/* ==========================================================================
   pactkeep — marketing site
   Built against PACTKEEP-DESIGN-SYSTEM.md v1.0
   Every colour comes from §16.1. Every spacing value is on the 4px scale (§7.1).
   ========================================================================== */

/* ---- §16.1 Tokens ------------------------------------------------------ */
:root {
  --pk-ink:            #0A0A0A;
  --pk-paper:          #FFFFFF;
  --pk-blue:           #1B34C4;
  --pk-yellow:         #FFD400;
  --pk-red:            #D62410;

  --pk-blue-hover:     #152BA6;
  --pk-red-hover:      #B31D0D;
  --pk-blue-bright:    #5B7BFF;
  --pk-red-bright:     #FF6A55;

  --pk-blue-subtle:    #E8EBFA;
  --pk-yellow-subtle:  #FFF6CC;
  --pk-red-subtle:     #FBE4E1;

  --pk-ink-900: #0A0A0A;
  --pk-ink-800: #1A1A1A;
  --pk-ink-700: #2E2E2E;
  --pk-ink-600: #4A4A4A;
  --pk-ink-500: #6B6B6B;
  --pk-ink-400: #8E8E8E;
  --pk-ink-300: #C9C9C7;
  --pk-ink-200: #E4E4E1;
  --pk-ink-100: #F4F4F2;

  --pk-font-display: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --pk-font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --pk-font-mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --pk-tracking-display: -0.035em;
  --pk-tracking-heading: -0.02em;
  --pk-tracking-label:    0.08em;

  --pk-space-1:  4px;   --pk-space-2:  8px;   --pk-space-3:  12px;
  --pk-space-4:  16px;  --pk-space-5:  20px;  --pk-space-6:  24px;
  --pk-space-8:  32px;  --pk-space-10: 40px;  --pk-space-12: 48px;
  --pk-space-16: 64px;  --pk-space-20: 80px;  --pk-space-24: 96px;
  --pk-space-32: 128px;

  --pk-radius-none: 0;
  --pk-radius-sm:   3px;
  --pk-border-width: 1px;
  --pk-state-edge:   3px;

  --pk-dur-instant: 100ms;
  --pk-dur-fast:    160ms;
  --pk-dur-base:    240ms;
  --pk-dur-slow:    400ms;
  --pk-ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --pk-ease-out:      cubic-bezier(0, 0, 0, 1);
  --pk-ease-in:       cubic-bezier(0.4, 0, 1, 1);

  --pk-container: 1280px;
  --pk-measure:   68ch;
  --pk-page-margin: var(--pk-space-6);
  --pk-nav-height:  72px;

  /* The hexagon in the keep. Varies per page; the keep itself never does. */
  --pk-mark: var(--pk-yellow);
}

body.page-how { --pk-mark: var(--pk-blue); }

/* ---- §16.1 Dark theme — the marketing canvas (§5.1) -------------------- */
[data-theme="dark"] {
  --pk-canvas:         var(--pk-ink-900);
  --pk-surface:        var(--pk-ink-800);
  --pk-surface-hover:  var(--pk-ink-700);
  --pk-border:         #2A2A2A;
  --pk-border-strong:  #3D3D3D;
  --pk-text-primary:   var(--pk-paper);
  --pk-text-secondary: #A3A3A3;
  --pk-text-tertiary:  var(--pk-ink-400);
  --pk-text-inverse:   var(--pk-ink-900);
  --pk-focus-ring:     var(--pk-paper);
}

@media (min-width: 1024px) {
  :root { --pk-page-margin: var(--pk-space-12); }
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--pk-canvas);
  color: var(--pk-text-primary);
  font-family: var(--pk-font-body);
  font-size: 1rem;
  line-height: 1.6;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

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

::selection { background: var(--pk-yellow); color: var(--pk-ink-900); }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--pk-focus-ring);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--pk-space-4);
  top: -100px;
  z-index: 80;
  background: var(--pk-paper);
  color: var(--pk-ink-900);
  padding: var(--pk-space-3) var(--pk-space-4);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--pk-radius-sm);
  transition: top var(--pk-dur-fast) var(--pk-ease-standard);
}
.skip-link:focus { top: var(--pk-space-4); }

