:root {
  color-scheme: dark;
  --brand-bg: oklch(0.16 0.035 255);
  --brand-bg-2: oklch(0.205 0.045 255);
  --brand-panel: oklch(0.235 0.045 255);
  --brand-ink: oklch(0.965 0.012 245);
  --brand-copy: oklch(0.84 0.03 245);
  --brand-muted: oklch(0.69 0.035 245);
  --brand-line: oklch(0.48 0.045 245 / 0.38);
  --signal: oklch(0.78 0.135 205);
  --signal-deep: oklch(0.64 0.145 215);
  --violet: oklch(0.69 0.15 295);
  --amber: oklch(0.82 0.15 82);
  --paper: oklch(0.965 0.009 235);
  --paper-2: oklch(0.925 0.015 235);
  --paper-ink: oklch(0.12 0.012 250);
  --paper-copy: oklch(0.23 0.018 250);
  --paper-muted: oklch(0.41 0.022 250);
  --paper-line: oklch(0.77 0.025 235);
  --danger: oklch(0.61 0.18 25);
  --green: oklch(0.62 0.13 155);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", monospace;
  --page: min(1180px, calc(100vw - 40px));
  --measure: 72ch;
  --nav-height: 74px;
  --preview-height: 28px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html[data-theme="light"] {
  color-scheme: light;
  --brand-bg: oklch(0.95 0.012 235);
  --brand-bg-2: oklch(0.91 0.02 235);
  --brand-panel: oklch(0.98 0.006 235);
  --brand-ink: oklch(0.25 0.045 250);
  --brand-copy: oklch(0.39 0.035 250);
  --brand-muted: oklch(0.53 0.028 250);
  --brand-line: oklch(0.67 0.035 240 / 0.5);
  --signal: oklch(0.56 0.135 215);
  --signal-deep: oklch(0.49 0.13 215);
  --violet: oklch(0.54 0.16 295);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--preview-height) + var(--nav-height) + 20px);
}

body {
  margin: 0;
  background: var(--brand-bg);
  color: var(--brand-copy);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  background:
    linear-gradient(var(--brand-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--brand-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.12;
  mask-image: linear-gradient(to bottom, oklch(0 0 0 / 0.9), transparent 78vh);
}

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

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 4px;
  left: 12px;
  padding: 8px 12px;
  background: var(--amber);
  color: var(--paper-ink);
  font-weight: 800;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.preview-ribbon {
  position: fixed;
  z-index: 110;
  inset: 0 0 auto;
  height: var(--preview-height);
  display: grid;
  place-items: center;
  background: var(--amber);
  color: var(--paper-ink);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.resource-nav {
  position: fixed;
  z-index: 100;
  top: var(--preview-height);
  left: 0;
  right: 0;
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px max(20px, calc((100vw - 1180px) / 2));
  background: var(--brand-bg);
  border-bottom: 1px solid var(--brand-line);
}

.resource-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.055em;
  text-decoration: none;
  white-space: nowrap;
}

.resource-nav__mark {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--signal), var(--violet));
  box-shadow: 0 0 18px oklch(0.78 0.135 205 / 0.55);
}

.resource-nav__links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2vw, 28px);
}

.resource-nav__links a,
.resource-nav__lang,
.resource-nav__button {
  color: var(--brand-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.075em;
  text-decoration: none;
  text-transform: uppercase;
}

.resource-nav__links a {
  padding-block: 10px;
  text-underline-offset: 6px;
}

.resource-nav__links a:hover {
  color: var(--signal);
  text-decoration: underline;
}

.resource-nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.resource-nav__lang,
.resource-nav__button {
  display: inline-grid;
  min-width: 44px;
  min-height: 40px;
  place-items: center;
  padding: 8px 10px;
  background: transparent;
  border: 1px solid var(--brand-line);
  border-radius: 7px;
  cursor: pointer;
}

.resource-nav__lang:hover,
.resource-nav__button:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.resource-nav__menu {
  display: none;
}

main {
  min-height: 70vh;
  padding-top: calc(var(--preview-height) + var(--nav-height));
}

.resource-hero,
.hub-hero {
  width: var(--page);
  margin-inline: auto;
  padding: clamp(72px, 10vw, 140px) 0 clamp(56px, 7vw, 92px);
}

.resource-hero {
  max-width: 980px;
  margin-left: max(20px, calc((100vw - 1180px) / 2));
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(32px, 5vw, 64px);
  color: var(--brand-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.breadcrumbs a:hover {
  color: var(--signal);
}

.resource-kicker {
  margin: 0 0 16px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.resource-hero h1,
.hub-hero h1,
.download-hero h1 {
  max-width: 900px;
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(2.65rem, 7vw, 5.9rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.98;
  text-wrap: balance;
}

.resource-hero__lead {
  max-width: 68ch;
  margin: 28px 0 0;
  color: var(--brand-copy);
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  line-height: 1.58;
}

.resource-byline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 820px;
  margin: 44px 0 0;
  border-top: 1px solid var(--brand-line);
  border-bottom: 1px solid var(--brand-line);
}

.resource-byline div {
  padding: 16px 18px;
}

.resource-byline div + div {
  border-left: 1px solid var(--brand-line);
}

.resource-byline dt {
  color: var(--brand-muted);
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-byline dd {
  margin: 4px 0 0;
  color: var(--brand-ink);
  font-size: 0.88rem;
  font-weight: 700;
}

.article-layout {
  width: var(--page);
  margin: 0 auto clamp(84px, 10vw, 150px);
  display: grid;
  grid-template-columns: minmax(0, 820px) minmax(230px, 1fr);
  align-items: start;
  gap: clamp(24px, 4vw, 54px);
}

.field-article {
  min-width: 0;
  padding: clamp(30px, 5.5vw, 72px);
  background: var(--paper);
  color: var(--paper-copy);
  font-size: 1.05rem;
  border: 1px solid var(--paper-line);
  border-radius: 3px;
  box-shadow: 0 42px 90px oklch(0.08 0.03 255 / 0.38);
}

