:root {
  --ink: #091722;
  --ink-2: #112634;
  --night: #06131d;
  --night-2: #0a1e2a;
  --paper: #f2f7f8;
  --white: #ffffff;
  --muted: #6a7a83;
  --line: #cbd8dc;
  --line-dark: rgba(206, 238, 244, 0.16);
  --cyan: #3ee4df;
  --cyan-2: #a7fffb;
  --blue: #4e8cff;
  --orange: #ffb15c;
  --shadow: 0 24px 70px rgba(6, 19, 29, 0.12);
  --radius: 4px;
  --max: 1440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.sr-only { 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; z-index: 1000; top: 12px; left: 12px; padding: 10px 14px; background: var(--white); color: var(--night); transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto 0;
  height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(22px, 4vw, 72px);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.12);
  background: rgba(6, 19, 29, .76);
  backdrop-filter: blur(18px);
  transition: background .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled { background: rgba(6, 19, 29, .95); box-shadow: 0 8px 35px rgba(0,0,0,.16); }
.brand { display: inline-flex; align-items: center; gap: 11px; width: fit-content; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; color: var(--cyan); }
.brand-mark svg { width: 100%; height: 100%; }
.brand > span:last-child { display: flex; flex-direction: column; line-height: 1.05; letter-spacing: .08em; }
.brand strong { font-size: .82rem; }
.brand small { margin-top: 5px; font-size: .62rem; color: rgba(255,255,255,.56); text-transform: uppercase; letter-spacing: .18em; }
.site-nav { display: flex; align-items: center; gap: clamp(20px, 2.5vw, 42px); font-size: .82rem; font-weight: 600; color: rgba(255,255,255,.72); }
.site-nav a { position: relative; padding: 29px 0 26px; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -1px; height: 2px; background: var(--cyan); transition: right .2s ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--white); }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.site-nav .external-nav { color: var(--cyan-2); }
.header-cta { justify-self: end; font-size: .8rem; font-weight: 700; padding: 10px 0; border-bottom: 1px solid var(--cyan); }
.header-cta span { color: var(--cyan); margin-left: 8px; }
.menu-button { display: none; border: 0; background: none; color: white; width: 42px; height: 42px; align-items: center; justify-content: center; flex-direction: column; gap: 7px; }
.menu-button span:not(.sr-only) { width: 22px; height: 1px; background: currentColor; transition: transform .2s ease; }

.hero {
  position: relative;
  min-height: min(920px, 100svh);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, .72fr);
  gap: clamp(46px, 7vw, 120px);
  align-items: center;
  overflow: hidden;
  padding: 136px clamp(22px, 6vw, 104px) 84px;
  color: var(--white);
  background:
    radial-gradient(circle at 70% 34%, rgba(53, 223, 218, .10), transparent 28%),
    radial-gradient(circle at 12% 90%, rgba(78, 140, 255, .12), transparent 34%),
    linear-gradient(133deg, #06131d 0%, #071924 54%, #092636 100%);
}
.hero::before { content: ""; position: absolute; width: 780px; height: 780px; right: -360px; bottom: -500px; border: 1px solid rgba(62,228,223,.22); border-radius: 50%; box-shadow: 0 0 0 88px rgba(62,228,223,.028), 0 0 0 176px rgba(62,228,223,.018); }
.hero-grid, .contact-grid { position: absolute; inset: 0; opacity: .16; pointer-events: none; background-image: linear-gradient(rgba(151,224,235,.22) 1px, transparent 1px), linear-gradient(90deg, rgba(151,224,235,.18) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to right, rgba(0,0,0,.92), transparent 78%); }
.hero-copy, .hero-instrument { position: relative; z-index: 1; }
.hero-copy { max-width: 860px; }
.eyebrow { margin: 0 0 24px; display: flex; align-items: center; gap: 12px; color: var(--cyan-2); font-size: .73rem; font-weight: 750; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow span { width: 29px; height: 1px; background: currentColor; }
.eyebrow.dark { color: #007c83; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 30px; max-width: 900px; font-size: clamp(3.1rem, 6.3vw, 7.35rem); line-height: .94; letter-spacing: -.066em; font-weight: 660; }
h1 em { color: var(--cyan); font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
.hero-lede { max-width: 720px; margin-bottom: 33px; color: rgba(230,244,247,.72); font-size: clamp(1rem, 1.4vw, 1.25rem); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 48px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; padding: 13px 20px; border: 1px solid transparent; font-size: .83rem; font-weight: 750; letter-spacing: .015em; transition: transform .2s ease, background .2s ease, border .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--cyan); color: #041719; }
.button-primary:hover { background: var(--cyan-2); }
.button-quiet { border-color: rgba(255,255,255,.24); color: var(--white); }
.button-quiet:hover { border-color: rgba(255,255,255,.58); background: rgba(255,255,255,.05); }
.status-line { display: grid; grid-template-columns: auto auto 1fr; gap: 10px; align-items: center; max-width: 700px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); font-size: .77rem; color: rgba(255,255,255,.55); }
.status-line strong { color: var(--white); text-transform: uppercase; letter-spacing: .08em; }
.status-indicator { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(62,228,223,.10), 0 0 18px var(--cyan); }

