:root {
  color-scheme: dark;
  --bg: #07111b;
  --panel: #0b1a27;
  --line: rgba(151, 190, 211, .17);
  --text: #eef5f6;
  --muted: #9aadb7;
  --cyan: #69d8e6;
  --amber: #f0bd72;
  --page: min(1180px, calc(100vw - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

.site-header {
  width: var(--page);
  height: 84px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 18px; letter-spacing: -.03em; }
.brand strong { color: var(--cyan); font-weight: 600; }
.brand-mark { position: relative; display: inline-block; width: 28px; height: 28px; transform: rotate(30deg); }
.brand-mark i { position: absolute; width: 7px; height: 7px; border: 1px solid var(--cyan); border-radius: 50%; }
.brand-mark i:nth-child(1) { left: 1px; top: 10px; }
.brand-mark i:nth-child(2) { right: 1px; top: 2px; }
.brand-mark i:nth-child(3) { right: 2px; bottom: 1px; border-color: var(--amber); }
.brand-mark::before, .brand-mark::after { content: ""; position: absolute; height: 1px; background: rgba(105,216,230,.55); transform-origin: left center; }
.brand-mark::before { width: 18px; left: 6px; top: 13px; transform: rotate(-31deg); }
.brand-mark::after { width: 17px; left: 7px; top: 14px; transform: rotate(29deg); }
nav { display: flex; gap: 30px; color: #b8c7ce; font-size: 13px; }
nav a { transition: color .2s ease; }
nav a:hover, nav a:focus-visible { color: #fff; }
.service-state { justify-self: end; display: inline-flex; align-items: center; gap: 8px; color: #b8c7ce; font-size: 12px; }
.service-state i { width: 7px; height: 7px; border-radius: 50%; background: #78d5b0; box-shadow: 0 0 12px rgba(120,213,176,.7); }

.hero { position: relative; min-height: 690px; overflow: hidden; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-art { position: absolute; inset: 0; background: url("/assets/network-hero.webp") 60% center / cover no-repeat; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,14,24,.98) 0%, rgba(5,17,29,.91) 31%, rgba(5,17,29,.32) 64%, rgba(4,14,24,.12) 100%), linear-gradient(0deg, rgba(3,13,22,.4), transparent 50%); }
.hero-content { position: relative; z-index: 1; width: var(--page); margin: 0 auto; padding-top: 120px; }
.eyebrow, .section-number { margin: 0 0 22px; color: var(--cyan); font-size: 11px; font-weight: 650; letter-spacing: .19em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 740px; margin-bottom: 28px; font-size: clamp(50px, 6.4vw, 88px); font-weight: 420; line-height: .98; letter-spacing: -.058em; }
.lead { max-width: 570px; color: #b6c6cd; font-size: 18px; line-height: 1.7; }
.hero-link { display: inline-flex; gap: 12px; align-items: center; margin-top: 20px; padding-bottom: 6px; border-bottom: 1px solid rgba(105,216,230,.55); color: #e8f7f8; font-size: 13px; }
.hero-link span { color: var(--cyan); }
.hero-facts { position: absolute; z-index: 1; right: max(24px, calc((100vw - min(1180px, calc(100vw - 48px))) / 2)); bottom: 40px; display: flex; margin: 0; padding: 18px 22px; border: 1px solid var(--line); background: rgba(5,18,29,.68); backdrop-filter: blur(14px); }
.hero-facts div { min-width: 130px; padding: 0 20px; border-left: 1px solid var(--line); }
.hero-facts div:first-child { border-left: 0; }
.hero-facts dt { color: #7f98a3; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.hero-facts dd { margin: 3px 0 0; font-size: 13px; }

.section { width: var(--page); margin: 0 auto; padding: 125px 0; }
.intro { display: grid; grid-template-columns: 1fr 1fr; gap: 12%; align-items: end; }
h2 { margin-bottom: 0; font-size: clamp(38px, 4.5vw, 62px); font-weight: 420; line-height: 1.08; letter-spacing: -.047em; }
.section-copy { max-width: 530px; margin-bottom: 5px; color: var(--muted); font-size: 17px; }

.capabilities { width: var(--page); margin: 0 auto 125px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.capabilities article { min-height: 310px; padding: 34px; border-left: 1px solid var(--line); background: linear-gradient(145deg, rgba(16,40,55,.55), rgba(7,19,29,.35)); }
.capabilities article:first-child { border-left: 0; }
.card-index { color: var(--amber); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.capabilities h3 { margin: 100px 0 16px; font-size: 22px; font-weight: 480; letter-spacing: -.025em; }
.capabilities p { max-width: 300px; margin-bottom: 0; color: var(--muted); font-size: 14px; }