.u-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;
}

/* ---- §6.3 Type scale --------------------------------------------------- */
.display-xl,
.display-lg,
.display-md,
.heading-lg,
.heading-md {
  font-family: var(--pk-font-display);
  margin: 0;
  text-wrap: balance;
}

.display-xl {
  font-size: clamp(3.25rem, 8vw, 7rem);
  font-weight: 400;
  line-height: 1.00;
  letter-spacing: -0.035em;
}
.display-lg {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.display-md {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.10;
  letter-spacing: -0.025em;
}
.heading-lg {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.heading-md {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.body-lg { font-size: 1.125rem; line-height: 1.55; margin: 0; }
.body    { font-size: 1rem;     line-height: 1.6;  margin: 0; }
.caption { font-size: 0.8125rem; line-height: 1.45; margin: 0; }

.eyebrow {
  font-family: var(--pk-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  margin: 0;
}

/* The in-page aside — lowercase, mono, tertiary. §13.3 */
.aside-note {
  font-family: var(--pk-font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--pk-text-tertiary);
  margin: 0;
}

.mono { font-family: var(--pk-font-mono); font-variant-numeric: tabular-nums; }

.measure { max-width: var(--pk-measure); }

.text-secondary { color: var(--pk-text-secondary); }

/* ---- Layout ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--pk-container);
  margin-inline: auto;
  padding-inline: var(--pk-page-margin);
}

.section {
  padding-block: var(--pk-space-16);
}
@media (min-width: 1024px) {
  .section { padding-block: var(--pk-space-24); }
}

/* §13.2 Full-bleed colour block — one idea, large type */
.block {
  padding-block: var(--pk-space-20);
}
@media (min-width: 1024px) {
  .block { padding-block: var(--pk-space-32); }
}
.block--yellow { background: var(--pk-yellow); color: var(--pk-ink-900); }
.block--blue   { background: var(--pk-blue);   color: var(--pk-paper); }

.block--yellow .eyebrow,
.block--yellow .aside-note { color: var(--pk-ink-900); }
.block--yellow .block__body { color: var(--pk-ink-900); }
.block--blue .block__body { color: var(--pk-paper); }

/* §13.2 Paper section — a contract is a white page */
.section--paper {
  background: var(--pk-paper);
  color: var(--pk-ink-900);
}
.section--paper .eyebrow { color: var(--pk-ink-500); }
.section--paper .body,
.section--paper .body-lg { color: var(--pk-ink-600); }

.rule {
  border: 0;
  border-top: var(--pk-border-width) solid var(--pk-border);
  margin: 0;
}

/* ---- §11.6 Marketing nav ---------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--pk-nav-height);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: var(--pk-border-width) solid transparent;
  transition: background var(--pk-dur-fast) var(--pk-ease-standard),
              border-color var(--pk-dur-fast) var(--pk-ease-standard);
}
.nav.is-scrolled {
  background: var(--pk-ink-900);
  border-bottom-color: var(--pk-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--pk-space-6);
  width: 100%;
}
.nav__links {
  display: none;
  align-items: center;
  gap: var(--pk-space-8);
}
@media (min-width: 768px) {
  .nav__links { display: flex; }
}
.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--pk-text-primary);
  padding-block: var(--pk-space-2);
  transition: color var(--pk-dur-instant) var(--pk-ease-standard);
}
.nav__link:hover { color: var(--pk-text-secondary); }
.nav__link[aria-current="page"] {
  box-shadow: inset 0 -2px 0 var(--pk-paper);
}

.nav__toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--pk-space-2);
  min-height: 44px;
  padding: 0 var(--pk-space-2);
  background: none;
  border: 0;
  color: var(--pk-paper);
  font-family: var(--pk-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
  cursor: pointer;
}
@media (min-width: 768px) {
  .nav__toggle { display: none; }
}

/* Mobile overlay panel — §11.6 */
.nav-panel {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--pk-ink-900);
  display: flex;
  flex-direction: column;
  padding: var(--pk-space-6) var(--pk-page-margin) var(--pk-space-12);
  transform: translateY(-100%);
  transition: transform var(--pk-dur-base) var(--pk-ease-standard);
  visibility: hidden;
}
.nav-panel.is-open { transform: translateY(0); visibility: visible; }
.nav-panel[hidden] { display: none; }
.nav-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: calc(var(--pk-nav-height) - var(--pk-space-6));
}
.nav-panel__links {
  display: flex;
  flex-direction: column;
  gap: var(--pk-space-6);
  margin-top: var(--pk-space-12);
}
.nav-panel__link {
  font-family: var(--pk-font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.10;
  letter-spacing: -0.025em;
  text-decoration: none;
}
.nav-panel__cta { margin-top: var(--pk-space-12); }