.hero-instrument { align-self: center; min-width: 0; border: 1px solid rgba(184,229,235,.22); background: rgba(4,19,27,.58); box-shadow: 0 35px 90px rgba(0,0,0,.28); backdrop-filter: blur(10px); }
.instrument-topline, .instrument-footer { min-height: 48px; display: flex; align-items: center; justify-content: space-between; padding: 0 18px; color: rgba(255,255,255,.46); font-size: .67rem; letter-spacing: .15em; text-transform: uppercase; border-bottom: 1px solid rgba(184,229,235,.14); }
.instrument-topline code { color: var(--cyan); font-size: .68rem; }
.process-flow { margin: 0; padding: 10px 22px; list-style: none; }
.process-flow li { position: relative; min-height: 103px; display: grid; grid-template-columns: 38px minmax(0,1fr) auto; gap: 16px; align-items: center; border-bottom: 1px solid rgba(184,229,235,.12); }
.process-flow li:last-child { border-bottom: 0; }
.process-flow li:not(:last-child)::after { content: ""; position: absolute; left: 17px; bottom: -16px; z-index: 1; width: 1px; height: 32px; background: var(--cyan); }
.step-index { display: grid; place-items: center; width: 35px; height: 35px; border: 1px solid rgba(62,228,223,.45); border-radius: 50%; color: var(--cyan); font: 600 .66rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.process-flow strong { display: block; margin-bottom: 5px; font-size: 1.05rem; letter-spacing: -.01em; }
.process-flow small { display: block; color: rgba(255,255,255,.45); font-size: .73rem; }
.signal { color: #c9d8dc; border: 1px solid rgba(201,216,220,.3); padding: 5px 7px; font: 650 .54rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.signal-cyan { color: var(--cyan); border-color: rgba(62,228,223,.38); }
.signal-blue { color: #86aefc; border-color: rgba(78,140,255,.45); }
.signal-white { color: var(--white); border-color: rgba(255,255,255,.5); }
.instrument-footer { border: 0; border-top: 1px solid rgba(184,229,235,.14); letter-spacing: .05em; text-transform: none; }
.pulse-line { display: flex; align-items: center; gap: 3px; height: 20px; }
.pulse-line i { width: 2px; background: var(--cyan); opacity: .7; animation: pulse 1.5s ease-in-out infinite; }
.pulse-line i:nth-child(1), .pulse-line i:nth-child(5) { height: 5px; }
.pulse-line i:nth-child(2), .pulse-line i:nth-child(6) { height: 10px; animation-delay: .15s; }
.pulse-line i:nth-child(3) { height: 17px; animation-delay: .3s; }
.pulse-line i:nth-child(4) { height: 12px; animation-delay: .45s; }
@keyframes pulse { 50% { opacity: .25; transform: scaleY(.55); } }

