:root {
  --ink: #070b10;
  --blue: #1268ff;
  --white: #f7f8fa;
  --line: rgba(18, 104, 255, 0.72);
  --white-72: rgba(247, 248, 250, 0.72);
  --white-52: rgba(247, 248, 250, 0.52);
  --ink-72: rgba(7, 11, 16, 0.72);
  --max: 1520px;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body { margin: 0; background: var(--ink); color: var(--white); font-family: var(--sans); line-height: 1.35; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { background: var(--blue); color: var(--ink); }

.skip-link { position: fixed; left: 10px; top: 10px; z-index: 999; transform: translateY(-160%); background: var(--white); color: var(--ink); padding: 10px 14px; font: 700 12px var(--mono); }
.skip-link:focus { transform: translateY(0); }

.site-header {
  width: min(calc(100% - 72px), var(--max));
  margin: 0 auto;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { color: var(--blue); text-decoration: none; font: 800 24px/1 var(--mono); letter-spacing: .24em; }
.nav { display: flex; align-items: center; gap: 32px; font: 700 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: rgba(247,248,250,.82); }
.nav a { text-decoration: none; }
.nav a:hover { color: var(--blue); }
.nav-divider { width: 1px; height: 30px; background: var(--blue); margin-left: 6px; }
.lang { color: var(--white); }
.menu-toggle, .mobile-nav { display: none; }

main { width: min(calc(100% - 72px), var(--max)); margin: 0 auto; }
.panel-dark { background: var(--ink); }
.panel-blue { background: var(--blue); }

.eyebrow, .micro, .index { font: 700 11px/1.3 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.eyebrow { margin: 0 0 20px; }

.hero { min-height: 600px; display: grid; grid-template-columns: 1.02fr 1fr; border-bottom: 1px solid var(--line); }
.hero-diagram { display: flex; flex-direction: column; justify-content: center; padding: 72px 58px 48px; min-width: 0; }
.hero-copy { padding: 66px 58px 48px; color: var(--white); display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.hero-copy h1 { margin: 0; font-size: clamp(58px, 6.2vw, 108px); line-height: .84; letter-spacing: -.07em; font-weight: 700; }
.hero-kicker { font-size: clamp(22px, 2.3vw, 40px); line-height: 1.06; font-weight: 700; letter-spacing: -.035em; margin: 26px 0 20px; max-width: 800px; }
.hero-summary { margin: 0; font-size: 18px; line-height: 1.52; max-width: 720px; }
.hero-actions { display: grid; grid-template-columns: 1.16fr 1fr .72fr; gap: 12px; margin-top: 34px; }
.button { min-height: 54px; border: 1px solid currentColor; display: inline-flex; align-items: center; justify-content: space-between; gap: 18px; padding: 0 20px; text-decoration: none; font: 700 12px var(--mono); letter-spacing: .06em; }
.button-light { background: var(--white); color: var(--blue); border-color: var(--white); }
.button-outline-light { color: var(--white); background: transparent; }
.text-link { display: inline-flex; width: max-content; gap: 12px; align-items: center; margin-top: 24px; padding-bottom: 4px; text-decoration: none; border-bottom: 1px solid currentColor; font: 700 11px var(--mono); letter-spacing: .04em; }
.text-link-light { color: var(--white); }
.repo-link[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }

.protocol-grid { display: grid; grid-template-columns: repeat(7, minmax(42px, 72px)); gap: 28px; align-content: center; justify-content: center; min-height: 376px; position: relative; }
.protocol-cell { aspect-ratio: 1; border: 1px solid var(--blue); position: relative; }
.protocol-cell::before { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: rgba(18,104,255,.38); top: 50%; left: 50%; transform: translate(-50%,-50%); }
.protocol-cell.active::before { background: var(--blue); width: 13px; height: 13px; }
.protocol-cell .trail { position: absolute; height: 1px; background: var(--blue); transform-origin: left center; opacity: .9; }
.hero-caption { color: var(--blue); margin: 20px auto 0; width: min(100%, 640px); }

.feature-mosaic { display: grid; grid-template-columns: 1fr .94fr 1fr; min-height: 190px; align-items: stretch; border-bottom: 1px solid var(--line); }
.feature { padding: 36px 42px; display: grid; grid-template-columns: 54px 1fr; gap: 12px; border-right: 1px solid var(--blue); }
.feature:last-child { border-right: 0; }
.feature-blue { background: var(--blue); color: var(--white); }
.feature-dark { background: var(--ink); }
.feature h2 { margin: 8px 0 10px; font-size: 27px; letter-spacing: -.03em; }
.feature p { margin: 0; max-width: 390px; font-size: 16px; line-height: 1.5; color: var(--white-72); }
.feature-blue p { color: var(--white); }
.feature .index { color: inherit; }
.feature-tall { transform: translateY(20px); position: relative; z-index: 2; border: 1px solid var(--blue); border-top: 0; border-bottom: 0; }

