:root {
  --ink: hsl(210 30% 94%);
  --ink-strong: white;
  --muted: hsl(215 14% 68%);
  --dim: hsl(216 12% 52%);
  --night: hsl(224 36% 7%);
  --surface: hsl(222 28% 12%);
  --surface-hi: hsl(222 25% 16%);
  --line: hsl(219 20% 23%);
  --cyan: hsl(187 93% 47%);
  --mint: hsl(159 75% 48%);
  --amber: hsl(38 95% 58%);
  --red: hsl(0 82% 66%);
  --ok-soft: hsl(159 75% 48% / .12);
  --warn-soft: hsl(38 95% 58% / .12);
  --red-soft: hsl(0 82% 66% / .12);
  --radius: 18px;
  --radius-sm: 11px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    linear-gradient(hsl(224 36% 7% / .94), hsl(224 36% 7% / .98)),
    repeating-linear-gradient(90deg, transparent 0 79px, hsl(187 93% 47% / .035) 80px),
    repeating-linear-gradient(0deg, transparent 0 79px, hsl(187 93% 47% / .035) 80px),
    var(--night);
  color: var(--ink);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--ink-strong); }
button, a { -webkit-tap-highlight-color: transparent; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: auto; padding-bottom: 72px; }

header.app {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand > span:last-child { display: grid; }
.brand strong { color: var(--ink-strong); font-size: 15px; letter-spacing: -.01em; }
.brand small { color: var(--dim); font-size: 11px; }
.logo {
  width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px;
  background: linear-gradient(145deg, var(--cyan), var(--mint)); color: var(--night);
  font-weight: 900; box-shadow: 0 0 30px hsl(187 93% 47% / .22);
}

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  align-items: center;
  gap: 64px;
  padding: 70px 4% 62px;
  overflow: hidden;
}
.eyebrow { margin: 0 0 10px; color: var(--cyan); font: 700 11px/1.2 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { margin: 0; color: var(--ink-strong); font-size: clamp(42px, 6vw, 76px); line-height: .98; letter-spacing: -.055em; }
.hero h1 span { color: transparent; -webkit-text-stroke: 1px hsl(187 93% 70% / .7); }
.lede { max-width: 700px; margin: 28px 0 24px; color: var(--muted); font-size: clamp(16px, 2vw, 19px); }
.text-link { display: inline-flex; gap: 10px; align-items: center; font-weight: 700; }

.hero-orbit { position: relative; aspect-ratio: 1; max-width: 410px; width: 100%; justify-self: center; }
.orbit-ring { position: absolute; inset: 7%; border: 1px solid hsl(187 93% 47% / .22); border-radius: 50%; }
.ring-a { animation: orbit 28s linear infinite; }
.ring-a::before, .ring-b::after {
  content: ""; position: absolute; width: 12px; height: 12px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 22px var(--cyan);
}
.ring-a::before { top: 11%; left: 12%; }
.ring-b { inset: 20%; border-style: dashed; animation: orbit 20s linear infinite reverse; }
.ring-b::after { bottom: -6px; left: 50%; background: var(--mint); box-shadow: 0 0 22px var(--mint); }
.orbit-core {
  position: absolute; inset: 34%; border-radius: 50%; display: grid; place-content: center; text-align: center;
  background: radial-gradient(circle at 35% 30%, hsl(187 93% 47% / .2), var(--surface));
  border: 1px solid hsl(187 93% 47% / .5); box-shadow: 0 0 60px hsl(187 93% 47% / .12);
}
.orbit-core span { color: var(--cyan); font: 10px var(--mono); letter-spacing: .14em; }
.orbit-core strong { margin-top: 5px; color: white; font: 700 16px/1.05 var(--mono); }
.orbit-label { position: absolute; padding: 5px 9px; border: 1px solid var(--line); border-radius: 99px; background: var(--surface); color: var(--muted); font: 10px var(--mono); }
.label-browser { top: 5%; left: 12%; }.label-domain { right: 0; top: 48%; }.label-key { left: 8%; bottom: 10%; }
@keyframes orbit { to { transform: rotate(360deg); } }

