:root {
  color-scheme: dark;
  /* Ground is neutral black. Blue lives on component surfaces, not the page. */
  --canvas: #000000;
  --soft: #0c0c0e;
  --soft-blue: #0a0d12;
  --ink: #f2f3f5;
  --muted: #a0a2a8;
  --quiet: #787a82;
  --line: rgba(140, 190, 255, 0.13);
  --line-strong: rgba(140, 190, 255, 0.28);
  --accent: #4cc2ff;
  --accent-strong: #8ad9ff;
  --accent-soft: rgba(76, 194, 255, 0.11);
  --observed: #6ea6ff;
  --observed-soft: rgba(110, 166, 255, 0.13);
  --warning: #f5b76b;
  --warning-soft: rgba(245, 183, 107, 0.12);
  --night: #000000;
  --night-muted: #8a8c94;
  --chrome-0: #ffffff;
  --chrome-1: #cfe4f7;
  --chrome-2: #7f9ec2;
  --chrome-3: #33506f;
  --shadow-frame: 0 28px 80px rgba(0, 0, 0, 0.66), 0 2px 10px rgba(0, 0, 0, 0.5);
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter",
    "Helvetica Neue", "Pretendard", "Noto Sans KR", "Noto Sans JP",
    "Noto Sans SC", Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter",
    "Helvetica Neue", "Pretendard", "Noto Sans KR", "Noto Sans JP",
    "Noto Sans SC", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "SF Mono", ui-monospace, Consolas,
    "Liberation Mono", monospace;
  --page: 1184px;
  --measure: 720px;
  --gutter: 56px;
  --section: 72px;
  --radius-frame: 8px;
  --radius-control: 6px;
  --transition: 160ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p,
figure,
blockquote,
dl,
dd {
  margin-top: 0;
}

h1,
h2 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0;
}

h1 {
  font-size: 52px;
  line-height: 1.08;
}

h2 {
  font-size: 38px;
  line-height: 1.16;
}

h3 {
  font-size: 18px;
  line-height: 1.33;
  letter-spacing: 0;
}

code,
pre {
  font-family: var(--font-mono);
}

code {
  overflow-wrap: anywhere;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  transform: translateY(-160%);
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--canvas);
  text-decoration: none;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px max(var(--gutter), calc((100vw - var(--page)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.74);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
}

.brand {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
}

.brand--link {
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(150deg, #eaf6ff 0%, #9fc4e6 26%, #2c4767 52%, #d8ecff 74%, #6f9dc9 100%);
  color: #05131f;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 2px rgba(0, 0, 0, 0.5),
    0 4px 14px rgba(76, 194, 255, 0.24);
}

.brand::before {
  content: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}

.nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: var(--radius-control);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition);
}

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

.nav__icon {
  width: 40px;
  padding: 0;
}

.nav__icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--canvas);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition), background-color var(--transition), border-color var(--transition);
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: var(--soft);
}

.button:active {
  transform: scale(0.98);
}

.button:disabled,
.button[aria-disabled="true"] {
  color: var(--quiet);
  border-color: var(--line);
  background: var(--soft);
  cursor: not-allowed;
  transform: none;
}

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

.button--primary:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: var(--night);
}

.button--secondary {
  background: var(--soft);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 600;
  text-underline-offset: 4px;
}

.text-link::after {
  content: "\2192";
  transition: transform var(--transition);
}

.text-link:hover::after {
  transform: translateX(3px);
}

:focus-visible {
  outline: 3px solid var(--accent-strong);
  outline-offset: 3px;
}

.trust-pill,
.new-badge {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 16px;
}

.eyebrow,
.home-kicker,
.article-section-label,
.blog-kicker {
  margin-bottom: 12px;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.state-label {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  line-height: 16px;
  text-transform: uppercase;
}

.state-label i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.state-label--ready {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.state-label--prepared {
  background: var(--warning-soft);
  color: var(--warning);
}

.state-label--observed {
  background: var(--observed-soft);
  color: var(--observed);
}

.state-label--waiting {
  background: var(--soft);
  color: var(--quiet);
}

.product-frame {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-frame);
  background: var(--canvas);
  box-shadow: var(--shadow-frame);
}

