:root {
  --paper: #f7f6f1;
  --paper-deep: #efeee7;
  --surface: #fcfbf7;
  --ink: #171916;
  --muted: #656960;
  --quiet: #747970;
  --rule: #cdcec6;
  --rule-dark: #aeb0a8;
  --verified: #0b5f43;
  --verified-soft: #dcefe6;
  --control-radius: 10px;
  --content-width: 1280px;
  color: var(--ink);
  background: var(--paper);
  font-family:
    "Pretendard Variable",
    Pretendard,
    -apple-system,
    BlinkMacSystemFont,
    system-ui,
    sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
}

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

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 12px 16px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-180%);
}

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

.site-header,
.site-footer {
  width: min(100%, var(--content-width));
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  min-height: 72px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid var(--rule);
  background: rgb(247 246 241 / 96%);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 760;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark span:first-child {
  padding-right: 10px;
  border-right: 1px solid var(--ink);
}

.wordmark span:last-child {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.site-menu {
  display: flex;
  justify-content: center;
  gap: clamp(20px, 2.5vw, 36px);
}

.site-menu a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 630;
  text-decoration: none;
  transition: color 160ms ease;
}

.site-menu a:hover {
  color: var(--ink);
}

.menu-toggle {
  display: none;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding-inline: 14px;
  border: 1px solid var(--rule);
  border-radius: var(--control-radius);
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  font-weight: 650;
  line-height: 1;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: var(--control-radius);
  font-weight: 690;
  text-decoration: none;
  transition:
    color 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    translate 160ms ease;
}

.button-primary {
  color: #fff;
  border-color: var(--verified);
  background: var(--verified);
}

.button-primary:hover {
  border-color: #064b34;
  background: #064b34;
  translate: 0 -2px;
}

.button-secondary {
  border-color: transparent;
  background: transparent;
  text-decoration: underline;
  text-decoration-color: var(--rule-dark);
  text-underline-offset: 6px;
}

.button-secondary:hover {
  color: var(--verified);
  text-decoration-color: currentColor;
}

.hero {
  width: min(var(--content-width), calc(100% - 96px));
  min-height: min(820px, calc(100dvh - 72px));
  display: grid;
  grid-template-columns: minmax(540px, 1.05fr) minmax(500px, 0.95fr);
  align-items: center;
  gap: clamp(56px, 6vw, 96px);
  margin-inline: auto;
  padding-block: clamp(88px, 9vw, 136px);
}

.hero-copy {
  min-width: 0;
}

.eyebrow,
.section-index {
  margin: 0;
  color: var(--verified);
  font-size: 13px;
  font-weight: 730;
  letter-spacing: 0.015em;
}

.hero h1 {
  max-width: 680px;
  margin: 20px 0 28px;
  font-size: clamp(58px, 5vw, 76px);
  font-weight: 650;
  line-height: 1.01;
  letter-spacing: -0.055em;
  word-break: keep-all;
}

.hero h1 span,
.final-cta h2 span {
  display: block;
}

.hero h1 span:last-child {
  color: var(--verified);
}

.hero-description {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 1.35vw, 19px);
  line-height: 1.72;
  word-break: keep-all;
}

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

.hero-safety {
  margin: 18px 0 0;
  color: var(--quiet);
  font-size: 0.875rem;
  line-height: 1.6;
}

.proof-ledger,
.flow-progress,
.flow-number,
.flow-step-copy > div > p,
.flow-evidence,
.scope-strip,
.final-cta > p {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.proof-ledger {
  min-width: 0;
  border-block: 1px solid var(--ink);
  background: transparent;
}

.ledger-header,
.ledger-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 20px 2px;
}

.ledger-header > div {
  display: grid;
  gap: 6px;
}

.ledger-header > div span,
.ledger-footer span {
  color: var(--quiet);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.ledger-header > div strong {
  font-size: 13px;
  letter-spacing: 0.02em;
}

.ledger-header p {
  margin: 0;
  color: var(--verified);
  font-size: 11px;
  font-weight: 720;
}

.ledger-table {
  border-top: 1px solid var(--rule);
}

.ledger-row {
  min-height: 64px;
  display: grid;
  grid-template-columns: minmax(78px, 0.55fr) minmax(118px, 1fr) minmax(118px, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 1.5vw, 20px);
  border-bottom: 1px solid var(--rule);
  font-size: 12px;
}

