:root {
  color-scheme: dark;
  --bg: #060708;
  --bg-soft: #0a0c0f;
  --panel: #0c0f13;
  --panel-soft: #11151a;
  --text: #f1f0eb;
  --muted: #9b9ea5;
  --line: rgba(255,255,255,.11);
  --line-soft: rgba(255,255,255,.06);
  --gold: #d8ad59;
  --gold-soft: rgba(216,173,89,.18);
  --blue: #7ebdff;
  --blue-soft: rgba(126,189,255,.14);
  --green: #80d889;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shell: min(1440px, calc(100% - 64px));
  --header-h: 74px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background:
    radial-gradient(circle at 80% 7%, rgba(126,189,255,.07), transparent 26%),
    radial-gradient(circle at 15% 18%, rgba(216,173,89,.045), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .18;
  background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 100% 56px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

a { color: inherit; text-decoration: none; }
button, textarea { font: inherit; }
button { color: inherit; }

.skip-link, .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.skip-link:focus {
  position: fixed;
  inset: 12px auto auto 12px;
  z-index: 100;
  width: auto;
  height: auto;
  clip: auto;
  margin: 0;
  padding: 12px 16px;
  background: var(--gold);
  color: #080808;
}

.shell { width: var(--shell); margin-inline: auto; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s cubic-bezier(.16,1,.3,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 0 max(24px, calc((100vw - 1440px) / 2));
  border-bottom: 1px solid var(--line-soft);
  background: rgba(6,7,8,.86);
  backdrop-filter: blur(22px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-symbol {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(216,173,89,.45);
  border-radius: 50%;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 23px;
}
.brand > span:last-child { display: grid; line-height: 1.05; }
.brand strong { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 8px; letter-spacing: .22em; text-transform: uppercase; }
.desktop-nav { justify-self: center; display: flex; gap: 28px; }
.desktop-nav a { position: relative; color: #c9cbd0; font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -13px; height: 1px; background: var(--gold); transition: right .25s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }
.gateway-state { display: grid; grid-template-columns: auto auto; align-items: center; column-gap: 8px; min-width: 132px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; }
.gateway-state i { grid-row: span 2; width: 7px; height: 7px; border-radius: 50%; background: #a38b54; }
.gateway-state.is-online i { background: var(--green); box-shadow: 0 0 12px rgba(128,216,137,.7); }
.gateway-state span { color: var(--muted); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
.gateway-state strong { font-size: 9px; }
.menu-button { display: none; border: 0; background: none; }
.mobile-menu { position: fixed; inset: var(--header-h) 0 auto; z-index: 45; padding: 18px 24px 30px; border-bottom: 1px solid var(--line); background: rgba(6,7,8,.98); }
.mobile-menu a { display: grid; grid-template-columns: 42px 1fr; align-items: center; padding: 15px 0; border-bottom: 1px solid var(--line-soft); font-family: var(--serif); font-size: 28px; }
.mobile-menu a span { color: var(--gold); font-family: var(--sans); font-size: 10px; }

.hero {
  min-height: calc(100svh - var(--header-h));
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(500px,.82fr);
  align-items: center;
  gap: clamp(58px, 7vw, 118px);
  padding: 105px 0 70px;
}
.eyebrow { margin: 0 0 25px; color: var(--gold); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.hero h1, .section-heading h2, .chat-intro h2, .principle h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: .94;
}
.hero h1 { font-size: clamp(72px, 7.4vw, 122px); }
em { color: var(--gold); font-style: normal; }
.hero-lead { max-width: 720px; margin: 30px 0 0; color: #d2d3d5; font-size: clamp(20px, 2vw, 30px); line-height: 1.45; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 40px; }
.button { display: inline-flex; min-height: 58px; align-items: center; justify-content: space-between; gap: 48px; padding: 0 20px; border: 1px solid rgba(216,173,89,.55); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; transition: .25s ease; }
.button.primary { background: var(--gold); color: #0a0a0a; }
.button:hover { transform: translateY(-2px); }
.text-link { display: inline-flex; align-items: center; gap: 16px; color: #d5d6d8; font-size: 11px; letter-spacing: .07em; text-transform: uppercase; }
.text-link span { color: var(--gold); }

