:root {
  --bg: #f6f8f3;
  --paper: #ffffff;
  --surface: #eef1e9;
  --surface-strong: #e5eae0;
  --ink: #101612;
  --text: #101612;
  --muted: #5c675f;
  --faint: #879087;
  --brand: #d8ff74;
  --brand-strong: #bfe845;
  --brand-ink: #263600;
  --mark-surface: #111713;
  --mark-shadow: 0 .375rem 1rem rgba(16,22,18,.14);
  --success: #168a54;
  --info: #2367d8;
  --danger: #ba3e55;
  --line: rgba(16,22,18,.12);
  --line-strong: rgba(16,22,18,.22);
  --grid: rgba(16,22,18,.055);
  --shell: min(1320px, calc(100vw - 64px));
  --shadow-sm: 0 10px 30px rgba(24,35,27,.06);
  --shadow-lg: 0 34px 100px rgba(25,38,28,.12);
  --display: "Segoe UI Variable Display", "Aptos Display", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  --sans: "Segoe UI Variable Text", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --copy: 1rem;
  --control-text: .9375rem;
  --ui-caption: .75rem;
  --ui-detail: .875rem;
  --ui-body: .9375rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ui-icon { width: 1em; height: 1em; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.link-icon { width: 1.05em; height: 1.05em; }
code, pre, .kicker, .eyebrow, .node-index, .path-index, .step-index { font-family: var(--mono); }
::selection { background: var(--brand); color: var(--brand-ink); }
.shell { width: var(--shell); margin-inline: auto; }
.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 {
  position: fixed;
  z-index: 500;
  top: 12px;
  left: 14px;
  padding: 10px 14px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--brand);
  color: var(--ink);
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  border-bottom: 1px solid transparent;
  background: rgba(246,248,243,.8);
  backdrop-filter: blur(18px) saturate(140%);
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(250,251,248,.94); box-shadow: 0 4px 18px rgba(25,38,28,.04); }
.nav-shell { min-height: 72px; display: flex; align-items: center; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand img { width: 2.125rem; height: 2.125rem; padding: .3125rem; border-radius: .5625rem; background: var(--mark-surface); object-fit: contain; box-shadow: var(--mark-shadow); }
.brand-wordmark { font: 700 15px/1.2 var(--display); letter-spacing: -.01em; }
.brand-wordmark i { margin-left: 4px; color: var(--faint); font: 500 11px/1 var(--mono); font-style: normal; letter-spacing: .08em; }
.nav-links { display: flex; align-items: center; gap: 25px; margin-left: auto; color: #59635c; font-size: .9375rem; font-weight: 600; }
.nav-links a, .nav-source-link { transition: color 160ms ease; }
.nav-source-link { display: inline-flex; align-items: center; gap: .35em; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-source-link:hover, .nav-source-link:focus-visible { color: var(--ink); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-source-link { color: var(--muted); font-size: .9375rem; font-weight: 600; }
.menu-button { display: none; width: 42px; height: 42px; padding: 0; cursor: pointer; border: 1px solid var(--line-strong); border-radius: 9px; background: rgba(255,255,255,.76); }
.menu-button span { display: block; width: 16px; height: 1px; margin: 5px auto; background: var(--ink); transition: transform 160ms ease; }
.menu-button[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
.menu-button[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  font-size: .9375rem;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}
.button:hover { transform: translateY(-1px); }
.button:focus-visible, .copy-button:focus-visible, .menu-button:focus-visible, .demo-tab:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid rgba(81,112,0,.25); outline-offset: 3px; }
.button-small { min-height: 40px; padding-inline: 15px; }
.button-large { min-height: 52px; padding-inline: 22px; }
.button-primary { border-color: var(--brand-strong); background: var(--brand); color: var(--brand-ink); box-shadow: 0 12px 28px rgba(92,121,24,.16); }
.button-primary:hover { border-color: #aacd36; background: var(--brand-strong); color: #172300; box-shadow: 0 14px 32px rgba(92,121,24,.22); }
.button-secondary { border-color: var(--line-strong); background: rgba(255,255,255,.7); }
.button-secondary:hover { border-color: rgba(16,22,18,.35); background: #fff; }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: #334808; font-size: .9375rem; font-weight: 750; }
.text-link:hover { color: #1d2c00; }
.status-pulse { display: inline-block; width: 7px; height: 7px; flex: 0 0 auto; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px rgba(22,138,84,.09); }
.kicker { display: inline-block; color: #4e6909; font-size: .75rem; font-weight: 750; letter-spacing: .12em; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 154px 0 0;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 560px at 86% 16%, rgba(216,255,116,.34), transparent 64%),
    var(--bg);
}
.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black 0%, rgba(0,0,0,.75) 70%, transparent 100%);
}
.hero-layout { position: relative; z-index: 2; display: grid; grid-template-columns: .84fr 1.16fr; gap: 4.625rem; align-items: center; padding-bottom: 4.875rem; }
.hero-copy { max-width: 40rem; }
.eyebrow { display: inline-flex; align-items: center; gap: .5625rem; color: #59635b; font-size: .75rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.hero h1 { max-width: 47.5rem; margin: 1.6875rem 0 0; color: #172019; font-family: var(--display); font-size: clamp(3.625rem, 5.3vw, 5.25rem); font-weight: 700; line-height: .91; letter-spacing: -.058em; }
.hero-line { display: block; width: max-content; max-width: 100%; }
.hero-line + .hero-line { margin-top: .055em; }
.hero-line-primary { color: #131a15; font-weight: 760; }
.hero-chatgpt { color: #456500; text-shadow: .04em .04em 0 rgba(216,255,116,.78); }
.hero-line-secondary { color: #2d3930; font-size: .94em; font-weight: 630; letter-spacing: -.06em; }
.hero-line-accent { color: #456500; font-size: 1.04em; font-weight: 790; letter-spacing: -.064em; }

.hero-lede { max-width: 40.625rem; margin: 1.8125rem 0 0; color: var(--muted); font-size: 1.1875rem; line-height: 1.62; letter-spacing: -.01em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .625rem; margin-top: 1.9375rem; }




