:root {
  --bg: #070b0d;
  --surface: #0c1215;
  --surface-2: #11191d;
  --text: #edf4ef;
  --muted: #9aada3;
  --line: #2b383d;
  --line-strong: #45575d;
  --accent: #62e7a1;
  --info: #7fbdf6;
  --warn: #f2c66d;
  --stop: #ff8585;
  --max: 1480px;
  --mono: Consolas, "Cascadia Mono", "Courier New", monospace;
  --sans: "Segoe UI", Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
}
a { color: inherit; text-underline-offset: 0.22em; }
a:hover { color: var(--accent); }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--info); outline-offset: 3px; }
.skip-link {
  position: absolute;
  left: 1rem;
  top: -8rem;
  z-index: 1000;
  padding: .8rem 1rem;
  background: var(--text);
  color: var(--bg);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  min-height: 64px;
  padding: 0 2rem;
  background: #090e11;
  border-bottom: 1px solid var(--line);
}
.brand a {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: .06em;
}
.site-header nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.site-header nav a { color: var(--muted); font-size: .93rem; text-decoration: none; }
.site-header nav a:hover { color: var(--text); text-decoration: underline; }
.site-header button {
  min-height: 42px;
  padding: .55rem .85rem;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
.site-header button:hover { background: var(--surface-2); border-color: var(--accent); }

main { width: min(100%, var(--max)); margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(320px, .8fr);
  gap: clamp(3rem, 6vw, 7rem);
  padding: clamp(5rem, 9vw, 9rem) 2rem 4rem;
  border-bottom: 1px solid var(--line);
}
.hero-copy { align-self: end; }
h1, h2, h3, h4 { margin-top: 0; color: var(--text); text-wrap: balance; }
h1 {
  margin-bottom: 1.1rem;
  font-size: clamp(3.8rem, 10vw, 8.4rem);
  line-height: .88;
  letter-spacing: -.065em;
}
.hero-lede {
  max-width: 800px;
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: clamp(1.35rem, 2.3vw, 2.1rem);
  font-weight: 700;
}
.hero-text { max-width: 780px; margin: 0; color: var(--muted); font-size: 1.08rem; }
.snapshot {
  margin: 0;
  align-self: end;
  border-left: 2px solid var(--accent);
  padding-left: 1.4rem;
}
.snapshot-row {
  display: grid;
  grid-template-columns: minmax(120px, .8fr) minmax(0, 1.2fr);
  gap: 1rem;
  padding: .7rem 0;
  border-bottom: 1px solid var(--line);
}
.snapshot dt { color: var(--muted); }
.snapshot dd { margin: 0; overflow-wrap: anywhere; font-family: var(--mono); font-size: .88rem; }
.snapshot .status-value { color: var(--warn); font-family: var(--sans); font-weight: 700; }

.proof-strip { padding: 0 2rem; border-bottom: 1px solid var(--line); }
#proof-points { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-point { min-height: 140px; padding: 1.6rem 1.4rem; border-left: 1px solid var(--line); }
.proof-point:last-child { border-right: 1px solid var(--line); }
.proof-value { display: block; font-family: var(--mono); font-size: clamp(1.8rem, 3vw, 3rem); color: var(--accent); }
.proof-label { display: block; margin-top: .35rem; color: var(--muted); font-size: .92rem; }

.content-section { padding: clamp(4.5rem, 7vw, 7rem) 2rem; border-bottom: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .75fr); gap: 3rem; align-items: end; margin-bottom: 3rem; }
.section-heading h2 { margin-bottom: 0; font-size: clamp(2rem, 4vw, 4rem); line-height: 1.02; letter-spacing: -.04em; }
.section-heading p { margin: 0; color: var(--muted); }
.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 6rem); }
h3 { font-size: 1.35rem; margin-bottom: 1rem; }
h4 { margin: 2rem 0 .8rem; font-size: 1rem; }
p { max-width: 78ch; }
.plain-list { margin: 1.2rem 0 0; padding-left: 1.2rem; }
.plain-list li { margin: .55rem 0; color: var(--muted); }
.data-block { margin-top: 4rem; }
.definition-rows { border-top: 1px solid var(--line-strong); }
.definition-row { display: grid; grid-template-columns: minmax(120px, .32fr) minmax(0, 1fr); gap: 2rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.definition-row dt { font-family: var(--mono); font-weight: 700; color: var(--info); }
.definition-row dd { margin: 0; color: var(--muted); }
.control-chain { list-style: none; margin: 0; padding: 0; counter-reset: chain; border-top: 1px solid var(--line-strong); }
.control-chain li { counter-increment: chain; display: grid; grid-template-columns: 3rem 1fr; align-items: center; gap: 1rem; padding: .72rem 0; border-bottom: 1px solid var(--line); }
.control-chain li::before { content: counter(chain, decimal-leading-zero); font-family: var(--mono); color: var(--accent); }

.timeline { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line-strong); }
.timeline-item { display: grid; grid-template-columns: 170px 125px minmax(0, 1fr); gap: 2rem; padding: 1.45rem 0; border-bottom: 1px solid var(--line); }
.timeline-gate { font-family: var(--mono); font-weight: 700; }
.timeline-state { font-family: var(--mono); font-size: .88rem; font-weight: 700; }
.state-sealed, .state-pass { color: var(--accent); }
.state-stop, .state-safe-stop { color: var(--stop); }
.state-parked, .state-frozen { color: var(--warn); }
.timeline-detail p { margin: 0 0 .45rem; }
.timeline-authority { color: var(--muted); font-family: var(--mono); font-size: .82rem; overflow-wrap: anywhere; }

