/* V4.7 PRESENTATION CONTRACT
   Content declares meaning. Recipes select complete templates. Templates own
   width, alignment, spacing, responsive behavior, and state. Public blocks do
   not choose layout and no route gets a private presentation correction.
   Every section uses one shared frame; templates may subdivide it, but they do
   not create a second centered rail inside it. */

@font-face {
  font-family: "Bricolage Grotesque Variable";
  src: url("assets/fonts/bricolage-grotesque-latin.woff2") format("woff2-variations");
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
}

@font-face {
  font-family: "Inter Variable";
  src: url("assets/fonts/inter-latin.woff2") format("woff2-variations");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono Variable";
  src: url("assets/fonts/jetbrains-mono-latin.woff2") format("woff2-variations");
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
}

:root {
  color-scheme: light;

  /* Neutral-first surfaces. Full-width sections use only the canvas, one soft
     neutral separator, or the inverse ending. Evidence and reflection live in
     their components instead of recoloring the whole viewport. */
  --paper: #f5f3ee;
  --surface: #fffefa;
  --surface-soft: #eceae5;
  --surface-mist: #edf0f1;
  --band-soft: #efede8;
  --highlight-tint: #f4e6df;
  --ink: #14252d;
  --muted: #5b686d;
  --line: #dad5cb;
  --line-strong: #b9b2a2;
  --accent: #994c32;
  --accent-strong: #713521;
  --accent-bright: #f0a97c;
  --signal: #356a98;
  --signal-strong: #2a5478;
  --signal-bright: #8fb8ce;
  --inverse: #14252d;
  --inverse-ink: #f3f0e8;
  --inverse-muted: #b4bdb8;
  --success: #356a98;

  --frame: 960px;
  --measure: 76ch;
  --portrait: 304px;
  --gallery-card: 520px;
  --tour-card: 720px;
  --gutter: clamp(20px, 4vw, 32px);

  --space-inline: 8px;
  --space-text: 16px;
  --space-item: 24px;
  --space-group: clamp(32px, 4vw, 48px);
  --space-chapter: clamp(56px, 7vw, 84px);
  --space-page: clamp(64px, 9vw, 104px);

  --radius-sm: 7px;
  --radius: 12px;
  --shadow-overlay: 0 22px 56px rgb(16 38 50 / 20%);

  --display: "Bricolage Grotesque Variable", "Segoe UI", Arial, sans-serif;
  --body: "Inter Variable", "Segoe UI", Arial, sans-serif;
  --mono: "JetBrains Mono Variable", Consolas, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #121619;
  --surface: #1b2023;
  --surface-soft: #23282b;
  --surface-mist: #20282d;
  --band-soft: #181d20;
  --highlight-tint: #33251f;
  --ink: #f3f0e8;
  --muted: #b7b8b4;
  --line: #373d40;
  --line-strong: #4c5458;
  --accent: #e49a6a;
  --accent-strong: #f0b189;
  --accent-bright: #f0a97c;
  --signal: #7fa6be;
  --signal-strong: #a9c8de;
  --signal-bright: #8fb8ce;
  --inverse: #0d1215;
  --inverse-ink: #f3f0e8;
  --inverse-muted: #b4bdb8;
  --success: #7fa6be;
  --shadow-overlay: 0 24px 64px rgb(0 0 0 / 44%);
}


* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  overflow-wrap: break-word;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.65 var(--body);
  text-rendering: optimizeLegibility;
}

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

img {
  height: auto;
}

figure,
p,
h1,
h2,
h3,
h4 {
  margin: 0;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

button,
summary {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.container {
  width: min(calc(100% - (2 * var(--gutter))), var(--frame));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  inset: -90px auto auto 16px;
  z-index: 100;
  padding: 11px 15px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--paper);
  font-weight: 700;
}

.skip-link:focus {
  top: 16px;
}

/* Header and navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  margin-right: auto;
  color: var(--ink);
  font: 750 1.65rem/1 var(--display);
  letter-spacing: -0.04em;
  text-decoration: none;
}

.brand span {
  color: var(--accent);
}

.desktop-nav,
.header-tools {
  display: flex;
  align-items: center;
}

.desktop-nav {
  gap: 22px;
}

.header-tools {
  gap: 8px;
}

.nav-link,
.nav-group > summary {
  color: var(--muted);
  font: 700 0.74rem/1.25 var(--mono);
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.nav-group {
  position: relative;
}

.nav-group > summary {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  cursor: pointer;
}

.nav-group > summary::-webkit-details-marker,
.mobile-menu > summary::-webkit-details-marker,
.mobile-nav-group > summary::-webkit-details-marker {
  display: none;
}

.nav-group > summary::after {
  content: "+";
  color: var(--accent);
  font-size: 0.9rem;
}

.nav-group[open] > summary::after {
  content: "−";
}

.nav-link:hover,
.nav-link[aria-current="page"],
.nav-group[open] > summary,
.nav-group.is-current-group > summary {
  color: var(--accent-strong);
}

.submenu {
  position: absolute;
  top: calc(100% + 10px);
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-overlay);
}

