:root {
  --ink: #211914;
  --paper: #f3eadb;
  --surface: #fbf6ec;
  --vermilion: #ad3f2e;
  --graphite: #6f5b4e;
  --mist: #cbbcab;
  --verified: #416b51;
  --line: rgba(33, 25, 20, 0.18);
  --line-strong: rgba(33, 25, 20, 0.42);
  --shadow: 0 28px 80px rgba(53, 38, 28, 0.14);
  --display: "Iowan Old Style", Baskerville, "Times New Roman", "Noto Serif", serif;
  --body: Aptos, "Segoe UI", "Noto Sans", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --max: 1440px;
  --gutter: clamp(20px, 4vw, 64px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

:root[data-resolved-theme="dark"] {
  --ink: #f4e7d2;
  --paper: #171310;
  --surface: #211b17;
  --graphite: #b9aa99;
  --mist: #4a3d35;
  --verified: #7ea68b;
  --line: rgba(244, 231, 210, 0.17);
  --line-strong: rgba(244, 231, 210, 0.4);
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 15% 5%, rgba(173, 63, 46, 0.055), transparent 28rem),
    linear-gradient(90deg, transparent 49.95%, var(--line) 50%, transparent 50.05%),
    var(--paper);
  color: var(--ink);
}

body::before {
  position: fixed;
  z-index: 20;
  inset-block: 0;
  inset-inline-start: clamp(9px, 1.4vw, 24px);
  width: 1px;
  background: var(--line);
  content: "";
  pointer-events: none;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

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

h1,
h2,
h3,
p,
dl,
dd,
ol {
  margin: 0;
}

h1,
h2 {
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.045em;
}

h1 {
  max-width: 12ch;
  font-size: clamp(3.6rem, 8vw, 8.75rem);
  line-height: 0.84;
}

h2 {
  max-width: 14ch;
  font-size: clamp(3rem, 6vw, 6.4rem);
  line-height: 0.9;
}

h3 {
  font-size: 1.05rem;
  line-height: 1.2;
}

p {
  line-height: 1.6;
}

::selection {
  color: #fff8ee;
  background: var(--vermilion);
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  inset-block-start: 12px;
  inset-inline-start: 12px;
  padding: 12px 16px;
  transform: translateY(-180%);
  background: var(--ink);
  color: var(--paper);
  font-weight: 700;
  text-decoration: none;
}

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

.page-grid {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(12px, 2vw, 28px);
}

.site-header {
  position: fixed;
  z-index: 50;
  inset-block-start: 0;
  inset-inline: 0;
  border-bottom: 1px solid transparent;
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(18px);
}

.header-shell {
  width: min(100%, var(--max));
  min-height: 76px;
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  text-decoration: none;
}

.brand-lockup {
  display: block;
  width: clamp(144px, 13vw, 172px);
}

.brand-lockup img {
  width: 100%;
  height: auto;
}

.brand-lockup__dark {
  display: none;
}

:root[data-resolved-theme="dark"] .brand-lockup__light {
  display: none;
}

:root[data-resolved-theme="dark"] .brand-lockup__dark {
  display: block;
}

.primary-nav,
.nav-links,
.header-tools,
.locale-switcher {
  display: flex;
  align-items: center;
}

.primary-nav {
  flex: 1;
  justify-content: space-between;
  gap: clamp(20px, 4vw, 72px);
}

.nav-links {
  gap: clamp(12px, 2vw, 30px);
  margin-inline-start: auto;
}

.nav-links a,
.header-cta,
.locale-switcher a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-links a {
  position: relative;
  color: var(--graphite);
}

.nav-links a::after {
  position: absolute;
  inset-inline: 0;
  inset-block-end: -6px;
  height: 1px;
  transform: scaleX(0);
  transform-origin: inline-start;
  background: var(--vermilion);
  content: "";
  transition: transform 180ms var(--ease);
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
  transform: scaleX(1);
}

.nav-links a.is-active {
  color: var(--ink);
}

.header-tools {
  gap: 10px;
}

.theme-toggle,
.nav-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  background: transparent;
  cursor: pointer;
}

.theme-icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.theme-icon--moon {
  display: none;
}

:root[data-resolved-theme="dark"] .theme-icon--sun {
  display: none;
}

:root[data-resolved-theme="dark"] .theme-icon--moon {
  display: block;
}

.locale-switcher {
  min-height: 44px;
  border: 1px solid var(--line);
}

.locale-switcher a {
  min-width: 42px;
  min-height: 42px;
  padding-inline: 9px;
  display: grid;
  place-items: center;
  color: var(--graphite);
}