.hero-system {
  position: relative;
  min-height: 620px;
  display: grid;
  place-items: center;
  isolation: isolate;
}
.hero-system::before { content: ""; position: absolute; width: 430px; height: 430px; border-radius: 50%; background: radial-gradient(circle, rgba(126,189,255,.11), transparent 62%); filter: blur(12px); }
.hero-orbit { position: absolute; border-radius: 50%; border: 1px solid var(--line); }
.orbit-outer { width: 520px; height: 520px; border-color: rgba(216,173,89,.27); animation: orbitPulse 6s ease-in-out infinite; }
.orbit-inner { width: 350px; height: 350px; border-color: rgba(126,189,255,.25); border-style: dashed; animation: orbitSpin 42s linear infinite; }
.hero-core {
  position: relative;
  z-index: 3;
  width: 190px;
  height: 190px;
  display: grid;
  place-content: center;
  text-align: center;
  border: 1px solid rgba(126,189,255,.55);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, rgba(126,189,255,.18), rgba(9,13,18,.95) 70%);
  box-shadow: 0 0 70px rgba(126,189,255,.12), inset 0 0 50px rgba(126,189,255,.08);
}
.hero-core small, .hero-core span, .hero-authority span, .hero-memory span { color: var(--muted); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; }
.hero-core strong { margin: 5px 0; font-family: var(--serif); font-size: 54px; font-weight: 400; }
.hero-core span { color: #c8d6e4; font-size: 8px; }
.hero-authority, .hero-memory { position: absolute; z-index: 4; min-width: 230px; padding: 15px 18px; border: 1px solid var(--line); background: rgba(8,10,12,.92); }
.hero-authority { top: 62px; left: 50%; transform: translateX(-50%); border-color: rgba(216,173,89,.5); }
.hero-authority strong { display: block; margin-top: 4px; font-family: var(--serif); font-size: 20px; font-weight: 400; }
.hero-memory { bottom: 68px; left: 50%; transform: translateX(-50%); text-align: center; }
.hero-memory small { display: block; margin-top: 5px; color: #d2d3d5; }
.hero-system > p { position: absolute; left: 50%; bottom: 0; width: 82%; transform: translateX(-50%); margin: 0; color: var(--muted); text-align: center; font-size: 12px; line-height: 1.7; }
.hero-boundary { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4,1fr); margin-top: 16px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-boundary span { padding: 17px 22px; border-right: 1px solid var(--line); color: var(--muted); font-size: 9px; letter-spacing: .1em; text-align: center; text-transform: uppercase; }
.hero-boundary span:last-child { border-right: 0; }

