@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/space-grotesk-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/space-grotesk-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/jetbrains-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --ink: #eaf4ff;
  --muted: #94abc1;
  --quiet: #6f879f;
  --surface: #0b1829;
  --surface-2: #0e2034;
  --surface-3: #122943;
  --line: #203a54;
  --line-strong: #315a78;
  --cyan: #70e7ff;
  --cyan-2: #27bfe7;
  --green: #82f3c1;
  --amber: #ffc777;
  --red: #ff9d9d;
  --navy: #06101d;
  --paper: #f5f9fd;
  --paper-ink: #10253b;
  --paper-muted: #60778e;
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 30px;
  --shadow: 0 26px 80px rgba(0, 0, 0, .28);
  --max: 1180px;
  font-family: "Space Grotesk", "Noto Sans TC", "Microsoft JhengHei", "Segoe UI", sans-serif;
  background: var(--navy);
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 72% 2%, rgba(35, 142, 255, .18), transparent 30rem),
    linear-gradient(165deg, #06101d 0%, #081627 36%, #071320 100%);
  color: var(--ink);
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image:
    linear-gradient(rgba(112, 231, 255, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(112, 231, 255, .06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
  z-index: -1;
}

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

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

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

button {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  color: #06101d;
  background: var(--cyan);
  transform: translateY(-160%);
  transition: transform .2s ease;
}

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

.shell {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 16, 29, .84);
  border-bottom: 1px solid rgba(87, 132, 169, .18);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: -.025em;
  white-space: nowrap;
}

.brand img {
  width: 34px;
  height: 34px;
}

.brand small {
  display: block;
  margin-top: 1px;
  color: var(--quiet);
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 25px;
  color: #a8bed1;
  font-size: 14px;
}

.desktop-nav a {
  padding: 10px 0;
  transition: color .2s ease;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  color: white;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-link {
  color: #a8bed1;
  font-size: 13px;
  padding: 8px 10px;
}

.mobile-menu {
  display: none;
  position: relative;
}

.mobile-menu summary {
  cursor: pointer;
  list-style: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-menu summary::before {
  content: "≡";
  font-size: 25px;
  line-height: 1;
}

.mobile-menu[open] summary::before {
  content: "×";
}

.mobile-panel {
  position: absolute;
  right: 0;
  top: 54px;
  width: min(280px, calc(100vw - 36px));
  display: grid;
  padding: 14px;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: #091828;
  box-shadow: var(--shadow);
}

.mobile-panel a {
  padding: 13px 12px;
  border-radius: 10px;
  color: #bed0df;
}

.mobile-panel a:hover {
  background: var(--surface-2);
  color: white;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.01em;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

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

.button-primary {
  color: #05111e;
  background: var(--cyan);
}

.button-primary:hover {
  background: #9af0ff;
}

.button-secondary {
  color: #e8f4ff;
  background: rgba(16, 40, 63, .7);
  border-color: #345673;
}

.button-secondary:hover {
  border-color: var(--cyan);
}

.button-compact {
  min-height: 40px;
  padding-inline: 16px;
}

.eyebrow {
  margin: 0;
  color: var(--cyan);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid rgba(112, 231, 255, .24);
  border-radius: 999px;
  color: #cdefff;
  background: rgba(16, 47, 72, .62);
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: .06em;
}

.status-chip::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 16px rgba(255, 199, 119, .8);
}

.hero {
  position: relative;
  padding: 92px 0 84px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(480px, .9fr);
  gap: 66px;
  align-items: center;
}

.hero h1 {
  max-width: 760px;
  margin: 20px 0 22px;
  font-size: clamp(52px, 6.1vw, 84px);
  line-height: .99;
  letter-spacing: -.062em;
}

.hero .eyebrow {
  margin-top: 24px;
}

.hero h1 em {
  display: block;
  color: #7ae6ff;
  font-style: normal;
}

.hero-lead {
  max-width: 670px;
  margin: 0;
  color: #abc0d2;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.7;
}

.hero-boundary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 20px 0 0;
  padding: 9px 12px;
  border: 1px solid rgba(255, 199, 119, .34);
  border-radius: 10px;
  color: #f1d5a8;
  background: rgba(103, 69, 21, .2);
  font-size: 12px;
  line-height: 1.45;
}