.product-frame__bar {
  min-height: 48px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--quiet);
  font-size: 12px;
  text-align: center;
}

.product-frame__bar > :last-child {
  justify-self: end;
}

.product-frame__mark {
  justify-self: start;
  color: var(--ink);
  font-weight: 800;
}

.product-frame__body {
  min-height: 430px;
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
}

.product-frame__rail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 12px;
  border-right: 1px solid var(--line);
  background: rgba(126, 186, 255, 0.05);
}

.product-frame__rail span {
  min-height: 36px;
  display: flex;
  align-items: center;
  padding: 8px 10px;
  border-radius: var(--radius-control);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.product-frame__rail .is-active {
  background: var(--canvas);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line);
}

.product-frame__main {
  display: grid;
  align-content: start;
  gap: 18px;
  padding: 24px;
}

.message-intake {
  display: grid;
  gap: 6px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.message-intake span,
.contract-list dt,
.route-lens span {
  color: var(--quiet);
  font-size: 11px;
  font-weight: 700;
  line-height: 16px;
  text-transform: uppercase;
}

.message-intake strong {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.3;
}

.contract-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(220px, 0.9fr);
  gap: 16px;
}

.contract-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.contract-list div {
  min-height: 46px;
  display: grid;
  grid-template-columns: 92px 1fr;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.contract-list dt,
.contract-list dd {
  margin: 0;
}

.contract-list dd {
  font-size: 13px;
  font-weight: 600;
}

.evidence-stack {
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
}

.evidence-stack > div {
  min-height: 54px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
}

.evidence-stack > div + div {
  border-top: 1px solid var(--line);
}

.evidence-stack strong {
  font-size: 12px;
  line-height: 18px;
}

.boundary-note,
.claim-boundary {
  margin: 0;
  padding: 12px 14px;
  border-left: 3px solid var(--warning);
  background: var(--warning-soft);
  color: #f7d5a4;
  font-size: 13px;
  line-height: 20px;
}

.command,
.install-terminal {
  overflow-x: auto;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--night);
  color: var(--ink);
}

.command code,
.install-terminal code {
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px max(var(--gutter), calc((100vw - var(--page)) / 2));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.showcase-page {
  background: var(--soft);
}

.showcase-shell {
  width: min(calc(100% - (2 * var(--gutter))), var(--page));
  margin: 0 auto;
  padding: 64px 0 96px;
}

.showcase-header {
  max-width: var(--measure);
  margin-bottom: 56px;
}

.showcase-header h1 {
  margin: 18px 0 12px;
}

.showcase-header p {
  color: var(--muted);
}

.showcase-section {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.showcase-section h2 {
  margin-bottom: 20px;
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 700;
  line-height: 28px;
}

.showcase-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.home-page {
  background: var(--canvas);
}

.home-main {
  overflow: clip;
}

.home-hero {
  width: min(calc(100% - (2 * var(--gutter))), var(--page));
  min-height: calc(100vh - 64px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(360px, 0.8fr) minmax(560px, 1.2fr);
  align-items: center;
  gap: 56px;
  padding: 72px 0 64px;
}

.home-hero__content {
  min-width: 0;
  max-width: 520px;
}

.home-hero__visual {
  position: relative;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-frame);
  background: var(--night);
  box-shadow: var(--shadow-frame);
}

.home-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: inherit;
  pointer-events: none;
}

.home-hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-hero h1 {
  margin: 18px 0 16px;
}

.home-tagline {
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.3;
}

.home-lead {
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.hero-install {
  min-width: 0;
  max-width: 100%;
  margin: 24px 0 18px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-frame);
  background: var(--night);
  color: var(--ink);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.55);
}

.hero-install__bar {
  min-height: 34px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--night-muted);
}

.hero-install__bar span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--quiet);
}

.hero-install__bar strong {
  margin-left: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0;
}

.hero-install code {
  display: block;
  max-width: 100%;
  padding: 14px 16px 16px;
  font-size: 12px;
  line-height: 1.7;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.home-actions,
.feature-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 12px;
}

.hero-proof span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-proof span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-workbench {
  width: min(calc(100% - (2 * var(--gutter))), var(--page));
  margin: 0 auto;
}