.principles { display: grid; grid-template-columns: 1.05fr .95fr; gap: 10%; border-top: 1px solid var(--line); }
.principles ol { margin: 0; padding: 0; list-style: none; }
.principles li { display: grid; grid-template-columns: 55px 1fr; gap: 18px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.principles li > span { color: var(--cyan); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.principles strong { display: block; margin-bottom: 5px; font-weight: 520; }
.principles li p { margin: 0; color: var(--muted); font-size: 14px; }

.operations { width: var(--page); min-height: 410px; margin: 0 auto 110px; padding: 70px; display: grid; grid-template-columns: 1fr 1fr; gap: 10%; align-items: center; overflow: hidden; border: 1px solid var(--line); background: #0a1b29; }
.operations h2 { margin-bottom: 24px; }
.operations p:not(.section-number) { max-width: 520px; margin-bottom: 0; color: var(--muted); }
.signal { height: 230px; display: flex; justify-content: center; align-items: end; gap: 18px; transform: skewX(-10deg); }
.signal span { width: 9%; border: 1px solid rgba(105,216,230,.38); background: linear-gradient(0deg, rgba(105,216,230,.08), rgba(105,216,230,.6)); box-shadow: 0 0 26px rgba(105,216,230,.09); }
.signal span:nth-child(1) { height: 22%; }
.signal span:nth-child(2) { height: 47%; }
.signal span:nth-child(3) { height: 34%; }
.signal span:nth-child(4) { height: 76%; }
.signal span:nth-child(5) { height: 58%; background: linear-gradient(0deg, rgba(240,189,114,.07), rgba(240,189,114,.65)); border-color: rgba(240,189,114,.4); }

footer { width: var(--page); min-height: 125px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 30px; border-top: 1px solid var(--line); color: #78909b; font-size: 11px; letter-spacing: .05em; text-transform: uppercase; }
footer p { margin: 0; }
footer p:last-child { justify-self: end; }
.footer-brand { color: var(--text); font-size: 16px; letter-spacing: normal; text-transform: none; }

@media (max-width: 840px) {
  :root { --page: min(100% - 32px, 680px); }
  .site-header { grid-template-columns: 1fr auto; height: 72px; }
  nav { display: none; }
  .hero { min-height: 720px; }
  .hero-content { padding-top: 94px; }
  h1 { font-size: clamp(46px, 13vw, 72px); }
  .hero-shade { background: linear-gradient(90deg, rgba(4,14,24,.96), rgba(4,14,24,.44)), linear-gradient(0deg, rgba(4,14,24,.8), transparent); }
  .hero-facts { left: 16px; right: 16px; bottom: 28px; }
  .hero-facts div { min-width: 0; flex: 1; padding: 0 13px; }
  .intro, .principles, .operations { grid-template-columns: 1fr; gap: 52px; }
  .section { padding: 90px 0; }
  .capabilities { grid-template-columns: 1fr; }
  .capabilities article { min-height: 230px; border-left: 0; border-top: 1px solid var(--line); }
  .capabilities article:first-child { border-top: 0; }
  .capabilities h3 { margin-top: 55px; }
  .operations { padding: 42px 30px; }
  .signal { height: 160px; }
  footer { grid-template-columns: 1fr auto; }
  footer p:nth-child(2) { display: none; }
}

@media (max-width: 520px) {
  .service-state { font-size: 0; }
  .hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); padding: 14px 8px; }
  .hero-facts div { padding: 0 8px; }
  .hero-facts dd { font-size: 11px; }
  .lead { font-size: 16px; }
  .operations { padding: 34px 22px; }
}

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

/* Accessible navigation and expandable FAQ */
.skip-link { position: absolute; z-index: 10; left: 16px; top: -100px; padding: 12px 16px; background: #eef5f6; color: #07111b; }
.skip-link:focus { top: 12px; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 5px; }
.faq { border-top: 1px solid var(--line); padding-top: 100px; }
.faq h2 { margin-bottom: 48px; }
.faq-list { max-width: 900px; }
.faq details { border-bottom: 1px solid var(--line); padding: 21px 0; }
.faq summary { cursor: pointer; font-size: 18px; font-weight: 500; padding-right: 25px; }
.faq details p { max-width: 760px; color: var(--muted); margin: 18px 0 3px; font-size: 15px; }
@media (max-width: 520px) { .faq { padding-top: 75px; } .faq summary { font-size: 16px; } }