/* ---- §3 Logo lockup ---------------------------------------------------- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--pk-space-3);
  text-decoration: none;
  color: inherit;
  /* §3.3 clear space */
  padding: var(--pk-space-2);
  margin: calc(var(--pk-space-2) * -1);
}
.logo__mark { width: auto; height: 22px; flex: none; }
.logo__hex { fill: var(--pk-mark); }
.logo__word {
  font-family: var(--pk-font-display);
  font-weight: 500;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-transform: lowercase;
}
.logo--lg .logo__mark { height: 30px; }
.logo--lg .logo__word { font-size: 1.625rem; }

/* ---- §11.1 Buttons ----------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--pk-space-2);
  height: 44px;
  padding-inline: var(--pk-space-5);
  font-family: var(--pk-font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  border: 0;
  border-radius: var(--pk-radius-sm);
  cursor: pointer;
  transition: background-color var(--pk-dur-instant) var(--pk-ease-standard),
              color var(--pk-dur-instant) var(--pk-ease-standard),
              transform var(--pk-dur-instant) var(--pk-ease-standard);
}
.btn:active { transform: translateY(1px); }

.btn--xl { height: 52px; padding-inline: var(--pk-space-8); font-size: 1rem; }
.btn--md { height: 36px; padding-inline: var(--pk-space-4); font-size: 0.875rem; }

.btn--inverse { background: var(--pk-paper); color: var(--pk-ink-900); }
.btn--inverse:hover { background: var(--pk-ink-200); }

.btn--ink { background: var(--pk-ink-900); color: var(--pk-paper); }
.btn--ink:hover { background: var(--pk-ink-700); }

.btn--outline {
  background: transparent;
  color: var(--pk-paper);
  box-shadow: inset 0 0 0 1px var(--pk-border-strong);
}
.btn--outline:hover { background: var(--pk-surface-hover); }

.btn--block { width: 100%; }

/* Secondary text link — §13.3 one CTA, one link */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: var(--pk-space-2);
  min-height: 44px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--pk-paper);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  transition: color var(--pk-dur-instant) var(--pk-ease-standard);
}
.text-link:hover { color: var(--pk-blue-bright); }
.section--paper .text-link { color: var(--pk-blue); }
.block--yellow .text-link { color: var(--pk-ink-900); }

/* ---- §10 Option A — the lifecycle ruler (signature device) ------------- */
.ruler {
  margin-top: var(--pk-space-16);
}
.ruler__track {
  position: relative;
  display: flex;
  width: 100%;
  height: 56px;
}
@media (min-width: 1024px) {
  .ruler__track { height: 96px; }
}
.ruler__seg {
  height: 100%;
  border-radius: var(--pk-radius-none);
  transform: scaleX(0);
  transform-origin: left center;
  animation: pk-seg-fill var(--pk-seg-dur, 400ms) var(--pk-ease-out) forwards;
  animation-delay: var(--pk-seg-delay, 0ms);
}
.ruler__seg--executed { flex: 0 0 12%;  background: var(--pk-ink-300); --pk-seg-dur: 96ms;  --pk-seg-delay: 0ms; }
.ruler__seg--force    { flex: 0 0 48%; background: var(--pk-blue);    --pk-seg-dur: 624ms; --pk-seg-delay: 96ms; }
.ruler__seg--notice   { flex: 0 0 22%; background: var(--pk-yellow);  --pk-seg-dur: 264ms; --pk-seg-delay: 720ms; }
.ruler__seg--renewal  { flex: 0 0 18%; background: var(--pk-red);     --pk-seg-dur: 216ms; --pk-seg-delay: 984ms; }

@keyframes pk-seg-fill { to { transform: scaleX(1); } }

.ruler__today {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 62%;
  width: 2px;
  background: var(--pk-paper);
  opacity: 0;
  animation: pk-fade-in var(--pk-dur-slow) var(--pk-ease-out) forwards;
  animation-delay: 1200ms;
}
.ruler__today span {
  position: absolute;
  top: calc(100% + var(--pk-space-2));
  left: 0;
  font-family: var(--pk-font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
  color: var(--pk-paper);
  white-space: nowrap;
}

