:root {
  --ink: #f4f2e9;
  --muted: #9aa59f;
  --line: rgba(211, 230, 219, 0.14);
  --panel: rgba(16, 29, 25, 0.78);
  --bg: #09110f;
  --green: #7cf5ad;
  --amber: #ffb35c;
  --red: #ff786f;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 8%, rgba(80, 191, 131, 0.13), transparent 27rem),
    radial-gradient(circle at 7% 42%, rgba(255, 179, 92, 0.08), transparent 24rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button, a { font: inherit; }
a { color: inherit; }
.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 20; opacity: .16;
  background-image: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255,255,255,.025) 3px);
}
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }

.nav {
  height: 76px; display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--line); position: relative; z-index: 2;
}
.brand { display: flex; gap: 12px; align-items: center; text-decoration: none; font-size: 12px; letter-spacing: .18em; font-weight: 800; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--green); color: var(--green); border-radius: 50%; letter-spacing: 0; }
.nav nav { display: flex; gap: 28px; }
.nav nav a { text-decoration: none; color: var(--muted); font-size: 13px; }
.nav nav a:hover, .nav nav a:focus-visible { color: var(--ink); }
.status { display: flex; gap: 8px; align-items: center; font: 11px ui-monospace, monospace; color: var(--green); text-transform: uppercase; letter-spacing: .08em; }
.status i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); }

.hero { padding: 98px 0 54px; }
.eyebrow { color: var(--green); text-transform: uppercase; letter-spacing: .18em; font: 700 11px ui-monospace, monospace; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 1000px; margin: 24px 0 26px; font-size: clamp(54px, 8.2vw, 108px); line-height: .91; letter-spacing: -.068em; font-weight: 770; }
h1 em { display: block; color: var(--amber); font-style: normal; }
.lede { max-width: 720px; color: #bac3bd; font-size: clamp(18px, 2vw, 23px); line-height: 1.55; }
.hero-actions { display: flex; gap: 12px; margin: 34px 0 72px; }
.button { padding: 13px 18px; border-radius: 3px; text-decoration: none; font-weight: 750; font-size: 14px; border: 1px solid var(--line); }
.button.primary { background: var(--green); color: #07110c; border-color: var(--green); }
.button.secondary:hover { border-color: var(--green); }
.route { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: center; gap: 18px; border-top: 1px solid var(--line); padding-top: 26px; }
.route div { display: grid; grid-template-columns: auto 1fr; column-gap: 12px; }
.route b { grid-row: 1 / 3; color: var(--amber); font: 12px ui-monospace, monospace; }
.route span { font-weight: 760; }
.route small { color: var(--muted); }
.route > i { color: #66716b; font-style: normal; }

.metrics { display: grid; grid-template-columns: repeat(6, 1fr); border: 1px solid var(--line); background: rgba(7,16,13,.56); }
.metrics article { padding: 25px 20px; border-right: 1px solid var(--line); }
.metrics article:last-child { border-right: 0; }
.metrics strong { display: block; font: 600 30px ui-monospace, monospace; letter-spacing: -.05em; }
.metrics span { display: block; color: var(--muted); font-size: 12px; margin-top: 5px; }
.metrics .accent strong { color: var(--green); }

.demo { padding: 130px 0 20px; }
.demo .section-copy { margin-bottom: 34px; }
.video-frame { border: 1px solid var(--line); background: #030806; padding: 10px; box-shadow: 0 28px 80px rgba(0,0,0,.28); }
.video-frame video { display: block; width: 100%; aspect-ratio: 16 / 9; background: #020605; }

.proof, .inspect { display: grid; grid-template-columns: .78fr 1.22fr; gap: 72px; padding: 130px 0; align-items: start; }
.section-copy h2, .reproduce h2 { font-size: clamp(36px, 5vw, 62px); line-height: 1.02; letter-spacing: -.045em; margin: 18px 0 22px; }
.section-copy > p { color: var(--muted); font-size: 17px; max-width: 560px; }
.checksum { overflow-wrap: anywhere; color: var(--cyan); font: 13px/1.5 ui-monospace, monospace; }
.question-list { display: grid; gap: 7px; margin-top: 30px; }
.question-list button, .timeline-tabs button {
  border: 1px solid var(--line); color: var(--muted); background: transparent;
  padding: 12px 14px; text-align: left; cursor: pointer; border-radius: 3px;
}
.question-list button[aria-pressed="true"], .question-list button:hover,
.timeline-tabs button[aria-selected="true"], .timeline-tabs button:hover { border-color: rgba(124,245,173,.55); color: var(--ink); background: rgba(124,245,173,.06); }

