrow { margin-bottom: var(--s-2); }
.course-card__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0;
}
.course-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  letter-spacing: 0.04em;
  margin-bottom: var(--s-3);
}
.course-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.course-card li {
  padding-left: 22px;
  padding-bottom: var(--s-3);
  position: relative;
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-ink-80);
}
.course-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 12px; height: 1.5px;
  background: var(--color-ember);
}

.bundle-summary {
  margin-top: var(--s-6);
  padding: var(--s-5);
  text-align: center;
  font-size: var(--fs-body-l);
  color: var(--color-ink);
  border-top: 1px solid var(--color-ink-10);
}
.bundle-summary strong { font-weight: 600; }

/* ---- Breadcrumb (bundle page) ------------------------------ */

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  padding: var(--s-4) 0;
  letter-spacing: 0.04em;
}
.breadcrumb a { color: var(--color-ink-60); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-ember); }
.breadcrumb__sep { margin: 0 var(--s-2); }
.breadcrumb__current { color: var(--color-ink); }

/* ---- Lesson layout (for /preview/lesson-1/ and future lesson pages) --- */

.lesson-hero {
  padding: var(--s-8) 0 var(--s-6);
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-paper-warm);
}
.lesson-hero__eyebrow { margin-bottom: var(--s-3); }
.lesson-hero__title {
  font-size: clamp(32px, 4.4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: var(--s-4);
  max-width: 24ch;
}
.lesson-hero__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  letter-spacing: 0.04em;
  margin-bottom: var(--s-4);
}
.lesson-hero__meta span + span::before {
  content: "·";
  margin: 0 var(--s-2);
  color: var(--color-ink-30);
}

.lesson {
  padding: var(--s-8) 0 var(--s-9);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-ink);
}
.lesson p { margin: 0 0 var(--s-4); }
.lesson em { font-style: italic; }
.lesson strong { font-weight: 600; color: var(--color-ink); }

.lesson h2 {
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: var(--s-8) 0 var(--s-4);
  color: var(--color-ink);
}
.lesson h2:first-child { margin-top: 0; }

.lesson h3 {
  font-size: 18px;
  margin: var(--s-6) 0 var(--s-3);
}

.lesson__tag {
  /* Tag badges (CORE / RECIPE) are hidden in production. The metadata still lives in
     the markdown frontmatter (`tag_mix:`, `recipes:`) and drives the quarterly Recipe
     Book refresh workflow; students don't need to see the routing labels in the UI. */
  display: none;
}

/* Hide wrapper spans whose only content is one or more lesson__tag badges.
   Without this, lesson rows that show "CORE + RECIPE" would render as a stray " + ".
   Uses :has() (Chrome 105+, Safari 15.4+, Firefox 121+, all 2023+).
   Falls back gracefully on older browsers — wrapper still renders, just empty/sparse. */
.small-caps:has(> .lesson__tag) {
  display: none;
}

.lesson__diagram {
  background: var(--color-paper-deep);
  border: 1px dashed var(--color-ink-30);
  border-radius: 6px;
  padding: var(--s-5);
  margin: var(--s-5) 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ink-60);
  line-height: 1.55;
}
.lesson__diagram strong {
  display: block;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  margin-bottom: var(--s-2);
  font-weight: 500;
}

.lesson__figure {
  background: var(--color-paper-deep);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--s-5) var(--s-5) var(--s-4);
  margin: var(--s-6) 0;
}
.lesson__figure svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto;
}
.lesson__figure figcaption {
  display: block;
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--color-rule);
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-ink-60);
  text-align: center;
}
.lesson__figure figcaption strong {
  display: block;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  margin-bottom: 4px;
  font-weight: 500;
}

.lesson__divider {
  border: 0;
  border-top: 1px solid var(--color-rule);
  margin: var(--s-7) 0;
}

/* Command-line styling for [RECIPE] blocks */
.cmd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-paper-deep);
  border: 1px solid var(--color-rule);
  border-left: 3px solid var(--color-ember);
  color: var(--color-ink);
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
}
.cmd-block {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  background: var(--color-paper-deep);
  border: 1px solid var(--color-rule);
  border-left: 3px solid var(--color-ember);
  color: var(--color-ink);
  padding: var(--s-3) var(--s-4);
  border-radius: 4px;
  margin: var(--s-3) 0;
  white-space: pre-wrap;
  overflow-x: auto;
}
.cmd-block .cmd-prompt {
  color: var(--color-ember);
  user-select: none;
  margin-right: 6px;
}
.cmd-block .cmd-comment {
  color: var(--color-ink-60);
  font-style: italic;
}