.ruler__labels {
  display: flex;
  width: 100%;
  margin-top: var(--pk-space-8);
  opacity: 0;
  animation: pk-fade-in var(--pk-dur-slow) var(--pk-ease-out) forwards;
  animation-delay: 1200ms;
}
.ruler__label {
  padding-right: var(--pk-space-3);
  border-top: 1px solid var(--pk-border);
  padding-top: var(--pk-space-3);
  font-family: var(--pk-font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  line-height: 1.4;
}
.ruler__label b {
  display: block;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
  color: var(--pk-text-primary);
}
.ruler__label span {
  display: block;
  margin-top: 2px;
  color: var(--pk-text-tertiary);
  white-space: nowrap;
}
/* segments under 4% collapse into their neighbour (§10) — here the first
   two labels merge below 640px so nothing renders as a sliver */
.ruler__label--executed { flex: 0 0 12%; }
.ruler__label--force    { flex: 0 0 48%; }
.ruler__label--notice   { flex: 0 0 22%; }
.ruler__label--renewal  { flex: 0 0 18%; }

@media (max-width: 1023px) {
  .ruler__labels { display: grid; grid-template-columns: 1fr 1fr; gap: var(--pk-space-4); }
  .ruler__label { flex: none; }
}

@keyframes pk-fade-in { to { opacity: 1; } }

/* Static ruler (no page-load animation) for secondary pages */
.ruler--static .ruler__seg { transform: scaleX(1); animation: none; }
.ruler--static .ruler__labels,
.ruler--static .ruler__today { opacity: 1; animation: none; }
.ruler--sm { margin-top: var(--pk-space-8); }
.ruler--sm .ruler__track { height: 24px; }
.ruler--sm .ruler__labels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--pk-space-4);
  margin-top: var(--pk-space-6);
}
@media (min-width: 768px) {
  .ruler--sm .ruler__labels { grid-template-columns: repeat(4, 1fr); }
}
.ruler--sm .ruler__label { flex: none; }

/* ---- §11.3 State chip -------------------------------------------------- */
.chip {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding-inline: 6px;
  border-radius: var(--pk-radius-none);
  font-family: var(--pk-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
  white-space: nowrap;
}
.chip--active { background: var(--pk-blue);   color: var(--pk-paper); }
.chip--notice { background: var(--pk-yellow); color: var(--pk-ink-900); }
.chip--urgent { background: var(--pk-red);    color: var(--pk-paper); }
.chip--draft  { background: var(--pk-ink-300); color: var(--pk-ink-900); }
/* §4.4 the compound state. The full 45° split is kept for the lifecycle
   device; on a chip the label must stay legible, so the wedge sits beside
   the text on a blue fill instead of behind it. See changelog. */
.chip--renegotiating {
  background: var(--pk-blue);
  color: var(--pk-paper);
  padding-left: 4px;
}
.chip--renegotiating::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-right: 5px;
  flex: none;
  background: linear-gradient(135deg, var(--pk-yellow) 0 50%, var(--pk-paper) 50% 100%);
}

/* ---- §11.4 Cards ------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: var(--pk-space-6);
  margin-top: var(--pk-space-12);
}
@media (min-width: 768px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .card-grid--2 { grid-template-columns: repeat(2, 1fr); }
}

.card {
  background: var(--pk-surface);
  border: var(--pk-border-width) solid var(--pk-border);
  border-radius: var(--pk-radius-sm);
  padding: var(--pk-space-6);
  border-top: var(--pk-state-edge) solid var(--pk-border);
}
.card--active { border-top-color: var(--pk-blue); }
.card--notice { border-top-color: var(--pk-yellow); }
.card--draft  { border-top-color: var(--pk-ink-300); }
.card__title { margin: var(--pk-space-4) 0 var(--pk-space-3); }
.card__body  { color: var(--pk-text-secondary); }

/* ---- Hero -------------------------------------------------------------- */
.hero {
  padding-top: var(--pk-space-16);
  padding-bottom: var(--pk-space-16);
}
@media (min-width: 1024px) {
  .hero { padding-top: var(--pk-space-20); padding-bottom: var(--pk-space-16); }
}

