:root {
  color-scheme: light;
  --paper: #f5f3ec;
  --paper-deep: #ebe8de;
  --white: #fbfaf6;
  --ink: #171715;
  --muted: #50504c;
  --quiet: #5e5e59;
  --line: #cbc8bd;
  --line-dark: #9f9c93;
  --accent: #d18a0b;
  --accent-dark: #744900;
  --good: #315f46;
  --danger: #95463e;
  --max: 1360px;
  --gutter: clamp(22px, 4vw, 64px);
  --header: 64px;
  --sans:
    "Helvetica Neue", "Neue Haas Grotesk Text Pro", "Inter", Arial, sans-serif;
  --serif: "Iowan Old Style", "Baskerville", "Times New Roman", serif;
  --mono: "SFMono-Regular", "Cascadia Mono", "Roboto Mono", Consolas, monospace;
  font-family: var(--sans);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
}

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

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

code {
  padding: 0.08rem 0.26rem;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--mono);
  font-size: 0.88em;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(16px);
}

.nav-shell {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.brand img {
  width: 31px;
  height: 31px;
  border: 1px solid var(--line);
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 44px);
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-links a {
  position: relative;
  display: inline-flex;
  height: var(--header);
  align-items: center;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: transparent;
  content: "";
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  background: var(--accent);
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line-dark);
  background: transparent;
  color: var(--ink);
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  width: 16px;
  height: 1px;
  background: currentColor;
  content: "";
}

.menu-toggle span {
  position: relative;
  display: block;
}

.menu-toggle span::before,
.menu-toggle span::after {
  position: absolute;
  left: 0;
}

.menu-toggle span::before {
  top: -5px;
}

.menu-toggle span::after {
  top: 5px;
}

main {
  overflow: hidden;
}

.landing-hero {
  min-height: calc(100svh - var(--header));
  display: grid;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(560px, 1.08fr);
  align-items: center;
  gap: clamp(48px, 6vw, 96px);
  padding-block: clamp(66px, 8vw, 118px);
}

.hero-copy h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(4rem, 7vw, 7.4rem);
  font-weight: 530;
  letter-spacing: -0.075em;
  line-height: 0.92;
}

.lead {
  max-width: 640px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.4vw, 1.32rem);
  line-height: 1.5;
}

.hero-actions,
.page-actions,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 0 22px;
  border: 1px solid var(--line-dark);
  background: transparent;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 600;
  transition:
    background 150ms ease,
    color 150ms ease,
    border-color 150ms ease,
    transform 150ms ease;
}

.button:hover,
.button:focus-visible {
  border-color: var(--ink);
  color: var(--ink);
  outline: none;
  transform: translateY(-1px);
}

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

.button.primary:hover,
.button.primary:focus-visible {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--ink);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  margin: 24px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.trust-row span:not(:last-child)::after {
  margin-inline: 10px;
  color: var(--accent);
  content: "■";
  font-size: 0.48em;
  vertical-align: 0.15em;
}

.memory-map {
  position: relative;
  display: grid;
  min-height: 520px;
  grid-template-columns: 1fr 154px 1fr;
  grid-template-rows: 1fr 96px;
  align-items: center;
  gap: 26px 34px;
  padding: 42px 16px 16px;
  font-family: var(--mono);
}

.map-inputs,
.map-outputs {
  display: grid;
  gap: 34px;
}

.map-node {
  display: grid;
  grid-template-columns: 26px minmax(70px, 1fr) 14px;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
}

.map-outputs .map-node {
  grid-template-columns: 14px 26px minmax(70px, 1fr);
}

.map-node span {
  color: var(--quiet);
}

.map-node strong {
  font-size: 0.78rem;
  font-weight: 560;
  text-transform: uppercase;
}

.map-node i {
  width: 12px;
  height: 12px;
  border: 1px solid var(--ink);
  background: var(--paper);
}

.map-node.active span,
.map-node.active strong {
  color: var(--accent-dark);
}

.map-node.active i {
  border-color: var(--accent-dark);
  background: var(--accent);
}

