:root {
  color-scheme: light;
  --canvas: #f3f0e8;
  --paper: #fffdf8;
  --ink: #161916;
  --muted: #686a63;
  --line: #c8c5ba;
  --line-strong: #777a73;
  --signal: #ff5a36;
  --signal-soft: #ffd6cc;
  --acid: #e8ff55;
  --cad: #20272d;
  --cad-line: #00ff29;
  --content: min(1260px, calc(100% - 48px));
  --sans: "Segoe UI Variable", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--canvas);
  color: var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 99;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--paper);
  transform: translateY(-160%);
}

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

.site-header {
  width: var(--content);
  min-height: 74px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid var(--ink);
}

.brand {
  display: inline-flex;
  width: max-content;
  align-items: center;
  gap: 10px;
  font-weight: 850;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--signal);
  box-shadow: 3px 3px 0 var(--ink);
  font-size: 17px;
  font-weight: 950;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font: 760 11px var(--mono);
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  text-decoration: underline;
}

.language-switch {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 5px;
  font: 720 11px var(--mono);
}

.language-switch button {
  appearance: none;
  padding: 4px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}

.language-switch button[aria-pressed="true"] {
  color: var(--ink);
  font-weight: 900;
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 3px;
  text-underline-offset: 5px;
}

main {
  overflow: clip;
}

.hero {
  width: var(--content);
  min-height: min(770px, calc(100vh - 74px));
  margin: 0 auto;
  padding: 68px 0 76px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.72fr);
  align-items: center;
  gap: clamp(44px, 7vw, 100px);
}

.hero-copy,
.proof-index {
  animation: enter-up 520ms cubic-bezier(0.2, 0.75, 0.25, 1) both;
}

.proof-index {
  animation-delay: 90ms;
}

.eyebrow,
.section-kicker {
  margin: 0;
  font: 900 10px var(--mono);
  letter-spacing: 0.11em;
}

.eyebrow::before,
.section-kicker::before {
  content: "";
  display: inline-block;
  width: 25px;
  height: 8px;
  margin-right: 10px;
  border: 1px solid currentColor;
  border-radius: 2px;
  background: var(--signal);
}

.hero h1 {
  max-width: 820px;
  margin: 18px 0 24px;
  font-size: clamp(46px, 5.45vw, 72px);
  font-weight: 950;
  line-height: 0.94;
  letter-spacing: -0.065em;
}

.hero-deck {
  max-width: 770px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.25vw, 18px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 850;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

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

.button-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 5px 5px 0 var(--signal);
}

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

.claim-note {
  max-width: 760px;
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--signal);
  color: var(--muted);
  font: 700 11px/1.55 var(--mono);
}

.proof-index {
  min-width: 0;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 8px 8px 0 var(--signal);
  overflow: hidden;
}

.focus-stamp {
  padding: 28px;
  display: grid;
  gap: 5px;
  background: var(--ink);
  color: var(--paper);
}

.focus-stamp span,
.focus-stamp small {
  font: 820 9px var(--mono);
  letter-spacing: 0.09em;
}

.focus-stamp span {
  color: var(--acid);
}

.focus-stamp strong {
  overflow-wrap: anywhere;
  font: 900 clamp(23px, 2.4vw, 34px)/1 var(--mono);
  letter-spacing: -0.055em;
}

.focus-stamp small {
  color: #bfc4bf;
}

.proof-index ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.proof-index li {
  min-width: 0;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 13px;
  padding: 20px 22px;
  border-top: 1px solid var(--line);
}

.chain-number {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 5px;
  background: var(--signal-soft);
  font: 900 9px var(--mono);
}

.proof-index li div {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.proof-index li strong {
  font-size: 13px;
  line-height: 1.2;
}

.proof-index li small {
  color: var(--muted);
  font: 700 9px var(--mono);
  overflow-wrap: anywhere;
}

.proof-index li b {
  color: #236b2c;
  font: 900 9px var(--mono);
}

.section {
  width: var(--content);
  margin: 0 auto;
  padding: 96px 0;
  border-top: 1px solid var(--ink);
}

.section-heading {
  max-width: 960px;
}

.section-heading h2,
.identity-section h2 {
  margin: 15px 0 0;
  font-size: clamp(38px, 4.7vw, 64px);
  font-weight: 950;
  line-height: 0.97;
  letter-spacing: -0.062em;
}