.architecture-section, .chat-section, .system-section { padding: 150px 0 80px; }
.section-heading { display: grid; grid-template-columns: minmax(170px,.3fr) minmax(0,1fr) minmax(280px,.42fr); align-items: end; gap: clamp(30px,6vw,90px); margin-bottom: 70px; }
.section-heading > p { margin: 0; color: var(--gold); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.section-heading > p span { display: inline-grid; width: 34px; height: 34px; place-items: center; margin-right: 12px; border: 1px solid rgba(216,173,89,.38); border-radius: 50%; }
.section-heading h2, .chat-intro h2, .principle h2 { font-size: clamp(56px,5.7vw,90px); }
.section-heading > div p, .chat-intro > p:last-child, .principle > p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.architecture-layout { display: grid; grid-template-columns: minmax(0,1fr) 380px; gap: 28px; align-items: stretch; }
.architecture-canvas {
  position: relative;
  min-height: 850px;
  padding: 55px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    radial-gradient(circle at 50% 32%, rgba(126,189,255,.11), transparent 28%),
    linear-gradient(180deg, rgba(11,14,18,.97), rgba(7,9,11,.98));
}
.architecture-canvas::before { content: ""; position: absolute; inset: 0; opacity: .16; background-image: radial-gradient(circle, rgba(255,255,255,.3) 1px, transparent 1px); background-size: 34px 34px; mask-image: linear-gradient(to bottom, black, transparent 84%); }
.governance-perimeter { position: absolute; inset: 34px; border: 1px solid rgba(216,173,89,.22); border-radius: 24px; pointer-events: none; }
.governance-perimeter span { position: absolute; top: -8px; left: 48px; padding: 0 12px; background: var(--panel); color: var(--gold); font-size: 8px; letter-spacing: .13em; text-transform: uppercase; }
.system-spine { position: absolute; top: 120px; bottom: 120px; left: 50%; width: 1px; background: linear-gradient(to bottom, rgba(216,173,89,.35), rgba(126,189,255,.45), rgba(255,255,255,.1)); }
.architecture-node {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--line);
  background: rgba(9,12,15,.88);
  text-align: left;
  cursor: pointer;
  transition: border-color .25s ease, transform .25s ease, background .25s ease;
}
.architecture-node:hover, .architecture-node:focus-visible, .architecture-node.is-active { border-color: rgba(126,189,255,.55); background: rgba(14,20,27,.96); transform: translateY(-2px); outline: none; }
.architecture-node.is-active { box-shadow: 0 0 34px rgba(126,189,255,.08); }
.node-index { display: grid; width: 38px; height: 38px; flex: 0 0 38px; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--gold); font-size: 9px; }
.architecture-node small { display: block; color: var(--muted); font-size: 8px; letter-spacing: .1em; text-transform: uppercase; }
.architecture-node strong { display: block; margin-top: 3px; font-family: var(--serif); font-size: 21px; font-weight: 400; }
.architecture-node b, .architecture-node em { margin-left: auto; color: var(--muted); font-size: 8px; font-style: normal; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; }
.authority-node { width: 330px; min-height: 82px; margin: 0 auto 72px; padding: 16px 18px; border-color: rgba(216,173,89,.42); }
.authority-node:hover, .authority-node:focus-visible, .authority-node.is-active { border-color: var(--gold); }
.core-stage { position: relative; z-index: 3; display: grid; grid-template-columns: 1fr 1.15fr 1fr; gap: 14px; max-width: 820px; margin: 0 auto 72px; }
.stage-node { min-height: 116px; padding: 18px; }
.nats-core { min-height: 150px; border-color: rgba(126,189,255,.45); background: radial-gradient(circle at 50% 30%, rgba(126,189,255,.13), rgba(10,15,20,.95)); }
.nats-core strong { font-size: 35px; }
.wide-node { width: min(820px,100%); min-height: 94px; margin: 0 auto 22px; padding: 18px 22px; }
.skills-node { border-color: rgba(255,255,255,.14); }
.memory-foundation { width: min(820px,100%); min-height: 104px; margin: 50px auto 0; padding: 18px 22px; border-color: rgba(158,119,235,.34); background: rgba(16,12,24,.74); }
.memory-foundation .node-index { color: #b591f3; }

.node-inspector { display: flex; min-height: 850px; flex-direction: column; padding: 36px; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(180deg, rgba(15,18,22,.96), rgba(9,11,14,.98)); }
.inspector-label { margin: 0 0 auto; color: var(--gold); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.node-inspector h3 { margin: 90px 0 22px; font-family: var(--serif); font-size: 48px; font-weight: 400; line-height: 1.02; }
.node-inspector > p:not(.inspector-label) { margin: 0; color: #d0d2d5; font-size: 16px; line-height: 1.75; }
.node-inspector dl { display: grid; margin: 48px 0 0; border-top: 1px solid var(--line); }
.node-inspector dl div { display: grid; grid-template-columns: 1fr 1fr; padding: 15px 0; border-bottom: 1px solid var(--line-soft); }
.node-inspector dt { color: var(--muted); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.node-inspector dd { margin: 0; text-align: right; font-size: 11px; }
.node-inspector > small { margin-top: auto; padding-top: 30px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.thinking-flow { display: grid; grid-template-columns: repeat(7,1fr); margin: 24px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.thinking-flow li { min-height: 108px; display: flex; flex-direction: column; justify-content: space-between; padding: 17px; border-right: 1px solid var(--line); }
.thinking-flow li:last-child { border-right: 0; }
.thinking-flow span { color: var(--gold); font-size: 9px; }
.thinking-flow strong { font-family: var(--serif); font-size: 17px; font-weight: 400; }