.submenu-about {
  left: 50%;
  width: 350px;
  transform: translateX(-50%);
}

.submenu a {
  display: block;
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.submenu a:hover,
.submenu a[aria-current="page"] {
  background: var(--surface-soft);
}

.submenu strong,
.submenu span {
  display: block;
}

.submenu strong {
  font: 675 0.94rem/1.3 var(--display);
}

.submenu span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.77rem;
  line-height: 1.4;
}

.project-menu {
  right: -96px;
  width: min(780px, calc(100vw - (2 * var(--gutter))));
}

.project-menu-overview {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.project-menu-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  padding-top: 12px;
}

.project-menu-group > span,
.mobile-project-group > span {
  display: block;
  padding: 8px 12px 4px;
  color: var(--muted);
  font: 700 0.66rem/1.35 var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.icon-link,
.icon-button {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  text-decoration: none;
}

.icon-link:hover,
.icon-button:hover {
  border-color: var(--line-strong);
  color: var(--accent-strong);
}

.icon-link svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
}

.mobile-menu {
  display: none;
}

/* Page orientation */

.breadcrumb {
  padding-block: 15px;
  color: var(--muted);
  font: 600 0.7rem/1.45 var(--mono);
  letter-spacing: 0.04em;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  margin: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 7px;
  color: var(--line-strong);
}

.breadcrumb a {
  color: var(--accent-strong);
}

.breadcrumb + .page-intro {
  padding-top: clamp(44px, 5vw, 64px);
}

.page-intro {
  padding-block: var(--space-page) var(--space-chapter);
}

.intro-head {
  width: 100%;
}

.page-intro h1 {
  max-width: 13.5em;
  font: 735 clamp(2.8rem, 5.5vw, 4.45rem)/1.04 var(--display);
  letter-spacing: -0.035em;
}

.page-intro h1 span {
  color: var(--accent);
  font-style: normal;
}

.heading-focus {
  color: var(--accent-strong);
  font-style: normal;
  font-weight: 780;
}

.eyebrow,
.kicker,
.callout-label,
.card-label,
.read-next-label,
.chapter-number {
  display: block;
  color: var(--muted);
  font: 700 0.7rem/1.45 var(--mono);
  letter-spacing: 0.095em;
  text-transform: uppercase;
}

/* Callout labels share the warm action color; gold is not a third UI hue. */
.callout-label {
  color: var(--accent);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-group);
  align-items: start;
  margin-top: var(--space-group);
}

.intro-grid:has(.intro-portrait) {
  grid-template-columns: minmax(0, 1fr) minmax(220px, var(--portrait));
}

.intro-grid > * {
  min-width: 0;
}

.intro-copy > * + * {
  margin-top: var(--space-text);
}

.page-intro.container > .feature-callout {
  width: 100%;
  margin-top: var(--space-item);
}

.intro-subtitle {
  max-width: 60ch;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.18rem);
}

.intro-lede {
  max-width: var(--measure);
  font-size: clamp(1.08rem, 1.8vw, 1.22rem);
}

.intro-portrait {
  width: 100%;
  max-width: var(--portrait);
  justify-self: end;
}

.intro-portrait img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.intro-portrait figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.78rem;
}

.page-toc {
  display: flex;
  align-items: flex-start;
  gap: var(--space-item);
  padding-block: 17px;
  border-block: 1px solid var(--line);
}

.page-toc > span {
  flex: 0 0 auto;
  padding-top: 3px;
  color: var(--muted);
  font: 700 0.68rem/1.4 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-toc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 17px;
}

.page-toc a {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 650;
}

.page-toc a:hover {
  color: var(--ink);
}

/* Section frame and semantic templates */

.site-section {
  width: 100%;
  padding-block: var(--space-chapter);
  border-top: 1px solid var(--line);
  scroll-margin-top: 92px;
}

.section-shell {
  width: min(calc(100% - (2 * var(--gutter))), var(--frame));
  margin-inline: auto;
}

.section-shell > * {
  margin-block: 0;
}

.section-shell > * + * {
  margin-top: var(--space-group);
}

.section-shell > .kicker + h2,
.section-shell > .kicker + * {
  margin-top: 10px;
}

.section-shell > h2 + :is(.prose, .section-intro, .directory-intro) {
  margin-top: var(--space-text);
}

.section-shell > :is(p, ul, ol, .section-intro, .prose, .directory-intro) {
  width: 100%;
  margin-inline: 0;
}

.section-shell > :is(.highlight, .feature-callout) {
  width: 100%;
  margin-inline: 0;
}

.section-shell > :is(.kicker, h2) {
  width: 100%;
  margin-inline: 0 auto;
}

/* The centered section shell is the only horizontal rail. Stacked headings,
   prose groups, callouts, and components begin on the same frame edge. Running
   text keeps its readable measure; split and pair leads subdivide the frame. */

.site-section[data-template="split-ending"] .ending-content {
  width: 100%;
  margin-inline: 0;
}