.locale-switcher a + a {
  border-inline-start: 1px solid var(--line);
}

.locale-switcher a[aria-current="page"] {
  background: var(--ink);
  color: var(--paper);
}

.header-cta {
  min-height: 44px;
  padding-inline: 18px;
  display: inline-flex;
  align-items: center;
  background: var(--vermilion);
  color: #fff8ee;
}

.nav-toggle {
  display: none;
}

.hero {
  min-height: 100svh;
  padding-block: clamp(132px, 15vh, 184px) clamp(72px, 10vh, 120px);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  min-height: calc(100svh - 260px);
  align-items: center;
  row-gap: 60px;
}

.hero-copy {
  grid-column: 1 / span 6;
}

.chapter-label,
.eyebrow {
  font-family: var(--mono);
  text-transform: uppercase;
}

.chapter-label {
  margin-block-end: clamp(28px, 5vw, 64px);
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--graphite);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.chapter-label span:first-child {
  color: var(--vermilion);
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0;
}

.eyebrow {
  margin-block-end: 18px;
  color: var(--vermilion);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  line-height: 1.5;
}

.hero-lede {
  max-width: 62ch;
  margin-block-start: 30px;
  color: var(--graphite);
  font-size: clamp(1.02rem, 1.5vw, 1.25rem);
}

.hero-actions,
.install-links {
  margin-block-start: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}

.button {
  min-height: 50px;
  padding-inline: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  font-size: 0.88rem;
  font-weight: 750;
  text-decoration: none;
  transition: transform 150ms var(--ease), background-color 150ms ease, color 150ms ease;
}

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

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

.button--primary:hover {
  border-color: var(--vermilion);
  background: var(--vermilion);
  color: #fff8ee;
}

.text-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  font-weight: 700;
}

.text-link span:last-child {
  color: var(--vermilion);
  font-size: 1.2em;
}

.proof-strip {
  margin-block-start: clamp(48px, 7vw, 84px);
  border-block: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.proof-strip div {
  min-height: 94px;
  padding: 18px 14px;
}

.proof-strip div + div {
  border-inline-start: 1px solid var(--line);
}

.proof-strip dt,
.proof-strip dd {
  font-family: var(--mono);
  font-size: 0.68rem;
  line-height: 1.45;
}

.proof-strip dt {
  margin-block-end: 9px;
  color: var(--graphite);
  text-transform: uppercase;
}

.proof-strip dd {
  font-weight: 700;
}

.route-console {
  position: relative;
  grid-column: 8 / -1;
  align-self: center;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.route-console::before,
.route-console::after,
.origin-mark::before,
.origin-mark::after {
  position: absolute;
  width: 13px;
  height: 13px;
  border-color: var(--line-strong);
  content: "";
}

.route-console::before,
.origin-mark::before {
  inset-block-start: -7px;
  inset-inline-start: -7px;
  border-block-start: 1px solid;
  border-inline-start: 1px solid;
}

.route-console::after,
.origin-mark::after {
  inset-block-end: -7px;
  inset-inline-end: -7px;
  border-block-end: 1px solid;
  border-inline-end: 1px solid;
}

.console-topline,
.code-window__top {
  min-height: 42px;
  padding-inline: 14px;
  border-block-end: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.console-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--verified);
}

.console-status::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.console-book {
  position: relative;
  padding: 18px 22px 8px;
  border-block-end: 1px solid var(--line);
}

.console-book svg {
  width: 100%;
}

.book-page {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

.book-gutter {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.route {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.route--quiet {
  stroke: var(--graphite);
  stroke-dasharray: 5 9;
  stroke-width: 1.2;
  opacity: 0.52;
}

.route--active {
  stroke: var(--vermilion);
  stroke-width: 3.2;
}

.terminal--start {
  fill: var(--vermilion);
}

.terminal--end {
  fill: var(--ink);
}

.route-node {
  fill: var(--surface);
  stroke: var(--ink);
  stroke-width: 2;
}

.cut-mark {
  fill: none;
  stroke: var(--graphite);
  stroke-width: 1.2;
  opacity: 0.62;
}

.margin-note {
  position: absolute;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
}