.lesson__callout {
  background: var(--color-paper-warm);
  border-left: 3px solid var(--color-ember);
  padding: var(--s-5) var(--s-6);
  margin: var(--s-6) 0;
  border-radius: 0 6px 6px 0;
}
.lesson__callout h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ember-dark);
  margin: 0 0 var(--s-3);
  font-weight: 600;
}
.lesson__callout ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.lesson__callout li {
  position: relative;
  padding-left: var(--s-5);
  margin-bottom: var(--s-3);
  font-size: 15px;
  line-height: 1.55;
}
.lesson__callout li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--color-ember);
  border-radius: 50%;
}
.lesson__callout li:last-child { margin-bottom: 0; }

.lesson__activity,
.lesson__checkpoint,
.lesson__reflection {
  background: var(--color-paper-warm);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--s-6);
  margin: var(--s-6) 0;
}
.lesson__activity h3,
.lesson__checkpoint h3,
.lesson__reflection h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-60);
  margin: 0 0 var(--s-3);
  font-weight: 600;
  font-family: var(--font-body);
}
.lesson__activity h4,
.lesson__checkpoint h4,
.lesson__reflection h4 {
  font-size: 20px;
  margin: 0 0 var(--s-4);
  line-height: 1.3;
}
.lesson__activity ol {
  padding-left: var(--s-5);
  margin: var(--s-3) 0;
}
.lesson__activity ol li {
  margin-bottom: var(--s-3);
  line-height: 1.55;
}
.lesson__activity .deliverable {
  margin-top: var(--s-4);
  padding-top: var(--s-4);
  border-top: 1px solid var(--color-rule);
  font-size: 15px;
  color: var(--color-ink-80);
}

.lesson__quiz {
  margin: var(--s-6) 0;
}
.lesson__quiz h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-60);
  margin: 0 0 var(--s-3);
  font-weight: 600;
}
.lesson__question {
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 0;
  margin: 0 0 var(--s-4);
  background: var(--color-paper);
  overflow: hidden;
}
.lesson__question > summary {
  padding: var(--s-4) var(--s-5);
  cursor: pointer;
  font-weight: 500;
  list-style: none;
  position: relative;
  padding-right: var(--s-8);
  line-height: 1.5;
  transition: color 140ms var(--ease);
}
.lesson__question > summary::-webkit-details-marker { display: none; }
.lesson__question > summary::after {
  content: "Show answer +";
  position: absolute;
  right: var(--s-5);
  top: var(--s-4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--color-ember);
}
.lesson__question[open] > summary::after {
  content: "Hide answer –";
}
.lesson__question > summary:hover { color: var(--color-ember); }
.lesson__question__options {
  list-style: none;
  padding: 0;
  margin: var(--s-3) 0 0;
}
.lesson__question__options li {
  padding: var(--s-1) 0;
  font-size: 15px;
  color: var(--color-ink-80);
}
.lesson__question__options li .mono {
  display: inline-block;
  width: 24px;
  font-weight: 500;
  color: var(--color-ink-60);
}
.lesson__answer {
  padding: var(--s-4) var(--s-5);
  border-top: 1px solid var(--color-rule);
  background: var(--color-paper-warm);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ink-80);
}
.lesson__answer strong { color: var(--color-ink); }