.agent-stage { position: relative; min-width: 0; padding: 20px 0 0 26px; }
.agent-stage::before { content: ""; position: absolute; inset: 4% -8% -5% 5%; z-index: -1; border-radius: 50%; background: radial-gradient(circle, rgba(216,255,116,.5), transparent 66%); filter: blur(24px); opacity: .62; }
.chat-card, .session-window { border: 1px solid var(--line-strong); background: rgba(255,255,255,.94); box-shadow: var(--shadow-lg); }
.chat-card { position: relative; z-index: 2; width: 72%; margin-left: auto; border-radius: 16px 16px 6px 16px; overflow: hidden; }
.card-chrome, .session-titlebar { display: flex; min-height: 48px; align-items: center; padding: 0 15px; border-bottom: 1px solid var(--line); background: #fbfcfa; }
.app-identity { display: inline-flex; align-items: center; gap: 8px; min-width: 0; }
.app-identity img { width: 24px; height: 24px; object-fit: contain; }
.session-titlebar .app-identity img, .desktop-titlebar .app-identity img { width: 1.875rem; height: 1.875rem; padding: .3125rem; border-radius: .5rem; background: var(--mark-surface); box-shadow: var(--mark-shadow); }
.app-identity strong { font-family: var(--display); font-size: .875rem; font-weight: 720; }
.chrome-note { margin-left: auto; color: #69736b; font: 650 var(--ui-caption)/1.1 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.chat-message { padding: 17px 18px; }
.chat-message + .chat-message { border-top: 1px solid var(--line); }
.chat-message span { color: #68736a; font: 750 var(--ui-caption)/1.1 var(--mono); letter-spacing: .08em; }
.chat-message p { margin: 8px 0 0; color: #313a33; font-size: var(--ui-body); line-height: 1.55; }
.chat-message-user { background: #f2f5ee; }
.chat-message-assistant { background: #fff; }

.tunnel-link { position: relative; z-index: 1; display: flex; height: 66px; align-items: center; justify-content: flex-end; padding-right: 28%; color: #5f6961; font: 700 var(--ui-caption)/1.1 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.tunnel-link i { position: absolute; right: 28%; top: 0; bottom: 0; width: 1px; background: linear-gradient(var(--line-strong), #719025, var(--line-strong)); }
.tunnel-link i::after { content: ""; position: absolute; left: -3px; bottom: 0; width: 7px; height: 7px; border-right: 1px solid #5c7b13; border-bottom: 1px solid #5c7b13; transform: rotate(45deg); }

.session-window { position: relative; z-index: 2; overflow: hidden; border-radius: 14px; }
.session-titlebar { display: grid; grid-template-columns: 1fr auto 1fr; }
.workspace-chip { color: #5d6860; font: 600 var(--ui-caption)/1.1 var(--mono); }
.workspace-chip b { color: #263128; font-weight: 750; }
.connection-status { display: inline-flex; justify-self: end; align-items: center; gap: 7px; color: #26704d; font: 750 var(--ui-caption)/1.1 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.connection-status i, .session-boundaries i, .node-status i, .desktop-connection i, .desktop-footer-state i { width: 6px; height: 6px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 3px rgba(22,138,84,.08); }
.session-context { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 15px 18px; border-bottom: 1px solid var(--line); background: #fff; }
.session-context span { display: block; color: #667168; font: 750 var(--ui-caption)/1.1 var(--mono); letter-spacing: .07em; }
.session-context strong { display: block; margin-top: 7px; font-size: var(--ui-body); font-weight: 750; }
.session-context code { color: #536056; font-size: var(--ui-caption); }
.demo-tabs { display: flex; min-height: 43px; align-items: end; gap: 3px; padding: 0 13px; border-bottom: 1px solid var(--line); background: #f7f9f5; }
.demo-tab { position: relative; min-height: 44px; padding: 0 12px; cursor: pointer; border: 0; background: transparent; color: #69736b; font: 750 var(--ui-caption)/1 var(--mono); }
.demo-tab::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: -1px; height: 2px; background: transparent; }
.demo-tab.is-active { color: var(--ink); }
.demo-tab.is-active::after { background: #668b12; }
.demo-panel { min-height: 292px; padding: 16px 18px 18px; background: #fff; }
.tool-timeline { border-top: 1px solid var(--line); }
.tool-event { display: grid; grid-template-columns: 34px minmax(0,1fr) auto; gap: 11px; align-items: center; min-height: 57px; border-bottom: 1px solid var(--line); color: #737d75; }
.tool-event > span { color: #778179; font: 650 var(--ui-caption)/1 var(--mono); }
.tool-event strong, .tool-event small { display: block; }
.tool-event strong { color: #465149; font: 750 var(--ui-detail)/1.3 var(--mono); }
.tool-event small { margin-top: 5px; color: #68736a; font: 550 var(--ui-caption)/1.35 var(--mono); }
.tool-event b { color: #68736a; font: 700 var(--ui-caption)/1 var(--mono); font-weight: 700; }
.tool-event.is-done strong { color: #303a32; }
.tool-event.is-done b { color: var(--success); }
.tool-event.is-current { margin-inline: -18px; padding-inline: 18px; background: linear-gradient(90deg, rgba(216,255,116,.36), rgba(216,255,116,.08)); }
.tool-event.is-current strong, .tool-event.is-current b { color: #314500; }
.file-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 8px 0 14px; color: #667168; font: 650 var(--ui-caption)/1.1 var(--mono); }
.file-header span:first-child { color: #263128; }
.code-diff { margin: 0; overflow: auto; border: 1px solid var(--line); border-radius: 8px; background: #f7f9f5; font: var(--ui-caption)/1.6 var(--mono); }
.code-diff code { display: block; min-width: 470px; padding: 13px 0; }
.code-diff .line { display: block; padding: 0 14px; white-space: pre; }
.code-diff .context { color: #6b756c; }
.code-diff .removed { background: rgba(186,62,85,.07); color: #9c3448; }
.code-diff .added { background: rgba(22,138,84,.07); color: #0f6c40; }
.diff-footer, .validation-footer { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 15px; color: #626d64; font: 650 var(--ui-caption)/1.3 var(--mono); }
.diff-footer strong, .validation-footer strong { color: #263128; font-weight: 750; }
.validation-summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 15px; border: 1px solid rgba(22,138,84,.18); border-radius: 8px; background: rgba(22,138,84,.045); }
.validation-summary span { color: #247650; font: 750 var(--ui-caption)/1 var(--mono); letter-spacing: .07em; }
.validation-summary strong { font-size: var(--ui-body); }
.check-list { margin-top: 10px; border-top: 1px solid var(--line); }
.check-list > div { display: grid; grid-template-columns: 24px 1fr auto; gap: 10px; align-items: center; min-height: 56px; border-bottom: 1px solid var(--line); }
.check-list i { color: var(--success); font: normal var(--ui-detail)/1 var(--mono); }
.check-list p { margin: 0; }
.check-list strong, .check-list small { display: block; }
.check-list strong { font-size: var(--ui-detail); }
.check-list small { margin-top: 4px; color: #68736a; font: 550 var(--ui-caption)/1.3 var(--mono); }
.check-list b { color: var(--success); font: 750 var(--ui-caption)/1 var(--mono); font-weight: 750; }
.session-boundaries { display: flex; flex-wrap: wrap; gap: 8px 16px; padding: 14px 18px; border-top: 1px solid var(--line); background: #f5f7f2; color: #59655c; font: 700 var(--ui-caption)/1.15 var(--mono); text-transform: uppercase; letter-spacing: .035em; }
.session-boundaries span { display: inline-flex; align-items: center; gap: 6px; }

