@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("assets/fonts/inter-var.woff2") format("woff2");
}

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

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("assets/fonts/plex-mono-500.woff2") format("woff2");
}

:root {
  color-scheme: light;
  --ink: #20211e;
  --ink-deep: #181a17;
  --paper: #f5f2ec;
  --paper-2: #ebe9e3;
  --white: #fffefb;
  --stone: #686b66;
  --sand: #d8d0c3;
  --sand-2: #f0ede7;
  --sky: #dfe8e6;
  --sky-dark: #56716e;
  --lilac: #ebe9e3;
  --line: rgb(32 33 30 / .16);
  --dark-line: rgb(255 254 251 / .22);
  --text-label: .7rem;
  --text-body: 1rem;
  --text-lede: 1.3rem;
  --text-heading: clamp(1.95rem, 2.35vw, 2.7rem);
  --text-subhead: clamp(1.15rem, 1.35vw, 1.35rem);
  --max: 1180px;
  --gutter: max(1.25rem, calc((100vw - var(--max)) / 2));
  --display: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-family: var(--display);
  font-synthesis: none;
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }

html { background: var(--ink-deep); }

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-size: var(--text-body);
  line-height: 1.55;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: .75rem;
  left: .75rem;
  padding: .75rem 1rem;
  transform: translateY(-160%);
  background: var(--sand);
  color: var(--ink);
  font-weight: 700;
}

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

.site-header {
  position: relative;
  display: grid;
  min-height: 80px;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding-inline: var(--gutter);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
}

.mark {
  display: inline-flex;
  width: max-content;
  align-items: center;
  gap: .8rem;
  color: var(--white);
  text-decoration: none;
  font-size: var(--text-body);
  font-weight: 750;
  letter-spacing: -.02em;
}

.mark span {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  border-radius: .25rem;
  background: var(--sand);
  color: var(--ink);
  font: 500 var(--text-label)/1 var(--mono);
  letter-spacing: -.05em;
}

.site-header nav { display: flex; gap: clamp(1.25rem, 3vw, 2.75rem); }

.site-header nav a,
.header-link {
  position: relative;
  color: var(--stone);
  text-decoration: none;
  font: 500 var(--text-label)/1 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.site-header nav a::after,
.header-link::after {
  position: absolute;
  right: 0;
  bottom: -.55rem;
  left: 0;
  height: 1px;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  background: var(--ink);
  transition: transform .22s ease;
}

.site-header nav a:hover::after,
.site-header nav a:focus-visible::after,
.header-link:hover::after,
.header-link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-link { justify-self: end; }

.site-header .mark { color: var(--ink); }
.site-header .mark span { background: var(--ink); color: var(--paper); }

.hero {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
}

.hero-content {
  display: flex;
  width: min(760px, calc(100% - 2.5rem));
  flex-direction: column;
  justify-content: center;
  margin-inline: auto;
  padding-block: clamp(6rem, 11vw, 9rem);
  text-align: center;
}

.eyebrow,
.section-label {
  margin: 0;
  color: var(--stone);
  font: 500 var(--text-label)/1.3 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hero-eyebrow {
  display: flex;
  width: 100%;
  justify-content: space-between;
  color: var(--stone);
}

.hero h1 {
  margin: 2rem 0 1.5rem;
  font-size: clamp(2.8rem, 4.8vw, 4rem);
  font-weight: 560;
  letter-spacing: -.04em;
  line-height: 1;
}

.hero h1 span { display: block; }

.hero-bottom {
  display: flex;
  max-width: 36rem;
  align-items: center;
  flex-direction: column;
  gap: 2rem;
  margin-inline: auto;
}

.hero-bottom p {
  margin: 0;
  color: var(--ink);
  font-size: var(--text-lede);
  font-weight: 430;
  letter-spacing: -.025em;
  line-height: 1.25;
}