.principle-strip { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4,1fr); margin: -1px 0 0; padding: 0 clamp(22px, 6vw, 104px); color: var(--white); background: #0b2431; border-top: 1px solid rgba(255,255,255,.1); }
.principle-strip > div { min-height: 133px; padding: 27px clamp(16px,2vw,34px); border-right: 1px solid rgba(255,255,255,.12); }
.principle-strip > div:first-child { border-left: 1px solid rgba(255,255,255,.12); }
.principle-strip span { display: block; margin-bottom: 16px; color: var(--cyan); font: .65rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.principle-strip strong { display: block; margin-bottom: 5px; font-size: .93rem; }
.principle-strip small { display: block; max-width: 230px; color: rgba(255,255,255,.48); font-size: .72rem; line-height: 1.45; }

.section { padding: clamp(82px, 10vw, 156px) clamp(22px, 6vw, 104px); }
.section-heading { max-width: var(--max); margin: 0 auto 58px; display: grid; grid-template-columns: 1.35fr .65fr; gap: 70px; align-items: end; }
.section-heading.compact { grid-template-columns: 1fr; }
.section-heading h2, .evidence-intro h2, .audience-header h2, .scale-copy h2, .ethics-title h2, .contact-section h2 { margin: 0; font-size: clamp(2.35rem, 4.6vw, 5.25rem); line-height: 1.03; letter-spacing: -.052em; font-weight: 620; }
.section-heading > p { margin: 0; max-width: 510px; color: var(--muted); font-size: 1.02rem; line-height: 1.75; }

.system-section { background: #edf4f5; }
.architecture { max-width: var(--max); margin: 0 auto; background: var(--white); box-shadow: var(--shadow); border: 1px solid #d8e3e5; }
.architecture-rail { min-height: 42px; display: grid; grid-template-columns: repeat(3, 1fr); align-items: center; padding: 0 28px; background: var(--ink); color: rgba(255,255,255,.42); font: .59rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .11em; }
.architecture-rail span:nth-child(2) { text-align: center; }
.architecture-rail span:last-child { text-align: right; }
.architecture-layer { display: grid; grid-template-columns: 245px minmax(0,1fr); border-bottom: 1px solid var(--line); }
.layer-label { padding: 28px; border-right: 1px solid var(--line); background: #f7fafb; }
.layer-label span { display: block; margin-bottom: 18px; color: #16858a; font: .64rem ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .12em; }
.layer-label strong { display: block; margin-bottom: 5px; font-size: 1rem; }
.layer-label small { color: var(--muted); font-size: .72rem; }
.module-row { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 12px; align-items: stretch; padding: 24px; }
.module { min-width: 0; padding: 20px; border: 1px solid #dbe5e7; background: linear-gradient(145deg, #fff, #f7fbfb); }
.module-tag { display: inline-block; margin-bottom: 32px; padding: 3px 6px; color: #08767c; background: #daf6f5; font: 700 .58rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.module strong { display: block; margin-bottom: 9px; font-size: .9rem; }
.module small { display: block; color: var(--muted); font-size: .72rem; line-height: 1.48; }
.flow-arrow { align-self: center; color: #22a7ac; }
.control-content { padding: 28px 24px; }
.control-content p { max-width: 880px; margin-bottom: 23px; color: #455862; font-size: .86rem; }
.state-track { display: flex; flex-wrap: wrap; gap: 8px; }
.state-track span { padding: 7px 9px; border: 1px solid #c8d9dc; color: #48616b; background: #f8fbfb; font: 600 .59rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .05em; }
.state-track span:last-child { color: #8b4d04; border-color: #efc58f; background: #fff6e8; }
.sentinel-layer { background: #0b2634; color: var(--white); }
.sentinel-layer .layer-label { background: #0c202c; border-color: rgba(255,255,255,.12); }
.sentinel-layer .layer-label span { color: var(--cyan); }
.sentinel-layer .layer-label small { color: rgba(255,255,255,.45); }
.sentinel-modules { display: flex; flex-wrap: wrap; align-content: center; gap: 10px; padding: 28px 24px; }
.sentinel-modules span { padding: 10px 13px; border: 1px solid rgba(62,228,223,.24); background: rgba(62,228,223,.05); color: #d8fcfb; font-size: .74rem; }
.human-band { display: grid; grid-template-columns: 217px 1fr; gap: 28px; align-items: center; min-height: 72px; padding: 14px 28px; color: #37250e; background: #ffe5c2; }
.human-band span { font: 700 .63rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.human-band p { margin: 0; font-size: .78rem; }