.chat-intro { display: grid; grid-template-columns: minmax(0,.28fr) minmax(0,1fr) minmax(300px,.43fr); align-items: end; gap: clamp(30px,6vw,90px); margin-bottom: 70px; }
.chat-intro .eyebrow { margin: 0; }
.chat-experience { display: grid; grid-template-columns: minmax(0,1fr) 370px; gap: 28px; }
.chat-card { overflow: hidden; border: 1px solid var(--line); border-radius: 30px; background: rgba(9,12,15,.92); }
.chat-head { min-height: 82px; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 20px; padding: 0 24px; border-bottom: 1px solid var(--line); }
.chat-identity { display: flex; align-items: center; gap: 12px; }
.chat-identity > span, .message-avatar { display: grid; width: 38px; height: 38px; flex: 0 0 38px; place-items: center; border: 1px solid rgba(216,173,89,.5); border-radius: 50%; color: var(--gold); font-family: var(--serif); }
.chat-identity div { display: grid; }
.chat-identity strong { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.chat-identity small { margin-top: 3px; color: var(--muted); font-size: 9px; }
.chat-state { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 9px; }
.chat-state i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px rgba(128,216,137,.6); }
#new-chat { padding: 10px 14px; border: 1px solid var(--line); background: transparent; color: #d6d7d9; font-size: 9px; letter-spacing: .07em; text-transform: uppercase; cursor: pointer; }
.chat-log { height: 570px; overflow-y: auto; padding: 32px 30px; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.18) transparent; }
.message { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 26px; }
.message > div { max-width: 72%; padding: 17px 19px; border: 1px solid var(--line); background: rgba(255,255,255,.025); }
.message p { margin: 0 0 10px; color: #d8d9db; font-size: 14px; line-height: 1.7; white-space: pre-wrap; }
.message p:last-child { margin-bottom: 0; }
.message-user { justify-content: flex-end; }
.message-user .message-avatar { display: none; }
.message-user > div { border-color: rgba(216,173,89,.4); background: rgba(216,173,89,.055); }
.message.is-loading > div { color: var(--muted); animation: fadePulse 1.3s ease-in-out infinite; }
.message-sources { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.message-sources a { padding: 7px 9px; border: 1px solid var(--line); color: var(--blue); font-size: 9px; }
.prompt-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 30px 18px; }
.prompt-chips button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: #c9cbd0; font-size: 9px; cursor: pointer; }
.prompt-chips button:hover { border-color: rgba(216,173,89,.45); color: var(--text); }
.chat-form { display: grid; grid-template-columns: 1fr auto; align-items: end; margin: 0 30px 22px; border: 1px solid rgba(216,173,89,.42); }
.chat-form textarea { min-height: 58px; max-height: 150px; resize: none; padding: 18px; border: 0; outline: 0; background: transparent; color: var(--text); line-height: 1.5; }
.chat-form textarea::placeholder { color: #777b82; }
.chat-form button { min-width: 112px; min-height: 58px; display: inline-flex; align-items: center; justify-content: center; gap: 14px; border: 0; border-left: 1px solid rgba(216,173,89,.42); background: transparent; cursor: pointer; }
.chat-form button b { color: var(--gold); }
.chat-form button:disabled { opacity: .5; cursor: wait; }
.chat-foot { display: flex; justify-content: space-between; gap: 20px; padding: 0 30px 24px; color: #777b82; font-size: 9px; }
.public-contract { padding: 34px; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(180deg, rgba(15,18,22,.96), rgba(9,11,14,.98)); }
.side-label { margin: 0 0 70px; color: var(--gold); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.public-contract h3 { margin: 0 0 34px; font-family: var(--serif); font-size: 42px; font-weight: 400; line-height: 1.05; }
.public-contract ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.public-contract li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 18px 0; border-bottom: 1px solid var(--line-soft); }
.public-contract li > span { color: var(--gold); font-size: 9px; }
.public-contract strong { font-family: var(--serif); font-size: 17px; font-weight: 400; }
.public-contract li p { margin: 6px 0 0; color: var(--muted); font-size: 11px; line-height: 1.65; }
.public-contract > a { display: flex; justify-content: space-between; margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line); color: #d2d4d7; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.public-contract > a span { color: var(--gold); }