.thesis-grid { display: grid; grid-template-columns: .78fr 1.5fr; min-height: 760px; border-bottom: 1px solid var(--line); }
.thesis-statement { padding: 64px 52px; display: flex; flex-direction: column; justify-content: space-between; }
.thesis-statement h2 { margin: 18px 0 30px; font-size: clamp(52px, 5vw, 86px); line-height: .93; letter-spacing: -.065em; }
.thesis-statement h2 span { color: var(--ink); }
.thesis-points { display: grid; gap: 22px; border-top: 1px solid var(--ink); padding-top: 26px; }
.thesis-points p { margin: 0; font-size: 17px; }
.thesis-points strong { font-size: 13px; font-family: var(--mono); letter-spacing: .06em; }
.architecture { padding: 64px 60px; display: flex; flex-direction: column; justify-content: space-between; }
.section-heading h2 { font-size: clamp(42px, 4vw, 68px); line-height: .98; letter-spacing: -.055em; margin: 0 0 22px; }
.section-heading p:not(.eyebrow) { color: var(--white-72); max-width: 760px; font-size: 18px; line-height: 1.5; }
.section-heading.narrow { max-width: 940px; margin-bottom: 42px; }
.arch-diagram { margin-top: 48px; display: grid; grid-template-columns: 1fr 54px 1.12fr 54px 1fr; grid-template-rows: 170px 64px 170px; align-items: center; position: relative; }
.arch-box { border: 1px solid var(--white); min-height: 126px; padding: 26px 18px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.arch-box span { font-weight: 800; font-size: 15px; letter-spacing: .03em; }
.arch-box small { margin-top: 10px; font-size: 14px; color: var(--white-72); line-height: 1.35; }
.arch-core { border-color: var(--blue); }
.arch-arrow { color: var(--blue); text-align: center; font-size: 34px; }
.lower[data-box="recovery"] { grid-column: 1 / span 2; grid-row: 3; margin-right: 26px; }
.lower[data-box="policy"] { grid-column: 4 / span 2; grid-row: 3; margin-left: 26px; }
.connector { position: absolute; width: 1px; height: 94px; background: var(--blue); top: 160px; }
.connector.c1 { left: 42%; transform: rotate(28deg); transform-origin: top; }
.connector.c2 { right: 42%; transform: rotate(-28deg); transform-origin: top; }

.ops-section { padding: 92px 0 84px; border-bottom: 1px solid var(--line); }
.ops-grid { display: grid; grid-template-columns: 1.12fr .88fr .88fr 1.12fr .88fr; border: 1px solid var(--blue); }
.op { min-height: 250px; padding: 28px; border-right: 1px solid var(--blue); display: flex; flex-direction: column; justify-content: space-between; }
.op:last-child { border-right: 0; }
.op-blue { background: var(--blue); }
.op-dark { background: var(--ink); }
.op span { font: 800 18px var(--mono); letter-spacing: .08em; }
.op p { margin: 0; color: var(--white-72); font-size: 16px; line-height: 1.45; }
.op-blue p { color: var(--white); }

.move-section { display: grid; grid-template-columns: .78fr 1.5fr; min-height: 580px; border-bottom: 1px solid var(--line); }
.move-intro { padding: 64px 52px; display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--blue); }
.move-intro h2 { font-size: clamp(46px, 4vw, 70px); line-height: .95; letter-spacing: -.055em; margin: 0 0 24px; }
.move-intro > p:not(.eyebrow):not(.equation) { color: var(--white-72); font-size: 18px; }
.equation { font: 700 18px var(--mono); color: var(--blue); margin-top: 30px; }
.move-machine { padding: 60px 54px; display: flex; flex-direction: column; justify-content: center; }
.machine-track { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--white); }
.machine-step { min-height: 154px; border: 0; border-right: 1px solid var(--white); background: transparent; color: var(--white); text-align: left; padding: 20px; display: flex; flex-direction: column; gap: 8px; cursor: pointer; font-family: var(--sans); }
.machine-step:last-child { border-right: 0; }
.machine-step span { font: 700 11px var(--mono); }
.machine-step b { font-size: 14px; letter-spacing: -.01em; }
.machine-step small { margin-top: auto; font-size: 12px; }
.machine-step.is-active { background: var(--white); color: var(--blue); }
.machine-detail { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding-top: 30px; }
.machine-detail h3 { margin: 0 0 8px; font-size: 28px; }
.machine-detail p { margin: 0; font-size: 16px; max-width: 760px; }