.margin-note--one { inset-block-start: 34%; inset-inline-start: 9%; }
.margin-note--two { inset-block-start: 48%; inset-inline-start: 44%; }
.margin-note--three { inset-block-start: 29%; inset-inline-end: 7%; }

.console-ledger {
  padding: 0;
  list-style: none;
}

.console-ledger li {
  min-height: 56px;
  padding: 11px 14px;
  border-block-end: 1px solid var(--line);
  display: grid;
  grid-template-columns: 28px 70px 1fr auto;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.68rem;
}

.console-ledger li > span {
  color: var(--vermilion);
}

.console-ledger b {
  font-weight: 750;
}

.console-ledger em {
  color: var(--graphite);
  font-style: normal;
}

.console-ledger i {
  color: var(--verified);
  font-style: normal;
}

.console-footnote {
  padding: 16px 14px;
  display: flex;
  gap: 12px;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.65rem;
}

.console-footnote span:first-child {
  color: var(--vermilion);
}

.origin-section,
.mechanism-section,
.install-section {
  background: #171310;
  color: #f4e7d2;
}

:root[data-resolved-theme="dark"] .origin-section,
:root[data-resolved-theme="dark"] .mechanism-section,
:root[data-resolved-theme="dark"] .install-section {
  background: #100d0b;
}

.origin-grid {
  position: relative;
  min-height: 860px;
  padding-block: clamp(100px, 13vw, 180px);
  align-items: center;
}

.section-marker {
  grid-column: 1 / span 2;
  align-self: start;
  display: flex;
  justify-content: space-between;
  color: #9c8b7d;
  font-family: var(--mono);
  font-size: 0.7rem;
}

.section-marker span:first-child {
  color: var(--vermilion);
  font-family: var(--display);
  font-size: 2rem;
}

.origin-copy {
  grid-column: 3 / span 5;
}

.origin-lede {
  max-width: 60ch;
  margin-block-start: 36px;
  color: #b9aa99;
  font-size: clamp(1rem, 1.45vw, 1.24rem);
}

.origin-quote {
  max-width: 58ch;
  margin: 34px 0 0;
  padding-block-start: 20px;
  padding-inline-start: 24px;
  border: 0;
  border-block-start: 1px solid rgba(244, 231, 210, 0.25);
  border-inline-start: 3px solid var(--vermilion);
}

.origin-quote p {
  font-family: var(--display);
  font-size: clamp(1.2rem, 1.8vw, 1.65rem);
  line-height: 1.35;
}

.origin-quote cite {
  margin-block-start: 12px;
  display: block;
  color: #b9aa99;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-style: normal;
  letter-spacing: 0.04em;
}

.origin-quote a {
  text-underline-offset: 4px;
}

.origin-mark {
  position: relative;
  grid-column: 8 / -1;
  padding: clamp(24px, 3vw, 42px);
  border: 1px solid rgba(244, 231, 210, 0.28);
  background:
    radial-gradient(circle at 18% 20%, rgba(173, 63, 46, 0.12), transparent 36%),
    #120f0d;
}

.origin-mark img {
  width: 100%;
  height: auto;
  margin-inline: auto;
}

.margin-card {
  grid-column: 8 / -1;
  align-self: end;
  margin-block-start: 20px;
  border-block-start: 1px solid rgba(244, 231, 210, 0.25);
  padding-block-start: 16px;
  color: #b9aa99;
}

.margin-card > span {
  color: var(--vermilion);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.margin-card p {
  margin-block-start: 10px;
  font-family: var(--display);
  font-size: 1.2rem;
  line-height: 1.4;
}

.system-section,
.evidence-section,
.compatibility-section,
.faq-section {
  padding-block: clamp(92px, 12vw, 168px);
  border-block-end: 1px solid var(--line);
}

.section-head {
  align-items: end;
}

.section-head > .chapter-label {
  grid-column: 1 / span 2;
  align-self: start;
}

.section-head > div {
  grid-column: 3 / span 6;
}

.section-head > p:last-child {
  grid-column: 10 / -1;
  max-width: 42ch;
  color: var(--graphite);
  font-size: 0.98rem;
}

.skill-ledger {
  margin-block-start: clamp(64px, 9vw, 120px);
}

.skill-ledger article {
  position: relative;
  grid-column: 3 / -1;
  min-height: 120px;
  border-block-start: 1px solid var(--line);
  display: grid;
  grid-template-columns: 72px minmax(160px, 2fr) minmax(260px, 5fr) minmax(80px, 1fr);
  align-items: center;
  gap: 24px;
  transition: padding-inline 180ms var(--ease), background-color 180ms ease;
}