.banner {
  display: flex; gap: 16px; align-items: flex-start; padding: 18px 20px; margin-bottom: 76px;
  border: 1px solid var(--line); border-left: 3px solid var(--dim); border-radius: var(--radius-sm); background: hsl(222 28% 12% / .85);
}
.banner .ico { width: 30px; color: var(--dim); font-size: 22px; line-height: 1; }
.banner h2 { margin: 0 0 3px; color: var(--ink-strong); font-size: 15px; }
.banner p { margin: 0; color: var(--muted); font-size: 13px; }
.banner.attested, .banner.ok { border-left-color: var(--mint); background: var(--ok-soft); }
.banner.warn, .banner.not-tee { border-left-color: var(--amber); background: var(--warn-soft); }
.banner.failed, .banner.err, .banner.simulated { border-left-color: var(--red); background: var(--red-soft); }

.block { margin-top: 96px; scroll-margin-top: 30px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 24px; }
.section-heading h2 { margin: 0; color: var(--ink-strong); font-size: clamp(27px, 4vw, 42px); line-height: 1.08; letter-spacing: -.035em; }
.section-heading > p { max-width: 460px; margin: 0; color: var(--muted); font-size: 14px; }

.proof-chain { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.proof-chain li { position: relative; min-height: 250px; padding: 22px 18px; background: hsl(222 28% 12% / .8); border-right: 1px solid var(--line); transition: background .25s, box-shadow .25s; }
.proof-chain li:last-child { border-right: 0; }
.proof-chain li::after { content: "→"; position: absolute; z-index: 2; top: 25px; right: -9px; color: var(--dim); background: var(--surface); }
.proof-chain li:last-child::after { display: none; }
.proof-chain li.passed { background: linear-gradient(160deg, var(--ok-soft), hsl(222 28% 12% / .95)); box-shadow: inset 0 3px var(--mint); }
.proof-chain li.failed { background: var(--red-soft); box-shadow: inset 0 3px var(--red); }
.step-no { display: block; margin-bottom: 48px; color: var(--dim); font: 11px var(--mono); }
.proof-chain li.passed .step-no { color: var(--mint); }
.proof-chain strong { display: block; margin-bottom: 10px; color: var(--ink-strong); font-size: 17px; }
.proof-chain p { min-height: 66px; margin: 0 0 18px; color: var(--muted); font-size: 12px; }
.proof-chain code { color: var(--cyan); font-size: 10px; }

.trust-flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr) 34px) minmax(0, 1fr); align-items: stretch; }
.trust-node { min-height: 190px; padding: 18px 14px; border: 1px solid hsl(38 95% 58% / .35); border-radius: var(--radius-sm); background: linear-gradient(155deg, hsl(38 95% 58% / .08), var(--surface)); }
.trust-node span { color: var(--amber); font: 9px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.trust-node strong { display: block; margin-top: 32px; color: var(--ink-strong); font-size: 16px; }
.trust-node p { margin: 8px 0 0; color: var(--muted); font-size: 11px; }
.trust-node.root { box-shadow: inset 0 3px var(--amber); }
.trust-node.binding { border-color: hsl(187 93% 47% / .42); background: linear-gradient(155deg, hsl(187 93% 47% / .09), var(--surface)); }
.trust-node.binding span { color: var(--cyan); }
.trust-node.policy { border-color: hsl(159 75% 48% / .38); background: linear-gradient(155deg, hsl(159 75% 48% / .08), var(--surface)); }
.trust-node.policy span { color: var(--mint); }
.trust-arrow { display: grid; place-content: center; color: var(--amber); text-align: center; font-size: 18px; }
.trust-arrow small { display: block; color: var(--dim); font: 8px var(--mono); }
.trust-legend { display: grid; grid-template-columns: 2fr 1fr; gap: 10px; margin-top: 12px; }
.trust-legend span { padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--muted); font-size: 11px; }
.trust-legend i { display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; }
.trust-legend strong { color: var(--ink); }
.appraiser-key { background: var(--amber); }.browser-key { background: var(--cyan); }
.scope-heading { margin-top: 68px; }