.principles-section { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding: 120px 0 40px; }
.principle { min-height: 680px; display: flex; flex-direction: column; padding: 48px; border: 1px solid var(--line); border-radius: 30px; }
.memory-principle { background: linear-gradient(145deg, rgba(19,14,28,.82), rgba(9,11,14,.98)); }
.governance-principle { background: linear-gradient(145deg, rgba(25,20,12,.68), rgba(9,11,14,.98)); }
.principle h2 { margin-bottom: 34px; }
.principle > p:not(.eyebrow) { max-width: 620px; }
.principle-ledger, .authority-tiers { margin: auto 0 0; padding: 0; border-top: 1px solid var(--line); }
.principle-ledger div, .authority-tiers li { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line-soft); }
.principle-ledger span, .authority-tiers span { color: var(--gold); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; }
.principle-ledger strong { font-family: var(--serif); font-size: 18px; font-weight: 400; }
.authority-tiers { list-style: none; }
.authority-tiers p { margin: 0; color: #d3d5d7; font-family: var(--serif); font-size: 19px; }

.deployment-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 18px; }
.deployment-flow article { min-height: 310px; display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line); background: rgba(255,255,255,.018); }
.deployment-flow article > span { color: var(--gold); font-size: 9px; }
.deployment-flow small { margin-top: auto; color: var(--muted); font-size: 8px; letter-spacing: .09em; text-transform: uppercase; }
.deployment-flow h3 { margin: 8px 0 10px; font-family: var(--serif); font-size: 34px; font-weight: 400; }
.deployment-flow p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.deployment-flow > i { align-self: center; color: var(--gold); font-style: normal; }
.resilience-line { display: grid; grid-template-columns: repeat(6,1fr); margin-top: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.resilience-line span { padding: 17px 12px; border-right: 1px solid var(--line); color: var(--muted); font-size: 8px; letter-spacing: .09em; text-align: center; text-transform: uppercase; }
.resilience-line span:last-child { border-right: 0; }

.site-footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; padding: 110px 0 44px; }
.site-footer > div { display: flex; align-items: center; gap: 16px; }
.site-footer p { margin: 0; font-family: var(--serif); font-size: 26px; line-height: 1.25; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 24px; color: var(--muted); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }

@keyframes orbitSpin { to { transform: rotate(360deg); } }
@keyframes orbitPulse { 0%,100% { opacity: .7; transform: scale(1); } 50% { opacity: 1; transform: scale(1.025); } }
@keyframes fadePulse { 50% { opacity: .45; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1180px) {
  :root { --shell: min(100% - 42px, 1080px); }
  .desktop-nav { gap: 18px; }
  .hero { grid-template-columns: 1fr 430px; gap: 40px; }
  .orbit-outer { width: 430px; height: 430px; }
  .orbit-inner { width: 300px; height: 300px; }
  .architecture-layout, .chat-experience { grid-template-columns: minmax(0,1fr) 320px; }
  .architecture-canvas { padding: 42px; }
  .node-inspector { padding: 28px; }
  .node-inspector h3 { font-size: 40px; }
}