.skill-ledger article:last-child {
  border-block-end: 1px solid var(--line);
}

.skill-ledger article:hover {
  padding-inline: 14px;
  background: color-mix(in srgb, var(--vermilion) 5%, transparent);
}

.skill-index {
  color: var(--vermilion);
  font-family: var(--display);
  font-size: 1.5rem;
}

.skill-ledger h3 {
  font-family: var(--mono);
  font-size: 0.9rem;
}

.skill-ledger p {
  max-width: 68ch;
  color: var(--graphite);
  font-size: 0.94rem;
}

.skill-tag {
  justify-self: end;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mechanism-grid {
  min-height: 780px;
  padding-block: clamp(96px, 13vw, 180px);
  align-items: center;
}

.mechanism-copy {
  grid-column: 1 / span 5;
}

.mechanism-copy p:last-child {
  max-width: 54ch;
  margin-block-start: 30px;
  color: #aeb0aa;
}

.route-comparison {
  grid-column: 7 / -1;
  border-block: 1px solid rgba(245, 238, 226, 0.32);
}

.comparison-head,
.comparison-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.comparison-head {
  color: #aeb0aa;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.comparison-head span,
.comparison-row span {
  padding: 17px 20px;
}

.comparison-head span + span,
.comparison-row span + span {
  border-inline-start: 1px solid rgba(245, 238, 226, 0.22);
}

.comparison-row {
  min-height: 84px;
  border-block-start: 1px solid rgba(245, 238, 226, 0.18);
  align-items: center;
}

.comparison-row span {
  line-height: 1.45;
}

.comparison-row span:first-child {
  color: #7f817d;
  text-decoration: line-through;
  text-decoration-color: var(--vermilion);
  text-decoration-thickness: 2px;
}

.comparison-row span:last-child {
  color: #f5eee2;
}

.evidence-grid,
.compatibility-grid,
.install-grid,
.faq-grid {
  align-items: start;
}

.evidence-copy {
  grid-column: 1 / span 5;
  position: sticky;
  inset-block-start: 130px;
}

.evidence-copy > p:not(.chapter-label) {
  max-width: 52ch;
  margin-block: 30px;
  color: var(--graphite);
}

.evidence-gate {
  grid-column: 7 / -1;
  padding: 0;
  list-style: none;
}

.evidence-gate li {
  min-height: 150px;
  border-block-start: 1px solid var(--line);
  padding-block: 24px;
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 22px;
  align-items: start;
}

.evidence-gate li:last-child {
  border-block-end: 1px solid var(--line);
}

.evidence-gate li > span {
  color: var(--vermilion);
  font-family: var(--display);
  font-size: 1.5rem;
}

.evidence-gate b {
  display: block;
  margin-block-end: 8px;
  font-size: 1.06rem;
}

.evidence-gate p {
  max-width: 54ch;
  color: var(--graphite);
  font-size: 0.94rem;
}

.evidence-gate i {
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.63rem;
  font-style: normal;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.evidence-gate__result {
  background: color-mix(in srgb, var(--verified) 7%, transparent);
}

.evidence-gate__result i {
  color: var(--verified);
}

.compatibility-section {
  background: color-mix(in srgb, var(--surface) 78%, var(--paper));
}

.compatibility-grid > div:first-child {
  grid-column: 1 / span 5;
}

.compatibility-table {
  grid-column: 7 / -1;
  border-block: 1px solid var(--line-strong);
}

.compatibility-head,
.compatibility-table > div:not(.compatibility-head) {
  display: grid;
  grid-template-columns: 1.1fr 1fr 2fr;
  gap: 16px;
  align-items: center;
}

.compatibility-head {
  min-height: 46px;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.compatibility-table > div:not(.compatibility-head) {
  min-height: 112px;
  border-block-start: 1px solid var(--line);
}

.compatibility-table b {
  font-family: var(--mono);
  font-size: 0.82rem;
}

.compatibility-table span {
  color: var(--verified);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.compatibility-table p {
  color: var(--graphite);
  font-size: 0.9rem;
}

.install-grid {
  min-height: 720px;
  padding-block: clamp(96px, 13vw, 180px);
  align-items: center;
}