.ledger-row > span {
  color: var(--muted);
  letter-spacing: 0.03em;
}

.ledger-row strong,
.ledger-row em {
  overflow-wrap: anywhere;
}

.ledger-row em {
  color: var(--verified);
  font-style: normal;
  font-weight: 720;
  text-align: right;
}

.ledger-row-head {
  min-height: 42px;
  color: var(--quiet);
  font-size: 10px;
}

.ledger-row-head span:last-child {
  text-align: right;
}

.ledger-rule {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 0;
  padding: 16px 2px;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font-family:
    "Pretendard Variable",
    Pretendard,
    -apple-system,
    BlinkMacSystemFont,
    system-ui,
    sans-serif;
  font-size: 13px;
  line-height: 1.55;
  word-break: keep-all;
}

.ledger-rule span {
  flex: 0 0 auto;
  color: var(--verified);
  font: 720 10px/1 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.05em;
}

.ledger-footer strong {
  overflow-wrap: anywhere;
  color: var(--verified);
  font-size: 12px;
  text-align: right;
}

[data-receipt-hash] {
  overflow-wrap: anywhere;
}

.section,
.final-cta {
  width: min(var(--content-width), calc(100% - 96px));
  margin-inline: auto;
}

.section {
  padding-block: clamp(112px, 11vw, 168px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(180px, 0.28fr) minmax(0, 1.18fr) minmax(280px, 0.54fr);
  align-items: start;
  gap: clamp(36px, 5vw, 72px);
}

.section-heading h2,
.flow-heading h2,
.final-cta h2 {
  margin: -8px 0 0;
  font-size: clamp(42px, 4.4vw, 64px);
  font-weight: 640;
  line-height: 1.08;
  letter-spacing: -0.047em;
  word-break: keep-all;
}

.section-heading > p:last-child {
  max-width: 42ch;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.72;
  word-break: keep-all;
}

.why-section {
  border-top: 1px solid var(--rule);
}

.verification-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: clamp(64px, 7vw, 96px) 0 0;
  padding: 0;
  border-block: 1px solid var(--ink);
  list-style: none;
}

.verification-principles li {
  min-width: 0;
  min-height: 240px;
  display: grid;
  align-content: end;
  gap: 14px;
  padding: clamp(28px, 3vw, 42px);
}

.verification-principles li + li {
  border-left: 1px solid var(--rule);
}

.verification-principles span {
  color: var(--verified);
  font: 720 11px/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.verification-principles strong {
  font-size: clamp(23px, 2vw, 30px);
  letter-spacing: -0.035em;
}

.verification-principles p {
  max-width: 30ch;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
}

.flow-section {
  width: 100%;
  padding-bottom: 0;
}

.flow-heading,
.flow-list {
  width: min(var(--content-width), calc(100% - 96px));
  margin-inline: auto;
}

.flow-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 48px;
  margin-bottom: 56px;
}

.flow-heading h2 {
  max-width: 880px;
  margin-top: 14px;
}

.flow-progress {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 8px;
  color: var(--verified);
  font-size: 11px;
  pointer-events: none;
}

.flow-progress-line {
  width: min(180px, 16vw);
  height: 1px;
  display: block;
  background: var(--rule);
}

.flow-progress-line i {
  width: 25%;
  height: 1px;
  display: block;
  background: var(--verified);
  transition: width 280ms ease;
}

[data-story-stage="execution"] .flow-progress-line i {
  width: 50%;
}

[data-story-stage="matching"] .flow-progress-line i {
  width: 75%;
}

[data-story-stage="receipt"] .flow-progress-line i {
  width: 100%;
}

.flow-list {
  border-top: 1px solid var(--ink);
}

.flow-step {
  min-height: 184px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.42fr);
  align-items: stretch;
  border-bottom: 1px solid var(--rule);
  transition: color 180ms ease;
}

.flow-step-copy {
  min-width: 0;
  display: grid;
  grid-template-columns: 64px minmax(220px, 0.72fr) minmax(260px, 1.28fr);
  align-items: center;
  gap: clamp(24px, 3vw, 48px);
  padding: 34px 44px 34px 0;
}

.flow-number {
  color: var(--quiet);
  font-size: 13px;
}

.flow-step-copy > div > p {
  margin: 0 0 10px;
  color: var(--verified);
  font-size: 10px;
  font-weight: 720;
  letter-spacing: 0.04em;
}