.evidence-section { color: var(--white); background: var(--night); }
.evidence-intro { max-width: 970px; margin: 0 auto 66px; text-align: center; }
.evidence-intro .eyebrow { justify-content: center; }
.evidence-intro p:last-child { max-width: 760px; margin: 26px auto 0; color: rgba(255,255,255,.58); line-height: 1.75; }
.evidence-chain { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--line-dark); }
.evidence-chain article { position: relative; min-height: 315px; padding: 26px; border-right: 1px solid var(--line-dark); }
.evidence-chain article:last-child { border: 0; }
.evidence-chain article:not(:last-child)::after { content: "→"; position: absolute; z-index: 2; right: -13px; top: 65px; display: grid; place-items: center; width: 26px; height: 26px; color: var(--cyan); background: var(--night); font-size: .85rem; }
.chain-number { position: absolute; right: 24px; top: 24px; color: rgba(255,255,255,.34); font: .63rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.chain-icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 42px; color: var(--cyan); border: 1px solid rgba(62,228,223,.45); font: 600 .75rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.evidence-chain h3 { margin-bottom: 13px; font-size: 1.28rem; }
.evidence-chain p { min-height: 70px; margin-bottom: 28px; color: rgba(255,255,255,.53); font-size: .82rem; }
.evidence-chain code { color: #98bac1; font-size: .63rem; }
.trust-callout { max-width: var(--max); margin: 28px auto 0; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 33px 38px; color: #2b1d0d; background: var(--orange); }
.trust-callout span { display: block; margin-bottom: 7px; font: 700 .63rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; text-transform: uppercase; }
.trust-callout strong { display: block; font-size: 1.3rem; line-height: 1.35; }
.trust-callout p { margin: 0; font-size: .85rem; line-height: 1.65; }

.capabilities-section { background: var(--paper); }
.capability-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability-grid article { min-height: 280px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .2s ease, transform .2s ease; }
.capability-grid article:hover { position: relative; z-index: 1; background: var(--white); transform: translateY(-3px); box-shadow: 0 15px 36px rgba(11,34,45,.08); }
.capability-grid article > span { display: block; margin-bottom: 68px; color: #12878d; font: .62rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.capability-grid h3 { margin-bottom: 12px; font-size: 1.25rem; }
.capability-grid p { max-width: 370px; margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.66; }

.audience-section { color: var(--white); background: linear-gradient(135deg, #0c2a38, #071720); }
.audience-header { max-width: 850px; margin: 0 auto 68px; text-align: center; }
.audience-header .eyebrow { justify-content: center; }
.audience-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.audience-grid article { min-height: 420px; padding: 34px; border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.035); }
.audience-index { display: block; margin-bottom: 74px; color: var(--cyan); font: .62rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.audience-grid h3 { max-width: 290px; font-size: 1.42rem; line-height: 1.2; }
.audience-grid p { color: rgba(255,255,255,.57); font-size: .84rem; line-height: 1.65; }
.audience-grid ul { margin: 28px 0 0; padding: 20px 0 0; list-style: none; border-top: 1px solid rgba(255,255,255,.13); }
.audience-grid li { position: relative; padding: 7px 0 7px 18px; color: rgba(255,255,255,.76); font-size: .77rem; }
.audience-grid li::before { content: "+"; position: absolute; left: 0; color: var(--cyan); }