.install-copy {
  grid-column: 1 / span 5;
}

.install-copy > p:not(.chapter-label) {
  max-width: 52ch;
  margin-block-start: 30px;
  color: #aeb0aa;
}

.install-links .button--primary {
  border-color: #f5eee2;
  background: #f5eee2;
  color: #11110f;
}

.install-links .button--primary:hover {
  border-color: var(--vermilion);
  background: var(--vermilion);
  color: #fff8ee;
}

.code-window {
  grid-column: 7 / -1;
  border: 1px solid rgba(245, 238, 226, 0.34);
  background: #080907;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.3);
}

.code-window__top {
  color: #91938e;
  border-color: rgba(245, 238, 226, 0.18);
}

.code-window__top button {
  min-width: 74px;
  min-height: 32px;
  border: 1px solid rgba(245, 238, 226, 0.28);
  background: transparent;
  color: #f5eee2;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.65rem;
}

.code-window__top button.is-copied {
  border-color: var(--verified);
  color: var(--verified);
}

.code-window pre {
  min-height: 340px;
  margin: 0;
  padding: clamp(26px, 4vw, 52px);
  overflow-x: auto;
  color: #f5eee2;
  font-family: var(--mono);
  font-size: clamp(0.76rem, 1.1vw, 0.96rem);
  line-height: 2;
}

.prompt {
  color: var(--vermilion);
}

.result {
  color: #70b996;
}

.faq-grid > div:first-child {
  grid-column: 1 / span 5;
}

.faq-list {
  grid-column: 7 / -1;
  border-block-start: 1px solid var(--line-strong);
}

.faq-list details {
  border-block-end: 1px solid var(--line);
}

.faq-list summary {
  min-height: 86px;
  padding-block: 22px;
  padding-inline-end: 52px;
  display: flex;
  align-items: center;
  position: relative;
  cursor: pointer;
  font-family: var(--display);
  font-size: clamp(1.18rem, 2vw, 1.65rem);
  font-weight: 650;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  inset-inline-end: 2px;
  color: var(--vermilion);
  content: "+";
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 64ch;
  padding-block: 0 26px;
  color: var(--graphite);
}

.site-footer {
  padding-block: 52px;
  background: var(--paper);
}

.footer-grid {
  align-items: start;
}

.footer-brand {
  grid-column: 1 / span 3;
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand p {
  display: flex;
  flex-direction: column;
  font-family: var(--display);
  line-height: 1.1;
}

.footer-brand span {
  margin-block-start: 4px;
  color: var(--vermilion);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-notice {
  grid-column: 5 / span 5;
  max-width: 65ch;
  color: var(--graphite);
  font-size: 0.78rem;
}

.footer-links {
  grid-column: 11 / -1;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 9px;
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
}

html[dir="rtl"] .chapter-label,
html[dir="rtl"] .hero-actions,
html[dir="rtl"] .install-links,
html[dir="rtl"] .console-footnote,
html[dir="rtl"] .footer-brand {
  flex-direction: row-reverse;
  justify-content: flex-end;
}

html[dir="rtl"] .console-ledger,
html[dir="rtl"] .code-window,
html[dir="rtl"] .route-console {
  direction: ltr;
}

[data-reveal] {
  opacity: 1;
  transform: none;
}

body.motion-ready [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

body.motion-ready [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (max-width: 1160px) {
  .nav-links {
    display: none;
  }

  .primary-nav {
    justify-content: flex-end;
  }

  .hero-copy {
    grid-column: 1 / span 7;
  }

  .route-console {
    grid-column: 8 / -1;
  }

  .origin-copy {
    grid-column: 3 / span 5;
  }

  .origin-mark {
    grid-column: 8 / -1;
  }

  .margin-card {
    grid-column: 8 / -1;
  }
}

@media (max-width: 900px) {
  body::before {
    display: none;
  }

  .header-shell {
    min-height: 68px;
  }

  .brand-lockup {
    width: 146px;
  }

  .nav-toggle {
    display: grid;
    position: relative;
  }

  .nav-toggle span {
    position: absolute;
    width: 18px;
    height: 1px;
    background: currentColor;
    transition: transform 180ms var(--ease);
  }

  .nav-toggle span:first-child { transform: translateY(-4px); }
  .nav-toggle span:last-child { transform: translateY(4px); }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: rotate(-45deg); }