.site-section[data-template="split-ending"] .read-next,
.site-section[data-template="cards-2"] .card-grid,
.site-section[data-template="cards-3"] .card-grid,
.site-section[data-template="cards-4"] .card-grid,
.site-section[data-template="horizontal-rows"] .capability-list,
.site-section[data-template="horizontal-rows"] .detail-list,
.site-section[data-template="timeline"] .steps,
.site-section[data-template="timeline"] .timeline,
.site-section[data-template="directory-group"] .project-directory,
.site-section[data-template="evidence"] :is(.media-block, .media-grid) {
  width: 100%;
  max-width: var(--frame);
  margin-inline: 0 auto;
}

.tone-soft {
  background: var(--band-soft);
}

.tone-inverse {
  border-color: var(--inverse);
  background: var(--inverse);
  color: var(--inverse-ink);
}

.tone-inverse .kicker,
.tone-inverse .callout-label,
.tone-inverse .read-next-label,
.tone-inverse .card-label,
.tone-inverse .chapter-number {
  color: var(--accent-bright);
}

.tone-inverse .prose,
.tone-inverse .caption,
.tone-inverse .figure-note,
.tone-inverse .section-intro {
  color: var(--inverse-muted);
}

.tone-inverse .metric-value {
  color: var(--accent-bright);
}

.tone-inverse .text-link {
  color: var(--signal-bright);
  text-decoration-color: color-mix(in srgb, var(--signal-bright) 60%, transparent);
}

.tone-inverse .prose strong,
.tone-inverse .section-intro strong {
  color: var(--inverse-ink);
}

.tone-inverse .prose em:not(.caveat),
.tone-inverse .section-intro em:not(.caveat) {
  color: var(--inverse-muted);
}

.tone-inverse .caveat {
  color: var(--inverse-muted);
}

.tone-inverse .heading-focus {
  color: var(--accent-bright);
}

.tone-inverse :where(a, button, summary, [tabindex]):focus-visible {
  outline-color: var(--signal-bright);
}

.tone-inverse .button-secondary {
  border-color: color-mix(in srgb, var(--inverse-ink) 55%, transparent);
  color: var(--inverse-ink);
}

.tone-inverse .card {
  border-color: color-mix(in srgb, var(--inverse-ink) 17%, transparent);
  background: color-mix(in srgb, var(--inverse-ink) 6%, transparent);
  color: var(--inverse-ink);
}

.tone-inverse .action-label {
  color: var(--accent-bright);
}

/* Typography and reading rhythm */

h2 {
  max-width: var(--frame);
  font: 720 clamp(2rem, 3.5vw, 2.75rem)/1.1 var(--display);
  letter-spacing: -0.028em;
}

h3 {
  font: 675 clamp(1.28rem, 2vw, 1.52rem)/1.22 var(--display);
  letter-spacing: -0.015em;
}

h4 {
  font: 675 clamp(1.12rem, 1.7vw, 1.3rem)/1.25 var(--display);
  letter-spacing: -0.012em;
}

p,
li {
  max-width: var(--measure);
}

p + p {
  margin-top: 0.9em;
}

li + li {
  margin-top: 0.42em;
}

.prose > * + * {
  margin-top: var(--space-text);
}

/* Emphasis grammar (V4.7): bold is the sentence's takeaway; italics are
   voice, nuance, a title, or a caveat; underline means clickable. Verification
   metadata ([data-claim]) is never itself a color/weight selector — it
   inherits from whatever component or prose context contains it. */

.prose strong,
.section-intro strong {
  color: var(--ink);
  font-weight: 740;
}

.prose em:not(.caveat),
.section-intro em:not(.caveat) {
  color: var(--ink);
  font-weight: 550;
}

.caveat {
  color: var(--muted);
  font-style: italic;
  font-weight: 550;
}

[data-claim] {
  color: inherit;
  font-weight: inherit;
  font-variant-numeric: tabular-nums;
}

.metric-value {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.section-intro {
  max-width: none;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.5vw, 1.1rem);
}

.text-link {
  color: var(--accent);
  font-weight: 725;
  text-decoration-line: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent-strong);
  text-decoration-color: currentColor;
}

.action-label {
  color: var(--accent);
  font-style: normal;
  font-weight: 700;
}

/* A component-led section must expose its scan cue inside the component.
   Small labels and indices carry the warm cue; titles and body copy remain
   neutral so groups do not become walls of orange text. */
.site-section[data-attention="component"] :is(.card-label, .chapter-number) {
  color: var(--accent);
}

a.card:hover .action-label,
a.card:focus-visible .action-label {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.muted,
.caption,
.figure-note {
  color: var(--muted);
}

/* Calls to action */

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  align-items: center;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 17px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--paper);
}

.button-secondary {
  background: transparent;
}

/* Intro and feature panels */

.highlight,
.feature-callout {
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.highlight {
  border-left: 4px solid var(--accent);
  background: var(--surface);
}

.feature-callout {
  border-left: 4px solid var(--accent);
  background: var(--surface);
}

.highlight > *,
.feature-callout > * {
  display: block;
}

.highlight > * + *,
.feature-callout > * + * {
  margin-top: 9px;
}

.highlight > span,
.callout-copy {
  color: var(--muted);
}

.callout-title {
  font: 675 clamp(1.18rem, 2vw, 1.48rem)/1.28 var(--display);
}

/* Metrics */

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--space-group);
  border-block: 1px solid var(--line);
  background: var(--line);
}

