:root {
  --ink: #0a0e10;
  --ink-soft: #151b1e;
  --ink-raised: #1c2428;
  --paper: #f4f5f2;
  --white: #ffffff;
  --line: #d9ddda;
  --muted: #5b6468;
  --cyan: #43d6e5;
  --cyan-dark: #086875;
  --cyan-pale: #d8f5f5;
  --signal: #d64545;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.55; letter-spacing: 0; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 14px; color: var(--ink); background: var(--white); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; }

.site-header { position: absolute; z-index: 10; top: 0; right: 0; left: 0; color: var(--white); border-bottom: 1px solid rgba(255,255,255,.14); }
.page-header { color: var(--white); background: var(--ink); border-bottom: 1px solid rgba(255,255,255,.14); }
.nav { max-width: var(--container); min-height: 82px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 42px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 17px; font-weight: 760; text-decoration: none; white-space: nowrap; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid currentColor; font-size: 11px; font-weight: 850; }
.nav-links { display: flex; align-items: center; gap: 28px; margin-left: auto; font-size: 14px; }
.nav-links a, .footer-links a { text-decoration: none; }
.nav-links a:hover, .footer-links a:hover, .nav-links a[aria-current="page"] { text-decoration: underline; text-underline-offset: 5px; }
.nav-cta { min-height: 42px; padding: 0 17px; display: inline-flex; align-items: center; justify-content: center; color: var(--ink); background: var(--cyan); font-size: 14px; font-weight: 820; text-decoration: none; }

.hero { position: relative; min-height: 760px; display: flex; align-items: center; overflow: hidden; color: var(--white); background: var(--ink) url("assets/hero-v2.webp") center / cover no-repeat; }
.hero-shade { position: absolute; inset: 0; background: rgba(5,8,10,.58); }
.hero-content { position: relative; z-index: 2; width: 100%; max-width: var(--container); margin: 0 auto; padding: 140px 24px 76px; }
.eyebrow, .kicker { margin: 0 0 18px; color: var(--cyan-dark); font-size: 12px; font-weight: 850; text-transform: uppercase; }
.eyebrow { color: var(--cyan); }
.eyebrow span { width: 7px; height: 7px; display: inline-block; margin-right: 8px; background: var(--signal); }
h1, h2, h3, p { overflow-wrap: break-word; }
h1 { max-width: 880px; margin: 0; font-size: 72px; line-height: 1.01; font-weight: 770; }
.hero-copy { max-width: 660px; margin: 26px 0 0; color: rgba(255,255,255,.82); font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { min-height: 52px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; gap: 22px; border: 1px solid transparent; font-weight: 820; text-decoration: none; }
.button-primary { color: #041012; background: var(--cyan); }
.button-primary:hover, .nav-cta:hover, .mobile-cta a:hover { background: #79e6f0; }
.button-quiet { color: var(--white); border-color: rgba(255,255,255,.5); background: rgba(5,8,10,.42); }
.button-quiet:hover { border-color: var(--white); }
.route-note { max-width: 680px; margin: 17px 0 0; color: rgba(255,255,255,.62); font-size: 13px; }
.hero-index { position: absolute; z-index: 2; right: 28px; bottom: 24px; display: flex; align-items: center; gap: 15px; color: rgba(255,255,255,.56); font: 11px ui-monospace, SFMono-Regular, Menlo, monospace; }
.hero-index span:first-child { color: var(--cyan); font-size: 24px; }

.signal-band { color: var(--white); background: var(--ink-soft); }
.signal-inner { max-width: var(--container); margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: repeat(3, 1fr); }
.signal-inner div { min-height: 112px; padding: 24px 30px; display: flex; flex-direction: column; justify-content: center; border-left: 1px solid rgba(255,255,255,.12); }
.signal-inner div:last-child { border-right: 1px solid rgba(255,255,255,.12); }
.signal-inner strong { font-size: 15px; }
.signal-inner span { margin-top: 4px; color: rgba(255,255,255,.62); font-size: 13px; }