.read-link,
.final-link {
  display: inline-flex;
  min-height: 2.8rem;
  align-items: center;
  gap: .8rem;
  border-bottom: 1px solid currentColor;
  text-decoration: none;
  font: 500 var(--text-label)/1 var(--mono);
  letter-spacing: .05em;
  text-transform: uppercase;
  transition: color .2s ease, gap .2s ease;
}

.read-link { color: var(--ink); }

.read-link:hover,
.read-link:focus-visible { color: var(--sky-dark); gap: 1.2rem; }

.final-link:hover,
.final-link:focus-visible { color: var(--sky); gap: 1.2rem; }

#contents,
#vision,
#protocol,
#verification,
#economy,
#roadmap,
#principles,
#north-star { scroll-margin-top: 1.5rem; }

.contents {
  display: grid;
  grid-template-columns: minmax(14rem, .85fr) minmax(0, 1.5fr);
  gap: clamp(3rem, 8vw, 9rem);
  padding: clamp(5rem, 8vw, 8rem) var(--gutter);
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
}

.contents-intro {
  position: sticky;
  top: 2rem;
  align-self: start;
}

.contents h2 {
  max-width: 11ch;
  margin: 2rem 0 1.5rem;
  font-size: var(--text-heading);
  font-weight: 550;
  letter-spacing: -.035em;
  line-height: 1.02;
}

.contents-intro > p:last-child {
  max-width: 27rem;
  margin: 0;
  color: var(--stone);
}

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

.contents-list a {
  display: grid;
  min-height: 7.4rem;
  grid-template-columns: 3rem minmax(9rem, .8fr) minmax(15rem, 1.35fr);
  gap: clamp(1rem, 3vw, 3rem);
  align-items: center;
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background .2s ease, padding-inline .2s ease;
}

.contents-list a:hover,
.contents-list a:focus-visible {
  padding-inline: 1.4rem .6rem;
  background: rgb(255 254 251 / .5);
}

.contents-list span {
  color: var(--sky-dark);
  font: 500 var(--text-label)/1 var(--mono);
}

.contents-list strong {
  font-size: var(--text-subhead);
  font-weight: 560;
  letter-spacing: -.02em;
}

.contents-list small {
  color: var(--stone);
  font-size: var(--text-body);
  line-height: 1.5;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr);
  gap: clamp(2rem, 7vw, 7rem);
}

.thesis {
  padding: clamp(5rem, 7.5vw, 7.5rem) var(--gutter);
  border-bottom: 1px solid var(--line);
}

.thesis h2,
.system h2,
.horizon h2,
.finale h2 {
  margin: 0;
  font-size: var(--text-heading);
  font-weight: 550;
  letter-spacing: -.035em;
  line-height: 1.02;
}

em { color: var(--sky-dark); font-style: normal; }

.thesis .lede {
  max-width: 30ch;
  margin: 2.8rem 0 1.25rem;
  color: var(--ink);
  font-size: var(--text-lede);
  font-weight: 430;
  letter-spacing: -.03em;
  line-height: 1.22;
}

.thesis div > p:last-child {
  max-width: 43rem;
  margin: 0;
  color: var(--stone);
  font-size: var(--text-body);
}

.principles { padding: clamp(5rem, 7.5vw, 7.5rem) var(--gutter); }

.principles-heading {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr);
  gap: clamp(2rem, 7vw, 7rem);
  margin-bottom: 4.5rem;
}

.principles-heading h2 {
  max-width: 16ch;
  margin: 0;
  font-size: var(--text-heading);
  font-weight: 550;
  letter-spacing: -.03em;
  line-height: 1.05;
}

.principle-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.principle-list li {
  display: grid;
  grid-template-columns: minmax(3.5rem, .55fr) minmax(17rem, 1.7fr) minmax(18rem, 1.25fr);
  gap: clamp(1.5rem, 4vw, 4.5rem);
  align-items: start;
  padding: clamp(2.6rem, 4.5vw, 4.25rem) 0;
  border-top: 1px solid var(--line);
}