.map-core {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 154px;
  place-items: center;
  align-content: center;
  border: 3px double var(--ink);
  background: var(--paper);
  text-align: center;
}

.map-core strong,
.map-runtime strong {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
}

.map-core small,
.map-runtime small {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.65rem;
}

.map-lock {
  position: relative;
  width: 18px;
  height: 15px;
  margin-bottom: 14px;
  border: 2px solid var(--ink);
}

.map-lock::before {
  position: absolute;
  top: -10px;
  left: 3px;
  width: 8px;
  height: 9px;
  border: 2px solid var(--ink);
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  content: "";
}

.map-runtime {
  z-index: 2;
  grid-column: 2;
  grid-row: 2;
  display: grid;
  min-height: 76px;
  place-items: center;
  align-content: center;
  border: 1px dashed var(--line-dark);
  background: var(--paper);
  text-align: center;
}

.map-connector {
  position: absolute;
  z-index: 1;
  border-color: var(--line-dark);
  pointer-events: none;
}

.connector-left,
.connector-right {
  top: 50%;
  width: calc(50% - 77px);
  border-top: 1px solid var(--line-dark);
}

.connector-left {
  left: 11%;
}

.connector-right {
  right: 11%;
}

.connector-down {
  top: calc(50% + 76px);
  left: 50%;
  height: 88px;
  border-left: 1px dashed var(--line-dark);
}

.home-section,
.section {
  padding-block: clamp(70px, 8vw, 116px);
  border-bottom: 1px solid var(--line);
}

.section-index {
  display: grid;
  grid-template-columns: 38px 1fr auto;
  gap: 16px;
  margin-bottom: clamp(48px, 6vw, 84px);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-index span:last-child {
  color: var(--quiet);
}

.execution-loop {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: start;
}

.loop-step {
  position: relative;
  display: grid;
  justify-items: center;
  min-width: 0;
  font-family: var(--mono);
  text-align: center;
}

.loop-step:not(:last-child)::after {
  position: absolute;
  top: 67px;
  left: calc(50% + 28px);
  width: calc(100% - 56px);
  border-top: 1px solid var(--line-dark);
  content: "";
}

.loop-step span {
  color: var(--quiet);
  font-size: 0.72rem;
}

.loop-step i {
  position: relative;
  z-index: 2;
  width: 64px;
  height: 64px;
  margin: 26px 0 18px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
}

.loop-step i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  background: var(--ink);
  content: "";
  transform: translate(-50%, -50%);
}

.loop-step.active i::after {
  background: var(--accent);
}

.loop-step strong {
  font-size: 0.86rem;
  font-weight: 500;
}

.distinction-section {
  background: var(--white);
}

.distinction-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: clamp(44px, 7vw, 100px);
}

.section-index.vertical {
  grid-template-columns: 38px 1fr;
  align-content: start;
  margin: 10px 0 0;
}

.distinction-copy {
  padding-left: clamp(28px, 6vw, 80px);
  border-left: 1px solid var(--line);
}

.distinction-copy p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 6vw, 6.4rem);
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.distinction-copy p:last-child {
  margin-top: 12px;
  color: var(--accent-dark);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.pillar {
  min-height: 270px;
  padding: 24px clamp(20px, 3vw, 42px) 34px;
}

.pillar + .pillar {
  border-left: 1px solid var(--line);
}

.pillar span {
  font-family: var(--mono);
  font-size: 0.72rem;
}

.pillar span::before {
  margin-right: 12px;
  color: var(--accent);
  content: "■";
}

.pillar h2 {
  max-width: 340px;
  margin: 72px 0 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 3.3vw, 3.7rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.pillar p {
  max-width: 330px;
  margin: 24px 0 0;
  color: var(--muted);
}

.architecture-section {
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px), var(--white);
  background-size:
    100% 100%,
    calc((100% - var(--gutter) * 2) / 12) 100%;
  background-position: center;
}