.hero-boundary::before {
  content: "○";
  color: var(--amber);
  font-family: "JetBrains Mono", monospace;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
}

.hero-proof li {
  min-width: 120px;
}

.hero-proof strong {
  display: block;
  margin-bottom: 5px;
  color: #f6fbff;
  font-size: 21px;
}

.hero-proof span {
  display: block;
  max-width: 150px;
  color: #91a8bd;
  font-size: 12.5px;
  line-height: 1.45;
}

.hero-note {
  margin-top: 24px;
  color: #718aa1;
  font-size: 12px;
  line-height: 1.55;
}

.trace-console {
  overflow: hidden;
  border: 1px solid #294860;
  border-radius: var(--radius-lg);
  background: rgba(8, 22, 37, .94);
  box-shadow: 0 35px 100px rgba(0, 0, 0, .38);
}

.trace-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  color: #829ab0;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: .04em;
}

.simulation {
  color: var(--green);
}

.simulation::before {
  content: "●";
  margin-right: 7px;
}

.scenario-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 18px 18px 4px;
}

.scenario-tab {
  min-height: 42px;
  padding: 8px;
  border: 1px solid #203b55;
  border-radius: 11px;
  color: #8ea7bd;
  background: #0a1a2b;
  cursor: pointer;
  font-size: 12px;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}

.scenario-tab:hover {
  color: white;
  border-color: #406784;
}

.scenario-tab[aria-pressed="true"] {
  color: #e8faff;
  border-color: var(--cyan-2);
  background: #102d44;
}

.caller-line {
  margin: 14px 18px 0;
  padding: 14px 15px;
  border-left: 3px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  background: #0d1f33;
  color: #dceaf6;
  font-size: 13px;
  line-height: 1.55;
}

.caller-line span {
  display: block;
  margin-bottom: 5px;
  color: #6f8aa2;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: .08em;
}

.trace-list {
  display: grid;
  gap: 10px;
  padding: 14px 18px 18px;
}

.trace-row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 13px;
  align-items: center;
  min-height: 72px;
  padding: 12px 14px;
  border: 1px solid #1b344b;
  border-radius: 14px;
  background: #0c1b2d;
}

.trace-number {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: var(--cyan);
  background: #122a43;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

.trace-copy strong {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
}

.trace-copy span {
  display: block;
  color: #7790a6;
  font-size: 11px;
  line-height: 1.4;
}

.trace-state {
  color: var(--green);
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: .08em;
}

.trace-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 20px;
  border-top: 1px solid var(--line);
  color: #71899f;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
}

.section {
  padding: 102px 0;
}

.section:not(.section-light) + .section:not(.section-light) {
  padding-top: 28px;
}

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

.section-kicker {
  margin: 0 0 15px;
  color: var(--cyan-2);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.section-title {
  max-width: 850px;
  margin: 0;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: -.045em;
}

.section-lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.section-light .section-lead {
  color: var(--paper-muted);
}

.state-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 46px;
}

.state-card {
  min-height: 300px;
  padding: 28px;
  border: 1px solid #28445e;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #0d1e31, #091827);
}

.state-card:nth-child(2) {
  border-color: #26728d;
}

.state-card:nth-child(3) {
  border-color: #426076;
}

.card-index {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid #31546f;
  border-radius: 50%;
  color: var(--cyan);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
}

.state-card h3 {
  margin: 52px 0 12px;
  font-size: 25px;
  letter-spacing: -.03em;
}

.state-card p {
  margin: 0;
  color: #8fa7bb;
  line-height: 1.65;
}

.state-card footer {
  margin-top: 24px;
  color: #5f7d95;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
}

.workflow {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 64px;
  align-items: start;
  margin-top: 50px;
}

.workflow-sticky {
  position: sticky;
  top: 110px;
}

.workflow-sticky img {
  width: 100%;
  border-radius: 22px;
  border: 1px solid #d3e1ed;
  box-shadow: 0 26px 70px rgba(34, 72, 107, .14);
}

.workflow-list {
  display: grid;
  gap: 12px;
}

.workflow-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  padding: 22px;
  border: 1px solid #d9e4ee;
  border-radius: 16px;
  background: white;
}

.workflow-step b {
  color: #178cad;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