/* ----- Restructured quiz: <div class="lesson__question"> with always-visible options
   and a <details class="lesson__answer-toggle"> wrapping the explanation only.
   The student reads the prompt, considers the options, then clicks to reveal the why. */
div.lesson__question {
  padding: var(--s-4) var(--s-5) 0;
}
.lesson__question__prompt {
  font-weight: 500;
  font-size: 15px;
  line-height: 1.5;
  margin: 0 0 var(--s-3);
  color: var(--color-ink);
}
div.lesson__question .lesson__question__options,
div.lesson__question ol[type="A"] {
  margin: 0 0 var(--s-3);
}
div.lesson__question ol[type="A"] {
  padding-left: var(--s-5);
  list-style: upper-alpha;
}
div.lesson__question ol[type="A"] li {
  padding: var(--s-1) 0;
  font-size: 15px;
  color: var(--color-ink-80);
}
.lesson__answer-toggle {
  border-top: 1px solid var(--color-rule);
  margin: 0 calc(-1 * var(--s-5));
  background: var(--color-paper-warm);
}
.lesson__answer-toggle > summary {
  padding: var(--s-3) var(--s-5);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-ember);
  position: relative;
  transition: color 140ms var(--ease);
}
.lesson__answer-toggle > summary::-webkit-details-marker { display: none; }
.lesson__answer-toggle > summary::after {
  content: " +";
  font-family: var(--font-mono);
}
.lesson__answer-toggle[open] > summary::after {
  content: " –";
}
.lesson__answer-toggle > summary:hover { color: var(--color-ember-dark, var(--color-ember)); }
.lesson__answer-toggle .lesson__answer,
.lesson__answer-toggle > p.lesson__answer {
  border-top: 1px solid var(--color-rule);
}

.lesson__instructor-note {
  background: var(--color-ink);
  color: var(--color-paper);
  border-radius: 6px;
  padding: var(--s-6);
  margin: var(--s-7) 0 0;
}
.lesson__instructor-note h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(250, 250, 247, 0.7);
  margin: 0 0 var(--s-3);
  font-weight: 600;
  font-family: var(--font-body);
}
.lesson__instructor-note p {
  color: rgba(250, 250, 247, 0.85);
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
}
/* Inline emphasis inside dark callouts must inherit, not fall back to the
   global ink color which would render dark-on-dark and disappear. */
.lesson__instructor-note em,
.lesson__instructor-note strong,
.lesson__instructor-note a {
  color: inherit;
}
.lesson__instructor-note a {
  text-decoration-color: rgba(250, 250, 247, 0.5);
}
.lesson__instructor-note a:hover {
  color: var(--color-ember-10, #fbe9e0);
  text-decoration-color: var(--color-ember-10, #fbe9e0);
}

.preview-banner {
  background: var(--color-ember);
  color: var(--color-paper);
  padding: var(--s-3) 0;
  font-size: 13px;
  text-align: center;
}
.preview-banner a {
  color: var(--color-paper);
  text-decoration: underline;
  font-weight: 500;
}
.preview-banner a:hover { color: rgba(250, 250, 247, 0.85); }

.lesson-cta {
  background: var(--color-paper-warm);
  border: 1px solid var(--color-rule);
  border-radius: 8px;
  padding: var(--s-7);
  margin-top: var(--s-8);
  text-align: center;
}
.lesson-cta h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  margin: 0 0 var(--s-3);
  max-width: 28ch;
  margin-left: auto;
  margin-right: auto;
}
.lesson-cta p {
  max-width: 56ch;
  margin: 0 auto var(--s-5);
  color: var(--color-ink-80);
}
.lesson-cta__ctas {
  display: flex;
  gap: var(--s-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- Credit page components ------------------------------- */

.credit-glance {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--s-4);
  padding: var(--s-6);
  background: var(--color-paper-warm);
  border: 1px solid var(--color-rule);
  border-radius: 8px;
  margin: var(--s-5) 0 var(--s-7);
}
.credit-glance__stat {
  text-align: center;
}
.credit-glance__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 500;
  color: var(--color-ember);
  line-height: 1;
  display: block;
  margin-bottom: var(--s-2);
}
.credit-glance__label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-60);
  font-weight: 500;
}

.credit-table-wrap {
  overflow-x: auto;
  margin: var(--s-5) 0;
  border: 1px solid var(--color-rule);
  border-radius: 6px;
}
.credit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--color-paper);
}
.credit-table th,
.credit-table td {
  padding: var(--s-3) var(--s-4);
  text-align: left;
  border-bottom: 1px solid var(--color-rule);
}
.credit-table thead th {
  background: var(--color-paper-deep);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-60);
}
.credit-table tr:last-child td { border-bottom: 0; }
.credit-table td.num,
.credit-table th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: 13px;
}
.credit-table tfoot td {
  background: var(--color-paper-warm);
  font-weight: 600;
  border-top: 2px solid var(--color-ink);
}

