:root {
  color-scheme: dark;
  --ink: #080b0e;
  --ink-raised: #0d1115;
  --ink-soft: #12171c;
  --paper: #edf0ec;
  --paper-muted: #adb5b0;
  --line: rgba(237, 240, 236, 0.14);
  --line-strong: rgba(237, 240, 236, 0.28);
  --signal: #ff6a2a;
  --signal-soft: rgba(255, 106, 42, 0.14);
  --success: #76ddb2;
  --max: 1440px;
  --gutter: clamp(20px, 4vw, 64px);
  --radius-sm: 3px;
  --font-sans: "Segoe UI", Arial, Helvetica, sans-serif;
  --font-mono: "Cascadia Mono", "IBM Plex Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--ink);
  background: var(--paper);
  transform: translateY(-160%);
}

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

.site-header {
  position: relative;
  z-index: 10;
  max-width: var(--max);
  min-height: 74px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: max-content;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.brand-mark { width: 22px; height: 22px; fill: var(--signal); }

.site-nav { display: flex; gap: clamp(20px, 3vw, 46px); }

.site-nav a,
.header-cta {
  color: var(--paper-muted);
  font-size: 13px;
  text-decoration: none;
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible { color: var(--paper); }

.header-cta {
  justify-self: end;
  padding: 11px 15px;
  border: 1px solid var(--line-strong);
  color: var(--paper);
}

.header-cta:hover,
.header-cta:focus-visible { border-color: var(--signal); }

.hero {
  position: relative;
  max-width: var(--max);
  min-height: calc(100vh - 74px);
  margin: 0 auto;
  padding: clamp(56px, 7vw, 104px) var(--gutter) clamp(64px, 7vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  gap: clamp(48px, 7vw, 108px);
  align-items: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 var(--gutter) auto;
  height: 1px;
  background: linear-gradient(90deg, var(--signal) 0 9%, transparent 9% 100%);
  opacity: 0.6;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 28px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow span + span {
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
  color: var(--paper-muted);
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(48px, 5.2vw, 82px);
  font-weight: 620;
  letter-spacing: -0.058em;
  line-height: 0.98;
}

h1 em {
  display: block;
  margin-top: 0.12em;
  color: var(--signal);
  font-style: normal;
}

.hero-lead {
  max-width: 650px;
  margin: 28px 0 0;
  color: var(--paper-muted);
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.6;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.button {
  min-height: 48px;
  padding: 13px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.button-primary { background: var(--signal); color: var(--ink); }
.button-primary:hover,
.button-primary:focus-visible { background: #ff8150; }

.button-secondary { border-color: var(--line-strong); color: var(--paper); }
.button-secondary:hover,
.button-secondary:focus-visible { border-color: var(--paper-muted); }

.trust-line {
  margin: clamp(46px, 6vw, 76px) 0 0;
  padding: 18px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  border-top: 1px solid var(--line);
}

.trust-line div { display: flex; gap: 9px; align-items: baseline; }
.trust-line dt { color: var(--signal); font: 10px/1 var(--font-mono); }
.trust-line dd { margin: 0; color: var(--paper-muted); font-size: 11px; letter-spacing: 0.04em; }

.system-map {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--ink-raised);
  box-shadow: 24px 32px 80px rgba(0, 0, 0, 0.3);
}

.map-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.26;
  mask-image: linear-gradient(to bottom, black 0%, transparent 92%);
}

.map-head {
  position: relative;
  z-index: 2;
  min-height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  color: var(--paper-muted);
  font: 9px/1 var(--font-mono);
  letter-spacing: 0.1em;
}

.map-head span:last-child { color: var(--success); }

.map-inputs {
  position: absolute;
  top: 94px;
  left: 22px;
  display: flex;
  flex-direction: column;
  gap: 27px;
  color: var(--paper-muted);
  font: 8px/1 var(--font-mono);
  letter-spacing: 0.12em;
}

.map-inputs span::after {
  content: "";
  display: inline-block;
  width: 34px;
  height: 1px;
  margin-left: 9px;
  vertical-align: middle;
  background: var(--line-strong);
}

.map-core {
  position: relative;
  z-index: 2;
  width: calc(100% - 142px);
  margin: 54px 28px 38px auto;
  padding: 26px 28px 24px;
  border-left: 3px solid var(--signal);
  background: rgba(8, 11, 14, 0.88);
}

.map-core p,
.route-status,
.map-note {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.map-core p { margin: 0 0 14px; color: var(--signal); }
.map-core h2 { max-width: 500px; margin: 0; font-size: clamp(24px, 2.4vw, 36px); line-height: 1.08; letter-spacing: -0.035em; }
.map-core ul { margin: 20px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.map-core li { padding: 7px 9px; border: 1px solid var(--line); color: var(--paper-muted); font: 9px/1 var(--font-mono); text-transform: uppercase; }