.field-article > :first-child {
  margin-top: 0;
}

.field-article h2,
.field-article h3,
.article-next h2,
.preview-form-panel h2,
.guide-download-panel h2 {
  color: var(--paper-ink);
  font-family: var(--font-display);
  text-wrap: balance;
}

.field-article h2 {
  margin: 2.2em 0 0.7em;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.field-article h3 {
  margin: 2em 0 0.65em;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

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

.field-article p {
  margin: 1em 0;
}

.field-article a {
  color: oklch(0.48 0.145 215);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.field-article a:hover {
  color: oklch(0.4 0.14 215);
}

.field-article ul,
.field-article ol {
  padding-left: 1.4em;
}

.field-article li + li {
  margin-top: 0.42em;
}

.field-article blockquote {
  margin: 2rem 0;
  padding: 22px 24px;
  color: var(--paper-ink);
  background: oklch(0.9 0.045 205);
  border: 1px solid oklch(0.72 0.08 205);
  font-size: 1.08rem;
  font-weight: 700;
}

.field-article blockquote p {
  margin: 0;
}

.field-article code {
  padding: 0.15em 0.38em;
  background: oklch(0.89 0.018 250);
  color: oklch(0.37 0.11 295);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.field-article pre {
  overflow-x: auto;
  padding: 20px;
  background: var(--paper-ink);
  color: var(--paper);
  border-radius: 2px;
}

.technical-plate {
  margin: 2.2rem 0 0;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--paper-line);
  background: oklch(0.985 0.004 235);
}

.technical-plate img {
  width: 100%;
  height: auto;
}

.technical-plate + p:has(> em) {
  margin-top: 0.7rem;
  color: var(--paper-muted);
  font-size: 0.83rem;
  line-height: 1.5;
}

.table-scroll {
  max-width: 100%;
  margin: 1.7rem 0;
  overflow-x: auto;
  border: 1px solid var(--paper-line);
}

.field-article table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.field-article th,
.field-article td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--paper-line);
}

.field-article th {
  background: var(--paper-2);
  color: var(--paper-ink);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.field-article tr:last-child td {
  border-bottom: 0;
}

.article-aside {
  position: sticky;
  top: calc(var(--preview-height) + var(--nav-height) + 24px);
  display: grid;
  gap: 18px;
}

.article-aside__toc,
.author-note {
  padding: 22px;
  background: var(--brand-panel);
  border: 1px solid var(--brand-line);
}

.article-aside__toc .toc > span {
  display: block;
  margin-bottom: 14px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-aside__toc ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-aside__toc ul ul {
  margin-top: 9px;
  padding-left: 14px;
  border-left: 1px solid var(--brand-line);
}

.article-aside__toc a {
  color: var(--brand-copy);
  font-size: 0.82rem;
  line-height: 1.35;
  text-decoration: none;
}

.article-aside__toc a:hover {
  color: var(--signal);
}

.author-note p {
  margin: 0 0 12px;
}

.author-note a {
  color: var(--signal);
  font-weight: 700;
}

.article-next {
  margin-top: clamp(48px, 8vw, 90px);
  padding-top: 30px;
  border-top: 1px solid var(--paper-line);
}

.article-next h2 {
  max-width: 18ch;
  margin: 0 0 24px;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  line-height: 1.05;
}

.article-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.field-article__primary-action {
  margin: 24px 0 34px;
}

.field-article .fact-line {
  color: var(--paper-muted);
  border-color: var(--paper-line);
}

.field-article .fact-line li::before {
  color: oklch(0.45 0.12 215);
}

.resource-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  text-align: center;
  text-decoration: none !important;
  text-transform: uppercase;
  transition:
    transform 220ms var(--ease),
    background 220ms var(--ease),
    color 220ms var(--ease),
    border-color 220ms var(--ease);
  cursor: pointer;
}

.resource-button:hover {
  transform: translateY(-2px);
}

.resource-button--primary {
  background: var(--signal);
  color: var(--paper-ink) !important;
}

.resource-button--primary:hover {
  background: var(--signal-deep);
  color: var(--brand-ink) !important;
}

.resource-button--ghost {
  color: var(--brand-ink) !important;
  background: transparent;
  border-color: var(--brand-line);
}

.resource-button--ghost:hover {
  color: var(--signal) !important;
  border-color: var(--signal);
}

.field-article .resource-button--ghost {
  color: var(--paper-ink) !important;
  border-color: var(--paper-line);
}

.field-article .resource-button--ghost:hover {
  color: oklch(0.4 0.14 215) !important;
  border-color: var(--signal-deep);
}

.resource-footer {
  width: var(--page);
  margin: 0 auto;
  padding: 32px 0 48px;
  display: flex;
  justify-content: space-between;
  gap: 40px;
  color: var(--brand-muted);
  border-top: 1px solid var(--brand-line);
  font-size: 0.78rem;
}

.resource-footer p {
  margin: 4px 0 0;
}

.resource-footer strong,
.resource-footer__stamp {
  color: var(--brand-ink);
  font-family: var(--font-mono);
  letter-spacing: 0.055em;
}

.hub-hero {
  min-height: 66vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.hub-hero .breadcrumbs {
  margin-bottom: auto;
}

.guide-ledger {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 170px);
  border-top: 1px solid var(--brand-line);
}

.guide-entry {
  display: grid;
  grid-template-columns: minmax(180px, 300px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(28px, 6vw, 84px);
  padding: clamp(54px, 8vw, 100px) 0;
  border-bottom: 1px solid var(--brand-line);
}

.guide-entry:nth-child(even) {
  grid-template-columns: minmax(0, 1fr) minmax(170px, 250px);
}

.guide-entry:nth-child(even) .book-cover {
  order: 2;
}

.guide-entry h2,
.tool-feature h2,
.hub-callout h2,
.french-resource-ledger h2 {
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.guide-entry p:not(.resource-kicker),
.tool-feature p:not(.resource-kicker),
.french-resource-ledger p:not(.resource-kicker) {
  max-width: 60ch;
  font-size: 1.05rem;
}