.transcript-variants {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  margin: var(--s-5) 0;
}
.transcript-variant {
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  background: var(--color-paper);
  overflow: hidden;
}
.transcript-variant__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-5);
  background: var(--color-paper-warm);
  border-bottom: 1px solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-60);
}
.transcript-variant__body {
  padding: var(--s-5);
  font-size: 15px;
  line-height: 1.6;
}
.transcript-variant__body strong {
  font-weight: 600;
  color: var(--color-ink);
}
.transcript-variant__body p:last-child { margin-bottom: 0; }

.rubric-preview {
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--s-5);
  margin: var(--s-5) 0;
}
.rubric-preview ol {
  padding-left: var(--s-5);
  margin: 0;
  columns: 2;
  column-gap: var(--s-6);
}
.rubric-preview li {
  padding: var(--s-1) 0;
  font-size: 14px;
  line-height: 1.5;
  break-inside: avoid;
}

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--s-4);
  margin: var(--s-5) 0;
}
.download-card {
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--s-5);
  display: flex;
  flex-direction: column;
}
.download-card__kind {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ember-dark);
  background: var(--color-ember-10);
  padding: 2px 6px;
  border-radius: 3px;
  align-self: flex-start;
  margin-bottom: var(--s-3);
}
.download-card h3 {
  font-size: 17px;
  margin: 0 0 var(--s-2);
  line-height: 1.3;
}
.download-card p {
  font-size: 14px;
  color: var(--color-ink-80);
  margin: 0 0 var(--s-4);
  line-height: 1.5;
  flex-grow: 1;
}

.portfolio-list {
  background: var(--color-paper-deep);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--s-5);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-80);
  overflow-x: auto;
}
.portfolio-list code {
  color: var(--color-ember-dark);
  background: transparent;
  padding: 0;
}

.parent-note {
  background: var(--color-paper-warm);
  border-left: 3px solid var(--color-ink);
  padding: var(--s-5) var(--s-6);
  margin: var(--s-6) 0;
  border-radius: 0 6px 6px 0;
}
.parent-note h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-60);
  margin: 0 0 var(--s-3);
  font-weight: 600;
}
.parent-note ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.parent-note li {
  position: relative;
  padding-left: var(--s-5);
  margin-bottom: var(--s-3);
  font-size: 15px;
  line-height: 1.6;
}
.parent-note li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-ink-60);
}
.parent-note li:last-child { margin-bottom: 0; }

/* ---- Printable rubric / one-pager pages ------------------- */

.printable {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.5;
}
.printable .print-toolbar {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--s-3) 0;
  font-size: 13px;
}
.printable .print-toolbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.printable .print-toolbar a,
.printable .print-toolbar button {
  color: var(--color-paper);
  background: transparent;
  border: 1px solid rgba(250, 250, 247, 0.3);
  border-radius: 4px;
  padding: 6px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 140ms var(--ease);
}
.printable .print-toolbar a:hover,
.printable .print-toolbar button:hover {
  border-color: var(--color-ember);
  color: var(--color-ember);
}

.printable-doc {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--s-8) var(--s-6) var(--s-9);
  background: #fff;
}
.printable-doc h1 {
  font-size: 28px;
  margin: 0 0 var(--s-2);
  letter-spacing: -0.005em;
}
.printable-doc .doc-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-60);
  letter-spacing: 0.04em;
  margin: 0 0 var(--s-6);
  padding-bottom: var(--s-4);
  border-bottom: 1px solid var(--color-rule);
}
.printable-doc .doc-meta span + span::before {
  content: "·";
  margin: 0 var(--s-2);
}
.printable-doc h2 {
  font-size: 18px;
  margin: var(--s-6) 0 var(--s-3);
}
.printable-doc p {
  font-size: 14px;
  margin: 0 0 var(--s-3);
}
.printable-doc .fill-line {
  display: inline-block;
  border-bottom: 1px solid var(--color-ink);
  min-width: 200px;
  height: 1.2em;
  vertical-align: baseline;
  margin: 0 4px;
}

.rubric-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  margin: var(--s-4) 0;
}
.rubric-table th,
.rubric-table td {
  border: 1px solid var(--color-rule);
  padding: 8px 10px;
  vertical-align: top;
  line-height: 1.45;
}
.rubric-table th {
  background: var(--color-paper-warm);
  font-weight: 600;
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-60);
}
.rubric-table td.num {
  width: 28px;
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 500;
}
.rubric-table td.pass {
  width: 80px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--color-ink-60);
}
.rubric-table td.notes {
  width: 140px;
  background: var(--color-paper);
}
.rubric-table .criterion-name { font-weight: 600; display: block; margin-bottom: 3px; color: var(--color-ink); }
.rubric-table .criterion-desc { font-size: 11.5px; color: var(--color-ink-80); }

