:root {
  --ink: #07131f;
  --ink-2: #0b1b2a;
  --panel: #102536;
  --line: rgba(161, 196, 211, .2);
  --muted: #9ab0bc;
  --paper: #eef4f3;
  --white: #ffffff;
  --teal: #5eead4;
  --teal-dark: #0c8f82;
  --amber: #ffb454;
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.6; overflow-x: hidden; }
button, a { font: inherit; }
a { color: 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; left: 1rem; top: -5rem; z-index: 100; background: var(--teal); color: var(--ink); padding: .8rem 1rem; font-weight: 800; border-radius: .25rem; }
.skip-link:focus { top: 1rem; }

.site-header { height: 82px; padding: 0 max(24px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); background: rgba(7,19,31,.9); backdrop-filter: blur(16px); position: sticky; top: 0; z-index: 50; }
.brand { display: flex; align-items: center; gap: .8rem; text-decoration: none; }
.brand-mark { width: 38px; height: 38px; }
.brand-mark svg { width: 100%; height: 100%; fill: none; stroke: var(--teal); stroke-width: 2; }
.brand-mark path:last-child { stroke: var(--amber); stroke-linecap: round; stroke-linejoin: round; }
.brand-name, .footer-brand { font-size: 1.25rem; font-weight: 900; letter-spacing: .05em; }
.brand-name span, .footer-brand span { color: var(--teal); }
.brand-long { font: 600 .68rem/1.25 ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; color: var(--muted); letter-spacing: .08em; border-left: 1px solid var(--line); padding-left: .8rem; }
.site-nav { display: flex; align-items: center; gap: 2rem; }
.site-nav a { text-decoration: none; color: #c9d6dc; font-size: .86rem; font-weight: 700; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--teal); }
.site-nav .nav-cta { border: 1px solid var(--line); padding: .55rem .8rem; color: var(--paper); }
.menu-button { display: none; background: none; border: 0; padding: .5rem; }
.menu-button > span:not(.sr-only) { width: 24px; height: 2px; background: var(--paper); display: block; margin: 5px; }

.hero { min-height: calc(100vh - 82px); max-width: 1440px; margin: 0 auto; display: grid; grid-template-columns: .92fr 1.08fr; gap: 4rem; align-items: center; padding: 5rem max(24px, calc((100vw - var(--max)) / 2)); position: relative; overflow: hidden; }
.hero-grid { position: absolute; inset: 0; opacity: .12; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(to right, #000, transparent 82%); }
.hero-copy, .assurance-console { position: relative; z-index: 1; }
.eyebrow, .section-number { font: 700 .74rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; color: var(--teal); text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: .7rem; }
.eyebrow > span { width: 30px; height: 1px; background: var(--teal); }
h1 { margin: 1.4rem 0; max-width: 700px; font-size: clamp(3rem, 6.5vw, 6.1rem); line-height: .94; letter-spacing: -.065em; font-weight: 800; }
h1 em, .closing h2 em { color: var(--teal); font-style: normal; }
.hero-lede { max-width: 610px; color: #bdcbd2; font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 2rem 0; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 1rem; padding: .75rem 1rem; text-decoration: none; font-weight: 800; font-size: .87rem; border: 1px solid transparent; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--teal); color: var(--ink); }
.button-primary:hover { background: #86f4e3; }
.button-quiet { border-color: var(--line); color: var(--paper); }
.button-quiet:hover { border-color: var(--teal); }
.scope-note { max-width: 610px; margin-top: 2.3rem; padding-left: 1rem; border-left: 2px solid var(--amber); color: var(--muted); font-size: .88rem; }
.scope-note strong { color: var(--paper); }