.metric {
  min-height: 104px;
  padding: 22px;
  background: var(--paper);
}

.metric > strong,
.metric > span {
  display: block;
}

.metric > strong {
  color: var(--accent);
  font: 675 clamp(1.35rem, 2.5vw, 2rem)/1.15 var(--display);
}

.metric > span {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.metric > strong > span {
  display: inline;
}

/* Inner groupings do not choose page layout. The semantic template does. */

.section-grid {
  display: block;
}

.section-grid > * {
  min-width: 0;
  width: 100%;
  margin-inline: 0;
}

.section-grid > * + * {
  margin-top: var(--space-item);
}

.section-grid > div:not([class]) > * + * {
  margin-top: var(--space-text);
}

.section-grid > div:not([class]) > h2 + * {
  margin-top: var(--space-item);
}

.site-section:not([data-template="reading"]) .section-grid > div:first-child > p {
  max-width: none;
}

.site-section[data-lead="split"] .section-grid,
.site-section[data-lead="pair"] .section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-group);
  align-items: center;
}

.site-section[data-lead="pair"] .section-grid {
  align-items: start;
}

.lead-heading {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-self: center;
  gap: 10px;
}

.lead-heading > * {
  margin: 0;
}

.site-section[data-lead="split"] .section-grid > *,
.site-section[data-lead="pair"] .section-grid > * {
  width: auto;
  margin: 0;
}

.site-section[data-lead="split"] .section-grid > * + *,
.site-section[data-lead="pair"] .section-grid > * + * {
  margin-top: 0;
}

.summary-list {
  border-top: 1px solid var(--line-strong);
}

.summary-item {
  padding-block: 16px;
  border-bottom: 1px solid var(--line);
}

.summary-item strong,
.summary-item span {
  display: block;
}

.summary-item span {
  margin-top: 6px;
  color: var(--muted);
}

.site-section[data-template^="cards-"] .section-grid > .card-grid {
  width: 100%;
  max-width: var(--frame);
}

/* Exact-count comparisons */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

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

.card-grid.three-col {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid.four-col {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.site-section[data-template="cards-2"] .card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.site-section[data-template="cards-3"] .card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.site-section[data-template="cards-4"] .card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  min-width: 0;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

a.card {
  display: block;
  text-decoration: none;
}

a.card:hover {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--surface) 89%, var(--surface-soft));
}

.tone-inverse a.card:hover,
.tone-inverse a.card:focus-visible {
  border-color: color-mix(in srgb, var(--inverse-ink) 42%, transparent);
  background: color-mix(in srgb, var(--inverse-ink) 12%, transparent);
  color: var(--inverse-ink);
}

.card > * {
  max-width: none;
}

.card > :is(strong, span) {
  display: block;
}

.card > * + * {
  margin-top: 12px;
}

.card-title {
  display: block;
  font: 675 1.35rem/1.25 var(--display);
}

.card-result {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* Experience capabilities */

.capability-list {
  border-top: 1px solid var(--line-strong);
}

.capability-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px var(--space-item);
  align-items: start;
  padding-block: 27px;
  border-bottom: 1px solid var(--line);
}

.capability-index {
  color: var(--accent);
  font: 650 0.82rem/1.4 var(--mono);
}

.capability-name h3 {
  margin-top: 7px;
}

.capability-name,
.capability-row p {
  grid-column: 2;
}

.capability-row p {
  max-width: var(--measure);
  color: var(--muted);
}

.detail-list {
  border-top: 1px solid var(--line-strong);
}

.detail-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 10px var(--space-group);
  align-items: start;
  padding-block: 27px;
  border-bottom: 1px solid var(--line);
}

.detail-row > * {
  min-width: 0;
}

.detail-row .card-label {
  grid-column: 1;
  grid-row: 1 / span 3;
  margin-top: 4px;
}

.detail-row > strong,
.detail-row > span:not(.card-label),
.detail-row-copy,
.detail-row > .text-link {
  grid-column: 2;
}

.detail-row > span:not(.card-label) {
  max-width: var(--measure);
  color: var(--muted);
}

.detail-row-copy > * + * {
  margin-top: 10px;
}

.detail-row-copy > span {
  display: block;
  max-width: 58ch;
  color: var(--muted);
}

.takeaway-list .detail-row-copy > span {
  max-width: none;
  color: var(--ink);
  font-size: 1.02rem;
}

.takeaway-list .detail-row {
  padding-inline: clamp(16px, 2.5vw, 24px);
}

.takeaway-list .detail-row:nth-child(odd) {
  background: color-mix(in srgb, var(--surface) 42%, transparent);
}


/* Timeline and process */

.steps {
  border-top: 1px solid var(--line-strong);
}

.step {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: var(--space-item);
  padding-block: 25px;
  border-bottom: 1px solid var(--line);
}

.step > strong:first-child,
.step-number {
  color: var(--accent);
  font: 675 1rem/1.4 var(--display);
}

.step > span {
  max-width: 74ch;
}

/* Projects directory */

.directory-intro > * + * {
  margin-top: var(--space-text);
}

.project-directory {
  display: grid;
  gap: var(--space-group);
}

.project-chapter {
  padding-top: var(--space-item);
  border-top: 1px solid var(--line-strong);
}