.principle-list li:last-child { border-bottom: 1px solid var(--line); }

.principle-number {
  color: var(--sky-dark);
  font: 500 var(--text-label)/1 var(--mono);
}

.principle-list li:nth-child(3n + 2) .principle-number,
.principle-list li:nth-child(3n) .principle-number { color: var(--stone); }

.principle-list h3 {
  margin: 0;
  font-size: var(--text-subhead);
  font-weight: 550;
  letter-spacing: -.03em;
  line-height: 1.05;
}

.principle-list p {
  max-width: 31rem;
  margin: 0;
  color: var(--stone);
}

.system {
  padding: clamp(5rem, 7.5vw, 7.5rem) var(--gutter);
  background: var(--paper-2);
  color: var(--ink);
}

.system .section-label { color: var(--sky-dark); }
.system .lede { margin: 1.8rem 0 0; color: var(--stone); font-size: var(--text-lede); }

.spine {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: clamp(4.5rem, 8vw, 7rem) 0 0;
  padding: 0;
  list-style: none;
}

.spine::before {
  position: absolute;
  top: 2rem;
  right: 10%;
  left: 10%;
  height: 1px;
  content: "";
  background: rgb(32 33 30 / .5);
}

.spine li {
  position: relative;
  display: grid;
  justify-items: center;
  text-align: center;
}

.spine li::before {
  z-index: 1;
  width: .78rem;
  height: .78rem;
  margin: 1.62rem 0 1.8rem;
  border: .2rem solid var(--sky);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 1px var(--ink);
  content: "";
}

.spine li:nth-child(3)::before { background: var(--white); }

.spine span {
  position: absolute;
  top: 0;
  font: 500 var(--text-label)/1 var(--mono);
}

.spine strong {
  font-size: var(--text-subhead);
  font-weight: 560;
  letter-spacing: -.03em;
}

.spine small {
  color: var(--stone);
  font: var(--text-label)/1.8 var(--mono);
  text-transform: uppercase;
}

.horizon { padding: clamp(5rem, 7.5vw, 7.5rem) var(--gutter); }

.horizon-heading {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr);
  gap: clamp(2rem, 7vw, 7rem);
  margin-bottom: clamp(4rem, 8vw, 7rem);
}

.horizon-steps {
  margin-left: min(23vw, 18rem);
  border-top: 1px solid var(--line);
}

.horizon-steps article {
  display: grid;
  grid-template-columns: minmax(7rem, .55fr) minmax(14rem, 1.15fr) minmax(16rem, 1.1fr);
  gap: clamp(1.5rem, 4vw, 4.5rem);
  padding: clamp(2.5rem, 4.5vw, 4rem) 0;
  border-bottom: 1px solid var(--line);
}

.horizon-steps p { margin: 0; color: var(--stone); }

.horizon-steps article > p:first-child {
  color: var(--sky-dark);
  font: 500 var(--text-label)/1.5 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
}

.horizon-steps article:nth-child(2) > p:first-child,
.horizon-steps article:nth-child(3) > p:first-child { color: var(--stone); }

.horizon-steps h3 {
  margin: 0;
  font-size: var(--text-subhead);
  font-weight: 550;
  letter-spacing: -.025em;
  line-height: 1.08;
}

.finale {
  position: relative;
  min-height: 82svh;
  overflow: hidden;
  padding: clamp(7rem, 11vw, 11rem) var(--gutter);
  background: var(--ink-deep);
  color: var(--white);
  isolation: isolate;
}

.finale-glow {
  position: absolute;
  z-index: -1;
  right: -12vw;
  bottom: -23vw;
  width: 65vw;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(191 222 225 / .22), transparent 65%);
}

.finale .section-label { color: var(--sand); }

.finale h2 {
  max-width: 15ch;
  margin: 2.8rem 0 4rem;
  font-size: var(--text-heading);
}