.validation-section { background: #edf4f5; }
.timeline { position: relative; max-width: var(--max); margin: 0 auto 34px; display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.timeline::before { content: ""; position: absolute; top: 52px; left: 2%; right: 2%; height: 1px; background: #aebfc4; }
.timeline article { position: relative; padding-top: 86px; }
.time { position: absolute; top: 0; color: #236f76; font: .68rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .04em; }
.timeline-dot { position: absolute; z-index: 1; top: 46px; left: 0; width: 13px; height: 13px; border: 3px solid #edf4f5; border-radius: 50%; background: #168e94; box-shadow: 0 0 0 1px #168e94; }
.timeline h3 { margin-bottom: 12px; font-size: 1.08rem; }
.timeline p { min-height: 94px; color: var(--muted); font-size: .8rem; line-height: 1.62; }
.timeline small { display: block; padding-top: 13px; border-top: 1px solid #cad7da; color: #34535c; font-size: .68rem; font-weight: 650; }
.metrics-panel { max-width: var(--max); margin: 64px auto 0; display: grid; grid-template-columns: .78fr 1.22fr; color: var(--white); background: var(--ink); }
.metrics-copy { padding: 43px; border-right: 1px solid rgba(255,255,255,.14); }
.metrics-copy > span { display: block; margin-bottom: 37px; color: var(--cyan); font: .62rem ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .1em; }
.metrics-copy h3 { max-width: 460px; margin: 0; font-size: 1.55rem; line-height: 1.32; }
.metric-list { display: grid; grid-template-columns: repeat(2, 1fr); padding: 25px 42px; }
.metric-list span { position: relative; display: flex; align-items: center; min-height: 51px; padding-left: 18px; color: rgba(255,255,255,.68); border-bottom: 1px solid rgba(255,255,255,.11); font-size: .76rem; }
.metric-list span:nth-last-child(-n+2) { border-bottom: 0; }
.metric-list span::before { content: ""; position: absolute; left: 0; width: 5px; height: 5px; background: var(--cyan); }

.scale-section { display: grid; grid-template-columns: .82fr 1.18fr; gap: 80px; align-items: center; color: var(--white); background: #071720; }
.scale-copy { max-width: 570px; }
.scale-copy p:last-child { max-width: 520px; margin: 30px 0 0; color: rgba(255,255,255,.55); line-height: 1.75; }
.scale-map { position: relative; display: grid; grid-template-columns: repeat(5,1fr); align-items: start; min-height: 230px; padding-top: 22px; }
.scale-line { position: absolute; top: 47px; left: 8%; right: 8%; height: 1px; background: linear-gradient(90deg, rgba(62,228,223,.25), var(--cyan), rgba(62,228,223,.25)); }
.scale-map article { position: relative; z-index: 1; text-align: center; }
.scale-map article > span { display: grid; place-items: center; width: 50px; height: 50px; margin: 0 auto 30px; border: 1px solid rgba(62,228,223,.53); border-radius: 50%; color: var(--cyan); background: #071720; font: .64rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.scale-map article:nth-of-type(3) > span { transform: scale(1.18); background: #0e313d; box-shadow: 0 0 0 8px rgba(62,228,223,.05); }
.scale-map strong { display: block; margin-bottom: 8px; font-size: .84rem; }
.scale-map small { display: block; padding: 0 8px; color: rgba(255,255,255,.43); font-size: .66rem; line-height: 1.45; }

.ethics-section { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; background: var(--white); }
.ethics-title { position: sticky; top: 120px; align-self: start; }
.ethics-list { border-top: 1px solid var(--line); }
.ethics-list article { display: grid; grid-template-columns: 48px 1fr; gap: 22px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.ethics-list article > span { color: #16858a; font: .66rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ethics-list h3 { margin-bottom: 8px; font-size: 1.1rem; }
.ethics-list p { max-width: 650px; margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.65; }