.architecture-diagram {
  display: grid;
  grid-template-columns:
    minmax(130px, 1fr) 54px minmax(130px, 1fr) 54px minmax(150px, 1fr) 54px
    minmax(130px, 1fr) 54px minmax(130px, 1fr);
  align-items: center;
  min-height: 350px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.architecture-diagram article {
  display: grid;
  min-height: 270px;
  align-content: start;
  justify-items: center;
  padding: 34px 14px 24px;
  text-align: center;
}

.architecture-diagram h2 {
  margin: 0;
  font-size: clamp(0.85rem, 1.15vw, 1rem);
  font-weight: 650;
}

.architecture-diagram p,
.architecture-diagram small {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.architecture-diagram article > i {
  position: relative;
  width: 30px;
  height: 30px;
  margin: 38px 0 64px;
  border: 1px solid var(--ink);
  background: var(--white);
  font-style: normal;
  line-height: 28px;
}

.architecture-diagram article > i::after {
  position: absolute;
  top: 29px;
  left: 14px;
  height: 66px;
  border-left: 1px solid var(--line-dark);
  content: "";
}

.architecture-diagram .approval-node > i {
  width: 48px;
  height: 48px;
  margin: 28px 0 54px;
  color: var(--accent-dark);
  font-size: 1.3rem;
  line-height: 46px;
}

.architecture-diagram .approval-node > i::after {
  top: 47px;
  left: 23px;
  height: 57px;
  border-left-style: dashed;
}

.flow-label {
  position: relative;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  text-align: center;
}

.flow-label::after {
  position: absolute;
  top: 21px;
  right: -14px;
  left: -14px;
  border-top: 1px dotted var(--line-dark);
  content: "";
}

.flow-label.accent {
  color: var(--accent-dark);
}

.flow-label.reverse::after {
  border-top-style: dashed;
}

.architecture-note {
  margin: 30px 0 0 auto;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-align: right;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(24px, 4vw, 60px);
}

.evidence-item {
  margin: 0;
}

.evidence-item figcaption {
  display: grid;
  grid-template-columns: 32px 1fr;
  align-items: baseline;
  gap: 4px 12px;
  margin-bottom: 15px;
}

.evidence-item figcaption span,
.evidence-item figcaption small {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.67rem;
}

.evidence-item figcaption strong {
  font-size: 1.05rem;
}

.evidence-item figcaption small {
  grid-column: 2;
}

.product-fragment {
  min-height: 390px;
  border: 1px solid var(--line-dark);
  background: var(--white);
  font-family: var(--mono);
}

.fragment-rail {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  color: var(--quiet);
  font-size: 0.63rem;
  text-transform: uppercase;
}

.fragment-body {
  padding: clamp(24px, 4vw, 48px);
}

.fragment-body > p {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.67rem;
  text-transform: uppercase;
}

.fragment-body > h2,
.fragment-body > h3 {
  max-width: 470px;
  margin: 12px 0 40px;
  font-family: var(--sans);
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  font-weight: 540;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.fragment-task {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.fragment-task span,
.fragment-task small,
.proposal-row span,
.proposal-row small {
  color: var(--quiet);
  font-size: 0.62rem;
  font-weight: 400;
}

.fragment-task strong,
.proposal-row strong {
  font-family: var(--sans);
  font-size: 0.84rem;
  font-weight: 600;
}

.fragment-queue {
  display: grid;
  grid-template-columns: 96px repeat(3, 1fr);
  gap: 12px;
  align-items: center;
  margin-top: 24px;
  color: var(--quiet);
  font-size: 0.62rem;
}

.fragment-queue i {
  height: 1px;
  background: var(--line);
}

.proposal-row {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 12px;
  align-items: center;
  min-height: 52px;
  border-top: 1px solid var(--line);
}

.fragment-approval {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
  font-size: 0.63rem;
}

.fragment-approval span {
  color: var(--muted);
}

.fragment-approval strong {
  padding: 10px 13px;
  background: var(--accent);
  color: var(--ink);
}