.finale em { color: var(--sky); }
.final-link { color: var(--sand); }

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem var(--gutter);
  border-top: 1px solid var(--dark-line);
  background: var(--ink-deep);
  color: rgb(255 254 251 / .58);
  font: var(--text-label)/1.4 var(--mono);
  letter-spacing: .05em;
  text-transform: uppercase;
}

footer p { margin: 0; }
footer p:last-child { justify-self: end; }

.contrast-section,
.market-section,
.router-section,
.offchain-section,
.verification,
.optimistic-section,
.assurance-section,
.economics-section,
.challenger-section,
.utility-section,
.money-section,
.agent-section,
.service-market,
.research-section {
  padding: clamp(5rem, 7.5vw, 7.5rem) var(--gutter);
}

.contrast-heading,
.verification-heading {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 2.1fr) minmax(15rem, .9fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
  margin-bottom: clamp(4rem, 7vw, 7rem);
}

.contrast-heading .section-label { align-self: start; }

.contrast-heading h2,
.market-copy h2,
.router-section h2,
.offchain-section h2,
.verification h2,
.optimistic-section h2,
.assurance-section h2,
.economics-section h2,
.challenger-section h2,
.utility-section h2,
.money-section h2,
.agent-section h2,
.service-market h2,
.research-section h2 {
  margin: 0;
  font-size: var(--text-heading);
  font-weight: 550;
  letter-spacing: -.035em;
  line-height: 1.03;
}

.contrast-section { background: var(--paper-2); }

.contrast-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contrast-grid article {
  min-height: 31rem;
  padding: clamp(2rem, 4vw, 4rem);
}

.contrast-grid article + article { border-left: 1px solid var(--line); }
.contrast-grid .pastel-panel { background: var(--paper-2); }

.micro-label {
  margin: 0 0 2.5rem;
  color: var(--sky-dark);
  font: 500 var(--text-label)/1.3 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
}

.contrast-grid ul {
  margin: 0 0 3.5rem;
  padding: 0;
  list-style: none;
}

.contrast-grid li {
  padding: .8rem 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--text-lede);
  font-weight: 540;
  letter-spacing: -.025em;
}

.contrast-grid article > p:last-child {
  max-width: 35rem;
  margin: 0;
  color: var(--stone);
}

.contrast-grid .pastel-panel > p:last-child { color: var(--stone); }

.declaration {
  padding: clamp(6rem, 11vw, 11rem) var(--gutter);
  background: var(--paper-2);
}

.declaration .section-label { color: var(--stone); }

.declaration blockquote {
  max-width: 1100px;
  margin: 2.5rem 0 0;
  font-size: var(--text-heading);
  font-weight: 550;
  letter-spacing: -.035em;
  line-height: 1.04;
}

.protocol-spine { grid-template-columns: repeat(6, 1fr); }
.protocol-spine::before { right: 8%; left: 8%; }

.market-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 8vw, 9rem);
  align-items: center;
  background: var(--paper);
}

.market-copy p:not(.section-label) {
  max-width: 38rem;
  color: var(--stone);
}

.market-copy h2 { margin: 2rem 0 2.5rem; }

.specimen {
  border: 1px solid rgb(32 33 30 / .2);
  background: rgb(255 254 251 / .62);
}

.specimen .micro-label { margin: 0; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--line); }
.specimen dl { margin: 0; }

.specimen dl div {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: .95rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.specimen dt {
  color: var(--stone);
  font: 400 var(--text-label)/1.5 var(--mono);
  letter-spacing: .05em;
  text-transform: uppercase;
}

.specimen dd { margin: 0; font: 500 var(--text-label)/1.5 var(--mono); text-align: right; }

.specimen-result {
  margin: 0;
  padding: 1.3rem 1.5rem;
  background: var(--ink);
  color: var(--sky);
  font: 500 var(--text-label)/1.4 var(--mono);
}