.hero-principles { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); }
.hero-principles > div { display: grid; grid-template-columns: 34px 1fr; gap: 16px; min-height: 150px; padding: 28px 28px 30px 0; border-right: 1px solid var(--line); }
.hero-principles > div + div { padding-left: 28px; }
.hero-principles > div:last-child { border-right: 0; }
.hero-principles span { color: #5e7d15; font: 750 10px/1.2 var(--mono); }
.hero-principles p { margin: 0; color: var(--muted); font-size: var(--control-text); line-height: 1.55; }
.hero-principles strong { display: block; margin-bottom: 5px; color: var(--ink); font-size: 1rem; }

.section { position: relative; padding: 118px 0; border-bottom: 1px solid var(--line); }
.section-heading { max-width: 1040px; }
.section-heading h2, .why-copy h2, .capabilities-copy h2, .desktop-copy h2, .local-copy h2, .setup-header h2, .oss-copy h2, .faq-heading h2 { margin: 18px 0 0; font-family: var(--display); font-size: clamp(2.125rem, 3vw, 3.25rem); font-weight: 710; line-height: 1.04; letter-spacing: -.04em; text-wrap: balance; }
.section-heading > p, .split-heading > p { color: var(--muted); font-size: var(--copy); line-height: 1.62; }
.split-heading { display: grid; grid-template-columns: 1.02fr .72fr; gap: 100px; align-items: end; max-width: none; }
.split-heading > p { margin: 0 0 5px; }

.workflow-section { background: #fff; }
.workflow-path { display: grid; grid-template-columns: repeat(5,1fr); margin: 66px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.workflow-path li { position: relative; min-height: 365px; padding: 22px 20px 28px; border-right: 1px solid var(--line); }
.workflow-path li:last-child { border-right: 0; }
.workflow-path li:not(:last-child)::after { content: ""; position: absolute; top: 96px; right: -5px; z-index: 2; width: 8px; height: 8px; border-top: 1px solid #61705f; border-right: 1px solid #61705f; background: #fff; transform: rotate(45deg); }
.path-index { color: #73806f; font-size: 10px; font-weight: 700; }
.path-icon { display: grid; width: 3.25rem; height: 3.25rem; place-items: center; margin-top: 49px; border: 1px solid rgba(255,255,255,.1); border-radius: .7rem; background: var(--mark-surface); color: var(--brand); font-size: 1rem; box-shadow: var(--mark-shadow); }
.path-icon .ui-icon { width: 1.45em; height: 1.45em; }
.workflow-path strong { display: block; margin-top: 26px; font-family: var(--display); font-size: 1.25rem; font-weight: 720; letter-spacing: -.02em; }
.workflow-path p { margin: 10px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.58; }
.workflow-path code { position: absolute; left: 20px; right: 20px; bottom: 27px; color: #7c877e; font-size: .75rem; line-height: 1.4; white-space: normal; }
.workflow-path li:nth-child(4) { background: linear-gradient(180deg, rgba(216,255,116,.18), transparent 64%); }

.why-section { background: #f2f4ee; }
.why-layout { display: grid; grid-template-columns: .68fr 1.32fr; gap: 92px; align-items: start; }
.why-copy { position: sticky; top: 116px; }
.why-copy > p, .capabilities-copy > p, .desktop-copy > p, .local-copy > p { max-width: 600px; margin: 22px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.62; }
.why-copy .text-link, .capabilities-copy .text-link, .desktop-copy .text-link, .local-copy .text-link { margin-top: 26px; }
.comparison-board { display: grid; grid-template-columns: 1fr 1fr; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 14px; background: #fff; box-shadow: var(--shadow-sm); }
.comparison-column { min-width: 0; }
.comparison-column + .comparison-column { border-left: 1px solid var(--line-strong); }
.comparison-label { display: flex; min-height: 54px; align-items: center; justify-content: space-between; gap: 12px; padding: 0 18px; border-bottom: 1px solid var(--line); background: #f8f9f6; }
.comparison-label span { color: #747e75; font: 750 9px/1 var(--mono); letter-spacing: .1em; }
.comparison-label b { color: #8a938b; font: 600 9px/1 var(--mono); font-weight: 600; }
.comparison-after .comparison-label { background: rgba(216,255,116,.24); }
.comparison-after .comparison-label span { color: #415b05; }
.comparison-flow { padding: 8px 18px 16px; }
.comparison-flow > div { display: grid; grid-template-columns: 30px 1fr; gap: 11px; min-height: 78px; align-items: center; border-bottom: 1px solid var(--line); }
.comparison-flow > div:last-child { border-bottom: 0; }
.comparison-flow span { color: #8a948a; font: 650 9px/1 var(--mono); }
.comparison-flow p { margin: 0; color: #5e685f; font-size: var(--copy); line-height: 1.55; }
.comparison-after .comparison-flow span { color: #5c7918; }
.comparison-after .comparison-flow p { color: #303b32; }