/* Full-bleed image hero. No scrim, no gradient (§18.5) — the type sits over
   the near-black sky, which measures above 12:1 against paper. */
.hero--image {
  position: relative;
  overflow: hidden;
  background: var(--pk-ink-900);
  padding-top: 0;
  padding-bottom: 0;
}
.hero__media {
  display: block;
  position: relative;
  height: 300px;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% 50%;
}
.hero__content {
  position: relative;
  z-index: 1;
  padding-top: var(--pk-space-12);
  padding-bottom: var(--pk-space-16);
}
/* Over a photograph, secondary greys drop below 4.5:1 — type goes paper. */
.hero--image .hero__eyebrow,
.hero--image .hero__sub { color: var(--pk-paper); }

@media (min-width: 768px) {
  .hero--image {
    display: flex;
    align-items: center;
    min-height: 86vh;
    margin-top: calc(-1 * var(--pk-nav-height));
    padding-top: var(--pk-nav-height);
  }
  .hero__media { position: absolute; inset: 0; height: auto; }
  .hero__media img { object-position: 50% 50%; }
  .hero__content {
    padding-top: var(--pk-space-12);
    padding-bottom: var(--pk-space-24);
    max-width: 100%;
  }
  /* Break the headline after the first sentence so it never crosses the
     bright helmet on the right of the photograph. */
  .hero--image .hero__title { max-width: 11ch; }
  .hero--image .hero__sub { max-width: 34ch; }
}
@media (min-width: 1280px) {
  .hero--image .hero__sub { max-width: 38ch; }
}

.hero__eyebrow { color: var(--pk-text-tertiary); margin-bottom: var(--pk-space-6); }
.hero__title { max-width: 14ch; }
.hero__title--wide { max-width: 22ch; }
.hero__sub {
  margin-top: var(--pk-space-6);
  max-width: 46ch;
  color: var(--pk-text-secondary);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--pk-space-6);
  margin-top: var(--pk-space-10);
}

/* The ruler now stands as its own band directly under the hero */
.section--ruler { padding-block: var(--pk-space-16); }
.section--ruler .ruler { margin-top: var(--pk-space-6); }
@media (min-width: 1024px) {
  .section--ruler { padding-block: var(--pk-space-20); }
}

/* ---- Section heads ----------------------------------------------------- */
.section__head { max-width: 60ch; }
.section__head .eyebrow { color: var(--pk-text-tertiary); margin-bottom: var(--pk-space-4); }
.section__head .aside-note { margin-bottom: var(--pk-space-4); }
.section__lede {
  margin-top: var(--pk-space-6);
  color: var(--pk-text-secondary);
  max-width: var(--pk-measure);
}

/* ---- Paper section: the document (§2.2.2) ------------------------------ */
.doc {
  display: grid;
  gap: var(--pk-space-12);
  margin-top: var(--pk-space-12);
  align-items: start;
}
@media (min-width: 1024px) {
  .doc { grid-template-columns: 1fr 1fr; gap: var(--pk-space-16); }
}
.doc__clause {
  background: var(--pk-ink-100);
  border-left: var(--pk-state-edge) solid var(--pk-blue);
  padding: var(--pk-space-6);
  font-family: var(--pk-font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--pk-ink-900);
}
.doc__ref {
  display: block;
  margin-bottom: var(--pk-space-4);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
  color: var(--pk-ink-500);
}
.doc__terms {
  margin: var(--pk-space-8) 0 0;
  border-top: 1px solid var(--pk-ink-200);
}
.doc__term {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--pk-space-4);
  padding-block: var(--pk-space-3);
  border-bottom: 1px solid var(--pk-ink-200);
}
.doc__term dt {
  font-family: var(--pk-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
  color: var(--pk-ink-500);
}
.doc__term dd {
  margin: 0;
  font-family: var(--pk-font-mono);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  color: var(--pk-ink-900);
}

/* ---- Colour blocks ----------------------------------------------------- */
.block__inner { max-width: 24ch; }
.block__body {
  margin-top: var(--pk-space-6);
  max-width: 54ch;
  font-size: 1.125rem;
  line-height: 1.55;
}
.block__eyebrow { margin-bottom: var(--pk-space-6); }
.block__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pk-space-12);
  margin-top: var(--pk-space-12);
  padding-top: var(--pk-space-6);
  border-top: 1px solid rgba(10, 10, 10, 0.25);
}
.block__stat b {
  display: block;
  font-family: var(--pk-font-mono);
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.block__stat span {
  display: block;
  margin-top: var(--pk-space-2);
  font-family: var(--pk-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  text-transform: uppercase;
}