.project-chapter-heading {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: var(--space-item);
  align-items: start;
  margin-bottom: var(--space-item);
}

.project-chapter-heading p {
  margin-top: 7px;
  color: var(--muted);
}

.project-tile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.directory-tile {
  min-width: 0;
  min-height: 310px;
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.project-tile-grid[data-count="1"] .directory-tile {
  min-height: 0;
}

.directory-tile-meta span {
  display: block;
  color: var(--muted);
  font: 650 0.68rem/1.45 var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.directory-tile-copy {
  margin-top: var(--space-item);
}

.directory-tile-copy > * + * {
  margin-top: 10px;
}

.directory-tile-copy h4 a {
  text-decoration: none;
}

.directory-tile-copy h4 a:hover {
  color: var(--accent-strong);
}

.project-question {
  color: var(--muted);
  font-weight: 650;
}

.project-result {
  padding: 14px 16px;
  border-left: 3px solid var(--accent);
  background: var(--surface-soft);
}

.directory-tile-action {
  align-self: flex-start;
  margin-top: auto;
  padding-top: var(--space-item);
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 725;
  text-decoration: none;
}

.directory-tile-action:hover,
.directory-tile-action:focus-visible {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.directory-tile-supporting {
  background: color-mix(in srgb, var(--surface-soft) 58%, var(--surface));
}

.reading-links p {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

/* Endings */

.ending-content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-group);
  align-items: start;
}

.ending-heading > * + *,
.ending-response > * + * {
  margin-top: var(--space-text);
}

.ending-heading > .kicker + h2 {
  margin-top: 10px;
}

.ending-content .action-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--space-item);
}

.ending-content .action-row .button {
  width: 100%;
}

.read-next {
  padding-top: var(--space-group);
  border-top: 1px solid color-mix(in srgb, var(--inverse-ink) 20%, transparent);
}

.read-next .card-grid {
  margin-top: 14px;
}

/* Sequence debriefs */

.sequence-debrief {
  width: 100%;
}

.debrief-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.debrief-item {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.debrief-item > * + * {
  margin-top: 9px;
}

.debrief-item p {
  color: var(--muted);
}

.sequence-debrief > .feature-callout {
  width: 100%;
  margin-top: 16px;
}

/* Media and evidence */

.media-block {
  width: 100%;
  max-width: var(--frame);
}

.media-block.inset {
  max-width: 760px;
  margin-inline: auto;
}

.media-block img,
.media-grid img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.media-block figcaption,
.caption,
.figure-note {
  display: block;
  width: 100%;
  max-width: none;
  margin: 12px 0 0;
  font-size: 0.8rem;
  line-height: 1.55;
}

.section-shell > :is(.caption, .figure-note) {
  width: 100%;
  max-width: none;
  margin-inline: 0;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-item);
}

.media-grid.analysis-grid {
  grid-template-columns: 1fr;
  gap: var(--space-group);
}

.analysis-grid .media-block img {
  background: #f5f3ee;
}

/* Evidence visuals
   True sequences use process-flow. Parallel evidence uses evidence-stack or
   check-ladder. Counts from different populations belong in a visual-note,
   never at the end of an arrow. */

.system-visual {
  --visual-gap: 14px;
}

.process-flow {
  display: grid;
  grid-template-columns: repeat(var(--flow-count, 3), minmax(0, 1fr));
  gap: var(--visual-gap);
}

.process-flow.flow-4 {
  --flow-count: 4;
}

.process-flow.flow-5 {
  --flow-count: 5;
}

.process-stage {
  position: relative;
  min-width: 0;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.process-stage:not(:last-child)::after {
  content: "→";
  position: absolute;
  z-index: 1;
  top: 50%;
  right: calc(var(--visual-gap) * -1 - 11px);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper);
  color: var(--muted);
  font-weight: 750;
  transform: translateY(-50%);
}

.process-stage.is-decision {
  border-top-color: var(--accent);
}

.process-stage.is-outcome {
  border-top-color: var(--signal);
}

.process-stage-label,
.visual-label {
  color: var(--muted);
  font: 700 0.67rem/1.35 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.process-stage strong {
  display: block;
  color: var(--ink);
  font: 700 clamp(1.55rem, 3vw, 2.2rem)/1 var(--display);
  font-variant-numeric: tabular-nums;
}

.process-stage.is-decision strong {
  color: var(--accent);
}

.process-stage.is-outcome strong {
  color: var(--signal-strong);
}

.process-stage > span:last-child {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}

.visual-note {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 18px;
  align-items: center;
  margin-top: 14px;
  padding: 17px 19px;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--surface) 78%, var(--surface-soft));
}

.visual-note strong {
  color: var(--accent);
  font: 700 1.2rem/1.2 var(--display);
  font-variant-numeric: tabular-nums;
}

.visual-note span {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.decision-window,
.coverage-panel,
.paper-ledger {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.decision-window > * + *,
.coverage-panel > * + *,
.paper-ledger > * + * {
  margin-top: 18px;
}

.share-meter,
.coverage-meter,
.paper-meter {
  width: 100%;
  height: 18px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: var(--surface-soft);
}