.signoff-block {
  border: 1px solid var(--color-ink);
  border-radius: 4px;
  padding: var(--s-5);
  margin: var(--s-5) 0 0;
  font-size: 13px;
  line-height: 1.8;
}
.signoff-block .signoff-row {
  display: flex;
  gap: var(--s-4);
  margin-bottom: var(--s-2);
  flex-wrap: wrap;
}
.signoff-block .signoff-row label {
  font-weight: 600;
  white-space: nowrap;
  min-width: 120px;
}
.signoff-block .signoff-row .fill-line {
  flex-grow: 1;
  min-width: 140px;
}
.signoff-block .result {
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--color-rule);
}

@media print {
  .print-toolbar, .site-header, .site-footer { display: none !important; }
  .printable-doc {
    max-width: 100%;
    padding: 0;
    margin: 0;
  }
  body { background: #fff; color: #000; font-size: 11pt; }
  .rubric-table { page-break-inside: auto; }
  .rubric-table tr { page-break-inside: avoid; }
  .signoff-block { page-break-inside: avoid; }
  a { text-decoration: none; color: #000; }
}

/* ---- Motion preferences ------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
}

/* =============================================================
   Auth + dashboard UI (Phase 1 — login, signup, /dashboard/)
   ============================================================= */

/* ---- Header auth-state slot ---- */
#auth-state { font-size: 14px; }
.auth-state__link {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 1px;
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}
.auth-state__link:hover {
  color: var(--color-ember);
  border-color: var(--color-ember);
}
.auth-state__sep { color: var(--color-ink-30); margin: 0 4px; }
.auth-state__signout {
  background: transparent;
  border: none;
  color: var(--color-ink-60);
  font: inherit;
  cursor: pointer;
  padding: 0;
}
.auth-state__signout:hover { color: var(--color-ember); }

/* ---- Auth tabs (login page) ---- */
.auth-tabs {
  display: flex;
  gap: var(--s-2);
  margin: 0 0 var(--s-5);
  border-bottom: 1px solid var(--color-rule);
}
.auth-tabs__tab {
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  font: inherit;
  font-weight: 500;
  font-size: 14px;
  padding: var(--s-2) var(--s-4);
  margin-bottom: -1px;
  cursor: pointer;
  color: var(--color-ink-60);
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}
.auth-tabs__tab:hover { color: var(--color-ink); }
.auth-tabs__tab--active {
  color: var(--color-ember);
  border-bottom-color: var(--color-ember);
}

/* ---- Status banners (login/signup feedback) ---- */
.auth-status {
  margin-top: var(--s-4);
  padding: var(--s-3) var(--s-4);
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.5;
  border: 1px solid var(--color-rule);
  background: var(--color-paper-warm);
  color: var(--color-ink);
}
.auth-status--success {
  border-color: #2E5A3E;
  background: #E8F1EB;
  color: #1A3424;
}
.auth-status--error {
  border-color: var(--color-ember);
  background: #FBE9E0;
  color: var(--color-ember-dark, var(--color-ember));
}
.auth-status--info {
  border-color: var(--color-rule);
  background: var(--color-paper-warm);
  color: var(--color-ink-80);
}

/* ---- Dashboard ---- */
.dashboard-resume {
  margin-top: var(--s-5);
  padding: var(--s-5);
  border: 1px solid var(--color-ember);
  border-radius: 6px;
  background: var(--color-paper-warm);
}
.dashboard-resume__label {
  margin: 0 0 var(--s-2) 0;
  color: var(--color-ember);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.dashboard-resume__lesson {
  font-size: 24px;
  margin: 0 0 var(--s-1) 0;
}
.dashboard-resume__lesson a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 2px solid var(--color-ember);
}
.dashboard-resume__lesson a:hover { color: var(--color-ember); }
.dashboard-resume__meta {
  font-size: 13px;
  margin: 0;
}

.dashboard-empty {
  margin-top: var(--s-5);
  padding: var(--s-5);
  border: 1px dashed var(--color-rule);
  border-radius: 6px;
  background: var(--color-paper);
}