.table-wrap { overflow-x: auto; border-top: 1px solid var(--line-strong); }
table { width: 100%; border-collapse: collapse; min-width: 900px; }
th, td { padding: 1rem .85rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { color: var(--text); font-size: .86rem; font-weight: 650; }
td { color: var(--muted); }
td:first-child, td:nth-child(2) { font-family: var(--mono); }
.result-pass { color: var(--accent); font-weight: 700; }
.result-stop { color: var(--stop); font-weight: 700; }
.result-recovery { color: var(--warn); font-weight: 700; }
.warning-block { margin-top: 3rem; padding: 1.5rem 1.5rem 1.2rem; border: 1px solid #6a4c31; border-left: 4px solid var(--warn); background: #110f0b; }
.warning-block p { color: #d5c8ab; }
.code-list { margin: 1rem 0 0; padding-left: 1.2rem; }
.code-list li { margin: .5rem 0; font-family: var(--mono); font-size: .9rem; overflow-wrap: anywhere; }

.sidequest-list { border-top: 1px solid var(--line-strong); }
.sidequest-row { display: grid; grid-template-columns: minmax(210px, .55fr) minmax(150px, .28fr) minmax(0, 1fr); gap: 2rem; padding: 1.2rem 0; border-bottom: 1px solid var(--line); }
.sidequest-row h3 { margin: 0; font-size: 1rem; }
.sidequest-state { font-family: var(--mono); color: var(--info); font-size: .86rem; }
.sidequest-row p { margin: 0; color: var(--muted); }

.roadmap-table-wrap table { min-width: 720px; }
.roadmap-table-wrap td:first-child { color: var(--info); font-weight: 700; }
.roadmap-table-wrap tr:first-child td { background: #0e1713; color: var(--text); }
.follow-on { margin-top: 4rem; }
.numbered-list { margin: 0; padding-left: 1.4rem; }
.numbered-list li { margin: .7rem 0; color: var(--muted); }
.assurance-rows .definition-row { grid-template-columns: minmax(160px, .3fr) 1fr; }
.resume-list { counter-reset: resume; list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line-strong); }
.resume-list li { counter-increment: resume; display: grid; grid-template-columns: 3.5rem minmax(0, 1fr); gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.resume-list li::before { content: "R" counter(resume); font-family: var(--mono); color: var(--accent); font-weight: 700; }
.next-gate { margin-top: 2.4rem; padding: 1.4rem 0 0; border-top: 2px solid var(--accent); }
.next-gate strong { display: block; color: var(--accent); font-size: clamp(1.3rem, 2.5vw, 2rem); }
.next-gate code { display: block; margin-top: .65rem; color: var(--muted); font-family: var(--mono); overflow-wrap: anywhere; }

.public-note { display: flex; justify-content: space-between; gap: 2rem; padding: 1.4rem 2rem; color: var(--muted); border-bottom: 1px solid var(--line); font-size: .88rem; }
.public-note p { margin: 0; }
footer { width: min(100%, var(--max)); margin: 0 auto; padding: 3rem 2rem 5rem; color: var(--muted); }
footer p { margin: 0; }
footer strong { color: var(--text); }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; gap: 1rem; padding: .75rem 1rem; }
  .site-header nav { grid-column: 1 / -1; order: 3; padding-top: .65rem; border-top: 1px solid var(--line); }
  .hero { grid-template-columns: 1fr; padding-left: 1rem; padding-right: 1rem; }
  .snapshot { max-width: 720px; }
  .proof-strip { padding: 0 1rem; }
  #proof-points { grid-template-columns: 1fr 1fr; }
  .proof-point:nth-child(2) { border-right: 1px solid var(--line); }
  .content-section { padding-left: 1rem; padding-right: 1rem; }
  .section-heading, .two-column { grid-template-columns: 1fr; gap: 1.5rem; }
  .timeline-item { grid-template-columns: 130px 110px 1fr; gap: 1rem; }
  .sidequest-row { grid-template-columns: 1fr; gap: .45rem; }
  .public-note { flex-direction: column; padding-left: 1rem; padding-right: 1rem; }
}

@media (max-width: 640px) {
  .site-header { position: static; }
  .site-header nav { gap: .7rem 1.1rem; }
  .site-header nav a { min-height: 44px; display: inline-flex; align-items: center; }
  .site-header button { min-height: 44px; }
  .hero { padding-top: 4rem; }
  h1 { font-size: clamp(3.2rem, 20vw, 5rem); }
  .snapshot-row { grid-template-columns: 1fr; gap: .2rem; }
  #proof-points { grid-template-columns: 1fr; }
  .proof-point, .proof-point:nth-child(2), .proof-point:last-child { border-right: 1px solid var(--line); }
  .timeline-item { grid-template-columns: 1fr; gap: .4rem; padding: 1.2rem 0; }
  .definition-row { grid-template-columns: 1fr; gap: .35rem; }
  .assurance-rows .definition-row { grid-template-columns: 1fr; }
}

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