:root {
  --ink: #0a0c0b;
  --paper: #f2f1ea;
  --muted: #777d76;
  --line: rgba(10, 12, 11, 0.17);
  --acid: #b8ff21;
  --green: #183d2a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 72px;
  padding: 0 4vw;
  color: #f7f7f1;
  background: rgba(10, 12, 11, 0.96);
  border-bottom: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(12px);
}
.brand { display: flex; gap: 12px; align-items: center; font-size: 13px; font-weight: 800; letter-spacing: .08em; text-decoration: none; }
.brand-mark { width: 12px; height: 12px; background: var(--acid); transform: rotate(45deg); }
nav { display: flex; gap: 30px; }
nav a { font-size: 12px; font-weight: 700; text-decoration: none; opacity: .72; }
nav a:hover { opacity: 1; }
.status { justify-self: end; padding: 10px 12px; border: 1px solid rgba(184,255,33,.45); font: 700 10px/1 monospace; letter-spacing: .09em; }
.status i { display: inline-block; width: 6px; height: 6px; margin-right: 7px; border-radius: 50%; background: var(--acid); }

.hero {
  min-height: calc(100vh - 72px);
  padding: 9vh 4vw 0;
  color: #f7f7f1;
  background:
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px) 0 0 / 64px 64px,
    radial-gradient(circle at 72% 32%, rgba(184,255,33,.16), transparent 27%),
    var(--ink);
  overflow: hidden;
}
.eyebrow, .section-heading > span { color: var(--acid); font: 700 11px/1.2 monospace; letter-spacing: .16em; }
h1 { max-width: 1050px; margin: 28px 0 22px; font-size: clamp(64px, 10vw, 150px); line-height: .84; letter-spacing: -.075em; text-transform: uppercase; }
h1 span { color: var(--acid); }
.hero-copy { max-width: 700px; margin: 0; color: rgba(255,255,255,.67); font-size: clamp(18px, 2vw, 25px); line-height: 1.45; }
.hero-actions { display: flex; gap: 12px; margin-top: 38px; }
.primary, .secondary { padding: 17px 22px; font-size: 12px; font-weight: 800; letter-spacing: .04em; text-decoration: none; }
.primary { color: var(--ink); background: var(--acid); }
.secondary { border: 1px solid rgba(255,255,255,.25); }
.proof-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin: 8vh -4vw 0; border-top: 1px solid rgba(255,255,255,.16); }
.proof-strip div { padding: 24px 4vw 28px; border-right: 1px solid rgba(255,255,255,.16); }
.proof-strip dt { color: var(--acid); font: 700 clamp(26px, 4vw, 52px)/1 monospace; }
.proof-strip dd { margin: 10px 0 0; color: rgba(255,255,255,.55); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }

.section { padding: 120px 4vw; border-bottom: 1px solid var(--line); }
.section.dark { color: #f7f7f1; background: #101311; }
.section-heading { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 30px; align-items: start; margin-bottom: 70px; }
.section-heading h2 { margin: 0; font-size: clamp(38px, 5vw, 76px); line-height: .96; letter-spacing: -.055em; }
.section-heading p { margin: 0; color: var(--muted); line-height: 1.65; }
.dark .section-heading p { color: rgba(255,255,255,.48); }

.architecture { display: grid; grid-template-columns: 1fr 7vw 1.25fr 7vw 1.25fr 7vw 1fr; align-items: center; padding: 34px; background: #e9e8df; border: 1px solid var(--line); }
.node { min-height: 122px; display: flex; flex-direction: column; justify-content: center; padding: 20px; background: var(--paper); border: 1px solid var(--line); }
.node small { margin-bottom: 16px; color: var(--green); font: 700 10px monospace; }
.node strong { margin-bottom: 8px; font-size: 17px; }
.node span { color: var(--muted); font-size: 12px; line-height: 1.5; }
.node.core { color: var(--ink); background: var(--acid); border-color: var(--ink); }
.node.core span { color: rgba(10,12,11,.65); }
.node-stack { display: grid; gap: 10px; }
.connector { height: 1px; background: var(--ink); }
.branch { display: grid; gap: 47px; }
.branch span { height: 1px; background: var(--ink); }

.capability-grid, .asset-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability-grid article, .asset-grid article { min-height: 220px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability-grid article > span { color: var(--green); font: 700 10px monospace; letter-spacing: .14em; }
.capability-grid h3 { margin: 45px 0 12px; font-size: 24px; letter-spacing: -.03em; }
.capability-grid p, .asset-grid p { color: var(--muted); line-height: 1.6; }

.evidence-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; }
.terminal { border: 1px solid rgba(255,255,255,.19); background: #080a09; }
.terminal-bar { display: flex; align-items: center; gap: 7px; padding: 14px 18px; border-bottom: 1px solid rgba(255,255,255,.14); }
.terminal-bar i { width: 7px; height: 7px; border-radius: 50%; background: rgba(255,255,255,.35); }
.terminal-bar span { margin-left: auto; color: rgba(255,255,255,.4); font: 10px monospace; }
pre { margin: 0; padding: 34px; overflow: auto; color: var(--acid); font: 13px/1.9 monospace; }
.validation-list { border-top: 1px solid rgba(255,255,255,.16); }
.validation-list article { padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.validation-list b { font-size: 18px; }
.validation-list p { color: rgba(255,255,255,.5); line-height: 1.65; }
.validation-list .boundary b { color: #ffb463; }

.asset-grid article strong { display: block; margin-bottom: 60px; font-size: 21px; }
.closing { display: grid; grid-template-columns: 2fr 1fr; gap: 10vw; margin-top: 100px; padding: 55px; color: var(--ink); background: var(--acid); }
.closing span { font: 700 10px monospace; letter-spacing: .15em; }
.closing h2 { margin: 24px 0 0; max-width: 770px; font-size: clamp(38px, 5vw, 70px); line-height: .98; letter-spacing: -.055em; }
.closing p { align-self: end; line-height: 1.6; }
footer { display: flex; justify-content: space-between; padding: 24px 4vw; color: rgba(255,255,255,.5); background: var(--ink); font: 10px monospace; letter-spacing: .12em; }

@media (max-width: 900px) {
  .topbar { grid-template-columns: 1fr auto; }
  nav { display: none; }
  .hero { min-height: auto; padding-top: 80px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 80px 5vw; }
  .section-heading { grid-template-columns: 1fr; }
  .architecture { grid-template-columns: 1fr; gap: 10px; }
  .connector { width: 1px; height: 28px; justify-self: center; }
  .branch { display: none; }
  .capability-grid, .asset-grid { grid-template-columns: 1fr; }
  .evidence-layout, .closing { grid-template-columns: 1fr; }
  .closing { padding: 34px; }
}

@media (max-width: 520px) {
  .topbar { padding: 0 18px; }
  .status { display: none; }
  h1 { font-size: 56px; }
  .proof-strip { grid-template-columns: 1fr; }
  .proof-strip div { padding-left: 6vw; }
  .section { padding-left: 6vw; padding-right: 6vw; }
}