.book-cover {
  margin: 0;
}

.book-cover img {
  width: 100%;
  height: auto;
  border: 1px solid var(--brand-line);
  box-shadow: 18px 24px 0 var(--brand-bg-2);
  transform: rotate(-1.5deg);
}

.guide-entry:nth-child(even) .book-cover img {
  transform: rotate(1.5deg);
}

.fact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 24px 0;
  padding: 14px 0;
  color: var(--brand-muted);
  border-top: 1px solid var(--brand-line);
  border-bottom: 1px solid var(--brand-line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  list-style: none;
}

.fact-line li::before {
  content: "✓";
  margin-right: 6px;
  color: var(--signal);
}

.guide-entry__diagram {
  margin: 0;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--brand-line);
  box-shadow: 0 20px 56px oklch(0.1 0.02 250 / 0.22);
  transform: none;
}

.guide-entry__diagram img {
  width: 100%;
  height: auto;
}

.guide-entry--playbook {
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: clamp(30px, 4vw, 52px);
}

.guide-entry--playbook > div {
  max-width: 820px;
}

.playbook-hero {
  width: min(1480px, calc(100vw - 40px));
  min-height: auto;
  margin-inline: auto;
  padding: clamp(58px, 7vw, 104px) 0 clamp(52px, 7vw, 92px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: clamp(38px, 5vw, 68px);
}

.playbook-hero__copy {
  width: min(100%, 980px);
}

.playbook-hero .breadcrumbs {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.playbook-hero h1 {
  max-width: 780px;
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.96;
  text-wrap: balance;
}

.playbook-hero__promise {
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--brand-ink);
  font-size: 1.02rem;
}

.playbook-hero__actions {
  display: grid;
  justify-items: start;
  gap: 15px;
  margin-top: 30px;
}

.playbook-download {
  min-height: 56px;
  padding-inline: 24px;
  font-size: 0.82rem;
}

.playbook-context-link {
  color: var(--signal);
  font-weight: 700;
  text-underline-offset: 5px;
}

.playbook-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 24px 0 0;
  padding: 14px 0 0;
  color: var(--brand-muted);
  border-top: 1px solid var(--brand-line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  list-style: none;
}

.playbook-meta li + li::before {
  content: "·";
  margin-right: 18px;
  color: var(--signal);
}

.playbook-hero__plate {
  width: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--brand-line);
  box-shadow: 0 24px 64px oklch(0.1 0.02 250 / 0.24);
  transform: none;
}

.playbook-hero__plate img {
  width: 100%;
  height: auto;
}

.playbook-hero__plate figcaption {
  padding: 14px 16px;
  color: var(--paper-ink);
  border-top: 1px solid var(--paper-line);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.035em;
}

.playbook-proofline {
  width: var(--page);
  margin: 0 auto clamp(52px, 7vw, 84px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--brand-line);
  border-bottom: 1px solid var(--brand-line);
}

.playbook-proofline div {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 12px;
  padding: 20px clamp(12px, 3vw, 32px);
}

.playbook-proofline div + div {
  border-left: 1px solid var(--brand-line);
}

.playbook-proofline strong {
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
}

.playbook-proofline span {
  color: var(--brand-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.playbook-article {
  padding-top: clamp(38px, 5vw, 64px);
}

.playbook-related,
.playbook-final {
  margin-top: clamp(54px, 8vw, 88px);
  padding-top: 30px;
  border-top: 1px solid var(--paper-line);
}

.playbook-related h2,
.playbook-final h2 {
  margin-top: 0;
}

.playbook-related__links {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--paper-line);
}

.playbook-related__links a {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  color: var(--paper-ink);
  border-bottom: 1px solid var(--paper-line);
  text-decoration: none;
}

.playbook-related__links a::after {
  content: "→";
  color: var(--signal-deep);
}

.playbook-final {
  padding: clamp(26px, 5vw, 44px);
  color: var(--brand-copy);
  background: var(--brand-bg);
  border: 0;
}

.playbook-final h2 {
  color: var(--brand-ink);
}

.playbook-final > p:last-child {
  margin-bottom: 0;
  color: var(--brand-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.article-ledger {
  width: var(--page);
  margin: 0 auto clamp(70px, 10vw, 130px);
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--brand-line);
}

.article-ledger > li {
  display: grid;
  grid-template-columns: 52px 150px minmax(0, 1fr) auto;
  align-items: start;
  gap: 20px;
  padding: 32px 0;
  border-bottom: 1px solid var(--brand-line);
}

.article-ledger__index,
.article-ledger__type,
.article-ledger__go {
  padding-top: 6px;
  color: var(--brand-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.article-ledger__index {
  color: var(--signal);
}

.article-ledger h2 {
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.article-ledger h2 a {
  text-decoration: none;
}

.article-ledger h2 a:hover {
  color: var(--signal);
}

.article-ledger p {
  max-width: 68ch;
  margin: 9px 0 0;
  color: var(--brand-muted);
  font-size: 0.91rem;
}

.article-ledger__go {
  color: var(--signal);
  text-decoration: none;
}

.hub-callout {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 160px);
  padding: clamp(42px, 7vw, 84px);
  color: var(--paper-copy);
  background: var(--paper);
}

.hub-callout h2 {
  max-width: 14ch;
  color: var(--paper-ink);
  margin-bottom: 28px;
}

.tool-feature {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 160px);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: clamp(28px, 7vw, 90px);
  padding-top: clamp(50px, 8vw, 100px);
  border-top: 1px solid var(--brand-line);
}

.tool-feature figure {
  margin: 0;
  background: var(--brand-panel);
  border: 1px solid var(--brand-line);
}

.tool-feature img {
  width: 100%;
  height: auto;
}

.tool-product-link {
  margin: 1rem 0 0;
  color: var(--brand-muted);
  font-size: 0.9rem;
}

.tool-product-link a {
  color: var(--brand-ink);
  font-weight: 700;
  text-underline-offset: 0.2em;
}

.tool-proof {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 160px);
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(36px, 7vw, 96px);
  padding-top: clamp(54px, 8vw, 104px);
  border-top: 1px solid var(--brand-line);
}