  .primary-nav {
    position: fixed;
    z-index: -1;
    inset: 68px 0 auto;
    max-height: calc(100svh - 68px);
    padding: 28px var(--gutter) 36px;
    border-block: 1px solid var(--line);
    display: none;
    overflow-y: auto;
    background: var(--paper);
  }

  .primary-nav.is-open {
    display: block;
  }

  .nav-links {
    display: grid;
    gap: 0;
    margin: 0 0 24px;
  }

  .nav-links a {
    min-height: 54px;
    border-block-end: 1px solid var(--line);
    display: flex;
    align-items: center;
  }

  .header-tools {
    display: grid;
    grid-template-columns: 44px 1fr;
    align-items: start;
  }

  .locale-switcher {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
  }

  .header-cta {
    grid-column: 1 / -1;
    justify-content: center;
  }

  body.nav-open {
    overflow: hidden;
  }

  .hero {
    padding-block-start: 116px;
  }

  .hero-copy,
  .route-console,
  .origin-copy,
  .origin-mark,
  .margin-card,
  .section-head > .chapter-label,
  .section-head > div,
  .section-head > p:last-child,
  .mechanism-copy,
  .route-comparison,
  .evidence-copy,
  .evidence-gate,
  .compatibility-grid > div:first-child,
  .compatibility-table,
  .install-copy,
  .code-window,
  .faq-grid > div:first-child,
  .faq-list {
    grid-column: 1 / -1;
  }

  .route-console {
    margin-block-start: 24px;
  }

  .origin-grid,
  .mechanism-grid,
  .install-grid {
    min-height: auto;
    row-gap: 52px;
  }

  .section-marker {
    display: none;
  }

  .origin-mark {
    width: min(100%, 360px);
    justify-self: center;
  }

  .margin-card {
    margin-block-start: 0;
  }

  .section-head,
  .evidence-grid,
  .compatibility-grid,
  .faq-grid {
    row-gap: 32px;
  }

  .section-head > .chapter-label {
    margin-block-end: 0;
  }

  .skill-ledger article {
    grid-column: 1 / -1;
    grid-template-columns: 46px 1fr auto;
    gap: 14px;
    padding-block: 22px;
  }

  .skill-ledger article p {
    grid-column: 2 / -1;
  }

  .evidence-copy {
    position: static;
  }

  .evidence-gate,
  .compatibility-table,
  .code-window,
  .faq-list {
    margin-block-start: 24px;
  }

  .footer-grid {
    row-gap: 32px;
  }

  .footer-brand { grid-column: 1 / span 5; }
  .footer-notice { grid-column: 6 / -1; }
  .footer-links { grid-column: 1 / -1; flex-direction: row; align-items: center; }
}

@media (max-width: 600px) {
  :root {
    --gutter: 18px;
  }

  h1 {
    font-size: clamp(3.15rem, 17vw, 5.5rem);
  }

  h2 {
    font-size: clamp(2.65rem, 14vw, 4.5rem);
  }

  .brand-wordmark strong {
    font-size: 1.05rem;
  }

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

  .proof-strip div + div {
    border-inline-start: 0;
    border-block-start: 1px solid var(--line);
  }

  .console-book {
    padding-inline: 8px;
  }

  .console-ledger li {
    grid-template-columns: 24px 62px 1fr;
  }

  .console-ledger i {
    display: none;
  }

  .skill-ledger article {
    grid-template-columns: 40px 1fr;
  }

  .skill-ledger article p,
  .skill-tag {
    grid-column: 2 / -1;
  }

  .skill-tag {
    justify-self: start;
  }

  .comparison-head,
  .comparison-row {
    grid-template-columns: 1fr;
  }

  .comparison-head span + span,
  .comparison-row span + span {
    border-inline-start: 0;
    border-block-start: 1px solid rgba(245, 238, 226, 0.13);
  }

  .comparison-row span {
    min-height: 68px;
    display: flex;
    align-items: center;
  }

  .evidence-gate li {
    grid-template-columns: 42px 1fr;
  }

  .evidence-gate i {
    grid-column: 2;
  }

  .compatibility-head {
    display: none;
  }

  .compatibility-table > div:not(.compatibility-head) {
    min-height: 0;
    padding-block: 22px;
    grid-template-columns: 1fr auto;
  }

  .compatibility-table p {
    grid-column: 1 / -1;
  }

  .code-window pre {
    min-height: 280px;
    padding: 24px 18px;
  }

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

  .footer-links {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}