.closing-section {
  background: var(--ink);
  color: var(--paper);
}

.closing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 42px;
}

.closing-grid h2 {
  margin: 0;
  font-size: clamp(3.4rem, 7vw, 7.4rem);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 0.88;
}

.closing-grid .hero-actions {
  justify-content: flex-end;
  margin: 0;
}

.closing-grid .button {
  border-color: #77756f;
  color: var(--paper);
}

.closing-grid .button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--ink);
}

/* Shared content pages */
.page-hero {
  padding-block: clamp(82px, 10vw, 150px) clamp(58px, 7vw, 96px);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  max-width: 1040px;
  margin: 0;
  font-size: clamp(3.4rem, 8vw, 8.2rem);
  font-weight: 520;
  letter-spacing: -0.075em;
  line-height: 0.9;
}

.page-hero .lead {
  max-width: 800px;
}

.system-label,
.status-badge,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 8px;
  border: 1px solid var(--line-dark);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 46px;
}

.section-heading h2,
.content-flow h2,
.roadmap-column h2,
.note-block h2,
.changelog-entry h2,
.index-card h2,
.index-card h3,
.qa-item h2,
.term-item h2,
.entity-item h2 {
  margin: 0;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.section-heading h2 {
  font-size: clamp(2.5rem, 5vw, 5.2rem);
  font-weight: 520;
}

.section-heading > p:not(.system-label),
.content-flow p,
.module p,
.note-block p,
.principle p,
.index-card p,
.roadmap-column li,
.changelog-entry p,
.qa-item p,
.term-item p,
.entity-item p,
.sidebar-box p {
  color: var(--muted);
}

.explain-grid,
.module-grid,
.principles-grid,
.note-grid,
.status-columns,
.index-grid,
.guide-grid,
.docs-grid,
.roadmap-grid,
.screenshot-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.explain-grid,
.index-grid,
.docs-grid,
.status-columns {
  grid-template-columns: repeat(3, 1fr);
}

.module-grid,
.principles-grid,
.note-grid,
.screenshot-grid {
  grid-template-columns: repeat(2, 1fr);
}

.guide-grid,
.roadmap-grid {
  grid-template-columns: repeat(4, 1fr);
}

.explain-grid article,
.module,
.principle,
.note-block,
.status-column,
.index-card,
.docs-card,
.roadmap-column {
  min-width: 0;
  padding: clamp(24px, 3vw, 38px);
  background: var(--paper);
}

.index-card {
  min-height: 270px;
}

.index-card h2,
.index-card h3 {
  margin-top: 42px;
  font-size: clamp(1.45rem, 2.4vw, 2.1rem);
}

.index-card p,
.note-block p,
.principle p,
.status-column li {
  margin: 14px 0 0;
}

.card-meta {
  min-height: 28px;
}

.text-link {
  display: inline-flex;
  margin-top: 24px;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 0.74rem;
}

.text-link::after {
  margin-left: 8px;
  content: "↗";
}

.split,
.content-grid,
.about-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.32fr);
  align-items: start;
  gap: clamp(44px, 7vw, 96px);
}

.content-flow {
  display: grid;
  gap: 42px;
}

.content-flow section {
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.content-flow h2 {
  font-size: clamp(1.8rem, 3.5vw, 3.5rem);
  font-weight: 520;
}

.content-flow p,
.content-flow ul {
  max-width: 780px;
  margin: 14px 0 0;
}

.content-flow a,
.note-block a,
.qa-item a,
.term-item a,
.entity-item a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.sidebar-box,
.definition,
.about-card,
.changelog-entry,
.qa-item,
.term-item,
.entity-item {
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  background: var(--white);
}

.sidebar-box {
  position: sticky;
  top: calc(var(--header) + 24px);
}

.sidebar-box h2,
.sidebar-box h3 {
  margin: 0;
  font-size: 1rem;
}

.sidebar-box ul {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.definition {
  border-left: 3px solid var(--accent);
}

.definition > strong {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.comparison-list,
.trust-list,
.docs-link-list {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.comparison-list div,
.trust-item,
.docs-link {
  padding: 20px 24px;
  background: var(--paper);
}