.capabilities-section { background: #fff; }
.capabilities-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 98px; align-items: start; }
.capabilities-copy { position: sticky; top: 116px; }
.tool-surface { border-top: 1px solid var(--line-strong); }
.tool-group { display: grid; grid-template-columns: 220px 1fr; gap: 28px; padding: 28px 0 31px; border-bottom: 1px solid var(--line-strong); }
.tool-group-heading span { color: #52700a; font: 750 10px/1 var(--mono); letter-spacing: .1em; }
.tool-group-heading p { margin: 10px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.55; }
.tool-chips { display: flex; flex-wrap: wrap; align-content: start; gap: 8px; }
.tool-chips code { display: inline-flex; min-height: 39px; align-items: center; padding: 0 11px; border: 1px solid var(--line); border-radius: 7px; background: #f6f8f3; color: #2e3930; font-size: 11px; }
.tool-chips code:hover { border-color: rgba(81,112,0,.3); background: rgba(216,255,116,.18); }

.architecture-section { overflow: hidden; background: #eef1e9; }
.architecture-section::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to bottom, transparent, black 24%, black 80%, transparent); }
.architecture-section > .shell { position: relative; z-index: 1; }
.architecture-board { display: grid; grid-template-columns: 1fr 150px 1.12fr 150px 1fr; align-items: center; margin-top: 68px; }
.arch-node { position: relative; min-height: 300px; padding: 25px; border: 1px solid var(--line-strong); border-radius: 12px; background: rgba(255,255,255,.94); box-shadow: var(--shadow-sm); }
.node-index { position: absolute; top: 18px; right: 18px; color: #6d776f; font-size: var(--ui-caption); font-weight: 750; letter-spacing: .05em; }
.arch-node img, .repo-node-icon { width: 52px; height: 52px; margin-top: 50px; }
.arch-node img { object-fit: contain; }
.arch-relai > img { width: 4rem; height: 4rem; padding: .625rem; border-radius: .875rem; background: var(--mark-surface); box-shadow: var(--mark-shadow); }
.arch-node .chatgpt-mark { padding: 7px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.repo-node-icon { display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 10px; background: #f1f4ed; color: #3765ad; font-size: 20px; }
.repo-node-icon .ui-icon { width: 1.35em; height: 1.35em; }
.arch-node strong { display: block; margin-top: 29px; font-family: var(--display); font-size: 1.25rem; font-weight: 720; letter-spacing: -.02em; }
.arch-node p { margin: 9px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.58; }
.arch-relai { border-color: rgba(81,112,0,.28); background: linear-gradient(145deg, rgba(216,255,116,.35), #fff 58%); box-shadow: 0 20px 60px rgba(77,103,19,.08); }
.node-status { display: inline-flex; align-items: center; gap: 7px; margin-top: 21px; padding: 8px 10px; border: 1px solid rgba(22,138,84,.15); border-radius: 6px; background: rgba(22,138,84,.045); color: #216b49; font: 700 var(--ui-caption)/1.1 var(--mono); text-transform: uppercase; letter-spacing: .04em; }
.arch-connector { position: relative; display: grid; height: 1px; place-items: center; background: linear-gradient(90deg, rgba(16,22,18,.18), rgba(81,112,0,.45), rgba(16,22,18,.18)); }
.arch-connector i { position: absolute; right: 0; width: 7px; height: 7px; border-top: 1px solid #557514; border-right: 1px solid #557514; transform: rotate(45deg); }
.arch-connector span { position: absolute; top: -30px; color: #68736a; font: 700 var(--ui-caption)/1.1 var(--mono); letter-spacing: .06em; }
.arch-connector b { position: absolute; top: 15px; color: #59655c; font: 650 var(--ui-caption)/1.1 var(--mono); font-weight: 650; white-space: nowrap; }
.contract-grid { display: grid; grid-template-columns: repeat(2,1fr); margin-top: 44px; border: 1px solid var(--line-strong); border-radius: 12px; overflow: hidden; background: rgba(255,255,255,.76); }
.contract-grid article { display: grid; grid-template-columns: 40px 1fr; gap: 16px; min-height: 142px; padding: 25px; }
.contract-grid article:nth-child(odd) { border-right: 1px solid var(--line); }
.contract-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
.contract-grid span { color: #557515; font: 750 10px/1 var(--mono); }
.contract-grid strong { display: block; font-family: var(--display); font-size: 1.0625rem; font-weight: 720; letter-spacing: -.01em; }
.contract-grid p { margin: 7px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.55; }
.openai-attribution { max-width: 830px; margin: 17px 0 0; color: #7c867d; font-size: 11px; line-height: 1.45; }