.recovery-section { display: grid; grid-template-columns: .7fr 1.5fr; min-height: 560px; border-bottom: 1px solid var(--line); }
.recovery-heading { padding: 62px 50px; display: flex; flex-direction: column; justify-content: center; }
.recovery-heading h2 { font-size: clamp(52px, 4.8vw, 82px); line-height: .9; letter-spacing: -.065em; margin: 0 0 24px; }
.recovery-heading p:not(.eyebrow) { font-size: 18px; max-width: 520px; }
.recovery-console { padding: 54px; display: flex; flex-direction: column; justify-content: center; }
.recovery-tabs { display: grid; grid-template-columns: repeat(6, 1fr); border: 1px solid var(--blue); }
.recovery-tabs button { min-height: 64px; background: var(--ink); color: var(--white); border: 0; border-right: 1px solid var(--blue); font: 700 11px var(--mono); cursor: pointer; }
.recovery-tabs button:last-child { border-right: 0; }
.recovery-tabs button[aria-selected="true"] { background: var(--blue); color: var(--white); }
.profile-detail { display: grid; grid-template-columns: 1.3fr .95fr; gap: 50px; padding-top: 54px; }
.profile-detail h3 { font-size: 42px; letter-spacing: -.04em; margin: 0 0 16px; }
.profile-detail p:not(.eyebrow) { margin: 0; color: var(--white-72); font-size: 17px; line-height: 1.5; }
dl { margin: 0; border: 1px solid var(--blue); }
dl div { padding: 16px 18px; border-bottom: 1px solid var(--blue); }
dl div:last-child { border-bottom: 0; }
dt { color: var(--blue); font: 700 10px var(--mono); letter-spacing: .12em; }
dd { margin: 5px 0 0; font-size: 14px; }

.closure-section { display: grid; grid-template-columns: 1.42fr .78fr; min-height: 620px; border-bottom: 1px solid var(--line); }
.closure-visual { padding: 58px 54px; display: flex; flex-direction: column; justify-content: center; }
.closure-flow { display: grid; grid-template-columns: 1fr 42px 1.24fr 42px 1fr; grid-template-rows: 150px 50px 150px; gap: 0; align-items: center; margin-top: 30px; }
.closure-flow > span { text-align: center; color: var(--blue); font-size: 30px; }
.closure-node { border: 1px solid var(--white); min-height: 118px; padding: 18px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.closure-node b { font-size: 13px; letter-spacing: .03em; }
.closure-node small { margin-top: 8px; color: var(--white-72); font-size: 12px; }
.closure-main { border-color: var(--blue); }
.closure-down:nth-of-type(4) { grid-column: 1 / span 2; grid-row: 3; margin-right: 20px; }
.closure-down:nth-of-type(5) { grid-column: 4 / span 2; grid-row: 3; margin-left: 20px; }
.closure-copy { padding: 58px 46px; display: flex; flex-direction: column; justify-content: center; }
.closure-copy h2 { font-size: clamp(48px, 4.4vw, 74px); line-height: .93; letter-spacing: -.06em; margin: 0 0 32px; }
.closure-copy ol { margin: 0; padding: 0; list-style: none; display: grid; gap: 22px; }
.closure-copy li { padding-top: 18px; border-top: 1px solid var(--ink); font-size: 16px; line-height: 1.45; }

.freshness-section { padding: 88px 0; border-bottom: 1px solid var(--line); }
.freshness-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--blue); }
.freshness-grid article { min-height: 220px; padding: 28px; border-right: 1px solid var(--blue); }
.freshness-grid article:last-child { border-right: 0; }
.freshness-grid span { color: var(--blue); font: 700 13px var(--mono); }
.freshness-grid h3 { font-size: 24px; margin: 54px 0 8px; letter-spacing: -.03em; }
.freshness-grid p { margin: 0; color: var(--white-72); }

.uses-section { display: grid; grid-template-columns: .8fr 1.5fr; min-height: 490px; border-bottom: 1px solid var(--line); }
.uses-copy { padding: 58px 48px; display: flex; flex-direction: column; justify-content: center; }
.uses-copy h2 { margin: 0; font-size: clamp(48px, 4.2vw, 72px); line-height: .94; letter-spacing: -.06em; }
.uses-grid { display: grid; grid-template-columns: repeat(3,1fr); border-left: 1px solid var(--blue); }
.uses-grid article { padding: 34px; border-right: 1px solid var(--blue); border-bottom: 1px solid var(--blue); min-height: 180px; display: flex; flex-direction: column; justify-content: space-between; }
.uses-grid article:nth-child(3n) { border-right: 0; }
.uses-grid article:nth-last-child(-n+3) { border-bottom: 0; }
.uses-grid span { color: var(--blue); font: 700 11px var(--mono); }
.uses-grid h3 { margin: 0; font-size: 25px; letter-spacing: -.03em; }