.tool-proof h2 {
  max-width: 12ch;
  margin: 0;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.tool-proof header > p:last-child {
  max-width: 48ch;
  color: var(--brand-muted);
  font-size: 1rem;
  line-height: 1.65;
}

.tool-proof-ledger {
  margin: 0;
  border-top: 1px solid var(--brand-line);
}

.tool-proof-ledger div {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--brand-line);
}

.tool-proof-ledger dt {
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.tool-proof-ledger dd {
  margin: 0;
  color: var(--brand-copy);
  font-size: 1rem;
  line-height: 1.62;
}

.tool-boundary {
  grid-column: 2;
  margin: 0;
  padding: 18px 0 0;
  color: var(--brand-muted);
  border-top: 1px solid var(--brand-line);
  font-size: 0.9rem;
  line-height: 1.6;
}

.preview-boundary {
  padding: 16px 18px;
  background: oklch(0.82 0.11 82);
  color: var(--paper-ink);
  border: 1px solid oklch(0.7 0.13 82);
  font-size: 0.9rem;
  font-weight: 700;
}

.french-resource-ledger {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 160px);
  border-top: 1px solid var(--brand-line);
}

.french-resource-ledger article {
  display: grid;
  grid-template-columns: 140px 1fr 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 38px 0;
  border-bottom: 1px solid var(--brand-line);
}

.french-resource-ledger h2 {
  font-size: clamp(1.6rem, 3vw, 2.8rem);
}

.download-hero {
  width: var(--page);
  margin: 0 auto;
  min-height: 82vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 390px);
  align-items: center;
  gap: clamp(36px, 8vw, 110px);
  padding: clamp(60px, 9vw, 120px) 0;
}

.download-hero .breadcrumbs {
  margin-bottom: clamp(28px, 4vw, 54px);
}

.download-hero h1 {
  font-size: clamp(2.7rem, 6vw, 5.4rem);
}

.download-hero .book-cover img {
  transform: none;
}

.guide-download-button {
  margin-top: 22px;
}

.download-layout {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 160px);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  align-items: start;
  gap: clamp(26px, 5vw, 64px);
}

.field-article--compact {
  padding: clamp(28px, 4.5vw, 58px);
}

.preview-form-panel {
  position: sticky;
  top: calc(var(--preview-height) + var(--nav-height) + 24px);
  padding: clamp(26px, 4vw, 44px);
  color: var(--paper-copy);
  background: var(--paper);
  border: 1px solid var(--paper-line);
}

.preview-form-panel h2 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.05;
}

.preview-form-panel__notice {
  margin: 0 0 24px;
  padding: 10px 12px;
  background: oklch(0.9 0.055 205);
  color: var(--paper-ink);
  font-size: 0.82rem;
  font-weight: 700;
}

.guide-download-panel {
  position: sticky;
  top: calc(var(--preview-height) + var(--nav-height) + 24px);
  padding: clamp(28px, 4vw, 46px);
  color: var(--brand-copy);
  background: var(--brand-bg-2);
  border: 1px solid var(--brand-line);
  box-shadow: 18px 24px 0 oklch(0.11 0.028 255 / 0.35);
}

.guide-download-panel h2 {
  max-width: 14ch;
  margin: 0 0 18px;
  color: var(--brand-ink);
  font-size: clamp(1.9rem, 3.4vw, 2.8rem);
  line-height: 1.02;
}

.guide-download-panel > p:not(.resource-kicker) {
  max-width: 52ch;
}

.guide-download-panel__facts {
  margin: 28px 0;
  padding: 0;
  list-style: none;
  border-block: 1px solid var(--brand-line);
}

.guide-download-panel__facts li {
  padding: 11px 0;
  color: var(--brand-ink);
  border-bottom: 1px solid var(--brand-line);
}

.guide-download-panel__facts li:last-child {
  border-bottom: 0;
}

.guide-download-panel .guide-download-button {
  width: 100%;
  justify-content: center;
  margin-top: 0;
  text-align: center;
}

.guide-download-panel__privacy {
  margin: 18px 0 0;
  color: var(--brand-muted);
  font-size: 0.82rem;
}

.guide-download-panel__contact {
  display: inline-block;
  margin-top: 22px;
  color: var(--brand-ink);
  font-weight: 750;
  text-underline-offset: 5px;
}

.preview-form-panel form {
  display: grid;
  gap: 16px;
}

.preview-form-panel label:not(.form-consent) {
  display: grid;
  gap: 6px;
  color: var(--paper-ink);
  font-size: 0.84rem;
  font-weight: 700;
}

.preview-form-panel input,
.preview-form-panel textarea {
  width: 100%;
  padding: 12px 13px;
  color: var(--paper-ink);
  background: oklch(0.985 0.004 235);
  border: 1px solid var(--paper-line);
  border-radius: 3px;
}

.preview-form-panel input:focus,
.preview-form-panel textarea:focus {
  border-color: var(--signal-deep);
}

.form-consent {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
  padding: 14px;
  color: var(--paper-copy);
  background: oklch(0.93 0.035 82);
  border: 1px solid oklch(0.78 0.07 82);
  font-size: 0.78rem;
}

.form-consent input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

.form-consent--optional {
  background: oklch(0.96 0.015 235);
  border-color: var(--paper-line);
}

.form-status a {
  display: inline-block;
  margin-top: 8px;
  color: var(--signal-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.form-status {
  min-height: 1.5em;
  margin: 0;
  color: oklch(0.42 0.12 155);
  font-size: 0.82rem;
  font-weight: 700;
}

/* RAN Evidence Lab: an operating ledger above, technical paper below. */
.evidence-lab-hero {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(46px, 7vw, 86px) 0 clamp(72px, 9vw, 124px);
}

.evidence-lab-hero .breadcrumbs {
  margin-bottom: clamp(72px, 10vw, 142px);
}

.evidence-lab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  align-items: end;
  gap: clamp(42px, 8vw, 120px);
}