.section-heading > p:last-child,
.section-heading-split > p,
.identity-section > div > p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.section-heading-split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.7fr);
  align-items: end;
  gap: clamp(42px, 7vw, 100px);
}

.section-heading-split > p {
  margin: 0;
}

.md-cad-grid {
  margin-top: 42px;
  display: grid;
  grid-template-columns: minmax(320px, 0.7fr) minmax(0, 1.3fr);
  align-items: stretch;
  gap: 18px;
}

.markdown-card,
.source-readback {
  min-width: 0;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.panel-label {
  min-height: 38px;
  margin: 0;
  padding: 9px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid #4b504d;
  background: var(--ink);
  color: var(--paper);
  font: 850 9px var(--mono);
  letter-spacing: 0.06em;
}

.panel-label span:first-child {
  color: var(--acid);
}

.markdown-card pre {
  margin: 0;
  padding: clamp(24px, 3vw, 42px) clamp(20px, 3vw, 34px);
  overflow-x: auto;
  border-bottom: 1px solid #4b504d;
  color: #f9faf7;
  font: 760 clamp(12px, 1.12vw, 15px)/1.9 var(--mono);
}

.token-key {
  color: var(--acid);
}

.compact-ledger,
.source-readback dl {
  margin: 0;
  padding: 16px 26px 24px;
}

.compact-ledger div,
.source-readback dl div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid #4b504d;
}

.compact-ledger dt,
.source-readback dt {
  color: #aeb5af;
  font: 730 9px var(--mono);
}

.compact-ledger dd,
.source-readback dd {
  min-width: 0;
  margin: 0;
  text-align: right;
  overflow-wrap: anywhere;
  font: 800 10px var(--mono);
}

.cad-frame {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}

.cad-frame img {
  width: 100%;
  background: var(--paper);
}

.cad-frame figcaption {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

.cad-frame-light img {
  aspect-ratio: 1.8;
  object-fit: contain;
}

.cad-frame-dark {
  border-color: #545b5f;
  background: var(--cad);
  color: #f6f8f6;
}

.cad-frame-dark img {
  background: var(--cad);
}

.cad-frame-dark figcaption {
  border-top-color: #4b5256;
  color: #bfc5c2;
}

.evidence-contract {
  margin: 18px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}

.evidence-contract div {
  min-width: 0;
  padding: 20px;
  border-right: 1px solid var(--line);
}

.evidence-contract div:last-child {
  border-right: 0;
}

.evidence-contract dt {
  color: var(--signal);
  font: 900 9px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.evidence-contract dd {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.dark-section {
  position: relative;
  width: 100%;
  max-width: none;
  padding-right: max(24px, calc((100vw - 1260px) / 2));
  padding-left: max(24px, calc((100vw - 1260px) / 2));
  background: var(--ink);
  color: var(--paper);
  border-top: 0;
}

.dark-section .section-heading > p:last-child {
  color: #bfc3bd;
}

.dark-section .section-kicker::before {
  background: var(--acid);
}

.three-d-grid {
  margin-top: 42px;
  display: grid;
  grid-template-columns: minmax(300px, 0.62fr) minmax(0, 1.38fr);
  align-items: stretch;
  gap: 18px;
}

.source-readback {
  border-color: #535853;
  background: #262a27;
}

.geometry-glyph {
  position: relative;
  min-height: 174px;
  margin: 26px 26px 2px;
  display: grid;
  place-items: center;
  border: 1px solid #59605b;
  background: #1b1e1c;
  overflow: hidden;
}

.geometry-glyph span {
  position: relative;
  z-index: 2;
  display: grid;
  width: 118px;
  height: 88px;
  place-items: center;
  border: 2px solid var(--cad-line);
  color: var(--cad-line);
  font: 900 24px var(--mono);
}

.geometry-glyph i,
.geometry-glyph i::before {
  position: absolute;
  content: "";
  background: #59605b;
}

.geometry-glyph i {
  width: 100%;
  height: 1px;
}

.geometry-glyph i::before {
  width: 1px;
  height: 174px;
  left: 50%;
  top: -87px;
}