.desktop-section { background: #fff; }
.desktop-layout { display: grid; grid-template-columns: .62fr 1.38fr; gap: 82px; align-items: center; }
.desktop-window { overflow: hidden; border: 1px solid var(--line-strong); border-radius: 16px; background: #f8faf6; box-shadow: var(--shadow-lg); }
.desktop-titlebar { display: grid; grid-template-columns: 1fr auto 1fr; min-height: 52px; align-items: center; padding: 0 16px; border-bottom: 1px solid var(--line); background: #fbfcfa; }
.desktop-title { color: #5e6961; font: 650 var(--ui-caption)/1.1 var(--mono); }
.desktop-connection { display: inline-flex; justify-self: end; align-items: center; gap: 7px; color: #236c49; font: 750 var(--ui-caption)/1.1 var(--mono); text-transform: uppercase; letter-spacing: .05em; }
.desktop-body { display: grid; grid-template-columns: 180px 1fr; min-height: 520px; }
.desktop-sidebar { padding: 18px 11px; border-right: 1px solid var(--line); background: #f2f5ef; }
.sidebar-label { display: block; padding: 11px 10px 8px; color: #727d74; font: 750 var(--ui-caption)/1 var(--mono); letter-spacing: .07em; }
.desktop-sidebar b { display: flex; min-height: 40px; align-items: center; justify-content: space-between; padding: 0 10px; border-radius: 7px; color: #566158; font-size: var(--ui-detail); font-weight: 680; }
.desktop-sidebar b.is-active { background: #fff; color: #263128; box-shadow: 0 2px 8px rgba(16,22,18,.04); }
.desktop-sidebar b i { display: grid; width: 19px; height: 19px; place-items: center; border-radius: 50%; background: var(--brand); color: #334600; font: normal 8px/1 var(--mono); }
.desktop-content { min-width: 0; padding: 22px; background: #fff; }
.desktop-content-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 19px; border-bottom: 1px solid var(--line); }
.desktop-content-head span { display: block; color: #68736a; font: 750 var(--ui-caption)/1.1 var(--mono); letter-spacing: .07em; }
.desktop-content-head strong { display: block; margin-top: 8px; font-family: var(--display); font-size: 20px; font-weight: 720; }
.desktop-content-head code { padding: 7px 9px; border: 1px solid var(--line); border-radius: 6px; background: #f4f6f2; color: #4f5b52; font-size: var(--ui-caption); }
.session-metrics { display: grid; grid-template-columns: repeat(3,1fr); margin-top: 16px; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.session-metrics article { min-height: 98px; padding: 15px; border-right: 1px solid var(--line); background: #fafbf9; }
.session-metrics article:last-child { border-right: 0; }
.session-metrics span { color: #68736a; font: 750 var(--ui-caption)/1 var(--mono); letter-spacing: .06em; }
.session-metrics strong { display: block; margin-top: 12px; font-size: 15px; }
.session-metrics small { display: block; margin-top: 5px; color: #667168; font: 550 var(--ui-caption)/1.25 var(--mono); }
.desktop-activity { margin-top: 17px; border-top: 1px solid var(--line); }
.desktop-activity > div { display: grid; grid-template-columns: 26px minmax(0,1fr) auto; gap: 10px; align-items: center; min-height: 69px; border-bottom: 1px solid var(--line); }
.activity-mark { display: grid; width: 22px; height: 22px; place-items: center; border-radius: 6px; font-size: 9px; }
.activity-mark .ui-icon { width: 1.25em; height: 1.25em; }
.activity-mark.success { background: rgba(22,138,84,.08); color: var(--success); }
.activity-mark.current { background: rgba(216,255,116,.36); color: #4d6a08; }
.desktop-activity p { margin: 0; }
.desktop-activity strong, .desktop-activity small { display: block; }
.desktop-activity strong { font-size: var(--ui-detail); }
.desktop-activity small { margin-top: 5px; color: #667168; font: 550 var(--ui-caption)/1.3 var(--mono); }
.desktop-activity code { color: #5f6b62; font-size: var(--ui-caption); }
.desktop-footer-state { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 18px; padding: 12px 13px; border-radius: 8px; background: #f4f6f1; color: #526057; font: 650 var(--ui-caption)/1.3 var(--mono); }
.desktop-footer-state span { display: inline-flex; align-items: center; gap: 7px; }
.desktop-footer-state b { color: #4b554d; font-weight: 650; }

.local-section { background: #f2f4ee; }
.local-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 92px; align-items: center; }
.local-ledger { overflow: hidden; border: 1px solid var(--line-strong); border-radius: 13px; background: #fff; box-shadow: var(--shadow-sm); }
.ledger-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 22px; align-items: center; min-height: 64px; padding: 0 18px; border-bottom: 1px solid var(--line); }
.ledger-row span { color: #667168; font-size: 12px; font-weight: 650; }
.ledger-row strong { color: #313b33; font: 600 10px/1.2 var(--mono); font-weight: 600; }
.ledger-row b { color: var(--success); font: 750 8px/1 var(--mono); letter-spacing: .09em; }
.ledger-row .transport-label { color: #4667a3; }
.ledger-note { padding: 20px 18px 22px; background: linear-gradient(90deg, rgba(216,255,116,.22), transparent); }
.ledger-note span { color: #536f0f; font: 750 9px/1 var(--mono); letter-spacing: .1em; }
.ledger-note p { max-width: 690px; margin: 8px 0 0; color: var(--muted); font-size: var(--control-text); line-height: 1.58; }

.setup-section { background: #fff; }
.setup-header { display: grid; grid-template-columns: 1fr .64fr; gap: 96px; align-items: end; }
.setup-header p { margin: 0 0 4px; color: var(--muted); font-size: var(--copy); line-height: 1.62; }
.setup-grid { display: grid; grid-template-columns: repeat(4,1fr); margin: 66px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.setup-grid li { position: relative; min-height: 340px; padding: 22px 22px 27px; border-right: 1px solid var(--line); }
.setup-grid li:last-child { border-right: 0; }
.step-index { color: #768078; font-size: 10px; font-weight: 700; }
.step-icon { display: grid; width: 3.5rem; height: 3.5rem; place-items: center; margin-top: 48px; border: 1px solid rgba(255,255,255,.1); border-radius: .75rem; background: var(--mark-surface); color: var(--brand); font-size: 1.125rem; box-shadow: var(--mark-shadow); }
.step-icon .ui-icon { width: 1.4em; height: 1.4em; }
.setup-grid strong { display: block; margin-top: 23px; font-family: var(--display); font-size: 1.125rem; font-weight: 720; letter-spacing: -.015em; }
.setup-grid p { margin: 9px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.58; }
.setup-grid p code { padding: 1px 4px; border-radius: 4px; background: #f0f2ed; color: #39443c; font-size: .75rem; }
.setup-grid a { position: absolute; left: 22px; bottom: 26px; display: inline-flex; align-items: center; gap: .4em; color: #4e650f; font: 700 .875rem/1.2 var(--mono); }
.setup-grid a:hover, .setup-grid a:focus-visible { color: #243200; }
.objective-card { margin-top: 28px; padding: 32px 34px; border: 1px solid rgba(81,112,0,.25); border-radius: 12px; background: linear-gradient(135deg, rgba(216,255,116,.34), #f8faf5 70%); }
.objective-meta { display: flex; align-items: center; justify-content: space-between; gap: 20px; color: #4c6908; font: 750 9px/1 var(--mono); letter-spacing: .11em; }
.objective-meta b { color: #818a82; font-weight: 600; letter-spacing: .05em; }
.objective-card blockquote { max-width: 1050px; margin: 22px 0 0; font-family: var(--display); font-size: clamp(22px, 2.5vw, 34px); font-weight: 650; line-height: 1.25; letter-spacing: -.025em; }
.objective-actions { display: flex; align-items: center; gap: 17px; margin-top: 25px; }
.copy-button { min-height: 40px; padding: 0 13px; cursor: pointer; border: 1px solid var(--line-strong); border-radius: 7px; background: #fff; color: #354900; font: 750 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.copy-button:hover { border-color: rgba(81,112,0,.35); background: #fbfcf8; }
.objective-actions > span { color: #6f7971; font-size: .875rem; }