.workflow-step h3 {
  margin: 0 0 7px;
  font-size: 20px;
}

.workflow-step p {
  margin: 0;
  color: var(--paper-muted);
  line-height: 1.55;
}

.human-panel {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  overflow: hidden;
  border: 1px solid #294760;
  border-radius: var(--radius-lg);
  background: #0a1a2a;
}

.human-image {
  min-height: 560px;
  position: relative;
  overflow: hidden;
}

.human-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.human-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 60%, #0a1a2a);
}

.human-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 52px 50px 52px 28px;
}

.human-copy h2 {
  margin: 15px 0 18px;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.05;
  letter-spacing: -.045em;
}

.human-copy > p:not(.eyebrow) {
  color: #91a9bd;
  line-height: 1.7;
}

.plain-list {
  display: grid;
  gap: 12px;
  margin: 25px 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  position: relative;
  padding-left: 24px;
  color: #bfd0df;
  line-height: 1.5;
}

.plain-list li::before {
  content: "↳";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

.autonomy-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 42px;
}

.autonomy-card {
  min-height: 200px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface);
}

.autonomy-card:nth-child(-n+2) {
  border-color: #35627d;
}

.autonomy-card small {
  color: var(--cyan);
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
}

.autonomy-card h3 {
  margin: 28px 0 10px;
  font-size: 16px;
}

.autonomy-card p {
  margin: 0;
  color: #7891a8;
  font-size: 13px;
  line-height: 1.5;
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 42px;
}

.use-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 26px;
  border: 1px solid #d8e4ee;
  border-radius: 18px;
  background: white;
}

.use-icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: #0a7696;
  background: #e9f7fb;
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
}

.use-card h3 {
  margin: 2px 0 8px;
  font-size: 21px;
}

.use-card p {
  margin: 0;
  color: var(--paper-muted);
  line-height: 1.55;
}

.evidence-layout {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 64px;
  margin-top: 46px;
}

.evidence-summary {
  padding: 30px;
  border: 1px solid #2e526d;
  border-radius: 20px;
  background: linear-gradient(150deg, #0f263b, #091827);
}

.evidence-summary strong {
  display: block;
  font-size: 42px;
  letter-spacing: -.05em;
}

.evidence-summary p {
  color: #8fa8bc;
  line-height: 1.6;
}

.evidence-summary a {
  color: var(--cyan);
  font-weight: 700;
}

.evidence-table {
  display: grid;
  gap: 10px;
}

.evidence-row {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 18px;
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(10, 27, 44, .7);
}

.evidence-label {
  align-self: start;
  color: var(--green);
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.evidence-label.validating {
  color: var(--amber);
}

.evidence-label.unmeasured {
  color: #92a6b9;
}

.evidence-row p {
  margin: 0;
  color: #aec0d0;
  line-height: 1.5;
}

.site-cta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 46px;
  border: 1px solid #2b526e;
  border-radius: 25px;
  background:
    radial-gradient(circle at 100% 0, rgba(44, 190, 234, .25), transparent 38%),
    #0b1d30;
}

.site-cta h2 {
  margin: 0 0 12px;
  font-size: clamp(31px, 4vw, 50px);
  letter-spacing: -.04em;
}

.site-cta p {
  max-width: 700px;
  margin: 0;
  color: #94aabd;
  line-height: 1.6;
}

.site-cta .hero-actions {
  margin: 0;
}

.site-footer {
  padding: 56px 0 30px;
  border-top: 1px solid #182e43;
  background: #050d17;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 42px;
}

.footer-brand p {
  max-width: 380px;
  color: #7891a7;
  line-height: 1.6;
}

.footer-column h3 {
  margin: 0 0 15px;
  color: #d8e7f4;
  font-size: 13px;
}

.footer-column a {
  display: block;
  margin: 9px 0;
  color: #7891a7;
  font-size: 13px;
}

.footer-column a:hover {
  color: white;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid #14273a;
  color: #587087;
  font-size: 11px;
}

.subpage-hero {
  padding: 86px 0 60px;
}

.subpage-hero h1 {
  max-width: 900px;
  margin: 18px 0 20px;
  font-size: clamp(46px, 6vw, 76px);
  line-height: 1;
  letter-spacing: -.055em;
}

.subpage-hero p:last-child {
  max-width: 760px;
  color: #9bb1c5;
  font-size: 19px;
  line-height: 1.7;
}