.evidence-lab-hero h1 {
  max-width: 820px;
  margin: 12px 0 0;
  color: var(--brand-ink);
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 8vw, 7.8rem);
  line-height: 0.88;
  letter-spacing: -0.065em;
  text-wrap: balance;
}

.evidence-lab-hero__statement {
  padding-top: 24px;
  border-top: 2px solid var(--signal);
}

.evidence-lab-hero__statement p {
  margin: 0;
  color: var(--brand-copy);
  font-size: clamp(1.03rem, 1.5vw, 1.22rem);
  line-height: 1.55;
}

.evidence-lab-hero__statement p + p {
  margin-top: 18px;
  color: var(--brand-muted);
  font-size: 0.92rem;
}

.evidence-charter {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: clamp(58px, 8vw, 100px) 0 0;
  border-top: 1px solid var(--brand-line);
  border-bottom: 1px solid var(--brand-line);
}

.evidence-charter div {
  padding: 24px 26px 28px 0;
}

.evidence-charter div + div {
  padding-left: 26px;
  border-left: 1px solid var(--brand-line);
}

.evidence-charter dt,
.evidence-boundary dt {
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.evidence-charter dd {
  margin: 9px 0 0;
  color: var(--brand-copy);
  font-size: 0.88rem;
  line-height: 1.55;
}

.evidence-files {
  padding: clamp(78px, 10vw, 150px) max(20px, calc((100vw - 1180px) / 2));
  color: var(--paper-copy);
  background: var(--paper);
}

.evidence-section-heading {
  max-width: 900px;
  margin-bottom: clamp(64px, 8vw, 112px);
}

.evidence-section-heading h2,
.evidence-method h2,
.evidence-lab-next h2 {
  margin: 12px 0 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.evidence-file {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  align-items: start;
  gap: clamp(42px, 7vw, 98px);
  padding: clamp(52px, 7vw, 92px) 0;
  border-top: 1px solid var(--paper-line);
}

.evidence-file--campaign {
  grid-template-columns: minmax(360px, 0.88fr) minmax(0, 1.12fr);
}

.evidence-file--campaign .evidence-file__visual {
  order: 2;
}

.evidence-file__visual {
  margin: 0;
}

.evidence-file__visual img {
  width: 100%;
  height: auto;
  border: 1px solid var(--paper-line);
}

.evidence-file__visual figcaption {
  max-width: 78ch;
  margin-top: 12px;
  color: var(--paper-muted);
  font-size: 0.72rem;
  line-height: 1.55;
}

.evidence-file__body {
  padding-top: 4px;
}

.evidence-file__label {
  margin: 0 0 22px;
  color: var(--paper-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.055em;
}

.evidence-file__label span {
  display: inline-block;
  margin-right: 10px;
  padding-right: 10px;
  color: var(--paper-ink);
  border-right: 1px solid var(--paper-line);
}

.evidence-file h3 {
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.8vw, 3.7rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.evidence-file__question {
  margin: 28px 0 30px;
  color: var(--paper-copy);
  font-size: 1.03rem;
  font-weight: 600;
  line-height: 1.58;
}

.evidence-boundary {
  margin: 0;
  border-top: 1px solid var(--paper-line);
}

.evidence-boundary div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid var(--paper-line);
}

.evidence-boundary dt {
  color: var(--paper-muted);
}

.evidence-boundary dd {
  margin: 0;
  color: var(--paper-copy);
  font-size: 0.87rem;
  line-height: 1.55;
}

.evidence-file__link {
  display: inline-block;
  margin-top: 30px;
  color: var(--paper-ink);
  font-weight: 750;
  text-decoration-color: var(--signal-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.evidence-file__link:hover {
  color: var(--signal-deep);
}

.evidence-method {
  width: var(--page);
  margin: clamp(90px, 12vw, 170px) auto;
  display: grid;
  grid-template-columns: minmax(360px, 0.8fr) minmax(0, 1.2fr);
  align-items: center;
  gap: clamp(46px, 8vw, 112px);
}

.evidence-method h2,
.evidence-lab-next h2 {
  color: var(--brand-ink);
}

.evidence-method__body > p:not(.evidence-file__label) {
  max-width: 58ch;
  font-size: 1rem;
}

.evidence-method__boundary {
  margin: 26px 0 32px;
  padding: 18px 0;
  color: var(--brand-muted);
  border-top: 1px solid var(--brand-line);
  border-bottom: 1px solid var(--brand-line);
}

.evidence-method__visual {
  margin: 0;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--brand-line);
  box-shadow: 20px 26px 0 var(--brand-bg-2);
}

.evidence-method__visual img {
  width: 100%;
  height: auto;
}

.evidence-lab-next {
  width: var(--page);
  margin: 0 auto clamp(90px, 12vw, 170px);
  padding-top: clamp(58px, 7vw, 90px);
  border-top: 1px solid var(--brand-line);
}

.evidence-lab-next p:not(.resource-kicker) {
  max-width: 62ch;
  margin: 24px 0 30px;
  font-size: 1.04rem;
}

/* RAN validation portfolio: a personal engineering dossier, not a card grid. */
.portfolio-page {
  color: var(--paper-copy);
  background: var(--paper);
}

.portfolio-page::before {
  display: none;
}

.portfolio-page .resource-nav {
  background: var(--brand-bg);
}

.portfolio-hero {
  width: var(--page);
  margin-inline: auto;
  padding: clamp(40px, 4.5vw, 62px) 0 clamp(68px, 8vw, 118px);
}

.portfolio-hero .breadcrumbs {
  margin-bottom: clamp(32px, 3.5vw, 44px);
  color: var(--paper-muted);
}

.portfolio-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.68fr);
  align-items: end;
  gap: clamp(42px, 8vw, 112px);
}

.portfolio-hero__copy {
  min-width: 0;
  padding-bottom: clamp(8px, 2vw, 26px);
}

.portfolio-hero h1 {
  max-width: 780px;
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(3.15rem, 6.15vw, 5.85rem);
  font-weight: 700;
  letter-spacing: -0.062em;
  line-height: 0.92;
  text-wrap: balance;
}