.open-source-section { padding-block: 88px; background: var(--brand); }
.open-source-layout { display: grid; grid-template-columns: .28fr 1fr auto; gap: 55px; align-items: center; }
.oss-mark { align-self: stretch; display: flex; min-height: 172px; flex-direction: column; justify-content: space-between; padding-right: 28px; border-right: 1px solid rgba(38,54,0,.18); }
.oss-mark img { width: 96px; padding: 18px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: var(--mark-surface); box-shadow: var(--mark-shadow); }
.oss-mark span { color: #263600; font: 800 11px/1 var(--mono); letter-spacing: .12em; }
.oss-copy h2 { max-width: 760px; margin-top: 0; color: #1a2500; }
.oss-copy p { max-width: 760px; margin: 18px 0 0; color: #445512; font-size: var(--copy); line-height: 1.62; }
.oss-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 15px; }
.oss-actions .button-primary { background: #11180b; border-color: #11180b; color: #fff; }
.oss-actions .button-primary:hover { background: #243029; border-color: #243029; color: #fff; }
.oss-actions .text-link { color: #2a3c00; padding-left: 4px; }

.faq-section { background: #f6f8f3; }
.faq-layout { display: grid; grid-template-columns: .62fr 1.38fr; gap: 92px; align-items: start; }
.faq-heading { position: sticky; top: 116px; }
.faq-heading > p { max-width: 480px; margin: 20px 0 0; color: var(--muted); font-size: var(--copy); line-height: 1.62; }
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-list details { border-bottom: 1px solid var(--line-strong); }
.faq-list summary { position: relative; padding: 27px 52px 27px 0; cursor: pointer; list-style: none; font-family: var(--display); font-size: 1.125rem; font-weight: 700; letter-spacing: -.01em; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-toggle { position: absolute; right: 4px; top: 50%; display: grid; width: 1.35rem; height: 1.35rem; place-items: center; color: #657066; transform: translateY(-50%); transition: transform 160ms ease, color 160ms ease; }
.faq-toggle .ui-icon { width: 1.2rem; height: 1.2rem; }
.faq-list details[open] .faq-toggle { color: #426000; transform: translateY(-50%) rotate(45deg); }
.faq-list details p { max-width: 820px; margin: -2px 0 27px; color: var(--muted); font-size: var(--copy); line-height: 1.62; }

.site-footer { background: #111713; color: #eef2ed; }
.footer-main { display: grid; grid-template-columns: 1fr auto; gap: 80px; align-items: start; padding: 57px 0 44px; }
.footer-brand { display: inline-flex; align-items: center; gap: 11px; }
.footer-brand img { width: 38px; }
.footer-brand > span { font-family: var(--display); font-size: 16px; font-weight: 700; }
.footer-brand i { margin-left: 3px; color: #88938b; font: normal 10px/1 var(--mono); letter-spacing: .09em; }
.footer-identity p { margin: 17px 0 0; color: #aab4ac; font-size: 13px; }
.footer-status { display: inline-flex; align-items: center; gap: 8px; margin-top: 19px; color: #88958b; font: 600 10px/1.2 var(--mono); }
.footer-links { display: grid; grid-template-columns: repeat(2,minmax(145px,1fr)); gap: 50px; min-width: 390px; }
.footer-links > div { display: flex; flex-direction: column; gap: 10px; }
.footer-links strong { margin-bottom: 7px; color: #edf2ed; font: 700 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.footer-links a { display: inline-flex; align-items: center; gap: .35em; color: #a2ada4; font-size: 13px; }
.footer-links a:hover, .footer-links a:focus-visible { color: #fff; }
.footer-bottom { display: flex; min-height: 63px; align-items: center; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.09); color: #7e8981; font: 600 9px/1 var(--mono); }

.not-found { min-height: 100vh; display: grid; place-items: center; background: radial-gradient(650px 460px at 72% 25%, rgba(216,255,116,.46), transparent 62%), var(--bg); }
.not-found-inner { max-width: 760px; padding-block: 90px; }
.not-found-brand { display: inline-flex; margin-bottom: 42px; }
.not-found-brand img { width: 4rem; height: 4rem; padding: .625rem; border-radius: .875rem; background: var(--mark-surface); object-fit: contain; box-shadow: var(--mark-shadow); }
.not-found h1 { margin: 18px 0 0; font-family: var(--display); font-size: clamp(42px, 6vw, 72px); font-weight: 720; line-height: 1; letter-spacing: -.05em; }
.not-found p { max-width: 680px; margin: 25px 0 31px; color: var(--muted); font-size: 16px; line-height: 1.58; }

.reveal-item { opacity: 0; transform: translateY(12px); }
.is-ready .reveal-item { animation: reveal-in 580ms cubic-bezier(.2,.8,.2,1) forwards; }
.is-ready .reveal-item:nth-child(2) { animation-delay: 70ms; }
.is-ready .reveal-item:nth-child(3) { animation-delay: 130ms; }
@keyframes reveal-in { to { opacity: 1; transform: translateY(0); } }