.product-section { max-width: var(--container); margin: 0 auto; padding: 108px 24px; display: grid; grid-template-columns: .78fr 1.22fr; gap: 76px; align-items: center; }
.product-copy h2, .section-intro h2, .method-heading h2, .closing-cta h2, .checklist-section h2 { margin: 0; font-size: 48px; line-height: 1.06; }
.product-copy > p:not(.kicker), .section-intro > p:not(.kicker), .method-heading > p:not(.kicker), .closing-cta p, .checklist-section p { color: var(--muted); }
.plain-list { margin: 28px 0; padding-left: 22px; list-style: square; border-top: 1px solid var(--line); }
.plain-list li { padding: 11px 0; border-bottom: 1px solid var(--line); }
.text-link { color: var(--cyan-dark); font-weight: 800; text-underline-offset: 5px; }
.text-link-light { color: var(--cyan); }

.route-panel { color: var(--white); background: var(--ink-soft); border: 1px solid #303a3f; border-radius: 4px; box-shadow: 0 28px 60px rgba(10,14,16,.16); overflow: hidden; }
.route-toolbar { min-height: 48px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; color: rgba(255,255,255,.56); border-bottom: 1px solid rgba(255,255,255,.12); font: 11px ui-monospace, SFMono-Regular, Menlo, monospace; }
.route-steps { margin: 0; padding: 0; list-style: none; }
.route-steps li { min-height: 104px; padding: 20px 22px; display: grid; grid-template-columns: 46px 1fr; gap: 14px; align-items: center; border-bottom: 1px solid rgba(255,255,255,.1); }
.route-steps li > span { color: var(--cyan); font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.route-steps div { display: grid; gap: 5px; }
.route-steps small { color: rgba(255,255,255,.58); font-size: 13px; }
.route-action { min-height: 58px; padding: 0 22px; display: flex; align-items: center; justify-content: space-between; color: var(--ink); background: var(--cyan); font-weight: 820; text-decoration: none; }
.route-action:hover { background: #79e6f0; }

.use-cases { padding: 106px max(24px, calc((100% - var(--container)) / 2)); background: var(--white); }
.section-intro { max-width: 820px; }
.case-list { margin-top: 58px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.case-list article { min-height: 280px; padding: 28px; border-left: 1px solid var(--line); }
.case-list article:last-child { border-right: 1px solid var(--line); }
.case-list span, .principles article > span { color: var(--cyan-dark); font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.case-list h3 { margin: 86px 0 14px; font-size: 24px; }
.case-list p { margin: 0; color: var(--muted); }

.method-band { color: var(--white); background: var(--ink); }
.method-inner { max-width: var(--container); margin: 0 auto; padding: 106px 24px; display: grid; grid-template-columns: .85fr 1.15fr; gap: 76px; }
.method-heading .kicker, .closing-cta .kicker { color: var(--cyan); }
.method-heading h2 { color: var(--white); }
.method-steps { margin: 0 0 34px; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.16); }
.method-steps li { min-height: 116px; padding: 22px 0; display: grid; grid-template-columns: 58px 1fr; align-items: center; border-bottom: 1px solid rgba(255,255,255,.16); }
.method-steps li > span { color: var(--cyan); font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; }
.method-steps p { margin: 5px 0 0; color: rgba(255,255,255,.62); }

.faq-section { max-width: var(--container); margin: 0 auto; padding: 104px 24px; display: grid; grid-template-columns: .72fr 1.28fr; gap: 84px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { padding: 23px 0; border-bottom: 1px solid var(--line); }
.faq-list summary { cursor: pointer; font-size: 18px; font-weight: 780; }
.faq-list p { max-width: 680px; margin: 13px 0 0; color: var(--muted); }
.closing-cta { max-width: var(--container); margin: 0 auto 104px; padding: 48px; display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: center; color: var(--white); background: var(--ink-soft); }
.closing-cta p { max-width: 690px; color: rgba(255,255,255,.62); }