.scope-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.scope-card { display: flex; gap: 18px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.scope-card h3 { margin: 1px 0 14px; color: var(--ink-strong); font-size: 16px; }
.scope-card ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 13px; }
.scope-card li + li { margin-top: 6px; }
.scope-icon { width: 34px; height: 34px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; font-weight: 900; }
.verified-scope { border-color: hsl(159 75% 48% / .35); }.verified-scope .scope-icon { color: var(--mint); background: var(--ok-soft); }
.appraisal-scope { border-color: hsl(38 95% 58% / .35); }.appraisal-scope .scope-icon { color: var(--amber); background: var(--warn-soft); }
.scope-note { margin: 16px 0 0; padding: 13px 16px; border-left: 2px solid var(--amber); background: hsl(38 95% 58% / .07); color: var(--muted); font-size: 12.5px; }
.scope-note strong { color: var(--ink); }

.boundary-map { display: grid; grid-template-columns: .72fr 80px 1.55fr 90px .85fr; align-items: stretch; gap: 0; }
.boundary-zone { min-height: 180px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.boundary-zone > strong { display: block; margin-top: 28px; color: var(--ink-strong); font-size: 17px; }
.boundary-zone > p { color: var(--muted); font-size: 12px; }
.zone-label { color: var(--cyan); font: 9px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.boundary-arrow { display: grid; place-content: center; gap: 4px; color: var(--cyan); text-align: center; font-size: 22px; }
.boundary-arrow span { color: var(--dim); font: 9px var(--mono); }
.boundary-arrow.restricted { color: var(--amber); }
.tee-zone { border-color: hsl(187 93% 47% / .42); background: linear-gradient(145deg, hsl(187 93% 47% / .07), var(--surface)); }
.tee-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
.payload-box, .platform-box { padding: 14px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: hsl(224 36% 7% / .55); }
.payload-box { border-color: hsl(0 82% 66% / .35); }
.platform-box { border-color: hsl(159 75% 48% / .3); }
.tee-grid strong { display: block; color: var(--ink); font-size: 12px; }
.tee-grid small { display: block; margin-top: 7px; color: var(--dim); font-size: 10px; line-height: 1.55; }

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.card { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.card h3 { margin: 0 0 13px; color: var(--cyan); font: 700 10px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 8px 12px; margin: 0; font-size: 12px; }
.kv dt { color: var(--dim); }.kv dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }
.mono, code, pre { font-family: var(--mono); }.mono, code { font-size: 11.5px; }
.muted { color: var(--muted); }.dim { color: var(--dim); font-size: 11.5px; }.fact-note { margin-top: 8px; }

.badge, .pill { display: inline-flex; align-items: center; width: fit-content; border: 1px solid var(--line); border-radius: 99px; background: var(--surface-hi); color: var(--muted); font: 10px var(--mono); white-space: nowrap; }
.badge { padding: 5px 9px; }.pill { padding: 3px 7px; }
.badge.ok, .pill.on { color: var(--mint); border-color: hsl(159 75% 48% / .38); background: var(--ok-soft); }
.badge.warn { color: var(--amber); border-color: hsl(38 95% 58% / .38); background: var(--warn-soft); }
.badge.err { color: var(--red); border-color: hsl(0 82% 66% / .38); background: var(--red-soft); }
.pillrow { display: flex; justify-content: flex-end; gap: 7px; flex-wrap: wrap; }