.status-banner {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-top: 28px;
  padding: 18px 20px;
  border: 1px solid #5e4a29;
  border-radius: 14px;
  color: #f4d7a6;
  background: rgba(97, 66, 20, .25);
}

.status-banner strong {
  white-space: nowrap;
}

.prose-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 70px;
  padding: 30px 0 100px;
}

.toc {
  position: sticky;
  top: 110px;
  align-self: start;
  display: grid;
  gap: 7px;
}

.toc a {
  padding: 10px 12px;
  border-left: 2px solid #24435d;
  color: #7891a8;
  font-size: 13px;
}

.toc a:hover {
  color: white;
  border-left-color: var(--cyan);
}

.prose {
  min-width: 0;
}

.prose section {
  scroll-margin-top: 110px;
  margin-bottom: 68px;
}

.prose h2 {
  margin: 0 0 20px;
  font-size: clamp(30px, 3.5vw, 46px);
  letter-spacing: -.035em;
}

.prose h3 {
  margin: 30px 0 12px;
  font-size: 21px;
}

.prose p,
.prose li {
  color: #a7bbcd;
  line-height: 1.75;
}

.prose a {
  color: var(--cyan);
}

.prose code {
  padding: 2px 6px;
  border-radius: 5px;
  color: #b7effa;
  background: #10263b;
  font-family: "JetBrains Mono", monospace;
  font-size: .9em;
}

.prose-card {
  margin: 20px 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface);
}

.prose-card h3 {
  margin-top: 0;
}

.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 14px 16px 14px 45px;
  position: relative;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0a1929;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 17px;
  color: var(--green);
  font-weight: 700;
}

.check-list.pending li::before {
  content: "→";
  color: var(--amber);
}

.check-list.unmeasured li::before {
  content: "—";
  color: #8ea1b3;
}

.not-found {
  min-height: 80vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 40px;
}

.not-found strong {
  display: block;
  color: var(--cyan);
  font-family: "JetBrains Mono", monospace;
  font-size: 90px;
}

.not-found h1 {
  margin: 15px 0;
  font-size: 42px;
}

.not-found p {
  color: var(--muted);
}

.not-found .hero-actions {
  justify-content: center;
}

@media (max-width: 1000px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .trace-console {
    max-width: 700px;
  }

  .autonomy-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .human-panel {
    grid-template-columns: 1fr;
  }

  .human-image {
    min-height: 420px;
  }

  .human-image::after {
    background: linear-gradient(0deg, #0a1a2a, transparent 45%);
  }

  .human-copy {
    padding: 42px;
  }

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

  .workflow-sticky {
    position: static;
  }

  .evidence-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 820px) {
  .desktop-nav,
  .nav-actions .button {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .state-grid,
  .use-grid {
    grid-template-columns: 1fr;
  }

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

  .site-cta {
    grid-template-columns: 1fr;
    padding: 32px;
  }

  .site-cta .hero-actions {
    margin-top: 5px;
  }

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

  .prose-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 8px;
  }

  .toc {
    position: static;
    grid-template-columns: repeat(2, 1fr);
  }

  .subpage-hero {
    padding-bottom: 34px;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 28px, var(--max));
  }

  .nav {
    min-height: 66px;
  }

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

  .language-link {
    display: none;
  }

  .hero {
    padding: 62px 0 64px;
  }

  .hero h1 {
    font-size: clamp(40px, 13vw, 56px);
  }

  .hero-proof {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .scenario-tabs {
    grid-template-columns: 1fr;
  }

  .trace-row {
    grid-template-columns: 36px 1fr;
  }

  .trace-number {
    width: 36px;
    height: 36px;
  }

  .trace-state {
    grid-column: 2;
  }

  .trace-foot {
    display: grid;
  }

  .section {
    padding: 76px 0;
  }

  .state-card {
    min-height: 250px;
  }

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

  .use-card {
    grid-template-columns: 48px 1fr;
    padding: 20px;
  }

  .use-icon {
    width: 48px;
    height: 48px;
  }

  .human-image {
    min-height: 330px;
  }

  .human-copy {
    padding: 30px 24px 36px;
  }

  .evidence-row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

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

  .footer-bottom {
    display: grid;
  }

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

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}