/* ---- §11.2 Form -------------------------------------------------------- */
.signup { max-width: 420px; margin-top: var(--pk-space-10); }
.field { display: block; }
.field__label {
  display: block;
  margin-bottom: var(--pk-space-2);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--pk-paper);
}
.field__input {
  width: 100%;
  height: 52px;
  padding-inline: var(--pk-space-3);
  background: var(--pk-paper);
  color: var(--pk-ink-900);
  font-family: var(--pk-font-body);
  font-size: 1rem;
  border: 1px solid var(--pk-ink-300);
  border-radius: var(--pk-radius-sm);
}
.field__input::placeholder { color: var(--pk-ink-500); }
.field__input:focus-visible { outline: 2px solid var(--pk-ink-900); outline-offset: 2px; }
.field__input[aria-invalid="true"] { border-color: var(--pk-ink-900); }
.field__error {
  display: none;
  margin-top: var(--pk-space-2);
  font-size: 0.8125rem;
  color: var(--pk-ink-900);
  background: var(--pk-yellow);
  padding: var(--pk-space-1) var(--pk-space-2);
}
.field__error.is-visible { display: inline-block; }
.signup__row { display: flex; flex-wrap: wrap; gap: var(--pk-space-3); align-items: flex-end; }
.signup__row .field { flex: 1 1 220px; }
.signup__note { margin-top: var(--pk-space-4); color: var(--pk-paper); }
.signup__hp { position: absolute; left: -9999px; }

.signup__done { display: none; }
.signup.is-done .signup__form { display: none; }
.signup.is-done .signup__done { display: block; }
.signup__done p { margin-top: var(--pk-space-3); color: var(--pk-paper); }

/* ---- Utilities --------------------------------------------------------- */
.u-mt-8 { margin-top: var(--pk-space-8); }
.section--tight { padding-top: 0; }

/* ---- Steps (how it works) ---------------------------------------------- */
.steps { margin-top: 0; padding: 0; list-style: none; border-top: 1px solid var(--pk-border); }
.step {
  display: grid;
  gap: var(--pk-space-4);
  padding-block: var(--pk-space-12);
  border-bottom: 1px solid var(--pk-border);
}
@media (min-width: 768px) {
  .step { grid-template-columns: 96px 1fr; gap: var(--pk-space-8); }
}
.step__num {
  font-family: var(--pk-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--pk-tracking-label);
  color: var(--pk-text-tertiary);
  padding-top: var(--pk-space-2);
}
.step__body { max-width: var(--pk-measure); }
.step__body .body { margin-top: var(--pk-space-4); color: var(--pk-text-secondary); }
.step__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pk-space-3) var(--pk-space-6);
  margin-top: var(--pk-space-6);
  font-family: var(--pk-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--pk-text-tertiary);
}

/* ---- Footer ------------------------------------------------------------ */
.footer {
  border-top: 1px solid var(--pk-border);
  padding-block: var(--pk-space-12);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pk-space-6);
  align-items: center;
  justify-content: space-between;
}
.footer__links { display: flex; flex-wrap: wrap; gap: var(--pk-space-6); }
.footer__link {
  font-size: 0.875rem;
  color: var(--pk-text-secondary);
  text-decoration: none;
}
.footer__link:hover { color: var(--pk-text-primary); }
.footer__legal {
  width: 100%;
  margin-top: var(--pk-space-8);
  padding-top: var(--pk-space-6);
  border-top: 1px solid var(--pk-border);
  font-family: var(--pk-font-mono);
  font-size: 0.75rem;
  color: var(--pk-text-tertiary);
}

/* ---- §9.2 Scroll reveal — 12px, 400ms, once ---------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity var(--pk-dur-slow) var(--pk-ease-out),
              transform var(--pk-dur-slow) var(--pk-ease-out);
}

/* ---- §9.3 Reduced motion ----------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  /* the lifecycle device renders its final state statically (§9.3) */
  .ruler__seg { transform: scaleX(1); }
  .ruler__labels, .ruler__today { opacity: 1; }
  .reveal { opacity: 1; transform: none; }
}