.assurance-console { background: rgba(11,27,42,.92); border: 1px solid rgba(94,234,212,.28); box-shadow: 0 35px 100px rgba(0,0,0,.42); }
.console-top, .console-footer { display: flex; align-items: center; justify-content: space-between; padding: .75rem 1rem; border-bottom: 1px solid var(--line); font: 700 .66rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; color: var(--muted); }
.live-indicator { color: var(--teal); display: flex; align-items: center; gap: .5rem; }
.live-indicator i { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 12px var(--teal); }
.decision-core { position: relative; aspect-ratio: 1.35; min-height: 360px; }
.trace-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.trace-lines path { stroke: rgba(94,234,212,.45); stroke-width: 1.5; stroke-dasharray: 5 8; fill: none; animation: dash 14s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -130; } }
.core-ring { width: 136px; height: 136px; border: 1px solid var(--teal); border-radius: 50%; position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); display: flex; flex-direction: column; align-items: center; justify-content: center; box-shadow: 0 0 0 14px rgba(94,234,212,.04), inset 0 0 35px rgba(94,234,212,.08); }
.core-ring::before { content: ""; position: absolute; inset: -8px; border: 1px dashed rgba(94,234,212,.35); border-radius: 50%; animation: spin 20s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.core-ring span, .core-ring small, .signal small { color: var(--muted); font: .58rem ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; }
.core-ring strong { color: var(--teal); font: 800 .88rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; margin: .2rem; }
.signal { position: absolute; width: 138px; padding: .75rem; border-left: 2px solid var(--amber); background: rgba(7,19,31,.85); display: grid; gap: .1rem; }
.signal > span { color: var(--amber); font: 700 .65rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.signal strong { font: 800 .72rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .06em; }
.signal-1 { left: 5%; top: 10%; }.signal-2 { right: 5%; top: 10%; }.signal-3 { left: 5%; bottom: 10%; }.signal-4 { right: 5%; bottom: 10%; }
.console-footer { border-top: 1px solid var(--line); border-bottom: 0; justify-content: space-around; }
.console-footer span { display: flex; align-items: baseline; gap: .4rem; }
.console-footer i { color: var(--amber); font: normal 1rem ui-monospace, SFMono-Regular, Menlo, monospace; }

.statement { padding: 7rem max(24px, calc((100vw - 980px) / 2)); background: var(--paper); color: var(--ink); }
.statement p { margin: 0; font-size: clamp(2rem, 4.5vw, 4.5rem); font-weight: 750; line-height: 1.08; letter-spacing: -.045em; }
.statement p span { color: var(--teal-dark); }
.statement .statement-answer { margin-top: 1.5rem; color: #65757c; font-weight: 450; }

.section { padding: 8rem max(24px, calc((100vw - var(--max)) / 2)); }
.section-heading { display: grid; grid-template-columns: 1fr 2.2fr; column-gap: 3rem; align-items: start; margin-bottom: 4rem; }
.section-heading h2 { grid-column: 2; margin: 0; font-size: clamp(2.2rem, 4vw, 4.4rem); line-height: 1.05; letter-spacing: -.05em; max-width: 850px; }
.section-heading .section-number { grid-row: 1; grid-column: 1; }
.section-intro { grid-column: 2; max-width: 620px; color: var(--muted); font-size: 1.08rem; }

.problem { background: #0a1825; }
.problem-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 6rem; }
.problem-copy { color: #b9c8cf; font-size: 1.12rem; }
.problem-copy strong { color: var(--paper); }
.tension-list article { display: grid; grid-template-columns: 50px 1fr; gap: 1rem; border-top: 1px solid var(--line); padding: 1.5rem 0; }
.tension-list article:last-child { border-bottom: 1px solid var(--line); }
.tension-list > article > span { color: var(--amber); font: 700 .72rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.tension-list h3 { font-size: 1.35rem; margin: -.3rem 0 .25rem; }
.tension-list p { margin: 0; color: var(--muted); }

