:root {
  color-scheme: light;
  --ink: #111111;
  --paper: #ffffff;
  --wash: #f3f4f4;
  --quiet: #686a6c;
  --line: #d9dad9;
  --gold: #a67c2e;
  --gold-soft: #d9bc75;
  --night: #101112;
  --green: #0a6f47;
  --content: min(1180px, calc(100vw - 48px));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

a {
  color: inherit;
}

::selection {
  color: var(--paper);
  background: var(--ink);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 2px;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  min-height: 76px;
  padding: 12px max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  width: fit-content;
  min-height: 44px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 690;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark,
.closing-mark {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--ink);
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after,
.closing-mark::before,
.closing-mark::after {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--ink);
  content: "";
}

.brand-mark::before,
.closing-mark::before {
  top: 3px;
}

.brand-mark::after,
.closing-mark::after {
  bottom: 3px;
}

.brand-mark i,
.closing-mark i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
}

.brand-context {
  color: var(--quiet);
  font-size: 13px;
  font-weight: 450;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.desktop-nav a {
  position: relative;
  padding: 12px 0;
  color: #47494a;
  font-size: 13px;
  font-weight: 560;
  text-decoration: none;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: 7px;
  left: 0;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: scaleX(0);
  transition: transform 240ms var(--ease);
}

.desktop-nav a:hover::after,
.desktop-nav a:focus-visible::after {
  transform: scaleX(1);
}

.share-button {
  display: flex;
  justify-self: end;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
  font-size: 13px;
  font-weight: 620;
  transition: color 220ms ease, background 220ms ease, border-color 220ms ease;
}

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

.share-button svg,
.primary-action svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  gap: clamp(40px, 5vw, 88px);
  align-items: center;
  width: var(--content);
  min-height: calc(100svh - 76px);
  margin: 0 auto;
  padding: 72px 0 80px;
}

.section-kicker {
  margin: 0 0 24px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.hero h1,
.memo-content h2,
.architecture h2,
.why-now h2,
.compounding h2,
.proof-case h2,
.stage h2,
.capital h2,
.closing h2 {
  margin: 0;
  font-weight: 540;
  letter-spacing: -0.055em;
}

.hero h1 {
  max-width: 740px;
  font-size: clamp(52px, 6.1vw, 92px);
  line-height: 0.98;
}

.hero-summary {
  max-width: 670px;
  margin: 32px 0 0;
  color: #4b4c4e;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.55;
  letter-spacing: -0.018em;
}

.hero-actions,
.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 36px;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--paper);
  background: var(--ink);
  font-size: 15px;
  font-weight: 620;
  text-decoration: none;
  transition: gap 220ms var(--ease), color 220ms ease, background 220ms ease;
}

.primary-action:hover {
  gap: 18px;
  color: var(--ink);
  background: var(--paper);
}

.text-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 4px;
  border: 0;
  border-bottom: 1px solid currentColor;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  font-size: 15px;
  font-weight: 580;
  text-decoration: none;
}

.proof-line {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 0;
  margin: 56px 0 0;
  color: var(--quiet);
  font-size: 13px;
  list-style: none;
}

.proof-line li {
  display: flex;
  gap: 20px;
  align-items: center;
}

.proof-line li:not(:last-child)::after {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--gold);
  content: "";
}

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

.system-stage {
  position: relative;
  width: min(100%, 640px);
  aspect-ratio: 1;
  margin: 0 auto;
}

.system-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  fill: none;
  stroke: #dcdddb;
  stroke-width: 1;
}

.system-lines path:not(.active-path) {
  stroke-dasharray: 3 9;
}

.system-lines .active-path {
  stroke: var(--gold);
  stroke-dasharray: 5 7;
  stroke-width: 1.5;
  transition: d 460ms var(--ease);
  animation: path-flow 10s linear infinite;
}

.orbit-node {
  position: absolute;
  z-index: 2;
  display: flex;
  gap: 9px;
  align-items: center;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid #cccdca;
  border-radius: 999px;
  color: #545556;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  box-shadow: 0 8px 30px rgb(17 17 17 / 5%);
  cursor: pointer;
  font-size: 14px;
  font-weight: 590;
  transition: color 220ms ease, background 220ms ease, border-color 220ms ease, transform 220ms var(--ease);
}