:is(.share-meter, .coverage-meter, .paper-meter)::-webkit-progress-bar,
:is(.share-meter, .coverage-meter, .paper-meter)::-webkit-meter-bar {
  border: 0;
  border-radius: 999px;
  background: var(--surface-soft);
  box-shadow: none;
}

:is(.share-meter, .coverage-meter)::-webkit-progress-value,
:is(.share-meter, .coverage-meter)::-webkit-meter-optimum-value {
  border-radius: 999px;
  background: var(--accent);
}

.paper-meter::-webkit-progress-value {
  border-radius: 999px;
  background: var(--signal);
}

:is(.share-meter, .coverage-meter)::-moz-progress-bar,
.share-meter::-moz-meter-bar {
  border-radius: 999px;
  background: var(--accent);
}

.paper-meter::-moz-progress-bar {
  border-radius: 999px;
  background: var(--signal);
}

.visual-stat-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.visual-stat {
  padding: 16px;
  border-top: 2px solid var(--line-strong);
  background: var(--paper);
}

.visual-stat.is-accent {
  border-top-color: var(--accent);
}

.visual-stat.is-signal {
  border-top-color: var(--signal);
}

.visual-stat.is-accent strong {
  color: var(--accent);
}

.visual-stat.is-signal strong {
  color: var(--signal-strong);
}

.visual-stat strong,
.evidence-row strong,
.check-row strong {
  display: block;
  color: var(--ink);
  font: 700 1.4rem/1.15 var(--display);
  font-variant-numeric: tabular-nums;
}

.visual-stat span,
.evidence-row span,
.check-row span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.evidence-stack,
.check-ladder {
  display: grid;
  gap: 10px;
}

.evidence-row,
.check-row {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, 0.5fr);
  gap: 20px;
  align-items: center;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  background: var(--surface);
}

.evidence-row:nth-child(4),
.evidence-row:nth-child(5),
.check-row.is-accent {
  border-left-color: var(--accent);
}

.check-row.is-signal {
  border-left-color: var(--signal);
}

.evidence-row strong,
.check-row strong {
  text-align: right;
}

.ownership-path {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: var(--space-group);
}

.ownership-step {
  min-width: 0;
  padding: 16px;
  border-top: 3px solid var(--line-strong);
  background: var(--surface);
}

.ownership-step.is-boundary {
  border-top-color: var(--accent);
}

.ownership-step.is-handoff {
  border-top-color: var(--signal);
}

.ownership-step strong,
.ownership-step span {
  display: block;
}

.ownership-step strong {
  margin-top: 7px;
  font-family: var(--display);
  line-height: 1.25;
}

.ownership-step span:last-child {
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.chart-card {
  min-width: 0;
}

.receipt-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.receipt-item {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--paper) 78%, var(--surface));
}

.receipt-item strong,
.receipt-item span {
  display: block;
}

.receipt-item strong {
  color: var(--accent);
  font: 675 1.35rem/1.2 var(--display);
  font-variant-numeric: tabular-nums;
}

.receipt-item span {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.receipt-overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: var(--space-item);
}

.receipt-overview + .receipt-grid {
  margin-top: var(--space-item);
}

.receipt-overview-item {
  min-width: 0;
  padding: 18px;
  border-top: 3px solid var(--accent);
  background: var(--surface);
}

.receipt-overview-item:nth-child(2) {
  border-top-color: var(--signal);
}

.receipt-overview-item:nth-child(3) {
  border-top-color: var(--line-strong);
}

.receipt-overview-item > * + * {
  margin-top: 8px;
}

.receipt-overview-item h3 {
  font-size: 1.05rem;
}

.receipt-overview-item p {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.55;
}

.receipt-overview-item p .metric-value {
  color: var(--accent);
}

mark.editorial-highlight {
  padding-inline: 0.2em;
  border-radius: 0.16em;
  border-bottom: 2px solid var(--accent);
  background: var(--highlight-tint);
  color: var(--ink);
  font-weight: 750;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  padding: 14px 17px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font: 700 0.7rem/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

ul,
ol {
  padding-left: 1.25em;
}

/* Disclosures */

.site-section details {
  overflow: clip;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 30px rgb(16 38 50 / 7%);
}

.site-section details > summary {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 20px;
  background: color-mix(in srgb, var(--surface-mist) 60%, var(--surface));
  list-style: none;
  font-weight: 725;
  cursor: pointer;
}

.site-section details > summary::after {
  content: "+";
  color: var(--accent-strong);
  font: 675 1.3rem/1 var(--display);
}

.site-section details[open] > summary {
  border-bottom: 1px solid var(--line);
  background: var(--surface-mist);
}

.site-section details[open] > summary::after {
  content: "−";
}

.site-section details > :not(summary) {
  margin-inline: clamp(18px, 3vw, 30px);
}

.site-section details > :nth-child(2) {
  margin-top: 24px;
}

.site-section details > :last-child {
  margin-bottom: 24px;
}

/* Carousel, tour, diagrams, and lightbox */

.carousel,
.tour {
  position: relative;
}

.carousel-track,
.tour-track {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding-bottom: 12px;
  scroll-snap-type: x mandatory;
}