.flow-step-copy h3 {
  margin: 0;
  font-size: clamp(24px, 2.3vw, 34px);
  font-weight: 640;
  line-height: 1.18;
  letter-spacing: -0.038em;
  word-break: keep-all;
}

.flow-step-copy > p {
  max-width: 46ch;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.68;
  word-break: keep-all;
}

.flow-evidence {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  margin: 0;
  border-left: 1px solid var(--rule);
}

.flow-evidence > div {
  min-width: 0;
  display: grid;
  gap: 10px;
  padding: 28px 24px;
}

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

.flow-evidence dt,
.flow-evidence dd {
  margin: 0;
}

.flow-evidence dt {
  color: var(--quiet);
  font-size: 10px;
  letter-spacing: 0.05em;
}

.flow-evidence dd {
  overflow-wrap: anywhere;
  color: var(--verified);
  font-size: 12px;
  font-weight: 720;
}

.flow-step[aria-current="step"] .flow-number,
.flow-step[aria-current="step"] h3 {
  color: var(--verified);
}

.scope-strip {
  width: 100%;
  margin-top: clamp(112px, 11vw, 168px);
  padding: clamp(72px, 8vw, 112px)
    max(48px, calc((100vw - var(--content-width)) / 2));
  color: var(--paper);
  background: var(--ink);
}

.scope-strip-inner {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  align-items: end;
  gap: clamp(56px, 8vw, 120px);
}

.scope-intro > p,
.scope-note {
  margin: 0;
  color: #79caa8;
  font-size: 10px;
  font-weight: 720;
  letter-spacing: 0.05em;
}

.scope-intro h3 {
  max-width: 560px;
  margin: 18px 0 0;
  font-family:
    "Pretendard Variable",
    Pretendard,
    -apple-system,
    BlinkMacSystemFont,
    system-ui,
    sans-serif;
  font-size: clamp(34px, 3.6vw, 52px);
  font-weight: 620;
  line-height: 1.13;
  letter-spacing: -0.045em;
  word-break: keep-all;
}

.scope-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid #464b42;
}

.scope-facts > div {
  min-height: 110px;
  display: grid;
  align-content: end;
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid #464b42;
}

.scope-facts > div:nth-child(odd) {
  padding-right: 30px;
}

.scope-facts > div:nth-child(even) {
  padding-left: 30px;
  border-left: 1px solid #464b42;
}

.scope-facts dt,
.scope-facts dd {
  margin: 0;
}

.scope-facts dt {
  color: #79caa8;
  font-size: 10px;
}

.scope-facts dd {
  overflow-wrap: anywhere;
  color: #e9eee9;
  font-size: 13px;
  font-weight: 700;
}

.scope-note {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid #464b42;
  color: #9da69d;
}

.final-cta {
  padding-block: clamp(120px, 14vw, 196px);
  text-align: center;
  border-top: 1px solid var(--rule);
}

.final-cta > p {
  margin: 0;
  color: var(--verified);
  font-size: 10px;
  font-weight: 720;
  letter-spacing: 0.06em;
}

.final-cta h2 {
  max-width: 900px;
  margin: 20px auto 0;
  font-size: clamp(48px, 5.3vw, 76px);
}

.final-cta h2 span:last-child {
  color: var(--verified);
}

.final-cta .hero-actions {
  justify-content: center;
}

.site-footer {
  min-height: 76px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.045em;
}

html[data-reveal-enhanced="true"] [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 480ms ease,
    transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-reveal-enhanced="true"] [data-reveal][data-visible="true"] {
  opacity: 1;
  transform: none;
}

@media (max-width: 1180px) {
  .site-header {
    grid-template-columns: 1fr auto auto;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-menu {
    position: absolute;
    inset: 72px 0 auto;
    display: none;
    justify-content: start;
    padding: 24px clamp(20px, 4vw, 48px);
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
  }

  .site-menu[data-open="true"] {
    display: grid;
    gap: 18px;
  }

  .hero {
    width: min(calc(100% - 64px), 920px);
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 72px;
    padding-block: 96px 112px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero h1 {
    max-width: 760px;
    font-size: clamp(56px, 7vw, 70px);
  }