.workbench-section {
  padding: 56px 0;
  border-top: 1px solid var(--line);
  background: var(--soft-blue);
}

.proof-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.proof-rail > div {
  min-height: 128px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 24px;
}

.proof-rail > div + div {
  border-left: 1px solid var(--line);
}

.proof-rail strong {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 400;
}

.proof-rail span {
  color: var(--muted);
  font-size: 13px;
}

.home-section {
  border-bottom: 1px solid var(--line);
}

.home-section__inner,
.section-heading,
.install-panel {
  width: min(calc(100% - (2 * var(--gutter))), var(--page));
  margin: 0 auto;
}

.home-section__inner {
  padding: var(--section) 0;
}

.section-heading {
  padding: var(--section) 0 36px;
}

.surfaces-section {
  background: var(--soft);
}

.surfaces-section .home-section__inner {
  padding-top: 0;
}

.surface-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.surface-card {
  display: flex;
  flex-direction: column;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--canvas);
  box-shadow: var(--shadow-frame);
}

.surface-card img {
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--line);
}

.surface-card figcaption {
  display: grid;
  gap: 4px;
  margin-top: auto;
  padding: 16px 20px 18px;
}

.surface-card figcaption strong {
  font-size: 15px;
}

.surface-card figcaption code {
  font-family: var(--font-mono);
  font-size: 13px;
}

.surface-card figcaption span {
  color: var(--muted);
  font-size: 13px;
}

.section-heading--split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.7fr);
  gap: 72px;
  align-items: end;
}

.section-heading h2,
.capability-band h2 {
  margin-bottom: 12px;
}

.section-heading p,
.capability-band__copy > p,
.feature-copy > p,
.docs-section > p {
  color: var(--muted);
}

.family-nav {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.family-nav a {
  min-height: 86px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition);
}

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

.family-nav a:hover {
  background: var(--soft);
  color: var(--ink);
}

.family-nav span {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.family-nav strong {
  font-size: 13px;
  line-height: 18px;
}

.capability-band {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.25fr);
  gap: 72px;
  align-items: center;
  padding: var(--section) 0;
}

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

.capability-band--reverse .capability-band__copy {
  order: 2;
}

.capability-band--reverse .capability-band__specimen {
  order: 1;
}

.capability-band__copy h3 {
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
}

.capability-band__copy ul {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.capability-band__copy li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.capability-band__specimen {
  min-width: 0;
}

.specimen-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--canvas);
}

.specimen-panel__head {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
  color: var(--muted);
  font-size: 12px;
}

.specimen-panel__body {
  padding: 18px;
}

.route-list,
.impact-list,
.provider-list,
.memory-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.route-list > div,
.impact-list > div,
.provider-list > div,
.memory-list > div {
  min-height: 52px;
  display: grid;
  grid-template-columns: 136px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.route-list span:first-child,
.impact-list span:first-child,
.provider-list span:first-child,
.memory-list span:first-child {
  color: var(--quiet);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.handoff-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
}

.handoff-flow > div {
  min-height: 108px;
  display: grid;
  align-content: space-between;
  gap: 16px;
  padding: 14px;
}

.handoff-flow > div + div {
  border-left: 1px solid var(--line);
}

.handoff-flow span {
  color: var(--quiet);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.handoff-flow strong {
  font-size: 13px;
  line-height: 18px;
}

.impact-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 18px;
  background: var(--soft-blue);
}

.impact-callout strong {
  display: block;
  margin-bottom: 4px;
}

.impact-callout p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.reference-grid,
.docs-grid,
.usecase-grid,
.image-format-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.reference-link,
.case-card,
.image-format-card,
.docs-start-card,
.docs-lane-map a {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--canvas);
}

a.reference-link,
.docs-start-card,
.docs-lane-map a {
  color: inherit;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition), background-color var(--transition);
}

a.reference-link:hover,
.docs-start-card:hover,
.docs-lane-map a:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: var(--soft);
}

.reference-link span,
.docs-start-card span,
.docs-lane-map span {
  display: block;
  margin-bottom: 10px;
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.reference-link h3,
.case-card h3,
.image-format-card h3 {
  margin-bottom: 8px;
}