.orbit-node:hover {
  color: var(--ink);
  border-color: var(--ink);
  transform: translateY(-2px);
}

.orbit-node.is-active {
  color: var(--paper);
  border-color: var(--ink);
  background: var(--ink);
}

.node-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-soft);
  box-shadow: 0 0 0 4px rgb(166 124 46 / 12%);
}

.orbit-node--people {
  top: 17%;
  left: 6%;
}

.orbit-node--processes {
  top: 21%;
  right: 0;
}

.orbit-node--tools {
  bottom: 16%;
  left: 2%;
}

.orbit-node--ai {
  right: 4%;
  bottom: 12%;
}

.core-node {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 138px;
  height: 138px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transform: translate(-50%, -50%);
}

.core-glow {
  position: absolute;
  inset: -24%;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(166 124 46 / 28%) 0%, rgb(166 124 46 / 0%) 68%);
  animation: breathe 5s var(--ease) infinite;
}

.core-sphere {
  position: absolute;
  inset: 18px;
  border: 1px solid rgb(255 255 255 / 74%);
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 27%, #fff7d8 0 4%, transparent 5%),
    radial-gradient(circle at 38% 32%, #f1d58c 0%, #b18539 39%, #5e4215 72%, #d6b769 100%);
  box-shadow:
    inset -14px -18px 24px rgb(64 37 0 / 28%),
    inset 12px 12px 20px rgb(255 246 199 / 45%),
    0 16px 52px rgb(103 72 19 / 28%);
}

.core-label {
  position: absolute;
  top: calc(100% + 3px);
  color: var(--ink);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.system-detail {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  width: min(100%, 560px);
  min-height: 96px;
  margin: -18px auto 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.system-detail > span {
  color: var(--gold);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  font-weight: 660;
}

.system-detail strong {
  display: block;
  margin-bottom: 7px;
  font-size: 16px;
  font-weight: 670;
  letter-spacing: -0.02em;
}

.system-detail p,
.interaction-hint {
  margin: 0;
  color: var(--quiet);
  font-size: 14px;
  line-height: 1.5;
}

.system-detail.is-changing > div {
  animation: detail-in 340ms var(--ease);
}

.interaction-hint {
  width: min(100%, 560px);
  margin: 14px auto 0;
  font-size: 12px;
}

.slogan-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: end;
  width: var(--content);
  margin: 0 auto;
  padding: 40px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.slogan-band p {
  margin: 0;
  max-width: 900px;
  font-size: clamp(28px, 4.3vw, 64px);
  font-weight: 510;
  line-height: 1.04;
  letter-spacing: -0.05em;
}

.slogan-band span {
  max-width: 260px;
  color: var(--quiet);
  font-size: 13px;
  line-height: 1.45;
  text-align: right;
}

.memo-section {
  display: grid;
  grid-template-columns: minmax(140px, 0.28fr) minmax(0, 1fr);
  gap: clamp(48px, 8vw, 140px);
  width: var(--content);
  margin: 0 auto;
  padding: clamp(96px, 12vw, 180px) 0;
}

.memo-index {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 280px;
  padding-right: 24px;
  border-right: 1px solid var(--line);
  color: var(--quiet);
  font-size: 13px;
}

.memo-index strong {
  color: var(--ink);
  font-size: 44px;
  font-weight: 440;
  letter-spacing: -0.055em;
}

.memo-content {
  max-width: 880px;
}

.memo-content h2,
.architecture h2,
.why-now h2,
.compounding h2,
.proof-case h2,
.stage h2,
.capital h2,
.closing h2 {
  font-size: clamp(42px, 5.8vw, 78px);
  line-height: 1.02;
}

.memo-content .lead,
.architecture-heading > p:last-child,
.stage-heading > p:last-child {
  max-width: 830px;
  margin: 32px 0 0;
  color: #3e4041;
  font-size: clamp(20px, 2.3vw, 30px);
  line-height: 1.43;
  letter-spacing: -0.025em;
}