.dashboard-modules { display: grid; gap: var(--s-3); }
.dashboard-module-row {
  padding: var(--s-4);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  background: var(--color-paper);
}
.dashboard-module-row__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-3);
  align-items: baseline;
  margin-bottom: var(--s-3);
}
.dashboard-module-row__num {
  color: var(--color-ember);
  font-weight: 500;
}
.dashboard-module-row__title {
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
}
.dashboard-module-row__title:hover { color: var(--color-ember); }
.dashboard-module-row__count {
  font-size: 13px;
  white-space: nowrap;
}
.dashboard-module-row__bar {
  height: 4px;
  background: var(--color-rule);
  border-radius: 2px;
  overflow: hidden;
}
.dashboard-module-row__bar-fill {
  height: 100%;
  background: var(--color-ember);
  transition: width 240ms var(--ease);
}

.dashboard-account {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--s-2) var(--s-5);
  margin: var(--s-4) 0;
}
.dashboard-account dt {
  font-weight: 500;
  color: var(--color-ink-60);
  font-size: 13px;
}
.dashboard-account dd { margin: 0; color: var(--color-ink); }

/* ---- Lesson-level progress checkmark (Phase 2) ---- */
.lesson-complete-cta {
  margin: var(--s-6) 0;
  padding: var(--s-4) var(--s-5);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  background: var(--color-paper-warm);
  display: flex;
  align-items: center;
  gap: var(--s-3);
  flex-wrap: wrap;
}
.lesson-complete-cta--done {
  border-color: #2E5A3E;
  background: #E8F1EB;
}
.lesson-complete-cta__btn {
  flex-shrink: 0;
}

/* ---- Lesson three-stage pattern (Read / Try / Check) -------
   Validated 2026-05-03. Reference: /modules/3/lesson-2/.
   Lessons opt in by wrapping content in <section class="stage">
   blocks and including the .stage-progress nav + .stage-gate
   button. JS lives in scripts.js (auto-bails on non-stage pages).
   ----------------------------------------------------------- */

/* Sticky stage progress, sits just under the site header */
.stage-progress {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-ink-10);
  backdrop-filter: saturate(120%) blur(6px);
}
.stage-progress__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--s-3) var(--s-5);
  display: flex;
  align-items: center;
  gap: var(--s-4);
}
.stage-progress__label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  font-weight: 600;
  flex: 0 0 auto;
}
.stage-progress__bar {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.stage-progress__step {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: 6px var(--s-3);
  border-radius: 999px;
  border: 1px solid var(--color-ink-10);
  background: transparent;
  color: var(--color-ink-60);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: all 160ms var(--ease);
  min-width: 0;
}
.stage-progress__step:hover {
  border-color: var(--color-ink-30);
  color: var(--color-ink);
}
.stage-progress__step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--color-ink-05);
  color: var(--color-ink-60);
  font-size: 12px;
  font-weight: 600;
  flex: 0 0 auto;
}
.stage-progress__step__title {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.stage-progress__step.is-current {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-paper);
}
.stage-progress__step.is-current .stage-progress__step__num {
  background: var(--color-paper);
  color: var(--color-ink);
}
.stage-progress__step.is-done {
  border-color: var(--color-ember);
  color: var(--color-ember-dark);
  background: var(--color-ember-10);
}
.stage-progress__step.is-done .stage-progress__step__num {
  background: var(--color-ember);
  color: var(--color-paper);
}
.stage-progress__step.is-done .stage-progress__step__num::after {
  content: "\2713";
}
.stage-progress__step.is-done .stage-progress__step__num__text {
  display: none;
}

/* Per-stage banner at the top of each stage */
.stage {
  scroll-margin-top: 90px;
  padding-top: var(--s-6);
}
.stage-banner {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  flex-wrap: wrap;
  padding: var(--s-3) 0;
  margin-bottom: var(--s-5);
  border-top: 2px solid var(--color-ink);
  border-bottom: 1px solid var(--color-ink-10);
}
.stage-banner__num {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  font-weight: 600;
}
.stage-banner__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.stage-banner__meta {
  font-size: 13px;
  color: var(--color-ink-60);
  margin-left: auto;
}