.reference-link p,
.case-card p,
.image-format-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 21px;
}

.reference-link figure {
  margin: -20px -20px 18px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  aspect-ratio: 16 / 10;
  background: var(--soft);
}

.reference-link img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.install-section {
  background: var(--soft);
}

.install-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: 72px;
  align-items: center;
  padding: var(--section) 0;
}

.install-panel h2 {
  margin-bottom: 12px;
}

.install-panel p {
  color: var(--muted);
}

.feature-contract,
.docs-note {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--soft);
}

.route-lens {
  display: grid;
  gap: 8px;
}

.route-lens span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.lifecycle-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
}

.lifecycle-step {
  min-height: 150px;
  padding: 18px;
}

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

.lifecycle-step > span {
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.button-row button,
.button-row span {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--canvas);
}

.button-row button:disabled {
  color: var(--quiet);
  background: var(--soft);
}

.docs-page {
  background: var(--canvas);
}

.docs-shell {
  width: min(calc(100% - (2 * var(--gutter))), var(--page));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 56px;
  padding: 48px 0 96px;
}

.docs-toc {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 112px);
  overflow-y: auto;
  display: grid;
  gap: 2px;
  padding-right: 16px;
}

.docs-toc--mobile {
  display: none;
}

.docs-toc a {
  padding: 7px 10px;
  border-radius: var(--radius-control);
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}

.docs-toc a:hover {
  background: var(--soft);
  color: var(--ink);
}

.docs-content {
  min-width: 0;
}

.docs-hero,
.feature-hero,
.architecture-article-hero {
  padding: 32px 0 48px;
  border-bottom: 1px solid var(--line);
}

.docs-hero h1,
.feature-hero h1,
.architecture-article-hero h1 {
  max-width: 860px;
  margin-bottom: 16px;
  font-size: 44px;
  line-height: 1.1;
}

.docs-hero > p:last-child,
.feature-hero > p,
.feature-hero__copy > p,
.architecture-article-hero > p {
  max-width: var(--measure);
  color: var(--muted);
}

.docs-start-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.docs-start-card {
  display: grid;
  gap: 4px;
}

.docs-start-card strong {
  font-size: 16px;
}

.docs-start-card em,
.docs-lane-map em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}

.docs-section,
.feature-section,
.architecture-article-section,
.architecture-blog-section,
.architecture-longform {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.docs-section h2,
.feature-section h2,
.architecture-article-section h2,
.architecture-blog-section h2,
.architecture-longform h2 {
  margin-bottom: 14px;
  font-size: 32px;
  line-height: 1.2;
}

.docs-section h3,
.feature-section h3,
.architecture-longform h3 {
  margin-top: 28px;
}

.docs-section p,
.docs-section li,
.feature-section p,
.feature-section li,
.architecture-prose p,
.architecture-prose li {
  color: var(--muted);
}

.docs-value-rail {
  display: grid;
  gap: 0;
}

.docs-value-rail {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
  border: 1px solid var(--line);
}

.docs-value-rail article {
  min-height: 168px;
  padding: 16px;
}

.docs-value-rail article + article {
  border-left: 1px solid var(--line);
}

.docs-value-rail article:nth-child(3n + 1) {
  border-left: 0;
}

.docs-value-rail article:nth-child(n + 4) {
  border-top: 1px solid var(--line);
}

.docs-value-rail span {
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
}

.docs-value-rail strong {
  display: block;
  margin: 24px 0 8px;
  font-size: 14px;
}

.docs-value-rail p {
  font-size: 13px;
  line-height: 19px;
}

.docs-lane-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.docs-lane-map a {
  display: grid;
  gap: 4px;
}

.docs-two-column,
.feature-section--split {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  gap: 40px;
  align-items: start;
}

.docs-list {
  margin: 16px 0 0;
  padding-left: 20px;
}

.feature-shell,
.architecture-post-shell {
  width: min(calc(100% - (2 * var(--gutter))), 1000px);
  margin: 0 auto;
  padding: 32px 0 96px;
}