.memo-content > p:last-child {
  max-width: 720px;
  margin: 36px 0 0;
  color: var(--quiet);
  font-size: 17px;
  line-height: 1.65;
}

.boundary-question {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 56px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.boundary-question span {
  min-height: 92px;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  font-weight: 620;
  letter-spacing: -0.018em;
}

.architecture {
  padding: clamp(96px, 12vw, 176px) max(24px, calc((100vw - 1180px) / 2));
  color: var(--paper);
  background: var(--night);
}

.architecture-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
  max-width: 1180px;
  margin: 0 auto 72px;
}

.architecture-heading .section-kicker {
  grid-column: 1 / -1;
  margin-bottom: -12px;
  color: var(--gold-soft);
}

.architecture-heading > p:last-child {
  align-self: end;
  margin: 0;
  color: #b9bbba;
  font-size: 18px;
}

.architecture-stack {
  max-width: 1180px;
  margin: 0 auto;
  border-top: 1px solid #444645;
}

.layer {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr auto;
  gap: 48px;
  align-items: center;
  min-height: 180px;
  padding: 36px 0;
  border-bottom: 1px solid #444645;
}

.layer > div > span,
.layer-state,
.capital-grid article > span {
  color: #989a99;
  font-size: 12px;
}

.layer h3 {
  margin: 8px 0 0;
  font-size: clamp(27px, 3vw, 40px);
  font-weight: 530;
  letter-spacing: -0.04em;
}

.layer p {
  max-width: 620px;
  margin: 0;
  color: #c3c5c4;
  font-size: 16px;
  line-height: 1.6;
}

.layer-state {
  min-width: 160px;
  padding: 9px 12px;
  border: 1px solid #494b4a;
  border-radius: 999px;
  color: #d8dad9;
  text-align: center;
}

.layer--core .layer-state {
  color: #f0db9e;
  border-color: #6f5a2f;
}

.boundary-note {
  max-width: 1180px;
  margin: 32px auto 0;
  color: #8c8e8d;
  font-size: 13px;
  line-height: 1.5;
}

.model {
  padding-bottom: clamp(112px, 14vw, 200px);
}

.model-equation {
  display: grid;
  grid-template-columns: auto 42px auto 42px minmax(210px, 1fr);
  gap: 16px;
  align-items: center;
  margin-top: 56px;
  padding: 28px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-size: 16px;
}

.model-equation b {
  color: var(--gold);
  font-size: 24px;
  font-weight: 410;
  text-align: center;
}

.model-equation strong {
  font-size: 18px;
  font-weight: 680;
  text-align: right;
}

.why-now {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 1.12fr);
  gap: clamp(56px, 9vw, 140px);
  width: var(--content);
  margin: 0 auto;
  padding: 0 0 clamp(112px, 15vw, 210px);
}

.why-now h2 {
  font-size: clamp(42px, 5vw, 70px);
}

.convergence-list {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--ink);
  list-style: none;
}

.convergence-list li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 16px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.convergence-list span {
  color: var(--gold);
  font-size: 12px;
  font-weight: 680;
}

.convergence-list p,
.why-now-conclusion {
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.why-now-conclusion {
  grid-column: 2;
  padding-top: 4px;
  color: var(--quiet);
  font-size: 16px;
  line-height: 1.6;
}

.compounding {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(480px, 1.1fr);
  gap: 64px;
  align-items: center;
  padding: clamp(96px, 12vw, 168px) max(24px, calc((100vw - 1180px) / 2));
  background: var(--wash);
}

.compounding-copy {
  max-width: 650px;
}

.compounding h2 {
  font-size: clamp(42px, 5vw, 70px);
}

.compounding-copy > p:not(.section-kicker) {
  margin: 32px 0 0;
  color: #4d4f50;
  font-size: 17px;
  line-height: 1.64;
}

.thesis-label {
  padding: 20px 0 0;
  border-top: 1px solid #caccce;
}

.contract-diagram {
  position: relative;
  width: min(100%, 560px);
  aspect-ratio: 1;
  margin: 0 auto;
}