.ecosystem-section { background: #e5eef0; }
.ecosystem-heading { max-width: var(--max); margin: 0 auto 58px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: end; }
.ecosystem-heading h2 { margin: 0; max-width: 820px; font-size: clamp(2.35rem, 4.6vw, 5.25rem); line-height: 1.03; letter-spacing: -.052em; font-weight: 620; }
.ecosystem-intro { max-width: 520px; }
.ecosystem-intro p { margin-bottom: 26px; color: var(--muted); line-height: 1.75; }
.button-dark { color: var(--white); background: var(--ink); }
.button-dark:hover { background: #12313f; }
.resource-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.resource-grid > a { min-height: 292px; display: flex; flex-direction: column; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.2); transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.resource-grid > a:hover, .resource-grid > a:focus-visible { position: relative; z-index: 1; transform: translateY(-3px); background: var(--white); box-shadow: 0 17px 38px rgba(11,34,45,.1); outline: none; }
.resource-grid > a > span { display: block; margin-bottom: 48px; color: #12878d; font: .62rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.resource-grid h3 { margin-bottom: 11px; font-size: 1.22rem; }
.resource-grid p { margin-bottom: 28px; color: var(--muted); font-size: .82rem; line-height: 1.65; }
.resource-grid strong { margin-top: auto; color: #08767c; font-size: .73rem; }

.contact-section { position: relative; overflow: hidden; display: grid; grid-template-columns: 1.2fr .8fr; gap: 80px; align-items: end; padding: clamp(86px, 10vw, 150px) clamp(22px, 6vw, 104px); color: var(--white); background: linear-gradient(130deg, #06212d, #0c3f49); }
.contact-section::after { content: ""; position: absolute; right: -120px; bottom: -220px; width: 520px; height: 520px; border: 1px solid rgba(62,228,223,.32); border-radius: 50%; box-shadow: 0 0 0 60px rgba(62,228,223,.03), 0 0 0 120px rgba(62,228,223,.02); }
.contact-section > div:not(.contact-grid) { position: relative; z-index: 1; }
.contact-section h2 { max-width: 930px; }
.contact-copy { max-width: 460px; }
.contact-copy p { margin-bottom: 28px; color: rgba(255,255,255,.64); line-height: 1.7; }
.contact-details { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: -5px 0 28px; }
.contact-details a { padding-bottom: 3px; color: var(--cyan-2); border-bottom: 1px solid rgba(167,255,251,.42); font-size: .86rem; font-weight: 650; }
.button-light { color: var(--night); background: var(--white); }
.button-light:hover { background: var(--cyan-2); }

footer { display: grid; grid-template-columns: 1.2fr 1.25fr .75fr .85fr 1fr; align-items: start; gap: clamp(24px, 3vw, 52px); min-height: 255px; padding: 54px clamp(22px, 6vw, 104px); color: var(--white); background: #040d13; }
.footer-brand small { color: rgba(255,255,255,.45); }
.footer-summary p { max-width: 360px; margin: 0 0 18px; color: rgba(255,255,255,.42); font-size: .74rem; line-height: 1.55; }
.footer-summary > a { color: var(--cyan); font-size: .73rem; }
.footer-column, .footer-contact { display: flex; flex-direction: column; gap: 7px; color: rgba(255,255,255,.55); font-size: .72rem; }
.footer-column strong, .footer-contact strong { margin-bottom: 8px; color: var(--white); font-size: .67rem; letter-spacing: .08em; text-transform: uppercase; }
.footer-column a:hover, .footer-contact a:hover { color: var(--cyan); }
.footer-contact a { color: var(--cyan-2); }

@media (max-width: 1100px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { position: fixed; inset: 76px 0 auto 0; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 10px 24px 24px; background: rgba(6,19,29,.98); border-bottom: 1px solid rgba(255,255,255,.14); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .header-cta { display: none; }
  .menu-button { display: flex; justify-self: end; }
  .menu-button[aria-expanded="true"] span:nth-child(2) { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 145px; }
  .hero-copy { max-width: 900px; }
  .hero-instrument { width: min(760px,100%); }
  .architecture-layer { grid-template-columns: 190px minmax(0,1fr); }
  .layer-label { padding: 24px; }
  .module-row { grid-template-columns: 1fr; }
  .flow-arrow { transform: rotate(90deg); justify-self: center; }
  .scale-section, .ethics-section, .contact-section, .ecosystem-heading { grid-template-columns: 1fr; }
  .ethics-title { position: static; }
  .scale-map { max-width: 780px; width: 100%; }
}