.feature-hero--imagegen,
.feature-hero--loop {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  gap: 40px;
  align-items: center;
}

.feature-actions {
  margin-top: 24px;
}

.feature-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 20px;
  border: 1px solid var(--line);
}

.feature-flow span {
  min-height: 72px;
  display: grid;
  place-items: center;
  padding: 12px;
  overflow-wrap: anywhere;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
}

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

.feature-section--split .feature-flow {
  grid-template-columns: 1fr;
}

.feature-section--split .feature-flow span {
  min-height: 48px;
  justify-items: start;
  text-align: left;
}

.feature-section--split .feature-flow span + span {
  border-top: 1px solid var(--line);
  border-left: 0;
}

.loop-image-frame,
.imagegen-doc-poster {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--soft);
}

.loop-image-frame img,
.imagegen-doc-poster img {
  width: 100%;
  height: auto;
}

.discord-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--soft);
}

.discord-channel {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  font-weight: 700;
}

.discord-message {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  padding: 14px;
}

.discord-message + .discord-message {
  border-top: 1px solid var(--line);
}

.avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--canvas);
  font-size: 12px;
  font-weight: 700;
}

.avatar--bot {
  background: var(--accent);
}

.message-meta {
  margin-bottom: 4px;
  font-size: 12px;
}

.message-body p {
  margin-bottom: 0;
}

.architecture-mermaid-map {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-top: 24px;
}

.arch-node {
  min-height: 118px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--soft);
}

.arch-node span {
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.arch-node strong {
  font-size: 13px;
  line-height: 18px;
}

.architecture-article-hero {
  min-height: 0;
}

.architecture-hero-board,
.platform-chip-wall,
.source-chip-grid,
.architecture-example-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.architecture-hero-board span,
.platform-chip-wall span,
.source-chip-grid a,
.architecture-example-lines span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--soft);
  color: var(--muted);
  font-size: 12px;
  text-decoration: none;
}

.language-switch {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.language-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

#arch-lang-en:focus-visible ~ .architecture-post-shell label[for="arch-lang-en"],
#arch-lang-ko:focus-visible ~ .architecture-post-shell label[for="arch-lang-ko"] {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 3px;
}

.language-switch label {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  cursor: pointer;
}

.lang-panel--ko {
  display: none;
}

#arch-lang-ko:checked ~ .architecture-post-shell .lang-panel--en {
  display: none;
}

#arch-lang-ko:checked ~ .architecture-post-shell .lang-panel--ko {
  display: block;
}

#arch-lang-en:checked ~ .architecture-post-shell label[for="arch-lang-en"],
#arch-lang-ko:checked ~ .architecture-post-shell label[for="arch-lang-ko"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.feature-section--split .usecase-grid {
  grid-template-columns: 1fr;
}

.architecture-prose {
  max-width: 760px;
}

.architecture-prose p,
.architecture-prose li {
  font-size: 16px;
  line-height: 1.75;
}

.architecture-thesis,
.article-callout,
.loop-post {
  margin: 24px 0;
  padding: 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}

.comparison-shell {
  width: min(calc(100% - (2 * var(--gutter))), var(--page));
  margin: 0 auto;
  padding: 64px 0 88px;
}

.comparison-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.38fr);
  gap: 48px;
  align-items: end;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.comparison-hero--baseline {
  display: block;
  max-width: 760px;
}

.comparison-hero h1 {
  max-width: 820px;
  margin-bottom: 16px;
  font-size: clamp(42px, 5vw, 66px);
}

.comparison-hero > p,
.comparison-hero--applied > div > p,
.comparison-hero__state span,
.comparison-section > .section-heading > p,
.comparison-evidence > div > p {
  color: var(--muted);
}

.comparison-hero__state {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--soft);
}

.comparison-hero__state strong,
.baseline-brief__message strong {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  line-height: 1.2;
}

.baseline-brief {
  max-width: 860px;
  padding: 40px 0 56px;
}

.baseline-brief__message {
  display: grid;
  gap: 10px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--soft);
}

.baseline-brief__message > span,
.baseline-brief__cards span,
.direction-grid span,
.intent-grid dt {
  color: var(--quiet);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.baseline-brief__cards,
.baseline-wall,
.direction-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.baseline-brief__cards {
  margin-top: 12px;
}