.contract-core,
.contract-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.contract-core {
  z-index: 2;
  display: grid;
  place-items: center;
  width: 150px;
  height: 150px;
  color: var(--paper);
  background: var(--ink);
  box-shadow: 0 26px 60px rgb(17 17 17 / 16%);
}

.contract-core span {
  width: 90px;
  font-size: 14px;
  font-weight: 640;
  line-height: 1.3;
  text-align: center;
}

.contract-ring {
  width: 76%;
  height: 76%;
  border: 1px solid #c7c8c8;
}

.contract-ring--one span {
  position: absolute;
  display: grid;
  place-items: center;
  min-width: 92px;
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid #c8c9c8;
  border-radius: 999px;
  background: var(--paper);
  box-shadow: 0 8px 24px rgb(17 17 17 / 5%);
  font-size: 13px;
  font-weight: 620;
}

.contract-ring--one span:nth-child(1) { top: -22px; left: 50%; transform: translateX(-50%); }
.contract-ring--one span:nth-child(2) { top: 50%; right: -46px; transform: translateY(-50%); }
.contract-ring--one span:nth-child(3) { bottom: -22px; left: 50%; transform: translateX(-50%); }
.contract-ring--one span:nth-child(4) { top: 50%; left: -46px; transform: translateY(-50%); }

.contract-ring--two {
  width: 98%;
  height: 98%;
  border-color: #dedfdf;
  border-style: dashed;
  animation: slow-turn 36s linear infinite;
}

.proof-case {
  display: grid;
  grid-template-columns: minmax(120px, 0.3fr) minmax(0, 1fr);
  gap: clamp(40px, 8vw, 136px);
  width: var(--content);
  margin: 0 auto;
  padding: clamp(104px, 14vw, 200px) 0;
}

.proof-case-number {
  color: var(--gold);
  font-size: clamp(72px, 10vw, 160px);
  font-weight: 240;
  line-height: 0.8;
}

.proof-case > div:last-child {
  max-width: 840px;
}

.proof-case > div > p:not(.section-kicker) {
  margin: 32px 0 0;
  color: #4b4d4e;
  font-size: 18px;
  line-height: 1.65;
}

.proof-disclaimer {
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--quiet) !important;
  font-size: 14px !important;
}

.stage {
  padding: clamp(96px, 12vw, 168px) max(24px, calc((100vw - 1180px) / 2));
  background: var(--wash);
}

.stage-heading,
.stage-columns {
  max-width: 1180px;
  margin-right: auto;
  margin-left: auto;
}

.stage-heading {
  display: grid;
  grid-template-columns: 1fr 0.4fr;
  gap: 48px;
  align-items: end;
}

.stage-heading .section-kicker,
.capital-heading .section-kicker {
  grid-column: 1 / -1;
  margin-bottom: -14px;
}

.stage-heading > p:last-child {
  margin: 0 0 8px;
  font-size: 16px;
}

.stage-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 72px;
  border: 1px solid #caccce;
}

.stage-columns article {
  padding: clamp(28px, 4vw, 56px);
}

.stage-columns article + article {
  border-left: 1px solid #caccce;
}

.stage-columns h3 {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 0 0 30px;
  font-size: 22px;
  font-weight: 630;
  letter-spacing: -0.025em;
}

.stage-columns h3::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgb(10 111 71 / 10%);
  content: "";
}

.stage-next h3::before {
  background: var(--gold);
  box-shadow: 0 0 0 5px rgb(166 124 46 / 12%);
}

.stage-columns ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

.stage-columns li {
  position: relative;
  padding: 14px 0 14px 24px;
  border-top: 1px solid #d6d8d7;
  color: #454748;
  font-size: 15px;
  line-height: 1.45;
}

.stage-columns li::before {
  position: absolute;
  top: 21px;
  left: 2px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #737574;
  content: "";
}

.capital {
  width: var(--content);
  margin: 0 auto;
  padding: clamp(104px, 14vw, 196px) 0;
}

.capital-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 64px;
  align-items: end;
}

.capital-heading h2 {
  grid-column: 2;
  font-size: clamp(42px, 5.4vw, 76px);
}

.capital-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 80px;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}