.comparison-list span,
.trust-item p,
.docs-link span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
}

.docs-card {
  min-height: 340px;
}

.docs-card h2 {
  margin: 0;
  font-size: 1.55rem;
}

.docs-card p {
  color: var(--muted);
}

.docs-link-list {
  margin-top: 20px;
}

.docs-link:hover,
.docs-link:focus-visible {
  background: var(--white);
  color: var(--ink);
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.status-column ul,
.roadmap-column ul,
.changelog-entry ul {
  display: grid;
  gap: 11px;
  margin: 20px 0 0;
  padding-left: 19px;
}

.status-badge.implemented,
.status-badge.pass {
  border-color: var(--good);
  color: var(--good);
}

.status-badge.partial,
.status-badge.optional,
.status-badge.unknown {
  border-color: var(--accent-dark);
  color: var(--accent-dark);
}

.status-badge.missing,
.status-badge.blocked {
  border-color: var(--danger);
  color: var(--danger);
}

.screenshot-card {
  margin: 0;
  background: var(--paper);
}

.screenshot-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top left;
  border-bottom: 1px solid var(--line);
}

.screenshot-card figcaption {
  display: grid;
  gap: 6px;
  padding: 20px;
}

.screenshot-card figcaption span {
  color: var(--muted);
}

.architecture-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  margin-bottom: 40px;
  border: 1px solid var(--line);
  background: var(--line);
}

.architecture-flow div {
  min-height: 170px;
  padding: 24px;
  background: var(--paper);
  font-weight: 650;
}

.architecture-flow span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 400;
}

.status-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  background: var(--white);
}

.status-table th,
.status-table td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.status-table th {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.timeline,
.qa-list,
.term-list,
.entity-list {
  display: grid;
  max-width: 940px;
  gap: 16px;
}

.date {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.machine-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 22px;
}

.about-card {
  grid-template-columns: 130px 1fr;
  max-width: 900px;
}

.portrait-mark {
  display: grid;
  width: 110px;
  height: 110px;
  place-items: center;
  border: 1px solid var(--line-dark);
  font-family: var(--serif);
  font-size: 2.3rem;
}

.site-footer {
  border-top: 1px solid #343431;
  background: var(--ink);
  color: var(--paper);
}

.footer-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.8fr);
  gap: 64px;
  padding-block: 50px;
}

.footer-brand {
  max-width: 560px;
}

.footer-brand strong {
  font-size: 1.1rem;
}

.footer-brand p {
  margin: 12px 0 0;
  color: #aaa9a2;
  font-size: 0.84rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px 24px;
  align-content: start;
  font-size: 0.78rem;
}

.footer-links a {
  color: #d5d3ca;
}

.footer-links a:hover {
  color: var(--accent);
}

.reveal {
  animation: reveal-in 520ms cubic-bezier(0.2, 0.72, 0.24, 1) both;
}

@keyframes reveal-in {
  from {
    transform: translateY(12px);
  }
}

@media (max-width: 1120px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .memory-map {
    width: min(760px, 100%);
    margin-inline: auto;
  }

  .architecture-diagram {
    grid-template-columns: repeat(5, 1fr);
  }

  .architecture-diagram .flow-label {
    display: none;
  }

  .guide-grid,
  .roadmap-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .architecture-flow {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  :root {
    --header: 58px;
  }

  .menu-toggle {
    display: grid;
  }

  .nav-links {
    position: fixed;
    top: var(--header);
    right: 0;
    left: 0;
    display: none;
    height: calc(100svh - var(--header));
    align-content: start;
    align-items: stretch;
    gap: 0;
    padding: 20px var(--gutter);
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }

  .nav-links.open {
    display: grid;
  }

  .nav-links a {
    height: auto;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
    font-size: 1.35rem;
  }

  .hero-copy h1 {
    font-size: clamp(3.7rem, 14vw, 6.5rem);
  }

  .memory-map {
    min-height: 470px;
    grid-template-columns: 1fr 126px 1fr;
    gap: 18px;
    padding-inline: 0;
  }