.portfolio-hero__lead {
  max-width: 61ch;
  margin: 24px 0 0;
  color: var(--paper-copy);
  font-size: clamp(1.12rem, 1.7vw, 1.34rem);
  font-weight: 600;
  line-height: 1.55;
}

.portfolio-hero__position {
  max-width: 64ch;
  margin: 16px 0 0;
  color: var(--paper-muted);
  font-size: 0.98rem;
  line-height: 1.62;
}

.portfolio-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.portfolio-page .resource-button--primary {
  background: var(--paper-ink);
  color: var(--paper) !important;
}

.portfolio-page .resource-button--ghost {
  color: var(--paper-ink) !important;
  border-color: var(--paper-muted);
}

.portfolio-page .resource-button--primary:hover,
.portfolio-page .resource-button--ghost:hover {
  color: var(--paper-ink) !important;
  background: var(--paper-2);
  border-color: var(--signal-deep);
}

.portfolio-portrait {
  position: relative;
  margin: 0;
  border-bottom: 4px solid var(--signal-deep);
}

.portfolio-portrait::after {
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 42%;
  height: 42%;
  content: "";
  border-right: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
  pointer-events: none;
}

.portfolio-portrait img {
  width: 100%;
  max-height: 610px;
  object-fit: cover;
  object-position: center 14%;
  border: 1px solid var(--paper-line);
}

.portfolio-portrait figcaption {
  padding: 12px 0 10px;
  color: var(--paper-muted);
  font-family: var(--font-mono);
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.045em;
}

.portfolio-proof-path {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: clamp(64px, 8vw, 110px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.portfolio-proof-path li {
  min-width: 0;
  padding: 22px 22px 25px 0;
}

.portfolio-proof-path li + li {
  padding-left: 22px;
  border-left: 1px solid var(--paper-line);
}

.portfolio-proof-path span,
.portfolio-proof-path strong,
.portfolio-proof-path small {
  display: block;
}

.portfolio-proof-path span {
  color: var(--signal-deep);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
}

.portfolio-proof-path strong {
  margin-top: 7px;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: 1.02rem;
}

.portfolio-proof-path small {
  margin-top: 7px;
  color: var(--paper-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.portfolio-evidence,
.portfolio-paths,
.portfolio-experience,
.portfolio-capabilities,
.portfolio-publications,
.portfolio-contact {
  width: var(--page);
  margin-inline: auto;
  padding-block: clamp(82px, 11vw, 158px);
}

.portfolio-paths {
  padding-top: 0;
}

.portfolio-paths__heading {
  display: grid;
  grid-template-columns: minmax(210px, 0.42fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 92px);
  align-items: end;
  padding: clamp(42px, 6vw, 74px) 0;
  border-top: 1px solid var(--paper-line);
}

.portfolio-paths__heading .resource-kicker {
  align-self: start;
  margin-top: 12px;
}

.portfolio-paths__heading h2 {
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5vw, 4.8rem);
  letter-spacing: -0.052em;
  line-height: 0.98;
  text-wrap: balance;
}

.portfolio-paths__heading > p:last-child {
  grid-column: 2;
  max-width: 64ch;
  margin: -48px 0 0;
  color: var(--paper-muted);
}

.portfolio-path-ledger {
  border-top: 1px solid var(--paper-ink);
  border-bottom: 1px solid var(--paper-ink);
}

.portfolio-path {
  display: grid;
  grid-template-columns: minmax(180px, 0.42fr) minmax(0, 1fr) minmax(180px, 0.34fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: center;
  padding: clamp(28px, 4vw, 46px) 0;
}

.portfolio-path + .portfolio-path {
  border-top: 1px solid var(--paper-line);
}

.portfolio-path__audience {
  margin: 0;
  color: var(--signal-deep);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.055em;
  line-height: 1.55;
}

.portfolio-path h3 {
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.3vw, 2.15rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.portfolio-path div p {
  max-width: 68ch;
  margin: 10px 0 0;
  color: var(--paper-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.portfolio-path__action {
  justify-self: end;
  color: var(--paper-ink);
  font-weight: 750;
  text-decoration-color: var(--signal-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.portfolio-path__action:hover {
  color: var(--signal-deep);
}

.portfolio-section-heading {
  max-width: 900px;
  margin-bottom: clamp(58px, 8vw, 104px);
}

.portfolio-section-heading h2,
.portfolio-product h2,
.portfolio-capabilities h2,
.portfolio-publications h2,
.portfolio-contact h2 {
  max-width: 900px;
  margin: 10px 0 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(2.55rem, 5.7vw, 5.45rem);
  letter-spacing: -0.055em;
  line-height: 0.98;
  text-wrap: balance;
}

.portfolio-section-heading > p:last-child {
  max-width: 67ch;
  margin: 24px 0 0;
  color: var(--paper-muted);
  font-size: 1.04rem;
}

.portfolio-case {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(350px, 0.92fr);
  align-items: start;
  gap: clamp(40px, 7vw, 92px);
  padding: clamp(54px, 7vw, 94px) 0;
  border-top: 1px solid var(--paper-line);
}

.portfolio-case--reverse {
  grid-template-columns: minmax(350px, 0.92fr) minmax(0, 1.08fr);
}

.portfolio-case--reverse figure {
  order: 2;
}

.portfolio-case figure {
  margin: 0;
}

.portfolio-case figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--paper-line);
}

.portfolio-case figcaption {
  max-width: 76ch;
  margin-top: 11px;
  color: var(--paper-muted);
  font-size: 0.72rem;
  line-height: 1.55;
}

.portfolio-case__label {
  margin: 0 0 18px;
  color: var(--signal-deep);
  font-family: var(--font-mono);
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.055em;
}

.portfolio-case h3 {
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.7vw, 3.65rem);
  letter-spacing: -0.045em;
  line-height: 1.03;
  text-wrap: balance;
}

.portfolio-case__ledger {
  margin: 30px 0 0;
  border-top: 1px solid var(--paper-line);
}