.map-routes { position: relative; z-index: 2; display: grid; gap: 10px; padding: 0 28px 26px 86px; }

.route {
  position: relative;
  min-height: 102px;
  padding: 16px 50px 15px 18px;
  display: grid;
  grid-template-columns: 118px 1fr;
  align-items: center;
  column-gap: 16px;
  border: 1px solid var(--line);
  background: rgba(13, 17, 21, 0.92);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.route:hover,
.route:focus-visible {
  border-color: var(--signal);
  background: #11161b;
  transform: translateX(4px);
  outline: none;
}

.route-status { grid-row: 1 / span 2; color: var(--paper-muted); }
.route strong { font-size: 18px; letter-spacing: -0.02em; }
.route small { margin-top: 4px; color: var(--paper-muted); font-size: 12px; }
.route-arrow { position: absolute; right: 18px; top: 50%; color: var(--signal); transform: translateY(-50%); }

.map-line {
  position: absolute;
  z-index: 1;
  left: 48px;
  width: 37px;
  border-top: 1px solid var(--signal);
}

.map-line::before {
  content: "";
  position: absolute;
  left: -3px;
  top: -3px;
  width: 5px;
  height: 5px;
  background: var(--signal);
  box-shadow: 0 0 0 5px var(--signal-soft);
}

.map-line-a { top: 354px; }
.map-line-b { top: 466px; }
.map-line-c { top: 578px; }

.map-note { position: relative; z-index: 2; margin: 2px 28px 22px 86px; color: var(--paper-muted); line-height: 1.5; }

.proof-strip {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(64px, 8vw, 116px) var(--gutter);
  display: grid;
  grid-template-columns: 0.5fr 1.2fr 1fr;
  gap: clamp(32px, 6vw, 90px);
  color: #11161a;
  background: var(--paper);
}

.proof-index { display: flex; gap: 16px; align-items: flex-start; color: #69716d; font: 10px/1.3 var(--font-mono); }
.proof-index-line { flex: 1; height: 1px; margin-top: 6px; background: rgba(17, 22, 26, 0.28); }
.proof-statement h2 { margin: 0; font-size: clamp(32px, 4vw, 58px); line-height: 1.02; letter-spacing: -0.05em; }
.proof-statement p { max-width: 600px; margin: 26px 0 0; color: #565f5a; font-size: 17px; line-height: 1.65; }
.proof-facts { display: grid; align-content: start; border-top: 1px solid rgba(17, 22, 26, 0.25); }
.proof-facts div { padding: 18px 0; display: grid; grid-template-columns: 70px 1fr; gap: 16px; border-bottom: 1px solid rgba(17, 22, 26, 0.16); }
.proof-facts span { color: #b54d21; font: 9px/1.4 var(--font-mono); }
.proof-facts strong { font-size: 13px; font-weight: 600; }

.capabilities,
.product-tracks,
.method,
.boundaries,
.faq,
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
}

.capabilities,
.method,
.faq {
  padding: clamp(72px, 9vw, 132px) var(--gutter);
  background: var(--paper);
  color: #11161a;
}

.section-kicker {
  padding-bottom: 18px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid rgba(17, 22, 26, 0.25);
  color: #6b746f;
  font: 9px/1.4 var(--font-mono);
  letter-spacing: 0.08em;
}

.section-kicker span:first-child { color: #b54d21; }

.section-heading {
  margin: clamp(36px, 5vw, 72px) 0 clamp(42px, 6vw, 84px);
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(40px, 8vw, 130px);
  align-items: end;
}

.section-heading h2,
.method-intro h2,
.boundaries-copy h2,
.faq-layout > h2,
.contact-intro h2 {
  margin: 0;
  font-size: clamp(38px, 5.1vw, 72px);
  line-height: 1;
  letter-spacing: -0.055em;
}

.section-heading p,
.method-intro p,
.boundaries-copy p,
.contact-intro p {
  margin: 0;
  color: #5a635e;
  font-size: 16px;
  line-height: 1.65;
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(17, 22, 26, 0.25);
  border-bottom: 1px solid rgba(17, 22, 26, 0.25);
}