.router-section { background: var(--paper); }

.router-section .lede,
.assurance-section .lede { margin: 1.8rem 0 1rem; color: var(--stone); font-size: var(--text-lede); }

.router-section .section-grid div > p:last-child { max-width: 47rem; color: var(--stone); }

.protocol-diagram {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--paper);
}

.market-diagram {
  margin-top: clamp(5rem, 9vw, 8rem);
  background: var(--paper-2);
}

.protocol-diagram svg {
  display: block;
  width: 100%;
  height: auto;
  shape-rendering: geometricPrecision;
}

.protocol-diagram .diagram-mobile { display: none; }

.diagram-node {
  fill: var(--paper);
  stroke: rgb(32 33 30 / .38);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.diagram-node-primary { fill: var(--ink-deep); stroke: var(--ink-deep); }
.diagram-node-muted { fill: var(--paper-2); }
.diagram-node-terminal { fill: rgb(191 222 225 / .34); }
.diagram-node-danger { fill: rgb(218 199 172 / .34); }

.diagram-line {
  fill: none;
  stroke: var(--sky-dark);
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.35;
  vector-effect: non-scaling-stroke;
}

.protocol-diagram marker path { fill: var(--sky-dark); }

.diagram-title,
.diagram-detail {
  fill: var(--ink);
  font-family: var(--mono);
}

.diagram-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .04em;
}

.diagram-detail {
  fill: var(--stone);
  font-size: 13px;
  font-weight: 450;
  letter-spacing: .025em;
}

.diagram-title-inverse { fill: var(--white); }
.diagram-detail-inverse { fill: var(--sky); }

.protocol-diagram figcaption {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--stone);
  font-size: var(--text-label);
  line-height: 1.5;
}

.offchain-section {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr);
  gap: clamp(2rem, 7vw, 7rem);
  background: var(--ink-deep);
  color: var(--white);
}

.offchain-section .section-label { color: var(--sand); }
.offchain-section div p { max-width: 47rem; color: rgb(255 254 251 / .68); }
.offchain-section h2 { max-width: 16ch; margin-bottom: 2.5rem; }

.verification { background: var(--paper); }
.verification-heading { grid-template-columns: minmax(10rem, .8fr) minmax(0, 2fr) minmax(16rem, 1fr); }
.verification-heading > p:last-child { margin: 0; color: var(--stone); }

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

.verification-list li {
  display: grid;
  grid-template-columns: minmax(3.5rem, .4fr) minmax(11rem, .8fr) minmax(0, 2fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  padding: clamp(2rem, 3.5vw, 3.3rem) 0;
  border-bottom: 1px solid var(--line);
}

.verification-list li > span { color: var(--sky-dark); font: 500 var(--text-label)/1.4 var(--mono); }
.verification-list h3 { margin: 0; font-size: var(--text-subhead); font-weight: 560; letter-spacing: -.025em; }
.verification-list p { max-width: 39rem; margin: 0; color: var(--stone); }

.optimistic-section {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  background: var(--paper-2);
}

.optimistic-copy h2 { margin: 2rem 0 2.4rem; }
.optimistic-copy p:not(.section-label) { max-width: 39rem; color: var(--stone); }

.assurance-section { background: var(--paper-2); }

.assurance-levels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: clamp(4rem, 7vw, 7rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  list-style: none;
}

.assurance-levels li {
  display: grid;
  min-height: 12rem;
  align-content: space-between;
  padding: 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.assurance-levels span,
.assurance-levels small { color: var(--stone); font: var(--text-label)/1.4 var(--mono); text-transform: uppercase; }
.assurance-levels strong { font-size: var(--text-subhead); font-weight: 550; letter-spacing: -.02em; }
.assurance-levels li:nth-child(2),
.assurance-levels li:nth-child(3),
.assurance-levels li:nth-child(5),
.assurance-levels li:nth-child(6) { background: var(--paper-2); }

.economics-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  background: var(--paper);
}