.portfolio-case__ledger div {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--paper-line);
}

.portfolio-case__ledger dt {
  color: var(--paper-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.portfolio-case__ledger dd {
  margin: 0;
  color: var(--paper-copy);
  font-size: 0.87rem;
  line-height: 1.55;
}

.portfolio-case__link {
  display: inline-block;
  margin-top: 28px;
  color: var(--paper-ink);
  font-weight: 750;
  text-decoration-color: var(--signal-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.portfolio-case__link:hover {
  color: var(--signal-deep);
}

.portfolio-product {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  align-items: center;
  gap: clamp(44px, 8vw, 116px);
  padding: clamp(80px, 11vw, 150px) max(20px, calc((100vw - 1180px) / 2));
  color: var(--brand-copy);
  background: var(--brand-bg);
}

.portfolio-product__visual {
  margin: 0;
}

.portfolio-product__visual img {
  width: 100%;
  height: auto;
  border: 1px solid var(--brand-line);
  box-shadow: 26px 30px 0 var(--brand-bg-2);
}

.portfolio-product h2 {
  color: var(--brand-ink);
}

.portfolio-product__body > p:not(.resource-kicker, .portfolio-boundary) {
  max-width: 65ch;
  margin: 28px 0 0;
  color: var(--brand-copy);
  font-size: 1.04rem;
}

.portfolio-product .resource-button--primary {
  color: var(--paper-ink) !important;
  background: var(--signal);
}

.portfolio-product .resource-button--ghost {
  color: var(--brand-ink) !important;
  border-color: var(--brand-line);
}

.portfolio-boundary {
  max-width: 65ch;
  margin: 26px 0 0;
  padding: 18px 0;
  color: var(--brand-muted);
  border-top: 1px solid var(--brand-line);
  border-bottom: 1px solid var(--brand-line);
}

.portfolio-experience {
  border-bottom: 1px solid var(--paper-line);
}

.portfolio-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--paper-line);
}

.portfolio-timeline li {
  display: grid;
  grid-template-columns: minmax(150px, 0.3fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 74px);
  padding: 28px 0 30px;
  border-bottom: 1px solid var(--paper-line);
}

.portfolio-timeline__period {
  color: var(--signal-deep);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.055em;
}

.portfolio-timeline h3 {
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  letter-spacing: -0.025em;
}

.portfolio-timeline p {
  max-width: 76ch;
  margin: 8px 0 0;
  color: var(--paper-muted);
  font-size: 0.91rem;
}

.portfolio-capabilities {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  align-items: start;
  gap: clamp(46px, 8vw, 120px);
}

.portfolio-capability-ledger {
  margin: 0;
  border-top: 1px solid var(--paper-line);
}

.portfolio-capability-ledger div {
  display: grid;
  grid-template-columns: minmax(140px, 0.38fr) minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--paper-line);
}

.portfolio-capability-ledger dt {
  color: var(--paper-ink);
  font-family: var(--font-display);
  font-weight: 700;
}

.portfolio-capability-ledger dd {
  margin: 0;
  color: var(--paper-muted);
  font-size: 0.9rem;
  line-height: 1.58;
}

.portfolio-publications {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  align-items: start;
  gap: clamp(46px, 8vw, 120px);
  border-top: 1px solid var(--paper-line);
}

.portfolio-publications__intro > p:last-child {
  max-width: 58ch;
  margin: 24px 0 0;
  color: var(--paper-muted);
}

.portfolio-publications__strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
  gap: clamp(14px, 2vw, 26px);
}

.portfolio-publications__strip a {
  min-width: 0;
  color: var(--paper-ink);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.42;
  text-decoration: none;
}

.portfolio-publications__strip img {
  width: 100%;
  height: auto;
  margin-bottom: 13px;
  border: 1px solid var(--paper-line);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.portfolio-publications__strip a:hover img {
  border-color: var(--signal-deep);
  transform: translateY(-5px);
}

.portfolio-contact {
  margin-bottom: clamp(72px, 10vw, 140px);
  border-top: 1px solid var(--paper-line);
}

.portfolio-contact > p:not(.resource-kicker) {
  max-width: 66ch;
  margin: 26px 0 0;
  color: var(--paper-muted);
  font-size: 1.05rem;
}

@media (max-width: 980px) {
  .resource-nav__links {
    position: fixed;
    top: calc(var(--preview-height) + var(--nav-height));
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    padding: 8px 20px 20px;
    background: var(--brand-bg);
    border-bottom: 1px solid var(--brand-line);
    transform: translateY(-125%);
    visibility: hidden;
    transition:
      transform 260ms var(--ease),
      visibility 260ms;
  }

  .resource-nav__links.is-open {
    transform: translateY(0);
    visibility: visible;
  }

  .resource-nav__links a {
    padding: 15px 4px;
    border-bottom: 1px solid var(--brand-line);
  }

  .resource-nav__menu {
    display: inline-grid;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-aside {
    position: static;
    order: -1;
  }

  .article-aside__toc {
    display: none;
  }

  .download-layout,
  .tool-feature,
  .tool-proof {
    grid-template-columns: 1fr;
  }

  .tool-boundary {
    grid-column: 1;
  }

  .playbook-hero {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .playbook-hero__plate {
    width: 100%;
  }

  .preview-form-panel,
  .guide-download-panel {
    position: static;
  }

  .french-resource-ledger article {
    grid-template-columns: 100px 1fr;
  }

  .french-resource-ledger article > :nth-child(n + 3) {
    grid-column: 2;
  }

  .evidence-lab-hero__grid,
  .evidence-file,
  .evidence-file--campaign,
  .evidence-method {
    grid-template-columns: 1fr;
  }

  .evidence-file--campaign .evidence-file__visual {
    order: 0;
  }

  .portfolio-hero__grid,
  .portfolio-case,
  .portfolio-case--reverse,
  .portfolio-product,
  .portfolio-capabilities,
  .portfolio-publications {
    grid-template-columns: 1fr;
  }