.limits-section { display: grid; grid-template-columns: .63fr 1.5fr; min-height: 580px; border-bottom: 1px solid var(--line); }
.limits-title { padding: 58px 48px; display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--blue); }
.limits-title h2 { font-size: clamp(58px, 5vw, 88px); margin: 0 0 20px; letter-spacing: -.07em; }
.limits-title p:not(.eyebrow) { color: var(--white-72); font-size: 18px; }
.limits-list { padding: 38px 48px; display: flex; flex-direction: column; justify-content: center; }
.limits-list p { display: grid; grid-template-columns: 54px 1fr; gap: 14px; margin: 0; padding: 17px 0; border-bottom: 1px solid var(--ink); font-size: 17px; }
.limits-list p:last-child { border-bottom: 0; }
.limits-list span { font: 700 11px var(--mono); }

.build-section { padding: 88px 0 84px; border-bottom: 1px solid var(--line); }
.build-track { display: grid; grid-template-columns: repeat(5,1fr); border: 1px solid var(--blue); }
.build-track article { min-height: 260px; padding: 26px; border-right: 1px solid var(--blue); display: flex; flex-direction: column; }
.build-track article:last-child { border-right: 0; }
.build-track span { font: 700 12px var(--mono); color: var(--blue); }
.build-track h3 { margin: 52px 0 14px; font-size: 23px; letter-spacing: -.025em; }
.build-track p { margin: 0; color: var(--white-72); font-size: 14px; line-height: 1.48; }
.build-active { background: var(--blue); }
.build-active span, .build-active p { color: var(--white) !important; }

.faq-section { display: grid; grid-template-columns: .63fr 1.5fr; min-height: 660px; border-bottom: 1px solid var(--line); }
.faq-title { padding: 58px 48px; display: flex; flex-direction: column; justify-content: center; }
.faq-title h2 { font-size: clamp(58px, 5.6vw, 96px); line-height: .83; letter-spacing: -.07em; margin: 0 0 28px; }
.faq-title h2 span { color: var(--ink); }
.faq-title p:not(.eyebrow) { font-size: 18px; max-width: 360px; }
.faq-list { padding: 34px 48px; display: flex; flex-direction: column; justify-content: center; }
details { border-bottom: 1px solid var(--blue); padding: 19px 0; }
summary { cursor: pointer; display: grid; grid-template-columns: 54px 1fr 24px; gap: 14px; align-items: start; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--blue); font: 700 22px/1 var(--mono); }
details[open] summary::after { content: "−"; }
summary span { color: var(--blue); font: 700 11px var(--mono); }
summary b { font-size: 18px; font-weight: 600; }
details p { color: var(--white-72); margin: 12px 38px 0 68px; max-width: 850px; font-size: 15px; line-height: 1.48; }

.final-cta { min-height: 380px; padding: 56px 52px; display: grid; grid-template-columns: 1.35fr .65fr; align-items: end; }
.final-cta h2 { font-size: clamp(52px, 5vw, 84px); line-height: .91; letter-spacing: -.065em; margin: 0; }
.final-actions { justify-self: end; align-self: end; min-width: 300px; display: grid; gap: 10px; }

.footer { width: min(calc(100% - 72px), var(--max)); margin: 0 auto; min-height: 86px; display: flex; align-items: center; justify-content: space-between; color: var(--blue); font-family: var(--mono); }
.footer-brand, .footer-links { display: flex; align-items: center; gap: 24px; }
.footer-brand strong { font-size: 22px; letter-spacing: .2em; }
.footer-brand span, .footer-links > span { width: 1px; height: 30px; background: var(--blue); }
.footer small, .footer a { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; text-decoration: none; }