.economics-copy h2 { margin: 2rem 0 2.3rem; }
.economics-copy p:last-child { max-width: 42rem; color: var(--stone); }

.equation {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: center;
  padding: clamp(2rem, 4vw, 4rem);
  background: var(--ink-deep);
  color: var(--white);
  text-align: center;
}

.equation span { font-size: var(--text-subhead); font-weight: 550; line-height: 1.25; }
.equation strong { color: var(--sky); font-size: var(--text-heading); font-weight: 400; }
.equation small { grid-column: 1 / -1; margin-top: 1.5rem; color: var(--sand); font: var(--text-label)/1.4 var(--mono); }

.challenger-section,
.money-section,
.research-section {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr);
  gap: clamp(2rem, 7vw, 7rem);
}

.challenger-section { background: var(--paper-2); }
.challenger-section .section-label { color: var(--stone); }
.challenger-section h2 { margin-bottom: 2.3rem; }
.challenger-section div p { max-width: 49rem; color: var(--stone); }

.utility-section,
.agent-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
}

.utility-section { background: var(--paper); }
.utility-section h2 { margin: 2rem 0 2.3rem; }
.utility-section div > p:last-child { max-width: 42rem; color: var(--stone); }

.utility-equation {
  padding: clamp(2.5rem, 5vw, 5rem);
  background: var(--paper-2);
  text-align: center;
}

.utility-equation > span { display: block; font-size: var(--text-subhead); font-weight: 550; }
.utility-equation hr { max-width: 34rem; margin: 1.2rem auto; border: 0; border-top: 1px solid var(--ink); }
.utility-equation small { display: block; margin-top: 2rem; color: var(--stone); font: var(--text-label)/1.4 var(--mono); text-transform: uppercase; }

.money-section { background: var(--paper); }
.money-section h2 { margin-bottom: 2.3rem; }
.money-section div p { max-width: 48rem; color: var(--stone); }

.agent-section { background: var(--paper-2); }
.agent-copy h2 { margin: 2rem 0 2.3rem; }
.agent-copy p:not(.section-label) { max-width: 42rem; color: var(--stone); }

.agent-budget { border: 1px solid var(--line); background: var(--paper); }

.agent-budget > div,
.agent-budget li {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 1rem;
  padding: 1rem 1.4rem;
  border-bottom: 1px solid var(--line);
}

.agent-budget > div span,
.agent-budget li span { color: var(--stone); font: var(--text-label)/1.5 var(--mono); text-transform: uppercase; }
.agent-budget strong { font-weight: 560; text-align: right; }
.agent-budget ul { margin: 0; padding: 0; list-style: none; }
.agent-budget li b { font: 500 var(--text-label)/1.5 var(--mono); text-align: right; }
.agent-budget li:last-child { border-bottom: 0; }

.service-market {
  background: var(--ink-deep);
  color: var(--white);
}

.service-market .section-label { color: var(--sand); }
.service-market h2 { max-width: 15ch; margin-top: 2rem; }

.service-columns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(4rem, 7vw, 7rem);
  border-top: 1px solid var(--dark-line);
  border-left: 1px solid var(--dark-line);
}

.service-columns div {
  display: grid;
  min-height: 19rem;
  align-content: start;
  padding: 1.5rem;
  border-right: 1px solid var(--dark-line);
  border-bottom: 1px solid var(--dark-line);
}

.service-columns strong { margin-bottom: 2rem; color: var(--sky); font-size: var(--text-subhead); font-weight: 550; }
.service-columns span { padding: .65rem 0; border-bottom: 1px solid var(--dark-line); color: rgb(255 254 251 / .65); }

.research-section { background: var(--paper-2); }
.research-section .section-label { color: var(--sky-dark); }
.research-section h2 { max-width: 17ch; margin-bottom: 2.5rem; }
.research-section div p { max-width: 49rem; color: var(--stone); }