@media (max-width: 900px) {
  :root { --shell: min(100% - 32px, 760px); }
  .desktop-nav, .gateway-state { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .menu-button { display: inline-flex; align-items: center; gap: 12px; padding: 12px 0; color: #d5d6d8; }
  .menu-button i { width: 22px; height: 1px; background: currentColor; box-shadow: 0 6px currentColor; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding: 85px 0 50px; }
  .hero-copy { max-width: 700px; }
  .hero-system { min-height: 600px; }
  .hero-boundary { grid-template-columns: 1fr 1fr; }
  .hero-boundary span:nth-child(2) { border-right: 0; }
  .hero-boundary span:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-heading, .chat-intro { grid-template-columns: 1fr; align-items: start; gap: 24px; }
  .architecture-layout, .chat-experience { grid-template-columns: 1fr; }
  .node-inspector { min-height: auto; }
  .node-inspector h3 { margin-top: 50px; }
  .thinking-flow { grid-template-columns: repeat(4,1fr); }
  .thinking-flow li:nth-child(4) { border-right: 0; }
  .thinking-flow li:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .principles-section { grid-template-columns: 1fr; }
  .deployment-flow { grid-template-columns: 1fr; }
  .deployment-flow > i { transform: rotate(90deg); }
  .resilience-line { grid-template-columns: repeat(3,1fr); }
  .resilience-line span:nth-child(3n) { border-right: 0; }
  .resilience-line span:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 620px) {
  :root { --shell: calc(100% - 28px); --header-h: 68px; }
  .site-header { padding-inline: 16px; }
  .brand-symbol { width: 34px; height: 34px; font-size: 20px; }
  .hero { padding-top: 70px; }
  .hero h1 { font-size: clamp(54px,17vw,78px); }
  .hero-lead { font-size: 18px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .text-link { padding: 14px 0; }
  .hero-system { min-height: 510px; transform: scale(.92); margin-inline: -12px; }
  .orbit-outer { width: 380px; height: 380px; }
  .orbit-inner { width: 265px; height: 265px; }
  .hero-core { width: 160px; height: 160px; }
  .hero-core strong { font-size: 45px; }
  .hero-authority, .hero-memory { min-width: 205px; padding: 13px 15px; }
  .hero-system > p { width: 90%; font-size: 11px; }
  .hero-boundary { margin-top: 0; }
  .hero-boundary span { padding: 14px 8px; font-size: 7px; }
  .architecture-section, .chat-section, .system-section { padding: 105px 0 35px; }
  .section-heading h2, .chat-intro h2, .principle h2 { font-size: clamp(48px,15vw,68px); }
  .architecture-canvas { min-height: auto; padding: 34px 18px; border-radius: 22px; }
  .governance-perimeter { inset: 14px; }
  .system-spine { top: 95px; bottom: 90px; }
  .authority-node { width: 100%; margin-bottom: 42px; }
  .core-stage { grid-template-columns: 1fr; margin-bottom: 42px; }
  .stage-node, .nats-core { min-height: 92px; }
  .nats-core strong { font-size: 28px; }
  .wide-node, .memory-foundation { min-height: 96px; padding: 15px; }
  .architecture-node strong { font-size: 17px; }
  .architecture-node b, .architecture-node em { display: none; }
  .node-inspector { padding: 26px 22px; border-radius: 22px; }
  .node-inspector h3 { margin: 42px 0 18px; font-size: 38px; }
  .thinking-flow { grid-template-columns: 1fr 1fr; }
  .thinking-flow li, .thinking-flow li:nth-child(4) { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .thinking-flow li:nth-child(even) { border-right: 0; }
  .thinking-flow li:last-child { grid-column: 1 / -1; border-right: 0; border-bottom: 0; }
  .chat-head { grid-template-columns: 1fr auto; padding: 16px; }
  .chat-state { grid-column: 1 / -1; grid-row: 2; }
  #new-chat { grid-column: 2; grid-row: 1; }
  .chat-log { height: 520px; padding: 22px 16px; }
  .message > div { max-width: 84%; }
  .prompt-chips { padding: 0 16px 14px; }
  .chat-form { margin: 0 16px 16px; grid-template-columns: 1fr 62px; }
  .chat-form button { min-width: 62px; }
  .chat-form button span { display: none; }
  .chat-foot { flex-direction: column; padding: 0 16px 20px; }
  .public-contract { padding: 28px 22px; border-radius: 22px; }
  .side-label { margin-bottom: 45px; }
  .public-contract h3 { font-size: 36px; }
  .principle { min-height: 600px; padding: 32px 22px; border-radius: 22px; }
  .principle-ledger div, .authority-tiers li { grid-template-columns: 105px 1fr; }
  .deployment-flow article { min-height: 250px; }
  .resilience-line { grid-template-columns: 1fr 1fr; }
  .resilience-line span, .resilience-line span:nth-child(3n) { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .resilience-line span:nth-child(even) { border-right: 0; }
  .resilience-line span:nth-last-child(-n+2) { border-bottom: 0; }
  .site-footer { align-items: flex-start; flex-direction: column; padding-top: 80px; }
  .site-footer p { font-size: 21px; }
}