.carousel-slide,
.tour-slide {
  flex: 0 0 min(92vw, var(--gallery-card));
  scroll-snap-align: start;
}

.tour-slide {
  flex-basis: min(92vw, var(--tour-card));
}

.carousel-slide img,
.tour-slide img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.carousel-slide figcaption,
.tour-slide figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.gallery-status {
  min-width: 72px;
  margin: 10px 0 0 auto;
  color: var(--muted);
  font: 650 0.72rem/1.4 var(--mono);
  letter-spacing: 0.04em;
  text-align: right;
}

.carousel-btn,
.tour-btn {
  position: absolute;
  top: 42%;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface);
}

.carousel-prev,
.tour-prev {
  left: -18px;
}

.carousel-next,
.tour-next {
  right: -18px;
}

img[data-lightbox] {
  cursor: zoom-in;
  transition: opacity 160ms ease;
}

img[data-lightbox]:hover {
  opacity: 0.94;
}

.image-dialog {
  width: min(92vw, 1100px);
  padding: 20px;
  border: 0;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-overlay);
}

.image-dialog::backdrop {
  background: rgb(0 0 0 / 70%);
}

.image-dialog-stage {
  position: relative;
}

.image-dialog img {
  display: block;
  width: 100%;
  max-height: 78vh;
  object-fit: contain;
}

.image-dialog-meta {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: start;
  margin-top: 12px;
}

.image-dialog p,
.image-dialog-status {
  color: var(--muted);
  font-size: 0.82rem;
}

.image-dialog p {
  max-width: none;
}

.image-dialog-status {
  flex: 0 0 auto;
  font-family: var(--mono);
}

.dialog-nav,
.dialog-close {
  width: 44px;
  height: 44px;
  border: 1px solid color-mix(in srgb, var(--inverse-ink) 42%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--inverse) 88%, transparent);
  color: var(--inverse-ink);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.dialog-nav:hover,
.dialog-close:hover {
  border-color: var(--accent-bright);
  background: var(--accent);
  color: var(--paper);
}

.dialog-nav {
  position: absolute;
  top: 50%;
  z-index: 2;
  transform: translateY(-50%);
  font: 675 1.55rem/1 var(--display);
}

.dialog-prev {
  left: 12px;
}

.dialog-next {
  right: 12px;
}

.dialog-close {
  position: absolute;
  top: 8px;
  right: 10px;
  z-index: 3;
  font-size: 1.8rem;
}

/* Footer */

.site-footer {
  padding-block: 48px 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) repeat(2, minmax(140px, 0.75fr));
  gap: 32px;
  align-items: start;
}

.footer-brand strong,
.footer-brand span,
.footer-links strong,
.footer-links a,
.footer-meta span {
  display: block;
}

.footer-brand strong,
.footer-links strong {
  color: var(--ink);
  font-family: var(--display);
}

.footer-brand span {
  max-width: 34ch;
  margin-top: 8px;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links strong {
  margin-bottom: 4px;
}

.footer-meta {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

/* Workbench and layout inspection */

.builder-toolbar {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 60;
  width: min(520px, calc(100vw - 36px));
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid #6e91b8;
  border-radius: var(--radius);
  background: #142331;
  color: #f4f8fc;
  box-shadow: var(--shadow-overlay);
  font-size: 0.78rem;
}

.builder-toolbar div {
  margin-right: auto;
}

.builder-toolbar strong,
.builder-toolbar span {
  display: block;
}

.builder-toolbar span {
  margin-top: 3px;
  color: #bfd0df;
}

.builder-toolbar button,
.builder-toolbar a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 8px 11px;
  border: 1px solid #6e91b8;
  border-radius: var(--radius-sm);
  background: transparent;
  color: inherit;
  text-decoration: none;
}

.layout-debug .page-intro,
.layout-debug .site-section {
  outline: 2px solid #4c77a8;
  outline-offset: -2px;
}

.layout-debug .site-section {
  position: relative;
}

.layout-debug .site-section::before {
  content: attr(data-intent) " · " attr(data-template) " · " attr(data-lead) " · " attr(data-tone) " · " attr(data-attention);
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 2;
  padding: 4px 7px;
  border-radius: 5px;
  background: #142331;
  color: #f4f8fc;
  font: 700 10px/1.2 var(--body);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.layout-debug .section-shell {
  outline: 1px dashed #4c77a8;
  outline-offset: 5px;
}

.layout-debug :is(.card-grid, .media-block, .media-grid, .metrics, .steps, .timeline, .receipt-grid, .highlight, .feature-callout, .capability-list, .detail-list, .project-directory, .read-next, .sequence-debrief) {
  outline: 1px dashed #3f76a8;
  outline-offset: 2px;
}

/* Responsive composition */

@media (max-width: 900px) {
  .desktop-nav,
  .desktop-tools {
    display: none;
  }

  .mobile-menu {
    position: relative;
    display: block;
  }

  .mobile-menu > summary {
    min-width: 72px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 13px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    list-style: none;
    font-weight: 700;
    cursor: pointer;
  }