.capability-list article { padding: 32px clamp(22px, 3vw, 42px) 34px 0; }
.capability-list article + article { padding-left: clamp(22px, 3vw, 42px); border-left: 1px solid rgba(17, 22, 26, 0.18); }
.capability-code { color: #b54d21; font: 9px/1.4 var(--font-mono); letter-spacing: 0.08em; }
.capability-list h3 { min-height: 2.2em; margin: 28px 0 16px; font-size: clamp(22px, 2.1vw, 31px); line-height: 1.08; letter-spacing: -0.035em; }
.capability-list p { margin: 0; color: #5a635e; font-size: 14px; line-height: 1.65; }
.capability-list ul { margin: 28px 0 0; padding: 0; list-style: none; }
.capability-list li { padding: 9px 0; border-top: 1px solid rgba(17, 22, 26, 0.13); font: 10px/1.4 var(--font-mono); text-transform: uppercase; }

.product-tracks { padding: clamp(72px, 9vw, 132px) var(--gutter); }
.product-tracks .section-kicker { border-color: var(--line); color: var(--paper-muted); }
.section-heading--dark p { color: var(--paper-muted); }

.track-ledger { border-top: 1px solid var(--line-strong); }
.track-row {
  min-height: 132px;
  padding: 24px 0;
  display: grid;
  grid-template-columns: 52px 150px minmax(190px, 0.75fr) minmax(260px, 1.25fr) 80px;
  gap: clamp(12px, 2.4vw, 38px);
  align-items: center;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: color 160ms ease, background 160ms ease, padding 160ms ease;
}

.track-row:hover,
.track-row:focus-visible { padding-inline: 16px; background: var(--ink-soft); outline: none; }
.track-number { color: var(--signal); font: 10px/1 var(--font-mono); }
.track-state { color: var(--success); font: 8px/1.4 var(--font-mono); letter-spacing: 0.08em; }
.track-name { font-size: clamp(20px, 2.2vw, 30px); font-weight: 650; letter-spacing: -0.03em; }
.track-description { color: var(--paper-muted); font-size: 14px; line-height: 1.55; }
.track-link { justify-self: end; font: 10px/1 var(--font-mono); text-transform: uppercase; }
.track-link b { color: var(--signal); }

.method { border-bottom: 1px solid rgba(17, 22, 26, 0.18); }
.method-layout { margin-top: clamp(40px, 6vw, 80px); display: grid; grid-template-columns: 0.82fr 1.18fr; gap: clamp(50px, 9vw, 150px); }
.method-intro { align-self: start; position: sticky; top: 32px; }
.method-intro h2 { font-size: clamp(38px, 4.8vw, 66px); }
.method-intro p { max-width: 560px; margin-top: 28px; }
.method-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(17, 22, 26, 0.25); }
.method-steps li { min-height: 138px; padding: 24px 0; display: grid; grid-template-columns: 46px 1fr 86px; gap: 20px; align-items: start; border-bottom: 1px solid rgba(17, 22, 26, 0.18); }
.method-steps li > span { color: #b54d21; font: 10px/1.4 var(--font-mono); }
.method-steps h3 { margin: 0 0 9px; font-size: 20px; letter-spacing: -0.025em; }
.method-steps p { margin: 0; color: #5a635e; font-size: 13px; line-height: 1.55; }
.method-steps strong { justify-self: end; color: #727b76; font: 8px/1.4 var(--font-mono); }

.boundaries {
  padding: clamp(72px, 9vw, 132px) var(--gutter);
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(48px, 10vw, 160px);
  align-items: center;
}

.boundaries-copy h2 { margin-top: 24px; }
.boundaries-copy p { margin-top: 26px; color: var(--paper-muted); }
.boundary-record { margin: 0; border-top: 1px solid var(--line-strong); }
.boundary-record div { padding: 20px 0; display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 24px; border-bottom: 1px solid var(--line); }
.boundary-record dt { color: var(--paper-muted); font-size: 12px; }
.boundary-record dd { margin: 0; font: 11px/1.5 var(--font-mono); text-transform: uppercase; }

.faq-layout { margin-top: clamp(40px, 6vw, 80px); display: grid; grid-template-columns: 0.75fr 1.25fr; gap: clamp(50px, 9vw, 150px); }
.faq-layout > h2 { font-size: clamp(36px, 4.2vw, 60px); }
.faq-list { border-top: 1px solid rgba(17, 22, 26, 0.25); }
.faq-list details { border-bottom: 1px solid rgba(17, 22, 26, 0.18); }
.faq-list summary { min-height: 68px; padding: 20px 42px 20px 0; display: flex; align-items: center; position: relative; cursor: pointer; font-size: 17px; font-weight: 650; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; color: #b54d21; font: 20px/1 var(--font-mono); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { margin: -4px 0 24px; max-width: 720px; color: #5a635e; font-size: 14px; line-height: 1.65; }

.contact-intro {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(72px, 9vw, 132px) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: end;
  gap: clamp(48px, 10vw, 160px);
  border-top: 1px solid var(--line);
}