@media (max-width: 1120px) {
  .site-header, main, .footer { width: min(calc(100% - 36px), var(--max)); }
  .nav { display: none; }
  .menu-toggle { display: block; border: 1px solid var(--blue); background: transparent; color: var(--blue); font: 700 11px var(--mono); padding: 10px 14px; }
  .mobile-nav { position: fixed; z-index: 100; top: 76px; left: 18px; right: 18px; background: var(--ink); border: 1px solid var(--blue); padding: 18px; }
  .mobile-nav.is-open { display: grid; gap: 16px; }
  .mobile-nav a { text-decoration: none; font: 700 12px var(--mono); text-transform: uppercase; }
  .hero { grid-template-columns: 1fr; }
  .hero-diagram { min-height: 530px; }
  .hero-copy { min-height: 540px; }
  .feature-mosaic { grid-template-columns: 1fr; }
  .feature, .feature:last-child { border-right: 0; border-bottom: 1px solid var(--blue); }
  .feature-tall { transform: none; border-left: 0; border-right: 0; }
  .thesis-grid, .move-section, .recovery-section, .closure-section, .uses-section, .limits-section, .faq-section { grid-template-columns: 1fr; }
  .architecture, .move-intro, .uses-grid, .limits-title { border-right: 0; border-left: 0; }
  .ops-grid { grid-template-columns: repeat(2,1fr); }
  .op { border-bottom: 1px solid var(--blue); }
  .op:nth-child(2n) { border-right: 0; }
  .op:last-child { grid-column: 1 / -1; border-bottom: 0; }
  .machine-track { grid-template-columns: 1fr; }
  .machine-step { min-height: 82px; border-right: 0; border-bottom: 1px solid var(--white); }
  .machine-step:last-child { border-bottom: 0; }
  .recovery-tabs { grid-template-columns: repeat(3,1fr); }
  .recovery-tabs button:nth-child(3) { border-right: 0; }
  .recovery-tabs button:nth-child(-n+3) { border-bottom: 1px solid var(--blue); }
  .profile-detail { grid-template-columns: 1fr; }
  .freshness-grid { grid-template-columns: repeat(2,1fr); }
  .freshness-grid article:nth-child(2) { border-right: 0; }
  .freshness-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--blue); }
  .build-track { grid-template-columns: repeat(2,1fr); }
  .build-track article { border-bottom: 1px solid var(--blue); }
  .build-track article:nth-child(2n) { border-right: 0; }
  .build-track article:last-child { grid-column: 1 / -1; border-bottom: 0; }
}

@media (max-width: 720px) {
  .site-header, main, .footer { width: min(calc(100% - 24px), var(--max)); }
  .site-header { height: 64px; }
  .mobile-nav { top: 64px; left: 12px; right: 12px; }
  .hero-diagram, .hero-copy, .architecture, .thesis-statement, .move-intro, .move-machine, .recovery-heading, .recovery-console, .closure-visual, .closure-copy, .uses-copy, .limits-title, .limits-list, .faq-title, .faq-list, .final-cta { padding-left: 24px; padding-right: 24px; }
  .protocol-grid { grid-template-columns: repeat(7, minmax(28px, 1fr)); gap: 12px; min-height: 300px; }
  .hero-actions { grid-template-columns: 1fr; }
  .feature { padding: 28px 22px; grid-template-columns: 44px 1fr; }
  .arch-diagram { grid-template-columns: 1fr; grid-template-rows: auto; gap: 14px; }
  .arch-arrow, .connector { display: none; }
  .lower[data-box="recovery"], .lower[data-box="policy"] { grid-column: auto; grid-row: auto; margin: 0; }
  .ops-grid, .freshness-grid, .build-track, .uses-grid { grid-template-columns: 1fr; }
  .op, .op:nth-child(2n), .op:last-child, .freshness-grid article, .freshness-grid article:nth-child(2), .build-track article, .build-track article:nth-child(2n), .build-track article:last-child, .uses-grid article { grid-column: auto; border-right: 0; border-bottom: 1px solid var(--blue); }
  .ops-grid > :last-child, .freshness-grid > :last-child, .build-track > :last-child, .uses-grid > :last-child { border-bottom: 0; }
  .recovery-tabs { grid-template-columns: repeat(2,1fr); }
  .recovery-tabs button { border-right: 1px solid var(--blue) !important; border-bottom: 1px solid var(--blue); }
  .recovery-tabs button:nth-child(2n) { border-right: 0 !important; }
  .recovery-tabs button:nth-last-child(-n+2) { border-bottom: 0; }
  .closure-flow { grid-template-columns: 1fr; grid-template-rows: auto; gap: 12px; }
  .closure-flow > span { transform: rotate(90deg); }
  .closure-down:nth-of-type(4), .closure-down:nth-of-type(5) { grid-column: auto; grid-row: auto; margin: 0; }
  .final-cta { grid-template-columns: 1fr; align-items: start; gap: 40px; }
  .final-actions { justify-self: stretch; min-width: 0; }
  .footer { flex-direction: column; align-items: flex-start; gap: 22px; padding: 26px 0; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}