.capital-grid article {
  min-height: 260px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capital-grid article > span {
  color: var(--gold);
}

.capital-grid h3 {
  margin: 46px 0 16px;
  font-size: 24px;
  font-weight: 580;
  letter-spacing: -0.035em;
}

.capital-grid p {
  margin: 0;
  color: var(--quiet);
  font-size: 14px;
  line-height: 1.55;
}

.closing {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  padding: clamp(96px, 13vw, 180px) 24px;
  color: var(--paper);
  background: var(--night);
  text-align: center;
}

.closing::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(80vw, 900px);
  aspect-ratio: 1;
  border: 1px solid rgb(255 255 255 / 7%);
  border-radius: 50%;
  box-shadow:
    0 0 0 100px rgb(255 255 255 / 2.5%),
    0 0 0 200px rgb(255 255 255 / 1.5%);
  content: "";
  transform: translate(-50%, -50%);
}

.closing > * {
  position: relative;
  z-index: 1;
}

.closing-mark {
  width: 52px;
  height: 52px;
  margin-bottom: 44px;
  border-color: var(--paper);
}

.closing-mark::before,
.closing-mark::after,
.closing-mark i {
  background: var(--paper);
}

.closing-mark::before { top: 7px; }
.closing-mark::after { bottom: 7px; }
.closing-mark i { width: 18px; height: 18px; }

.closing .section-kicker {
  color: var(--gold-soft);
}

.closing h2 {
  max-width: 1000px;
}

.closing > p:not(.section-kicker) {
  max-width: 650px;
  margin: 30px 0 0;
  color: #b9bbba;
  font-size: 17px;
  line-height: 1.6;
}

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

.primary-action--light:hover {
  color: var(--paper);
  background: transparent;
}

.text-action--light {
  color: var(--paper);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px 40px;
  align-items: start;
  padding: 40px max(24px, calc((100vw - 1180px) / 2));
  border-top: 1px solid #292b2a;
  color: #a6a8a7;
  background: var(--night);
  font-size: 12px;
}

.site-footer p,
.site-footer div {
  margin: 0;
}

.site-footer > p:first-child {
  color: var(--paper);
  font-size: 14px;
  font-weight: 600;
}

.site-footer div {
  display: flex;
  gap: 20px;
  justify-content: flex-end;
}

.site-footer .legal {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid #292b2a;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: max(22px, env(safe-area-inset-bottom));
  z-index: 120;
  padding: 12px 16px;
  border: 1px solid #3b3d3c;
  border-radius: 999px;
  color: var(--paper);
  background: var(--night);
  box-shadow: 0 12px 40px rgb(0 0 0 / 18%);
  font-size: 13px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 220ms ease, transform 220ms var(--ease);
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--gold) 72%, white);
  outline-offset: 4px;
}

@keyframes path-flow {
  to { stroke-dashoffset: -120; }
}

@keyframes breathe {
  0%, 100% { opacity: 0.62; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1.08); }
}

@keyframes slow-turn {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes detail-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 980px) {
  :root {
    --content: min(100% - 40px, 760px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
    padding-right: 20px;
    padding-left: 20px;
  }

  .desktop-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 56px;
    min-height: auto;
    padding-top: 72px;
  }

  .hero-system {
    width: min(100%, 650px);
    margin: 0 auto;
  }

  .slogan-band {
    grid-template-columns: 1fr;
  }

  .slogan-band span {
    text-align: left;
  }

  .architecture-heading,
  .stage-heading,
  .capital-heading {
    grid-template-columns: 1fr;
  }

  .architecture-heading h2,
  .architecture-heading > p:last-child,
  .stage-heading h2,
  .stage-heading > p:last-child,
  .capital-heading h2 {
    grid-column: 1;
  }