.bridge-note {
  margin: 0 26px 26px;
  padding: 14px;
  border-left: 3px solid var(--acid);
  background: #1b1e1c;
  color: #bdc4be;
  font-size: 11px;
}

.metric-strip {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid #545954;
  border-radius: var(--radius);
  overflow: hidden;
}

.metric-strip div {
  min-width: 0;
  padding: 19px;
  display: grid;
  gap: 8px;
  border-right: 1px solid #545954;
  background: #262a27;
}

.metric-strip div:last-child {
  border-right: 0;
}

.metric-strip span {
  color: #adb4ae;
  font: 740 9px var(--mono);
}

.metric-strip strong {
  overflow-wrap: anywhere;
  color: var(--acid);
  font: 850 12px var(--mono);
}

.evidence-contract-dark {
  border-color: #545954;
  background: #262a27;
}

.evidence-contract-dark div {
  border-right-color: #545954;
}

.evidence-contract-dark dt {
  color: var(--acid);
}

.evidence-contract-dark dd {
  color: #bdc4be;
}

.interaction-sequence {
  margin-top: 42px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 150px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
}

.interaction-sequence .cad-frame img {
  aspect-ratio: 1180 / 744;
  object-fit: contain;
}

.action-marker {
  position: relative;
  min-height: 154px;
  padding: 20px 14px;
  display: grid;
  place-content: center;
  gap: 6px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--signal);
  color: var(--ink);
  text-align: center;
}

.action-marker::before,
.action-marker::after {
  position: absolute;
  top: 50%;
  width: 16px;
  height: 1px;
  content: "";
  background: var(--ink);
}

.action-marker::before {
  left: -17px;
}

.action-marker::after {
  right: -17px;
}

.action-marker span,
.action-marker small {
  font: 850 8px var(--mono);
  letter-spacing: 0.06em;
}

.action-marker strong {
  font: 950 15px/1.05 var(--mono);
}

.readback-table {
  margin-top: 18px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}

.readback-table > div {
  min-width: 0;
  display: grid;
  grid-template-columns: 0.65fr 1fr 1fr 1.15fr;
  border-top: 1px solid var(--line);
}

.readback-table > div:first-child {
  border-top: 0;
}

.readback-table span,
.readback-table strong {
  min-width: 0;
  padding: 13px 16px;
  border-right: 1px solid var(--line);
  overflow-wrap: anywhere;
  font: 760 10px var(--mono);
}

.readback-table span:last-child {
  border-right: 0;
}

.readback-head {
  background: var(--ink);
  color: var(--paper);
}

.readback-head span {
  border-right-color: #4c514e;
  color: #bfc5bf;
  font-size: 9px;
  letter-spacing: 0.07em;
}

.readback-delta {
  background: var(--signal-soft);
}

.readback-delta span,
.readback-delta strong {
  font-weight: 900;
}

.privacy-section {
  border-top-color: var(--ink);
}

.privacy-ledger,
.reuse-ledger {
  margin-top: 42px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.privacy-ledger article,
.reuse-ledger article {
  min-width: 0;
  padding: 25px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
}

.privacy-ledger article > span,
.reuse-ledger article > span {
  color: var(--signal);
  font: 900 9px var(--mono);
  letter-spacing: 0.08em;
}

.privacy-ledger h3,
.reuse-ledger h3 {
  margin: 15px 0 0;
  font-size: 23px;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.privacy-ledger ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 12px;
}

.privacy-ledger li + li {
  margin-top: 9px;
}

.privacy-ledger p,
.reuse-ledger p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.privacy-allowed {
  border-color: var(--ink) !important;
  box-shadow: 6px 6px 0 var(--acid);
}

.reuse-section {
  border-top-color: var(--ink);
}

.reuse-ledger article {
  display: flex;
  min-height: 280px;
  flex-direction: column;
}

.reuse-ledger article:first-child {
  border-color: var(--ink);
  box-shadow: 6px 6px 0 var(--signal);
}

.reuse-ledger a {
  width: max-content;
  max-width: 100%;
  margin-top: auto;
  padding-top: 20px;
  overflow-wrap: anywhere;
  font: 800 11px var(--mono);
}

.identity-section {
  width: 100%;
  padding: 88px max(24px, calc((100vw - 1260px) / 2));
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.74fr);
  align-items: center;
  gap: clamp(44px, 8vw, 110px);
  background: var(--signal);
  color: var(--ink);
}