.compact-principles li { grid-template-columns: minmax(3.5rem, .5fr) minmax(17rem, 1.45fr) minmax(18rem, 1.25fr); }
.compact-principles h3 { font-size: var(--text-subhead); }

.north-star-copy {
  max-width: 52rem;
  margin: 0 0 2.5rem;
  color: rgb(255 254 251 / .7);
  font-size: var(--text-body);
}

.north-star-answer {
  max-width: 45rem;
  margin: 0 0 4rem;
  font-size: var(--text-lede);
  font-weight: 560;
  letter-spacing: -.03em;
  line-height: 1.25;
}

:focus-visible { outline: 2px solid var(--sky); outline-offset: 5px; }

@media (max-width: 760px) {
  :root { --gutter: 1.25rem; }

  .site-header { min-height: 76px; grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .mark { font-size: var(--text-body); }
  .mark span { width: 2.4rem; height: 2.4rem; }
  .hero-content { width: calc(100% - 2.5rem); padding-block: 5rem; }
  .hero h1 { font-size: 2.8rem; }

  .contents { grid-template-columns: 1fr; gap: 3rem; }
  .contents-intro { position: static; }
  .contents h2 { max-width: 12ch; }
  .contents-list a {
    min-height: auto;
    grid-template-columns: 2rem 1fr;
    gap: .55rem 1rem;
    padding: 1.4rem 0;
  }
  .contents-list a:hover,
  .contents-list a:focus-visible { padding-inline: .5rem; }
  .contents-list small { grid-column: 2; }

  .section-grid,
  .principles-heading,
  .horizon-heading,
  .contrast-heading,
  .verification-heading,
  .market-section,
  .offchain-section,
  .optimistic-section,
  .economics-section,
  .challenger-section,
  .utility-section,
  .money-section,
  .agent-section,
  .research-section { grid-template-columns: 1fr; }

  .contrast-grid { grid-template-columns: 1fr; }
  .contrast-grid article { min-height: auto; padding: 2rem 0; }
  .contrast-grid article + article { padding-inline: 1.25rem; border-top: 1px solid var(--line); border-left: 0; }
  .declaration blockquote { font-size: var(--text-heading); }

  .principle-list li,
  .horizon-steps article,
  .verification-list li { grid-template-columns: 1fr; }
  .principle-list li { gap: 1rem; }
  .principle-list h3 br { display: none; }

  .market-section,
  .optimistic-section,
  .economics-section,
  .utility-section,
  .agent-section { gap: 4rem; }

  .protocol-diagram .diagram-desktop { display: none; }
  .protocol-diagram .diagram-mobile { display: block; }

  .verification-heading { align-items: start; }
  .verification-list li { gap: .8rem; }

  .assurance-levels { grid-template-columns: 1fr; }
  .assurance-levels li { min-height: 9rem; }

  .equation { grid-template-columns: 1fr; }
  .equation small { grid-column: 1; }

  .agent-budget > div,
  .agent-budget li { grid-template-columns: 1fr; }
  .agent-budget strong,
  .agent-budget li b { text-align: left; }

  .service-columns { grid-template-columns: 1fr; }
  .service-columns div { min-height: auto; }

  .spine {
    grid-template-columns: 1fr;
    padding-left: 1rem;
  }

  .spine::before { top: 1.5rem; bottom: 1.5rem; left: 1.36rem; width: 1px; height: auto; }

  .spine li {
    grid-template-columns: 2.6rem 1fr;
    justify-items: start;
    padding: .9rem 0;
    text-align: left;
  }

  .spine li::before { grid-row: 1 / 3; margin: .25rem 0; }
  .spine span { display: none; }
  .spine strong, .spine small { grid-column: 2; }

  .horizon-steps { margin-left: 0; }
  .horizon-steps article { gap: .9rem; }
  .refusal { gap: 2.5rem; }

  footer { grid-template-columns: 1fr; }
  footer p:last-child { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}