.footer { color: var(--white); background: var(--ink); }
.footer-inner { max-width: var(--container); min-height: 188px; margin: 0 auto; padding: 38px 24px; display: grid; grid-template-columns: 1fr auto auto; gap: 48px; align-items: center; }
.footer-brand { color: var(--white); }
.footer p { margin: 12px 0 0; color: rgba(255,255,255,.55); font-size: 14px; }
.footer-links { display: flex; gap: 24px; color: rgba(255,255,255,.72); font-size: 13px; }
.footer-inner > span { color: rgba(255,255,255,.5); font-size: 13px; }
.compact-footer .footer-inner { min-height: 126px; }
.mobile-cta { display: none; }

.inner-page { background: var(--paper); }
.page-intro { max-width: var(--container); margin: 0 auto; padding: 96px 24px 80px; }
.page-intro h1 { max-width: 980px; color: var(--ink); font-size: 68px; }
.page-intro > p:last-child { max-width: 760px; margin: 28px 0 0; color: var(--muted); font-size: 19px; }
.method-intro { padding-bottom: 96px; }

.principles { max-width: var(--container); margin: 0 auto 104px; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.principles article { min-height: 320px; padding: 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principles h2 { max-width: 440px; margin: 86px 0 14px; font-size: 30px; line-height: 1.12; }
.principles p { max-width: 480px; margin: 0; color: var(--muted); }
.verification-flow { color: var(--white); background: var(--ink); padding: 104px max(24px, calc((100% - var(--container)) / 2)); }
.verification-flow .section-intro h2 { color: var(--white); }
.verification-flow .kicker { color: var(--cyan); }
.verification-flow ol { margin: 56px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.16); }
.verification-flow li { min-height: 124px; display: grid; grid-template-columns: 96px 1fr; align-items: center; border-bottom: 1px solid rgba(255,255,255,.16); }
.verification-flow li > span { color: var(--cyan); font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; }
.verification-flow h3 { margin: 0; font-size: 23px; }
.verification-flow p { margin: 5px 0 0; color: rgba(255,255,255,.62); }
.checklist-section { max-width: var(--container); margin: 0 auto; padding: 104px 24px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.checklist { margin: 0; padding-left: 22px; list-style: square; border-top: 1px solid var(--line); }
.checklist li { min-height: 58px; padding: 16px 10px; border-bottom: 1px solid var(--line); }

.policy-page { min-height: 100vh; color: var(--white); background: var(--ink); }
.policy-shell { max-width: var(--container); margin: 0 auto; padding: 92px 24px 110px; }
.policy-shell h1 { max-width: 860px; font-size: 68px; }
.policy-lead { max-width: 720px; margin: 28px 0 0; color: rgba(255,255,255,.68); font-size: 19px; }
.policy-grid { margin-top: 62px; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.16); }
.policy-card { min-height: 280px; padding: 30px; background: var(--ink-soft); }
.policy-card-wide { grid-column: 1 / -1; min-height: 0; }
.policy-card > span { color: var(--cyan); font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; }
.policy-card h2 { margin: 70px 0 14px; font-size: 25px; }
.policy-card-wide h2 { margin-top: 34px; }
.policy-card p { max-width: 820px; margin: 0 0 14px; color: rgba(255,255,255,.66); }
.policy-card a { color: var(--cyan); }
.policy-footer { max-width: var(--container); min-height: 100px; margin: 0 auto; padding: 24px; display: flex; align-items: center; justify-content: space-between; color: rgba(255,255,255,.54); border-top: 1px solid rgba(255,255,255,.16); font-size: 13px; }
.policy-footer a { color: rgba(255,255,255,.76); text-underline-offset: 4px; }