  .layer {
    grid-template-columns: 0.7fr 1.3fr;
  }

  .layer-state {
    grid-column: 2;
    width: fit-content;
  }

  .why-now,
  .compounding {
    grid-template-columns: 1fr;
  }

  .why-now-conclusion {
    grid-column: 1;
  }

  .contract-diagram {
    width: min(100%, 520px);
  }

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

@media (max-width: 680px) {
  :root {
    --content: calc(100% - 32px);
  }

  html {
    scroll-padding-top: 74px;
  }

  .site-header {
    min-height: 66px;
    padding: 10px 16px;
  }

  .brand-context,
  .share-button span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .share-button {
    width: 44px;
    padding: 0;
    justify-content: center;
  }

  .hero {
    padding: 56px 0 64px;
  }

  .hero h1 {
    font-size: clamp(43px, 13vw, 64px);
  }

  .hero-summary {
    font-size: 17px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-action,
  .hero .text-action {
    width: 100%;
  }

  .proof-line {
    gap: 10px 16px;
    margin-top: 40px;
  }

  .proof-line li {
    gap: 16px;
  }

  .system-stage {
    width: calc(100% + 12px);
    margin-left: -6px;
  }

  .orbit-node {
    min-height: 44px;
    padding: 0 12px;
    font-size: 12px;
  }

  .orbit-node--people { top: 13%; left: 0; }
  .orbit-node--processes { top: 18%; right: -3px; }
  .orbit-node--tools { bottom: 12%; left: -2px; }
  .orbit-node--ai { right: 0; bottom: 8%; }

  .core-node {
    width: 108px;
    height: 108px;
  }

  .core-sphere {
    inset: 15px;
  }

  .system-detail {
    grid-template-columns: 52px 1fr;
    margin-top: -4px;
  }

  .slogan-band {
    padding: 32px 0;
  }

  .memo-section {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 96px 0;
  }

  .memo-index {
    flex-direction: row;
    min-height: auto;
    padding: 0 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .memo-index strong {
    font-size: 24px;
  }

  .memo-content h2,
  .architecture h2,
  .why-now h2,
  .compounding h2,
  .proof-case h2,
  .stage h2,
  .capital h2,
  .closing h2 {
    font-size: clamp(38px, 11vw, 54px);
  }

  .memo-content .lead,
  .architecture-heading > p:last-child {
    font-size: 19px;
  }

  .boundary-question {
    grid-template-columns: 1fr;
    margin-top: 44px;
  }

  .boundary-question span {
    min-height: 68px;
  }

  .architecture,
  .stage,
  .compounding {
    padding-right: 16px;
    padding-left: 16px;
  }

  .architecture-heading {
    gap: 28px;
    margin-bottom: 48px;
  }

  .layer {
    grid-template-columns: 1fr;
    gap: 22px;
    min-height: auto;
  }

  .layer-state {
    grid-column: 1;
  }

  .model-equation {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .model-equation b {
    transform: rotate(90deg);
  }

  .model-equation strong {
    text-align: left;
  }

  .why-now {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .contract-diagram {
    width: calc(100vw - 48px);
  }

  .contract-core {
    width: 120px;
    height: 120px;
  }

  .contract-ring--one span {
    min-width: 76px;
    font-size: 11px;
  }

  .contract-ring--one span:nth-child(2) { right: -34px; }
  .contract-ring--one span:nth-child(4) { left: -34px; }

  .proof-case {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .proof-case-number {
    font-size: 72px;
  }

  .stage-heading {
    gap: 28px;
  }

  .stage-columns {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .stage-columns article + article {
    border-top: 1px solid #caccce;
    border-left: 0;
  }

  .capital-heading {
    gap: 28px;
  }

  .capital-grid {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .capital-grid article {
    min-height: 220px;
  }

  .closing-actions {
    width: 100%;
    flex-direction: column;
  }

  .closing-actions .primary-action,
  .closing-actions .text-action {
    width: min(100%, 360px);
  }

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

  .site-footer div {
    flex-direction: column;
    gap: 8px;
  }
}

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

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

@media print {
  .site-header,
  .scroll-progress,
  .interaction-hint,
  .toast,
  .hero-actions,
  .closing-actions {
    display: none !important;
  }

  body,
  .architecture,
  .closing,
  .site-footer {
    color: #000;
    background: #fff;
  }

  .hero {
    min-height: auto;
  }

  .hero-system,
  .contract-diagram {
    break-inside: avoid;
  }
}