@media (max-width: 1180px) {
  :root { --shell: min(100% - 40px, 1320px); }
  .hero-layout { grid-template-columns: .78fr 1.22fr; gap: 40px; }
  .hero h1 { font-size: clamp(52px, 5.2vw, 70px); }
  .agent-stage { padding-left: 0; }
  .architecture-board { grid-template-columns: 1fr 92px 1.08fr 92px 1fr; }
  .why-layout, .capabilities-layout, .desktop-layout, .local-layout, .faq-layout { gap: 58px; }
  .workflow-path li { min-height: 390px; }
  .tool-group { grid-template-columns: 185px 1fr; }
}

@media (max-width: 980px) {
  .nav-shell { position: relative; }
  .menu-button { display: block; }
  .nav-links { display: none; position: absolute; top: calc(100% + 1px); left: -20px; right: -20px; margin: 0; padding: 12px 20px 20px; flex-direction: column; align-items: stretch; gap: 2px; border-bottom: 1px solid var(--line); background: rgba(250,251,248,.98); box-shadow: 0 26px 60px rgba(25,38,28,.1); }
  .nav-links.is-open { display: flex; }
  .nav-links a { display: flex; min-height: 44px; align-items: center; padding: 0 10px; border-radius: 7px; }
  .nav-links a:hover { background: #f0f3ec; }

  .hero { padding-top: 126px; }
  .hero-layout { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .hero h1 { max-width: 840px; font-size: clamp(60px, 9vw, 82px); }
  .agent-stage { max-width: 820px; margin-top: 16px; }
  .chat-card { width: 67%; }
  .hero-principles { grid-template-columns: 1fr; }
  .hero-principles > div { min-height: 0; padding: 22px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .hero-principles > div + div { padding-left: 0; }
  .hero-principles > div:last-child { border-bottom: 0; }

  .split-heading, .setup-header { grid-template-columns: 1fr; gap: 24px; }
  .split-heading > p, .setup-header p { max-width: 760px; }
  .workflow-path { grid-template-columns: 1fr 1fr; }
  .workflow-path li { min-height: 300px; border-bottom: 1px solid var(--line); }
  .workflow-path li:nth-child(2n) { border-right: 0; }
  .workflow-path li:last-child { grid-column: 1 / -1; min-height: 250px; border-bottom: 0; }
  .workflow-path li::after { display: none; }

  .why-layout, .capabilities-layout, .desktop-layout, .local-layout, .faq-layout { grid-template-columns: 1fr; }
  .why-copy, .capabilities-copy, .faq-heading { position: static; }
  .comparison-board { max-width: 820px; }
  .tool-group { grid-template-columns: 190px 1fr; }

  .architecture-board { grid-template-columns: 1fr; gap: 0; }
  .arch-node { min-height: 255px; }
  .arch-connector { width: 1px; height: 52px; margin: 0 auto; background: linear-gradient(var(--line-strong), rgba(81,112,0,.45), var(--line-strong)); }
  .arch-connector i { right: -3px; bottom: 1px; transform: rotate(135deg); }
  .arch-connector span { top: 19px; left: 16px; white-space: nowrap; }
  .arch-connector b { display: none; }
  .contract-grid { grid-template-columns: 1fr; }
  .contract-grid article:nth-child(odd) { border-right: 0; }
  .contract-grid article { border-bottom: 1px solid var(--line); }
  .contract-grid article:last-child { border-bottom: 0; }

  .desktop-copy, .local-copy { max-width: 760px; }
  .setup-grid { grid-template-columns: 1fr 1fr; }
  .setup-grid li:nth-child(2) { border-right: 0; }
  .setup-grid li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .open-source-layout { grid-template-columns: 150px 1fr; }
  .oss-actions { grid-column: 2; flex-direction: row; align-items: center; }
}

@media (max-width: 680px) {
  :root { --shell: min(100% - 28px, 1320px); }
  .site-header { background: rgba(250,251,248,.95); }
  .nav-shell { min-height: 62px; }
  .brand img { width: 1.875rem; height: 1.875rem; padding: .25rem; border-radius: .5rem; }
  .nav-source-link, .nav-cta { display: none; }
  .nav-actions { margin-left: auto; }
  .nav-links { left: -14px; right: -14px; padding-inline: 14px; }

  .hero { padding: 105px 0 0; }
  .hero-layout { gap: 35px; padding-bottom: 48px; }
  .hero h1 { font-size: clamp(3rem, 14vw, 4rem); }
  .hero-lede { font-size: 1.0625rem; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 360px; }

  .agent-stage { margin-inline: -4px; }
  .chat-card { width: 91%; border-radius: 13px 13px 5px 13px; }
  .tunnel-link { height: 52px; padding-right: 18%; }
  .tunnel-link i { right: 18%; }
  .session-window { border-radius: 11px; }
  .session-titlebar { grid-template-columns: 1fr auto; padding-inline: 11px; }
  .workspace-chip { display: none; }
  .connection-status { grid-column: 2; }
  .session-context { padding-inline: 14px; }
  .demo-tabs { overflow-x: auto; padding-inline: 8px; }
  .demo-panel { min-height: 286px; padding: 14px 13px 16px; }
  .tool-event { grid-template-columns: 30px minmax(0,1fr) auto; min-height: 58px; }
  .tool-event.is-current { margin-inline: -13px; padding-inline: 13px; }
  .tool-event small { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .session-boundaries { padding-inline: 13px; gap: 7px 10px; }
  .hero-principles > div { grid-template-columns: 28px 1fr; }

  .section { padding: 84px 0; }
  .section-heading h2, .why-copy h2, .capabilities-copy h2, .desktop-copy h2, .local-copy h2, .setup-header h2, .oss-copy h2, .faq-heading h2 { font-size: 34px; }
  .workflow-path { grid-template-columns: 1fr; }
  .workflow-path li, .workflow-path li:last-child { grid-column: auto; min-height: 0; padding-bottom: 24px; border-right: 0; border-bottom: 1px solid var(--line); }
  .workflow-path li:last-child { border-bottom: 0; }
  .workflow-path code { position: static; display: block; margin-top: 18px; }
  .path-icon { margin-top: 34px; }