@media (max-width: 980px) {
  h1 { font-size: 60px; }
  .product-section, .method-inner { grid-template-columns: 1fr; gap: 54px; }
  .product-copy { max-width: 760px; }
  .case-list { grid-template-columns: 1fr; }
  .case-list article { min-height: 210px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .case-list article:last-child { border-bottom: 0; }
  .case-list h3 { margin-top: 54px; }
  .faq-section { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 820px) {
  body:not(.policy-page) { padding-bottom: 72px; }
  .nav { min-height: 112px; padding: 14px 18px 10px; flex-wrap: wrap; gap: 8px 18px; }
  .nav-cta { display: none; }
  .nav-links { order: 3; width: 100%; margin: 0; padding: 3px 0 5px; gap: 22px; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
  .nav-links::-webkit-scrollbar { display: none; }
  .site-header .nav-links { color: rgba(255,255,255,.82); }
  .hero { min-height: 680px; align-items: flex-start; background-position: 59% center; }
  .hero-shade { background: rgba(5,8,10,.72); }
  .hero-content { padding: 140px 18px 24px; }
  h1, .page-intro h1, .policy-shell h1 { font-size: 44px; }
  .hero-copy, .page-intro > p:last-child { font-size: 17px; }
  .hero-actions { display: none; }
  .route-note { display: none; }
  .button { width: 100%; }
  .hero-index { display: none; }
  .signal-inner { padding: 0 18px; grid-template-columns: 1fr; }
  .signal-inner div { min-height: 86px; padding: 17px 0; border-left: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .signal-inner div:last-child { border-right: 0; border-bottom: 0; }
  .product-section, .use-cases, .method-inner, .faq-section, .verification-flow, .checklist-section { padding: 74px 18px; }
  .product-copy h2, .section-intro h2, .method-heading h2, .closing-cta h2, .checklist-section h2 { font-size: 36px; }
  .route-toolbar { padding: 0 14px; }
  .route-steps li { grid-template-columns: 38px 1fr; padding: 18px; }
  .case-list { margin-top: 40px; }
  .method-inner { gap: 42px; }
  .method-steps li { grid-template-columns: 48px 1fr; }
  .closing-cta { margin: 0 18px 74px; padding: 34px 24px; grid-template-columns: 1fr; gap: 28px; }
  .footer-inner { min-height: 196px; padding: 34px 18px; grid-template-columns: 1fr; gap: 20px; }
  .footer-links { flex-wrap: wrap; }
  .mobile-cta { position: fixed; z-index: 50; right: 0; bottom: 0; left: 0; display: block; padding: 10px 12px; background: rgba(10,14,16,.96); border-top: 1px solid rgba(255,255,255,.18); }
  .mobile-cta a { min-height: 52px; display: flex; align-items: center; justify-content: center; gap: 20px; color: var(--ink); background: var(--cyan); font-weight: 850; text-decoration: none; }
  .page-intro { padding: 70px 18px 58px; }
  .principles { margin: 0 18px 74px; grid-template-columns: 1fr; }
  .principles article { min-height: 260px; padding: 26px; }
  .principles h2 { margin-top: 58px; font-size: 27px; }
  .verification-flow li { grid-template-columns: 54px 1fr; padding: 18px 0; }
  .checklist-section { grid-template-columns: 1fr; gap: 38px; }
  .policy-shell { padding: 70px 18px 82px; }
  .policy-grid { grid-template-columns: 1fr; }
  .policy-card-wide { grid-column: auto; }
  .policy-card { min-height: 240px; padding: 24px; }
  .policy-card h2 { margin-top: 52px; }
  .policy-card-wide h2 { margin-top: 30px; }
  .policy-footer { padding: 24px 18px; gap: 20px; }
}

@media (max-width: 420px) {
  .brand { font-size: 15px; }
  h1, .page-intro h1, .policy-shell h1 { font-size: 40px; }
  .hero-copy { font-size: 16px; }
  .route-toolbar span:last-child { display: none; }
}

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