  .mobile-menu .close-label {
    display: none;
  }

  .mobile-menu[open] .menu-label {
    display: none;
  }

  .mobile-menu[open] .close-label {
    display: inline;
  }

  .mobile-nav {
    position: fixed;
    inset: 74px 0 auto;
    max-height: calc(100dvh - 74px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 18px var(--gutter) 26px;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow-overlay);
  }

  .mobile-nav > a,
  .mobile-nav-group > summary {
    min-height: 50px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--line);
    font: 675 1rem/1.3 var(--display);
    text-decoration: none;
  }

  .mobile-nav > a[aria-current="page"],
  .mobile-nav-links a[aria-current="page"],
  .mobile-nav-group[open] > summary {
    color: var(--accent-strong);
  }

  .mobile-nav-group {
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav-group > summary {
    justify-content: space-between;
    border: 0;
    list-style: none;
  }

  .mobile-nav-group > summary::after {
    content: "+";
    color: var(--accent-strong);
  }

  .mobile-nav-group[open] > summary::after {
    content: "−";
  }

  .mobile-nav-links {
    padding: 2px 0 14px 16px;
  }

  .mobile-nav-links a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 7px 10px;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 650;
    text-decoration: none;
  }

  .mobile-project-overview {
    margin-bottom: 5px;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--line);
  }

  .mobile-project-group + .mobile-project-group {
    margin-top: 5px;
  }

  .mobile-utilities {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    padding-top: 18px;
  }

  .mobile-utilities > * {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--muted);
    font: 650 0.75rem/1.2 var(--mono);
    text-decoration: none;
  }

  body.mobile-nav-open {
    overflow: hidden;
  }

  .intro-grid:has(.intro-portrait),
  .site-section[data-lead="split"] .section-grid,
  .site-section[data-lead="pair"] .section-grid,
  .ending-content {
    grid-template-columns: 1fr;
  }

  .intro-portrait {
    justify-self: start;
  }

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

  .card-grid.three-col,
  .site-section[data-template="cards-3"] .card-grid {
    grid-template-columns: 1fr;
  }

  .card-grid.four-col,
  .site-section[data-template="cards-4"] .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .detail-row {
    grid-template-columns: 120px minmax(0, 1fr);
  }

  .detail-row-copy {
    grid-column: 2;
  }

  .detail-row > .text-link {
    grid-column: 2;
  }

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

  .project-tile-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand,
  .footer-meta {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .header-inner {
    min-height: 68px;
  }

  .mobile-nav {
    inset-block-start: 68px;
    max-height: calc(100dvh - 68px);
  }

  .page-intro {
    padding-block: 56px 46px;
  }

  .page-intro h1 {
    font-size: clamp(2.45rem, 11vw, 3.5rem);
  }

  .page-toc {
    display: block;
  }

  .page-toc-links {
    margin-top: 10px;
  }

  .action-row,
  .action-row .button {
    width: 100%;
  }

  .card-grid,
  .card-grid.two-col,
  .card-grid.three-col,
  .card-grid.four-col,
  .site-section[data-template="cards-2"] .card-grid,
  .site-section[data-template="cards-3"] .card-grid,
  .site-section[data-template="cards-4"] .card-grid,
  .metrics,
  .media-grid,
  .receipt-grid,
  .receipt-overview,
  .project-tile-grid {
    grid-template-columns: 1fr;
  }

  .process-flow,
  .visual-stat-pair,
  .ownership-path {
    grid-template-columns: 1fr;
  }

  .process-stage {
    min-height: 0;
  }

  .process-stage:not(:last-child)::after {
    content: "↓";
    top: auto;
    right: 50%;
    bottom: calc(var(--visual-gap) * -1 - 11px);
    transform: translateX(50%);
  }

  .visual-note,
  .evidence-row,
  .check-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .evidence-row strong,
  .check-row strong {
    text-align: left;
  }

  .debrief-grid,
  .ending-content .action-row {
    grid-template-columns: 1fr;
  }

  .capability-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px 16px;
    padding-block: 23px;
  }

  .capability-row p {
    grid-column: 2;
  }

  .detail-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .detail-row .card-label,
  .detail-row > strong,
  .detail-row > span:not(.card-label),
  .detail-row-copy {
    grid-column: auto;
    grid-row: auto;
  }

  .detail-row > .text-link {
    grid-column: auto;
  }

  .step {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .project-chapter-heading {
    grid-template-columns: 1fr;
  }

  .project-chapter-heading {
    gap: 8px;
  }

  .directory-tile {
    min-height: 0;
    padding: 22px;
  }

  .footer-grid {
    gap: 28px 18px;
  }

  .carousel-prev,
  .tour-prev {
    left: 4px;
  }

  .carousel-next,
  .tour-next {
    right: 4px;
  }

  .builder-toolbar {
    right: 10px;
    bottom: 10px;
    width: calc(100vw - 20px);
    flex-wrap: wrap;
  }

  .builder-toolbar div {
    flex: 1 0 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  img[data-lightbox] {
    transition: none;
  }
}

@media (forced-colors: active) {
  .card,
  .highlight,
  .feature-callout,
  .submenu,
  .receipt-item,
  .receipt-overview-item,
  .directory-tile {
    border: 1px solid CanvasText;
  }

  .button-primary {
    border: 2px solid ButtonText;
  }
}