.baseline-brief__cards article,
.baseline-wall article {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--canvas);
}

.baseline-brief__cards article {
  display: grid;
  gap: 8px;
}

.baseline-brief__cards article strong {
  font-size: 15px;
}

.baseline-brief__cards article p,
.baseline-wall p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.comparison-section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

.comparison-section .section-heading {
  width: auto;
  padding: 0 0 32px;
}

.baseline-wall {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.baseline-wall article {
  min-height: 168px;
}

.baseline-wall h3 {
  margin-bottom: 10px;
}

.orchestration-frame {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-frame);
  box-shadow: var(--shadow-frame);
}

.orchestration-frame__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--night);
  color: var(--night-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.orchestration-frame__body {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}

.orchestration-intent,
.orchestration-direction {
  padding: 32px;
}

.orchestration-intent {
  background: var(--soft-blue);
}

.orchestration-direction {
  border-left: 1px solid var(--line);
}

.orchestration-frame h2,
.comparison-evidence h2 {
  margin-bottom: 18px;
  font-size: 30px;
}

.intent-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 28px 0 0;
  border-top: 1px solid var(--line);
}

.intent-grid div {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.intent-grid dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
}

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

.direction-grid div {
  display: grid;
  gap: 5px;
  min-height: 82px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
}

.direction-grid strong {
  font-size: 14px;
  line-height: 18px;
}

.lane-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
}

.lane-rail li {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 16px;
  min-height: 208px;
  padding: 18px;
}

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

.lane-rail li > span,
.lane-rail em {
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  font-style: normal;
  font-weight: 700;
}

.lane-rail strong {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
}

.lane-rail p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.comparison-evidence {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 48px;
  align-items: start;
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

.evidence-rail {
  display: grid;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
}

.evidence-rail > div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 12px;
  align-items: center;
  padding: 16px;
}

.evidence-rail > div + div {
  border-top: 1px solid var(--line);
}

.evidence-rail p {
  grid-column: 2;
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.comparison-boundary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-frame);
  background: var(--soft);
}

.comparison-boundary p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.comparison-boundary--applied {
  grid-template-columns: auto minmax(0, 1fr);
}

.comparison-boundary--applied .button-row {
  grid-column: 2;
}

@media (max-width: 1120px) {
  .home-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .home-hero__content {
    max-width: 680px;
  }

}

@media (max-width: 1040px) {
  :root {
    --gutter: 32px;
  }

  .family-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .family-nav a:nth-child(4) {
    border-left: 0;
  }

  .capability-band {
    gap: 40px;
  }

  .docs-shell {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 32px;
  }

  .docs-two-column {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .handoff-flow {
    grid-template-columns: 1fr 1fr;
  }

  .handoff-flow > div + div {
    border-left: 0;
  }

  .handoff-flow > div:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .handoff-flow > div:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

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

  .docs-value-rail article + article {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .docs-value-rail article:nth-child(even) {
    border-left: 1px solid var(--line);
  }

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

@media (max-width: 760px) {
  :root {
    --gutter: 20px;
    --section: 48px;
  }

  .surface-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  h1 {
    font-size: 38px;
    line-height: 1.1;
  }

  h2 {
    font-size: 30px;
    line-height: 1.2;
  }

  .topbar {
    min-height: 60px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .brand {
    font-size: 0;
  }

  .brand-mark {
    font-size: 14px;
  }

  .nav {
    gap: 0;
  }

  .nav a {
    padding: 8px;
    font-size: 13px;
  }

  .nav a:nth-child(n + 4):not(.nav__icon) {
    display: none;
  }

  .showcase-shell {
    padding-top: 40px;
  }

  .home-hero {
    width: min(calc(100% - (2 * var(--gutter))), var(--page));
    gap: 44px;
    padding: 48px 0 56px;
  }

  .home-tagline {
    font-size: 22px;
  }

  .product-frame__bar {
    grid-template-columns: 1fr auto;
  }

  .product-frame__bar > :nth-child(2) {
    display: none;
  }

  .product-frame__body {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .product-frame__rail {
    overflow-x: auto;
    flex-direction: row;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .product-frame__rail span {
    min-width: max-content;
  }