@media (max-width: 780px) {
  .site-header { height: 68px; padding-inline: 18px; }
  .site-nav { top: 68px; }
  .brand-mark { width: 34px; height: 34px; }
  .hero { grid-template-columns: 1fr; gap: 48px; padding: 118px 20px 64px; }
  h1 { font-size: clamp(2.9rem, 15vw, 5rem); }
  .status-line { grid-template-columns: auto 1fr; }
  .status-line span:last-child { grid-column: 1 / -1; }
  .process-flow { padding-inline: 14px; }
  .process-flow li { grid-template-columns: 34px minmax(0,1fr); }
  .process-flow .signal { display: none; }
  .principle-strip { grid-template-columns: repeat(2,1fr); padding: 0 20px; }
  .principle-strip > div:nth-child(odd) { border-left: 1px solid rgba(255,255,255,.12); }
  .principle-strip > div { min-height: 145px; border-bottom: 1px solid rgba(255,255,255,.12); }
  .section { padding: 82px 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 28px; margin-bottom: 42px; }
  .section-heading h2, .evidence-intro h2, .audience-header h2, .scale-copy h2, .ethics-title h2, .contact-section h2 { font-size: clamp(2.25rem, 11vw, 4rem); }
  .architecture-rail { display: none; }
  .architecture-layer { grid-template-columns: 1fr; }
  .layer-label { border-right: 0; border-bottom: 1px solid var(--line); }
  .sentinel-layer .layer-label { border-color: rgba(255,255,255,.12); }
  .human-band { grid-template-columns: 1fr; gap: 8px; }
  .evidence-chain { grid-template-columns: 1fr; }
  .evidence-chain article { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .evidence-chain article:not(:last-child)::after { content: "↓"; top: auto; right: 24px; bottom: -13px; }
  .evidence-chain p { min-height: 0; }
  .trust-callout { grid-template-columns: 1fr; gap: 20px; padding: 27px; }
  .capability-grid, .audience-grid, .resource-grid { grid-template-columns: 1fr; }
  .capability-grid article { min-height: auto; }
  .capability-grid article > span, .audience-index { margin-bottom: 38px; }
  .audience-grid article { min-height: auto; }
  .timeline { grid-template-columns: 1fr; gap: 10px; }
  .timeline::before { top: 0; bottom: 0; left: 6px; right: auto; width: 1px; height: auto; }
  .timeline article { padding: 0 0 46px 35px; }
  .time { position: static; display: block; margin-bottom: 15px; }
  .timeline-dot { top: 5px; left: 0; }
  .timeline p { min-height: 0; }
  .metrics-panel { grid-template-columns: 1fr; }
  .metrics-copy { padding: 30px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.14); }
  .metric-list { grid-template-columns: 1fr; padding: 18px 30px; }
  .metric-list span:nth-last-child(2) { border-bottom: 1px solid rgba(255,255,255,.11); }
  .scale-section, .ethics-section, .contact-section { gap: 50px; }
  .scale-map { grid-template-columns: 1fr; gap: 24px; padding-top: 0; }
  .scale-line { top: 24px; bottom: 24px; left: 24px; right: auto; width: 1px; height: auto; }
  .scale-map article { display: grid; grid-template-columns: 50px 1fr; column-gap: 20px; text-align: left; }
  .scale-map article > span { grid-row: 1 / 3; margin: 0; }
  .scale-map article:nth-of-type(3) > span { transform: none; }
  .scale-map strong { align-self: end; }
  .scale-map small { padding: 0; }
  footer { grid-template-columns: 1fr 1fr; }
  .footer-brand, .footer-summary { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  footer { grid-template-columns: 1fr; }
  .footer-brand, .footer-summary { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}