.recall-card, .file-window { border: 1px solid var(--line); background: var(--panel); box-shadow: 0 28px 80px rgba(0,0,0,.2); }
.recall-head, .file-window > header { min-height: 50px; display: flex; justify-content: space-between; align-items: center; padding: 0 18px; border-bottom: 1px solid var(--line); font: 11px ui-monospace, monospace; color: var(--muted); letter-spacing: .08em; }
.parity-pill { color: var(--green); border: 1px solid rgba(124,245,173,.4); padding: 5px 8px; border-radius: 99px; }
.query { font-size: 25px; font-weight: 700; padding: 28px 28px 16px; margin: 0; }
.answers { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 12px 28px 28px; }
.answers article { background: rgba(4,11,9,.62); border: 1px solid var(--line); min-height: 190px; padding: 18px; display: flex; flex-direction: column; }
.answers header { color: var(--muted); font: 11px ui-monospace, monospace; text-transform: uppercase; }
.answers header i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 7px; }
.source-dot { background: var(--amber); } .okf-dot { background: var(--green); }
.answers p { margin: 25px 0; font-size: 17px; }
.answers footer { margin-top: auto; color: var(--muted); font: 11px ui-monospace, monospace; text-transform: uppercase; }
.answers footer b { color: var(--green); }
.verdict { padding: 17px 28px; border-top: 1px solid var(--line); color: var(--green); font-weight: 700; }
.verdict span { display: inline-grid; place-items: center; margin-right: 8px; width: 22px; height: 22px; border: 1px solid currentColor; border-radius: 50%; }

.corrections { padding: 120px 0; border-top: 1px solid var(--line); }
.compact { max-width: 780px; }
.timeline-tabs { display: flex; gap: 8px; margin: 40px 0 16px; }
.timeline-panel { display: grid; grid-template-columns: 1fr auto 1fr; gap: 22px; align-items: stretch; }
.version { padding: 30px; background: rgba(16,29,25,.6); border: 1px solid var(--line); }
.version.old { opacity: .66; }
.version label { display: inline-block; font: 700 10px ui-monospace, monospace; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin-bottom: 18px; }
.version strong { display: block; font-size: 30px; line-height: 1.12; }
.version small { display: block; color: var(--muted); margin-top: 18px; }
.version.current { border-color: rgba(124,245,173,.45); }
.version.current label { color: var(--green); }
.arrow { align-self: center; color: var(--amber); font-size: 28px; }
.archive-note { grid-column: 1 / -1; color: var(--muted); font: 12px ui-monospace, monospace; padding-top: 8px; }
.archive-note b { color: var(--amber); }

.file-window { overflow: hidden; }
.traffic { display: flex; gap: 6px; }
.traffic i { width: 8px; height: 8px; border-radius: 50%; background: #647069; }
.traffic i:first-child { background: var(--red); } .traffic i:nth-child(2) { background: var(--amber); } .traffic i:last-child { background: var(--green); }
.file-path { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin: 0 14px; }
.copy, .copy-command { background: transparent; border: 1px solid var(--line); color: var(--muted); padding: 6px 10px; cursor: pointer; }
.copy:hover, .copy-command:hover { color: var(--green); border-color: var(--green); }
pre { margin: 0; padding: 28px; overflow: auto; color: #cddbd3; font: 13px/1.75 ui-monospace, SFMono-Regular, Consolas, monospace; }

.integrity { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 130px; }
.integrity article { padding: 30px; background: var(--bg); }
.integrity span { color: var(--green); font: 700 10px ui-monospace, monospace; letter-spacing: .12em; }
.integrity h3 { font-size: 21px; margin: 16px 0 11px; }
.integrity p { color: var(--muted); margin-bottom: 0; }

.reproduce { border: 1px solid rgba(255,179,92,.35); padding: 50px; background: linear-gradient(135deg, rgba(255,179,92,.09), rgba(124,245,173,.035)); margin-bottom: 80px; }
.reproduce h2 { max-width: 760px; margin-bottom: 34px; }
.command { display: flex; align-items: center; gap: 18px; background: #050a08; border: 1px solid var(--line); padding: 17px; }
.command code { flex: 1; overflow-wrap: anywhere; color: var(--green); font: 12px/1.6 ui-monospace, monospace; }
.disclosure { margin: 20px 0 0; color: var(--muted); font-size: 12px; max-width: 850px; }
.footer { display: flex; justify-content: space-between; gap: 24px; padding: 28px 0 48px; color: #68736d; border-top: 1px solid var(--line); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }

@media (max-width: 900px) {
  .nav nav { display: none; }
  .route { grid-template-columns: 1fr 1fr; }
  .route > i { display: none; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
  .metrics article:nth-child(3) { border-right: 0; }
  .metrics article:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .proof, .inspect { grid-template-columns: 1fr; gap: 40px; padding: 96px 0; }
  .timeline-panel { grid-template-columns: 1fr; }
  .arrow { transform: rotate(90deg); justify-self: center; }
  .archive-note { grid-column: 1; }
  .integrity { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .shell { width: min(calc(100% - 24px), var(--max)); }
  .status { display: none; }
  .hero { padding-top: 72px; }
  h1 { font-size: 52px; }
  .hero-actions, .timeline-tabs { flex-direction: column; }
  .route { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metrics article { border-bottom: 1px solid var(--line); }
  .metrics article:nth-child(odd) { border-right: 1px solid var(--line); }
  .metrics article:nth-child(even) { border-right: 0; }
  .answers { grid-template-columns: 1fr; padding: 10px 16px 20px; }
  .query { padding-inline: 16px; font-size: 21px; }
  .recall-head, .file-window > header { padding-inline: 12px; }
  .reproduce { padding: 28px 20px; }
  .command { align-items: flex-start; flex-direction: column; }
  .footer { flex-direction: column; }
}

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