/* Soft "transition" between stages (sits at the close of a stage) */
.stage-transition {
  margin: var(--s-7) 0 0 0;
  padding: var(--s-5);
  border: 1px dashed var(--color-ink-30);
  border-radius: var(--radius-md);
  background: var(--color-paper-warm);
  text-align: center;
}
.stage-transition__eyebrow {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-60);
  font-weight: 600;
  margin-bottom: var(--s-2);
}
.stage-transition__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 var(--s-2) 0;
}
.stage-transition__body {
  font-size: 14px;
  color: var(--color-ink-60);
  max-width: 56ch;
  margin: 0 auto;
}

/* The gate. Stage 3 is dimmed (but reachable) until the gate
   is clicked. Respects motivated learners while still adding
   the chunking gate that captures completion intent. */
.stage--locked .stage-banner,
.stage--locked .lesson__callout,
.stage--locked .lesson__quiz,
.stage--locked .lesson__activity,
.stage--locked .lesson__reflection,
.stage--locked .lesson__checkpoint {
  opacity: 0.55;
  filter: grayscale(0.2);
  transition: opacity 280ms var(--ease), filter 280ms var(--ease);
}
.stage--locked .stage-banner__title::after {
  content: "  \1F512";
  font-size: 14px;
  opacity: 0.6;
}
.stage-gate {
  margin: var(--s-6) 0 var(--s-2) 0;
  padding: var(--s-5);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  display: flex;
  align-items: center;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.stage-gate__copy { flex: 1 1 280px; min-width: 0; }
.stage-gate__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 var(--s-1) 0;
}
.stage-gate__body {
  font-size: 14px;
  color: var(--color-ink-60);
  margin: 0;
}
.stage-gate__btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 12px 20px;
  background: var(--color-ember);
  color: var(--color-paper);
  border: 1px solid var(--color-ember);
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background 160ms var(--ease), border-color 160ms var(--ease);
}
.stage-gate__btn:hover {
  background: var(--color-ember-dark);
  border-color: var(--color-ember-dark);
}
.stage-gate__btn[aria-pressed="true"] {
  background: var(--color-ink);
  border-color: var(--color-ink);
  cursor: default;
}

/* Tighter mobile layout for the sticky bar */
@media (max-width: 720px) {
  .stage-progress__inner { padding: var(--s-2) var(--s-4); gap: var(--s-2); }
  .stage-progress__label { display: none; }
  .stage-progress__step__title { display: none; }
  .stage-progress__step { padding: 6px 10px; flex: 0 0 auto; }
}

/* ---- Print ------------------------------------------------- */

@media print {
  .site-header, .site-footer, .hero__ctas, .nav__toggle { display: none; }
  body { background: #fff; color: #000; }
  /* Print: collapse the stage gate UI; everything is reachable on paper */
  .stage-progress, .stage-gate { display: none; }
  .stage--locked .stage-banner,
  .stage--locked .lesson__callout,
  .stage--locked .lesson__quiz,
  .stage--locked .lesson__activity,
  .stage--locked .lesson__reflection,
  .stage--locked .lesson__checkpoint { opacity: 1; filter: none; }
  .stage--locked .stage-banner__title::after { content: ""; }
}

/* ---- Copy-to-clipboard affordance for long commands -------- */

.cmd-copy {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  vertical-align: baseline;
  white-space: nowrap;
  max-width: 100%;
}
.cmd-copy > .mono {
  white-space: normal;
}
.cmd-copy__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-rule);
  border-radius: 3px;
  color: var(--color-ink-60);
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  line-height: 1;
  flex-shrink: 0;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.cmd-copy__btn:hover {
  background: var(--color-paper-warm);
  color: var(--color-ember);
  border-color: var(--color-ember);
}
.cmd-copy__btn:focus-visible {
  outline: 2px solid var(--color-ember);
  outline-offset: 1px;
}
.cmd-copy__btn.is-copied {
  background: var(--color-ember);
  color: #fff;
  border-color: var(--color-ember);
}
.cmd-copy__btn .cmd-copy__icon { width: 11px; height: 11px; pointer-events: none; }
.cmd-copy__btn .cmd-copy__check { display: none; }
.cmd-copy__btn.is-copied .cmd-copy__icon { display: none; }
.cmd-copy__btn.is-copied .cmd-copy__check { display: inline; }

@media print {
  .cmd-copy__btn { display: none; }
}