  .section,
  .final-cta {
    width: min(calc(100% - 64px), 920px);
  }

  .flow-section {
    width: 100%;
  }

  .flow-heading,
  .flow-list {
    width: min(calc(100% - 64px), 920px);
  }

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

  .section-heading h2 {
    max-width: 860px;
    margin-top: 0;
  }

  .section-heading > p:last-child {
    max-width: 680px;
  }

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

  .flow-step-copy {
    grid-template-columns: 54px minmax(220px, 0.72fr) minmax(260px, 1.28fr);
    padding-right: 0;
  }

  .flow-evidence {
    border-top: 1px solid var(--rule);
    border-left: 0;
  }
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: 1fr auto auto;
    gap: 10px;
    padding-inline: 20px;
  }

  .wordmark span:last-child {
    display: none;
  }

  .header-cta {
    min-height: 44px;
    padding-inline: 12px;
    font-size: 13px;
  }

  .hero,
  .section,
  .final-cta {
    width: 100%;
    padding-inline: 20px;
  }

  .hero {
    gap: 56px;
    padding-block: 72px 88px;
  }

  .flow-section {
    padding-inline: 0;
  }

  .flow-heading,
  .flow-list {
    width: 100%;
    padding-inline: 20px;
  }

  .hero h1 {
    font-size: clamp(38px, 11vw, 44px);
    line-height: 1.06;
    letter-spacing: -0.05em;
  }

  .hero-description {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .hero-actions .button-primary {
    width: 100%;
  }

  .hero-actions .button-secondary {
    width: max-content;
    min-height: 42px;
    padding-inline: 2px;
  }

  .ledger-header,
  .ledger-footer {
    align-items: flex-start;
  }

  .ledger-header {
    display: grid;
  }

  .ledger-row {
    min-height: 136px;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "field result"
      "manifest manifest"
      "onchain onchain";
    gap: 10px 16px;
    padding-block: 14px;
  }

  .ledger-row > span {
    grid-area: field;
  }

  .ledger-manifest {
    grid-area: manifest;
  }

  .ledger-onchain {
    grid-area: onchain;
  }

  .ledger-row em {
    grid-area: result;
  }

  .ledger-manifest::before,
  .ledger-onchain::before {
    display: inline-block;
    width: 86px;
    margin-right: 10px;
    color: var(--quiet);
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.05em;
  }

  .ledger-manifest::before {
    content: "MANIFEST";
  }

  .ledger-onchain::before {
    content: "ON-CHAIN";
  }

  .ledger-row-head {
    display: none;
  }

  .ledger-rule {
    display: grid;
    gap: 8px;
  }

  .section {
    padding-block: 88px;
  }

  .section-heading h2,
  .flow-heading h2 {
    font-size: clamp(36px, 10vw, 44px);
  }

  .section-heading h2 br,
  .flow-heading h2 br {
    display: none;
  }

  .verification-principles {
    grid-template-columns: 1fr;
    margin-top: 56px;
  }

  .verification-principles li {
    min-height: 180px;
  }

  .verification-principles li + li {
    border-top: 1px solid var(--rule);
    border-left: 0;
  }

  .flow-heading {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .flow-progress {
    padding-bottom: 0;
  }

  .flow-progress-line {
    width: min(220px, 54vw);
  }

  .flow-step-copy {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 18px;
    padding-block: 32px;
  }

  .flow-step-copy > p {
    grid-column: 2;
  }

  .flow-step-copy h3 {
    font-size: 28px;
  }

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

  .scope-strip {
    padding: 72px 20px;
  }

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

  .scope-facts {
    margin-top: 48px;
  }

  .final-cta {
    padding-block: 104px;
  }

  .final-cta h2 {
    font-size: clamp(40px, 11vw, 48px);
  }

  .site-footer {
    min-height: 96px;
    display: grid;
    align-content: center;
    padding-inline: 20px;
  }
}

@media (max-width: 560px) {
  .header-cta {
    display: none;
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .flow-evidence,
  .scope-facts {
    grid-template-columns: 1fr;
  }

  .flow-evidence > div + div,
  .scope-facts > div:nth-child(even) {
    border-top: 1px solid var(--rule);
    border-left: 0;
  }

  .scope-facts > div:nth-child(odd),
  .scope-facts > div:nth-child(even) {
    padding-inline: 0;
  }
}

@media (max-height: 640px) and (min-width: 761px) {
  .hero {
    min-height: auto;
    padding-block: 72px;
  }
}

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

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

  html[data-reveal-enhanced="true"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
}