.framework { background: var(--paper); color: var(--ink); }
.framework .section-number { color: var(--teal-dark); }
.framework .section-intro { color: #65757c; }
.framework-workspace { display: grid; grid-template-columns: .72fr 1.28fr; border: 1px solid #c5d2d4; min-height: 500px; box-shadow: 0 25px 70px rgba(7,19,31,.08); }
.claim-tabs { display: flex; flex-direction: column; border-right: 1px solid #c5d2d4; background: #e4ecec; }
.claim-tabs button { flex: 1; min-height: 74px; padding: 1.2rem 1.5rem; border: 0; border-bottom: 1px solid #c5d2d4; background: transparent; color: #4f636c; text-align: left; font-weight: 750; cursor: pointer; display: flex; align-items: center; gap: 1rem; }
.claim-tabs button:last-child { border-bottom: 0; }
.claim-tabs button span { font: 700 .68rem ui-monospace, SFMono-Regular, Menlo, monospace; color: #73878d; }
.claim-tabs button[aria-selected="true"] { background: var(--ink); color: var(--paper); box-shadow: inset 4px 0 var(--teal); }
.claim-tabs button[aria-selected="true"] span { color: var(--teal); }
.claim-tabs button:focus-visible { outline: 3px solid var(--amber); outline-offset: -4px; }
.claim-panel { padding: clamp(2rem, 5vw, 4.5rem); outline: none; }
.claim-meta { display: flex; justify-content: space-between; color: #6d8087; font: 700 .66rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.claim-meta span:first-child { color: var(--teal-dark); }
.claim-panel h3 { font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1; letter-spacing: -.045em; margin: 2.3rem 0 1.2rem; }
.claim-question { font-size: 1.14rem; max-width: 700px; color: #41545d; }
.evidence-box { margin: 2rem 0; padding: 1.4rem; background: #dfe9e8; border-left: 3px solid var(--teal-dark); }
.evidence-box p { margin: 0 0 .6rem; font: 800 .68rem ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .08em; color: #42565e; }
.evidence-box ul { margin: 0; padding-left: 1.2rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: .6rem 1.5rem; }
.evidence-box li { color: #2d424a; }
.claim-result { display: flex; align-items: baseline; gap: .8rem; color: #41545d; }
.claim-result span { font: 800 .68rem ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--teal-dark); text-transform: uppercase; }

.lifecycle { background: var(--ink); }
.lifecycle-track { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5,1fr); counter-reset: track; }
.lifecycle-track li { min-height: 290px; border: 1px solid var(--line); border-right: 0; padding: 1.4rem; display: flex; flex-direction: column; justify-content: space-between; position: relative; }
.lifecycle-track li:last-child { border-right: 1px solid var(--line); }
.lifecycle-track li::after { content: ""; position: absolute; top: 30px; right: -4px; width: 7px; height: 7px; background: var(--teal); border-radius: 50%; z-index: 1; }
.lifecycle-track li:last-child::after { display: none; }
.lifecycle-track > li > span { color: #425a67; font: 600 3rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.lifecycle-track p { color: var(--teal); font: 700 .67rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.lifecycle-track h3 { font-size: 1.22rem; line-height: 1.2; margin: .6rem 0; }
.lifecycle-track small { color: var(--muted); font-size: .85rem; line-height: 1.5; }

.research { background: #102333; }
.research-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.featured-question { min-height: 500px; padding: clamp(2rem, 4vw, 4rem); background: var(--teal); color: var(--ink); display: flex; flex-direction: column; justify-content: space-between; }
.featured-question > p { font: 800 .72rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.featured-question h3 { font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.04; letter-spacing: -.05em; margin: 2rem 0; }
.question-tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.question-tags span { border: 1px solid rgba(7,19,31,.4); padding: .4rem .65rem; font: 700 .68rem ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; }
.question-list { border: 1px solid var(--line); }
.question-list article { min-height: 125px; padding: 1.3rem; display: grid; grid-template-columns: 44px 1fr; gap: 1rem; border-bottom: 1px solid var(--line); }
.question-list article:last-child { border-bottom: 0; }
.question-list span { color: var(--amber); font: 700 .68rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.question-list p { margin: 0; color: #d0dce1; }

.ecosystem { background: var(--paper); color: var(--ink); }
.ecosystem .section-number { color: var(--teal-dark); }
.ecosystem-map { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #b8c7ca; border: 1px solid #b8c7ca; }
.ecosystem-map article { background: var(--paper); padding: 2rem; min-height: 245px; }
.ecosystem-map .ecosystem-primary { grid-column: 1/-1; min-height: 240px; background: var(--ink); color: var(--paper); display: grid; grid-template-columns: 1fr 2fr; column-gap: 3rem; align-content: center; }
.ecosystem-map span { color: var(--teal-dark); font: 800 .66rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.ecosystem-primary span { color: var(--teal); }
.ecosystem-map h3 { font-size: 1.4rem; line-height: 1.18; margin: 1.3rem 0; }
.ecosystem-primary h3 { grid-column: 2; grid-row: 1/3; margin: 0; font-size: clamp(2rem, 4vw, 3.8rem); letter-spacing: -.04em; }
.ecosystem-primary p { grid-column: 2; font-size: 1.08rem; color: var(--muted); }
.ecosystem-map article:not(.ecosystem-primary) p { color: #52666e; }