.identity-section > div > p {
  color: #532117;
}

.manifest-link {
  display: inline-flex;
  margin-top: 24px;
  padding: 12px 15px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--paper);
  font: 850 11px var(--mono);
  text-decoration: none;
}

.identity-ledger {
  margin: 0;
  padding: 20px 26px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
  box-shadow: 7px 7px 0 var(--paper);
}

.identity-ledger div {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(110px, 0.64fr) minmax(0, 1.36fr);
  gap: 16px;
  padding: 13px 0;
  border-top: 1px solid #4e534f;
}

.identity-ledger div:first-child {
  border-top: 0;
}

.identity-ledger dt {
  color: #b9bfb9;
  font: 730 9px var(--mono);
}

.identity-ledger dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  text-align: right;
  font: 820 10px/1.5 var(--mono);
}

.site-footer {
  width: var(--content);
  min-height: 108px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-top: 1px solid var(--ink);
}

.site-footer p {
  margin: 0;
  display: grid;
  gap: 3px;
  font-size: 11px;
}

.site-footer p span {
  color: var(--muted);
}

.site-footer div {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 20px;
  font: 780 10px var(--mono);
}

@keyframes enter-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: 44px;
  }

  .proof-index {
    max-width: 760px;
  }

  .md-cad-grid,
  .three-d-grid {
    grid-template-columns: 1fr;
  }

  .interaction-sequence {
    grid-template-columns: 1fr;
  }

  .action-marker {
    min-height: 104px;
  }

  .action-marker::before,
  .action-marker::after {
    display: none;
  }

  .evidence-contract,
  .metric-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .evidence-contract div:nth-child(2),
  .metric-strip div:nth-child(2) {
    border-right: 0;
  }

  .evidence-contract div:nth-child(n + 3),
  .metric-strip div:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .evidence-contract-dark div:nth-child(n + 3),
  .dark-section .metric-strip div:nth-child(n + 3) {
    border-top-color: #545954;
  }

  .identity-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  :root {
    --content: min(100% - 28px, 1260px);
  }

  .site-header {
    min-height: 66px;
  }

  .brand {
    font-size: 13px;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
    box-shadow: 2px 2px 0 var(--ink);
  }

  .hero {
    padding: 54px 0 64px;
  }

  .hero h1 {
    font-size: clamp(42px, 13vw, 58px);
  }

  .section {
    padding: 70px 0;
  }

  .dark-section {
    padding-right: 14px;
    padding-left: 14px;
  }

  .section-heading h2,
  .identity-section h2 {
    font-size: clamp(36px, 11vw, 52px);
  }

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

  .proof-index li {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .proof-index li b {
    grid-column: 2;
  }

  .focus-stamp {
    padding: 24px 20px;
  }

  .md-cad-grid,
  .three-d-grid,
  .interaction-sequence {
    margin-top: 30px;
  }

  .markdown-card pre {
    font-size: 11px;
  }

  .compact-ledger div,
  .source-readback dl div {
    grid-template-columns: 90px minmax(0, 1fr);
  }

  .cad-frame figcaption {
    font-size: 10px;
  }

  .evidence-contract,
  .metric-strip,
  .privacy-ledger,
  .reuse-ledger {
    grid-template-columns: 1fr;
  }

  .evidence-contract div,
  .metric-strip div {
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .evidence-contract div:first-child,
  .metric-strip div:first-child {
    border-top: 0;
  }

  .evidence-contract-dark div,
  .dark-section .metric-strip div {
    border-top-color: #545954;
  }

  .readback-table {
    overflow: hidden;
  }

  .readback-table > div {
    min-width: 0;
    grid-template-columns: 1fr;
  }

  .readback-table span,
  .readback-table strong {
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .readback-table > div > :first-child {
    border-top: 0;
  }

  .readback-head {
    display: none !important;
  }

  .identity-section {
    padding: 72px 14px;
  }

  .identity-ledger {
    padding: 15px 18px;
  }

  .identity-ledger div {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .identity-ledger dd {
    text-align: left;
  }

  .site-footer {
    padding: 28px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer div {
    justify-content: flex-start;
  }
}

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

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