  .map-node {
    grid-template-columns: 22px 1fr 10px;
    gap: 6px;
  }

  .map-outputs .map-node {
    grid-template-columns: 10px 22px 1fr;
  }

  .map-node i {
    width: 9px;
    height: 9px;
  }

  .distinction-grid,
  .closing-grid,
  .split,
  .content-grid,
  .about-card,
  .footer-shell {
    grid-template-columns: 1fr;
  }

  .distinction-copy {
    padding: 30px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .pillars,
  .explain-grid,
  .index-grid,
  .docs-grid,
  .status-columns {
    grid-template-columns: 1fr;
  }

  .pillar + .pillar {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .architecture-diagram {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .architecture-diagram article {
    min-height: auto;
    grid-template-columns: 1fr 48px;
    justify-items: start;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
    text-align: left;
  }

  .architecture-diagram h2,
  .architecture-diagram p,
  .architecture-diagram small {
    grid-column: 1;
  }

  .architecture-diagram article > i,
  .architecture-diagram .approval-node > i {
    grid-column: 2;
    grid-row: 1 / span 3;
    margin: 0;
    justify-self: end;
    text-align: center;
  }

  .architecture-diagram article > i::after {
    display: none;
  }

  .evidence-grid,
  .module-grid,
  .principles-grid,
  .note-grid,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }

  .product-fragment {
    min-height: 340px;
  }

  .closing-grid .hero-actions {
    justify-content: flex-start;
  }

  .sidebar-box {
    position: static;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .hero-grid {
    gap: 36px;
    padding-block: 52px 42px;
  }

  .hero-copy h1 {
    font-size: clamp(3.15rem, 15vw, 5rem);
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .memory-map {
    min-height: 420px;
    grid-template-columns: 1fr 100px 1fr;
    grid-template-rows: 300px 74px;
    align-items: start;
    padding-top: 12px;
  }

  .map-inputs,
  .map-outputs {
    gap: 28px;
  }

  .map-node {
    grid-template-columns: 1fr 9px;
  }

  .map-outputs .map-node {
    grid-template-columns: 9px 1fr;
  }

  .map-node span {
    display: none;
  }

  .map-node strong {
    font-size: 0.64rem;
  }

  .map-core {
    min-height: 124px;
  }

  .map-runtime {
    grid-column: 1 / -1;
    width: 170px;
    justify-self: center;
  }

  .connector-left,
  .connector-right {
    top: 62px;
  }

  .connector-down {
    top: 136px;
    height: 184px;
  }

  .section-index {
    grid-template-columns: 30px 1fr;
  }

  .section-index span:last-child {
    display: none;
  }

  .execution-loop {
    grid-template-columns: 1fr;
    gap: 0;
    border-top: 1px solid var(--line);
  }

  .loop-step {
    grid-template-columns: 32px 28px 1fr;
    justify-items: start;
    align-items: center;
    min-height: 62px;
    border-bottom: 1px solid var(--line);
    text-align: left;
  }

  .loop-step:not(:last-child)::after {
    display: none;
  }

  .loop-step i {
    width: 18px;
    height: 18px;
    margin: 0;
  }

  .loop-step i::after {
    width: 5px;
    height: 5px;
  }

  .distinction-copy p {
    font-size: clamp(2.4rem, 11vw, 4rem);
  }

  .pillar {
    min-height: 230px;
  }

  .pillar h2 {
    margin-top: 48px;
  }

  .page-hero h1 {
    font-size: clamp(3.2rem, 14vw, 5.5rem);
  }

  .guide-grid,
  .roadmap-grid,
  .architecture-flow,
  .machine-links {
    grid-template-columns: 1fr;
  }

  .status-table {
    display: block;
    overflow-x: auto;
  }

  .fragment-task {
    grid-template-columns: 1fr;
  }

  .fragment-task small {
    justify-self: start;
  }

  .fragment-approval {
    align-items: flex-start;
    flex-direction: column;
  }
}

@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;
  }
}