  .portfolio-portrait {
    max-width: 460px;
  }

  .portfolio-case--reverse figure {
    order: 0;
  }

  .portfolio-product__visual {
    max-width: 520px;
  }
}

@media (max-width: 720px) {
  :root {
    --page: min(100% - 28px, 1180px);
    --nav-height: 68px;
  }

  .preview-ribbon {
    font-size: 0.6rem;
  }

  .resource-nav {
    padding-inline: 14px;
  }

  .resource-nav__brand {
    font-size: 0.78rem;
  }

  .resource-nav__lang {
    display: none;
  }

  .resource-nav__button {
    min-width: 42px;
    padding-inline: 8px;
    font-size: 0.65rem;
  }

  .resource-hero,
  .hub-hero {
    padding-top: 54px;
  }

  .resource-hero {
    margin-inline: auto;
  }

  .resource-hero h1,
  .hub-hero h1,
  .download-hero h1 {
    font-size: clamp(2.4rem, 12vw, 4.5rem);
  }

  .resource-byline {
    grid-template-columns: 1fr;
  }

  .resource-byline div + div {
    border-left: 0;
    border-top: 1px solid var(--brand-line);
  }

  .field-article {
    padding: 26px 20px 34px;
  }

  .technical-plate img {
    width: 760px;
    max-width: none;
  }

  .article-next__links,
  .article-next__links .resource-button {
    width: 100%;
  }

  .tool-proof-ledger div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .resource-footer {
    flex-direction: column;
    gap: 16px;
  }

  .guide-entry,
  .guide-entry:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .guide-entry .book-cover,
  .guide-entry:nth-child(even) .book-cover {
    order: 0;
    max-width: 250px;
  }

  .guide-entry--playbook .guide-entry__diagram,
  .playbook-hero__plate {
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  .guide-entry--playbook .guide-entry__diagram img,
  .playbook-hero__plate img,
  .playbook-hero__plate figcaption {
    width: 900px;
    max-width: none;
  }

  .article-ledger > li {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px 14px;
  }

  .article-ledger__type {
    grid-column: 2;
    grid-row: 1;
  }

  .article-ledger > li > div {
    grid-column: 1 / -1;
  }

  .article-ledger__go {
    grid-column: 1 / -1;
  }

  .evidence-lab-hero .breadcrumbs {
    margin-bottom: 62px;
  }

  .evidence-lab-hero h1 {
    font-size: clamp(3rem, 16vw, 5.2rem);
  }

  .evidence-charter {
    grid-template-columns: 1fr;
  }

  .evidence-charter div,
  .evidence-charter div + div {
    padding: 20px 0;
    border-left: 0;
    border-bottom: 1px solid var(--brand-line);
  }

  .evidence-charter div:last-child {
    border-bottom: 0;
  }

  .evidence-boundary div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .evidence-method__visual {
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  .evidence-method__visual img {
    width: 860px;
    max-width: none;
  }

  .download-hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-top: 54px;
  }

  .download-hero .book-cover {
    max-width: 250px;
  }

  .playbook-hero {
    padding-top: 54px;
  }

  .playbook-hero h1 {
    font-size: clamp(2.55rem, 12vw, 4.6rem);
  }

  .playbook-hero__actions,
  .playbook-hero__actions .resource-button {
    width: 100%;
  }

  .playbook-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .playbook-meta li + li::before {
    content: "";
    margin: 0;
  }

  .playbook-proofline {
    grid-template-columns: 1fr;
  }

  .playbook-proofline div + div {
    border-left: 0;
    border-top: 1px solid var(--brand-line);
  }

  .playbook-final {
    margin-inline: -20px;
    padding-inline: 20px;
  }

  .french-resource-ledger article {
    grid-template-columns: 1fr;
  }

  .french-resource-ledger article > :nth-child(n + 3) {
    grid-column: 1;
  }

  .portfolio-hero {
    padding-top: 46px;
  }

  .portfolio-hero .breadcrumbs {
    margin-bottom: 50px;
  }

  .portfolio-hero h1 {
    font-size: clamp(2.9rem, 13.5vw, 4.7rem);
  }

  .portfolio-hero__lead {
    margin-top: 22px;
  }

  .portfolio-hero__position {
    margin-top: 14px;
  }

  .portfolio-hero .portfolio-actions {
    margin-top: 24px;
  }

  .portfolio-actions,
  .portfolio-actions .resource-button {
    width: 100%;
  }

  .portfolio-proof-path {
    grid-template-columns: 1fr;
  }

  .portfolio-proof-path li,
  .portfolio-proof-path li + li {
    padding: 17px 0 19px;
    border-left: 0;
    border-bottom: 1px solid var(--paper-line);
  }

  .portfolio-proof-path li:last-child {
    border-bottom: 0;
  }

  .portfolio-case__ledger div,
  .portfolio-path,
  .portfolio-timeline li,
  .portfolio-capability-ledger div {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .portfolio-paths__heading {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .portfolio-paths__heading .resource-kicker {
    margin-top: 0;
  }

  .portfolio-paths__heading > p:last-child {
    grid-column: 1;
    margin: 4px 0 0;
  }

  .portfolio-path {
    gap: 14px;
  }

  .portfolio-path__action {
    justify-self: start;
    margin-top: 4px;
  }

  .portfolio-product {
    padding-inline: 20px;
  }

  .portfolio-product__visual {
    width: calc(100% - 22px);
  }

  .portfolio-publications__strip {
    grid-template-columns: repeat(3, minmax(118px, 1fr));
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    padding-bottom: 14px;
  }

  .portfolio-publications__strip a {
    min-width: 118px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  .preview-ribbon,
  .resource-nav,
  .article-aside,
  .resource-button {
    display: none !important;
  }

  main {
    padding-top: 0;
  }

  .article-layout {
    display: block;
    width: 100%;
  }

  .field-article {
    padding: 0;
    border: 0;
    box-shadow: none;
  }

  .portfolio-page,
  .portfolio-product {
    color: var(--paper-copy);
    background: var(--paper);
  }

  .portfolio-product h2 {
    color: var(--paper-ink);
  }
}