.contact-intro h2 { margin-top: 24px; }
.contact-intro p { max-width: 720px; margin-top: 28px; color: var(--paper-muted); }
.contact-intro > a { min-height: 76px; padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; background: var(--signal); color: var(--ink); font-size: 17px; font-weight: 700; text-decoration: none; }
.contact-intro > a:hover,
.contact-intro > a:focus-visible { background: #ff8150; }

.site-footer { min-height: 164px; padding: 34px var(--gutter); display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: start; border-top: 1px solid var(--line); color: var(--paper-muted); }
.site-footer > div { display: grid; gap: 8px; }
.site-footer strong { color: var(--paper); font: 12px/1 var(--font-mono); letter-spacing: 0.16em; }
.site-footer span,
.site-footer a,
.site-footer p { font-size: 11px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 24px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover,
.site-footer a:focus-visible { color: var(--paper); }
.site-footer p { grid-column: 1 / -1; margin: 18px 0 0; }

:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; }

@media (max-width: 1080px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: 830px; }
  .system-map { min-height: 620px; }
  .proof-strip { grid-template-columns: 0.35fr 1fr; }
  .proof-facts { grid-column: 2; }
  .section-heading { grid-template-columns: 1fr; gap: 24px; }
  .track-row { grid-template-columns: 42px 120px minmax(180px, 0.8fr) minmax(240px, 1.2fr) 70px; }
  .method-layout,
  .boundaries,
  .faq-layout { grid-template-columns: 1fr; }
  .method-intro { position: static; }
}

@media (max-width: 620px) {
  .site-header { min-height: 64px; padding: 0 18px; }
  .header-cta { padding: 9px 11px; font-size: 11px; }
  .brand { font-size: 11px; }
  .brand-mark { width: 19px; }
  .hero { min-height: auto; padding: 48px 18px 64px; gap: 48px; }
  .hero::before { inset-inline: 18px; }
  .eyebrow { margin-bottom: 22px; font-size: 9px; }
  h1 { font-size: clamp(42px, 13vw, 57px); letter-spacing: -0.055em; }
  .hero-lead { margin-top: 24px; font-size: 16px; line-height: 1.55; }
  .hero-actions { display: grid; }
  .button { width: 100%; justify-content: space-between; }
  .trust-line { grid-template-columns: 1fr; gap: 10px; margin-top: 40px; }
  .system-map { min-height: 716px; }
  .map-head { padding-inline: 12px; }
  .map-head span:last-child { display: none; }
  .map-inputs { display: none; }
  .map-core { width: auto; margin: 34px 14px 28px; padding: 22px 18px; }
  .map-core h2 { font-size: 28px; }
  .map-core ul { display: grid; grid-template-columns: 1fr; }
  .map-routes { padding: 0 14px 18px; }
  .route { min-height: 116px; grid-template-columns: 1fr; align-content: center; row-gap: 6px; }
  .route-status { grid-row: auto; }
  .route small { padding-right: 18px; }
  .map-line { display: none; }
  .map-note { margin: 0 14px 20px; font-size: 8px; }
  .proof-strip { padding: 62px 18px; grid-template-columns: 1fr; gap: 30px; }
  .proof-index { max-width: 150px; }
  .proof-facts { grid-column: auto; }
  .capabilities,
  .product-tracks,
  .method,
  .boundaries,
  .faq,
  .contact-intro { padding: 62px 18px; }
  .section-kicker span:last-child { display: none; }
  .section-heading { margin: 34px 0 44px; }
  .section-heading h2,
  .method-intro h2,
  .boundaries-copy h2,
  .faq-layout > h2,
  .contact-intro h2 { font-size: 38px; }
  .capability-list { grid-template-columns: 1fr; }
  .capability-list article { padding: 28px 0; }
  .capability-list article + article { padding-left: 0; border-left: 0; border-top: 1px solid rgba(17, 22, 26, 0.18); }
  .capability-list h3 { min-height: 0; }
  .track-row { padding: 26px 0; grid-template-columns: 34px 1fr 24px; gap: 8px 14px; }
  .track-number { grid-row: 1 / span 3; }
  .track-state { grid-column: 2; }
  .track-name { grid-column: 2; }
  .track-description { grid-column: 2; }
  .track-link { grid-column: 3; grid-row: 1 / span 3; font-size: 0; }
  .track-link b { font-size: 16px; }
  .method-layout,
  .faq-layout { margin-top: 34px; gap: 40px; }
  .method-steps li { grid-template-columns: 34px 1fr; }
  .method-steps strong { display: none; }
  .boundary-record div { grid-template-columns: 1fr; gap: 8px; }
  .contact-intro { grid-template-columns: 1fr; gap: 36px; }
  .site-footer { padding: 34px 18px; grid-template-columns: 1fr; }
  .site-footer nav { gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}