.closing { padding: 10rem max(24px, calc((100vw - var(--max)) / 2)); position: relative; overflow: hidden; }
.closing::after { content: "VTAS"; position: absolute; right: -2vw; bottom: -10vw; font-size: 31vw; font-weight: 950; line-height: 1; color: rgba(94,234,212,.025); pointer-events: none; }
.closing h2 { margin: 1.3rem 0 2.5rem; font-size: clamp(2.7rem, 6vw, 6.5rem); line-height: .98; letter-spacing: -.06em; position: relative; z-index: 1; }
.closing .button { position: relative; z-index: 1; }
.site-footer { max-width: var(--max); margin: 0 auto; min-height: 160px; border-top: 1px solid var(--line); display: grid; grid-template-columns: .5fr 1fr 2fr auto; gap: 2rem; align-items: center; color: var(--muted); font-size: .8rem; }
.footer-note { max-width: 500px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } .reveal { opacity: 1; transform: none; } }

@media (max-width: 1000px) {
  .hero { grid-template-columns: 1fr; padding-top: 4rem; }
  .hero-copy { max-width: 780px; }
  .assurance-console { max-width: 720px; width: 100%; }
  .problem-grid { gap: 3rem; }
  .lifecycle-track { grid-template-columns: repeat(2,1fr); }
  .lifecycle-track li:nth-child(even) { border-right: 1px solid var(--line); }
  .site-footer { padding: 2rem 24px; grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .brand-long { display: none; }
  .menu-button { display: block; color: var(--paper); cursor: pointer; }
  .site-nav { display: none; position: absolute; left: 0; right: 0; top: 82px; padding: 1.5rem 24px 2rem; background: var(--ink-2); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 1rem 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin-top: .8rem; padding: .8rem; text-align: center; border: 1px solid var(--line); }
  .hero { min-height: 0; gap: 3rem; }
  .decision-core { min-height: 310px; }
  .signal { width: 112px; padding: .6rem; }
  .signal small { display: none; }
  .core-ring { width: 110px; height: 110px; }
  .section { padding-top: 5.5rem; padding-bottom: 5.5rem; }
  .section-heading { display: block; }
  .section-heading h2 { margin-top: 1rem; }
  .problem-grid, .research-grid { grid-template-columns: 1fr; }
  .framework-workspace { grid-template-columns: 1fr; }
  .claim-tabs { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid #c5d2d4; }
  .claim-tabs button { flex: 0 0 auto; min-width: 145px; border-bottom: 0; border-right: 1px solid #c5d2d4; }
  .claim-tabs button[aria-selected="true"] { box-shadow: inset 0 -4px var(--teal); }
  .evidence-box ul { grid-template-columns: 1fr; }
  .lifecycle-track { grid-template-columns: 1fr; }
  .lifecycle-track li { min-height: 210px; border-right: 1px solid var(--line); }
  .lifecycle-track li::after { display: none; }
  .ecosystem-map { grid-template-columns: 1fr; }
  .ecosystem-map .ecosystem-primary { grid-column: auto; display: block; }
  .ecosystem-primary h3 { margin: 1.2rem 0; }
  .closing { padding-top: 7rem; padding-bottom: 7rem; }
}

@media (max-width: 480px) {
  h1 { font-size: 3.35rem; }
  .hero { padding-left: 18px; padding-right: 18px; }
  .assurance-console { margin-left: -8px; width: calc(100% + 16px); }
  .console-footer span { flex-direction: column; gap: 0; text-align: center; }
  .decision-core { min-height: 280px; }
  .signal { width: 92px; }
  .signal strong { font-size: .62rem; }
  .scope-note { font-size: .84rem; }
  .statement { padding-top: 5rem; padding-bottom: 5rem; }
  .site-footer { grid-template-columns: 1fr; gap: .5rem; padding-bottom: 3rem; }
}