.verify-card { padding: 26px; border-color: hsl(187 93% 47% / .32); }
.intro-copy { max-width: 760px; margin: 0; color: var(--muted); }
.action-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.btn { padding: 11px 17px; border: 1px solid transparent; border-radius: 9px; background: var(--cyan); color: var(--night); font: 750 13px var(--sans); cursor: pointer; }
.btn:hover { filter: brightness(1.1); }.btn:disabled { cursor: progress; opacity: .55; }
.btn.ghost { border-color: var(--line); background: var(--surface-hi); color: var(--ink); }
.steps { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 8px; }
.steps li { display: flex; gap: 12px; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: hsl(224 36% 7% / .5); }
.mark { width: 23px; height: 23px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: var(--surface-hi); color: var(--dim); font-weight: 800; }
.mark.ok { background: var(--ok-soft); color: var(--mint); }.mark.err { background: var(--red-soft); color: var(--red); }
.steps .body { min-width: 0; }.steps .t { color: var(--ink); font-size: 13px; }.steps .d { color: var(--muted); font-size: 11px; overflow-wrap: anywhere; }
.compare { margin-top: 14px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-sm); font: 10.5px var(--mono); }
.compare .row { display: grid; grid-template-columns: 150px 1fr; border-bottom: 1px solid var(--line); }.compare .row:last-child { border: 0; }
.compare .lbl { padding: 10px; border-right: 1px solid var(--line); background: hsl(224 36% 7% / .5); color: var(--dim); }
.compare .val { padding: 10px; overflow-wrap: anywhere; }.compare .match { color: var(--mint); }.compare .differ { color: var(--red); }
.secret { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 20px; padding: 18px; border: 1px dashed hsl(159 75% 48% / .38); border-radius: var(--radius); background: var(--ok-soft); }
.secret.locked { border-color: var(--line); background: var(--surface); }.secret .lock { font-size: 22px; }.secret code.revealed { padding: 6px 9px; border-radius: 7px; background: var(--night); color: var(--mint); }

.developer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.developer-grid article { padding: 20px; border-top: 2px solid var(--cyan); background: var(--surface); }
.developer-grid article > span { color: var(--dim); font: 11px var(--mono); }.developer-grid h3 { margin: 32px 0 8px; color: var(--ink-strong); font-size: 15px; }.developer-grid p { margin: 0; color: var(--muted); font-size: 12px; }
.code-card { margin-top: 16px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: hsl(224 36% 5%); }
.code-head { display: flex; justify-content: space-between; padding: 11px 15px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; }.code-head code { color: var(--cyan); }
.code-card pre { margin: 0; padding: 20px; overflow: auto; color: hsl(210 25% 82%); font-size: 11px; line-height: 1.65; }

details.raw { margin-top: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
details.raw summary { padding: 15px 18px; cursor: pointer; color: var(--muted); font-size: 12px; }
details.raw pre { max-height: 440px; margin: 0; padding: 0 18px 18px; overflow: auto; color: var(--muted); font-size: 10.5px; }
footer.app { display: flex; justify-content: space-between; gap: 20px; margin-top: 80px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--dim); font-size: 11px; }
footer.app strong { color: var(--ink); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; }.orbit-ring { animation: none; } }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding: 70px 0; }.hero-orbit { max-width: 330px; }
  .proof-chain { grid-template-columns: 1fr 1fr; }.proof-chain li { min-height: 205px; border-bottom: 1px solid var(--line); }.proof-chain li::after { display: none; }
  .proof-chain li:last-child { grid-column: 1 / -1; min-height: auto; }
  .trust-flow { grid-template-columns: 1fr; gap: 8px; }.trust-node { min-height: auto; }.trust-node strong { margin-top: 18px; }.trust-arrow { min-height: 30px; transform: rotate(90deg); }.trust-arrow small { display: none; }
  .boundary-map { grid-template-columns: 1fr; gap: 10px; }.boundary-arrow { min-height: 48px; transform: rotate(90deg); }.boundary-arrow span { display: none; }
}
@media (max-width: 680px) {
  .wrap { width: min(100% - 24px, 1180px); }.pillrow { display: none; }
  .section-heading { display: block; }.section-heading > p { margin-top: 12px; }
  .scope-grid, .grid, .developer-grid, .trust-legend { grid-template-columns: 1fr; }
  .proof-chain { grid-template-columns: 1fr; }.proof-chain li:last-child { grid-column: auto; }
  .proof-chain li { min-height: auto; }.step-no { margin-bottom: 20px; }.proof-chain p { min-height: auto; }
  .tee-grid { grid-template-columns: 1fr; }.compare .row { grid-template-columns: 1fr; }.compare .lbl { border-right: 0; border-bottom: 1px solid var(--line); }
  footer.app { display: grid; }.hero { gap: 24px; }.hero-orbit { max-width: 280px; }
}