  .product-frame__main {
    padding: 18px;
  }

  .message-intake strong {
    font-size: 20px;
  }

  .contract-grid,
  .capability-band,
  .install-panel,
  .docs-two-column,
  .feature-section--split,
  .feature-hero--imagegen,
  .feature-hero--loop {
    grid-template-columns: minmax(0, 1fr);
  }

  .capability-band--reverse .capability-band__copy,
  .capability-band--reverse .capability-band__specimen {
    order: initial;
  }

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

  .proof-rail > div + div {
    border-left: 0;
  }

  .proof-rail > div:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .proof-rail > div:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .family-nav {
    grid-template-columns: 1fr 1fr;
  }

  .family-nav a:nth-child(odd) {
    border-left: 0;
  }

  .family-nav a:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .section-heading--split {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .route-list > div,
  .impact-list > div,
  .provider-list > div,
  .memory-list > div {
    grid-template-columns: 100px minmax(0, 1fr);
  }

  .route-list > div > :last-child,
  .impact-list > div > :last-child,
  .provider-list > div > :last-child,
  .memory-list > div > :last-child {
    grid-column: 2;
  }

  .handoff-flow,
  .lifecycle-strip,
  .feature-flow {
    grid-template-columns: 1fr 1fr;
  }

  .handoff-flow > div + div,
  .lifecycle-step + .lifecycle-step,
  .feature-flow span + span {
    border-left: 0;
  }

  .handoff-flow > div:nth-child(even),
  .lifecycle-step:nth-child(even),
  .feature-flow span:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .handoff-flow > div:nth-child(n + 3),
  .lifecycle-step:nth-child(n + 3),
  .feature-flow span:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .reference-grid,
  .docs-grid,
  .usecase-grid,
  .image-format-grid,
  .docs-start-grid,
  .docs-lane-map {
    grid-template-columns: 1fr;
  }

  .impact-callout {
    grid-template-columns: 1fr;
  }

  .workbench-section {
    padding: 40px 0;
  }

  .docs-shell {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0 0 72px;
  }

  .docs-toc--desktop {
    display: none;
  }

  .docs-toc--mobile {
    position: static;
    width: 100%;
    min-width: 0;
    max-width: 100vw;
    display: grid;
    overflow-x: auto;
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    padding: 12px var(--gutter);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .docs-content {
    order: 1;
    padding: 0 var(--gutter);
  }

  .docs-hero,
  .feature-hero,
  .architecture-article-hero {
    padding-top: 40px;
  }

  .docs-hero h1,
  .feature-hero h1,
  .architecture-article-hero h1 {
    font-size: 34px;
    line-height: 1.16;
  }

  .docs-value-rail {
    grid-template-columns: 1fr;
  }

  .docs-value-rail article:nth-child(even) {
    border-left: 0;
  }

  .feature-shell,
  .architecture-post-shell {
    padding-top: 20px;
  }

  .architecture-mermaid-map {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
  }
}

@media (max-width: 760px) {
  .comparison-shell {
    width: min(calc(100% - (2 * var(--gutter))), var(--page));
    padding: 40px 0 64px;
  }

  .comparison-hero,
  .orchestration-frame__body,
  .comparison-evidence {
    grid-template-columns: 1fr;
  }

  .comparison-hero {
    gap: 24px;
    padding-bottom: 32px;
  }

  .comparison-hero h1 {
    font-size: 38px;
  }

  .baseline-brief__cards,
  .baseline-wall,
  .lane-rail {
    grid-template-columns: 1fr;
  }

  .baseline-wall article {
    min-height: 0;
  }

  .orchestration-intent,
  .orchestration-direction {
    padding: 24px;
  }

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

  .orchestration-frame__bar {
    align-items: flex-start;
    flex-direction: column;
  }

  .lane-rail li {
    min-height: 0;
  }

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

  .comparison-evidence {
    gap: 24px;
    padding: 40px 0;
  }

  .comparison-boundary,
  .comparison-boundary--applied {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .comparison-boundary--applied .button-row {
    grid-column: auto;
  }
}

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

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