  .comparison-board { grid-template-columns: 1fr; }
  .comparison-column + .comparison-column { border-left: 0; border-top: 1px solid var(--line-strong); }
  .tool-group { grid-template-columns: 1fr; gap: 18px; }
  .tool-group-heading p { max-width: 480px; }
  .tool-chips { gap: 6px; }
  .tool-chips code { min-height: 38px; font-size: var(--ui-caption); }

  .arch-node { min-height: 235px; padding: 21px; }
  .arch-node img, .repo-node-icon { margin-top: 42px; }
  .contract-grid article { grid-template-columns: 32px 1fr; padding: 21px; }

  .desktop-window { border-radius: 11px; }
  .desktop-titlebar { grid-template-columns: 1fr auto; }
  .desktop-title { display: none; }
  .desktop-body { grid-template-columns: 1fr; min-height: 0; }
  .desktop-sidebar { display: none; }
  .desktop-content { padding: 16px; }
  .session-metrics { grid-template-columns: 1fr; }
  .session-metrics article { min-height: 78px; border-right: 0; border-bottom: 1px solid var(--line); }
  .session-metrics article:last-child { border-bottom: 0; }
  .desktop-activity > div { grid-template-columns: 26px minmax(0,1fr); }
  .desktop-activity code { display: none; }
  .desktop-footer-state { align-items: flex-start; flex-direction: column; }

  .ledger-row { grid-template-columns: 1fr auto; gap: 10px; min-height: 68px; }
  .ledger-row strong { grid-row: 2; grid-column: 1 / -1; padding-bottom: 12px; }

  .setup-grid { grid-template-columns: 1fr; }
  .setup-grid li { min-height: 285px; border-right: 0; border-bottom: 1px solid var(--line); }
  .setup-grid li:last-child { border-bottom: 0; }
  .step-icon { margin-top: 34px; }
  .objective-card { padding: 23px; }
  .objective-meta b { display: none; }
  .objective-actions { align-items: flex-start; flex-direction: column; }

  .open-source-layout { grid-template-columns: 1fr; gap: 28px; }
  .oss-mark { min-height: 148px; padding: 0 0 23px; border-right: 0; border-bottom: 1px solid rgba(38,54,0,.18); }
  .oss-actions { grid-column: auto; align-items: flex-start; flex-direction: column; }
  .faq-layout { gap: 39px; }

  .footer-main { grid-template-columns: 1fr; gap: 42px; }
  .footer-links { min-width: 0; }
  .footer-bottom { min-height: 78px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 9px; }
}

@media (max-width: 430px) {
  .hero h1 { font-size: 3rem; }
  .chat-message p { font-size: var(--ui-detail); }
  .session-context code { display: none; }
  .demo-tab { padding-inline: 9px; }
  .tool-event b { display: none; }
  .session-boundaries { display: grid; grid-template-columns: 1fr 1fr; }
  .footer-links { grid-template-columns: 1fr; }
}

/* Fluid desktop scale: width and usable viewport height both influence the UI. */
@media (min-width: 73.8125rem) {
  :root {
    --shell: min(calc(100vw - clamp(2.5rem, 4vw, 6rem)), 92.5rem);
    --copy: clamp(1rem, .94rem + .06vw, 1.0625rem);
    --control-text: clamp(.9375rem, .88rem + .06vw, 1rem);
    --ui-caption: clamp(.75rem, .72rem + .03vw, .8125rem);
    --ui-detail: clamp(.875rem, .82rem + .06vw, .9375rem);
    --ui-body: clamp(.9375rem, .88rem + .07vw, 1rem);
  }

  .nav-shell { min-height: clamp(4.5rem, min(4.2vw, 7vh), 4.875rem); }
  .brand img { width: clamp(2.125rem, 1.9vw, 2.375rem); height: clamp(2.125rem, 1.9vw, 2.375rem); padding: clamp(.3125rem, .28vw, .34375rem); }
  .brand-wordmark { font-size: clamp(.9375rem, .88rem + .05vw, 1rem); }
  .brand-wordmark i { font-size: clamp(.6875rem, .64rem + .04vw, .75rem); }
  .nav-links, .nav-source-link, .button, .text-link { font-size: clamp(.9375rem, .88rem + .06vw, 1rem); }
  .button-large { min-height: clamp(3.25rem, min(3vw, 5.2vh), 3.5rem); padding-inline: clamp(1.375rem, 1.15rem + .2vw, 1.5rem); }
  .kicker, .eyebrow { font-size: clamp(.75rem, .71rem + .04vw, .8125rem); }

  .hero { padding-top: clamp(5.5rem, min(8vw, 9vh), 9.625rem); }
  .hero-layout { gap: clamp(2.5rem, 3.5vw, 4.625rem); padding-bottom: clamp(2rem, min(4.3vw, 4vh), 4.875rem); }
  .hero h1 { font-size: clamp(3.625rem, min(5.3vw, 7.2vh), 5.25rem); }
  .hero-lede { margin-top: clamp(1.125rem, min(1.6vw, 2vh), 1.8125rem); font-size: clamp(1.125rem, .98rem + .14vw, 1.25rem); line-height: 1.58; }
  .hero-actions { margin-top: clamp(1.125rem, min(1.7vw, 2vh), 1.9375rem); }


  .agent-stage { padding-top: clamp(.5rem, min(1vw, 1.2vh), 1.25rem); padding-left: clamp(.75rem, 1.3vw, 1.625rem); }
  .card-chrome, .session-titlebar { min-height: clamp(2.75rem, min(2.7vw, 4vh), 3.25rem); padding-inline: clamp(.9375rem, 1vw, 1.125rem); }
  .app-identity img { width: clamp(1.5rem, 1.35vw, 1.75rem); height: clamp(1.5rem, 1.35vw, 1.75rem); }
  .session-titlebar .app-identity img, .desktop-titlebar .app-identity img { width: clamp(1.875rem, 1.7vw, 2.125rem); height: clamp(1.875rem, 1.7vw, 2.125rem); }
  .app-identity strong { font-size: clamp(.8125rem, .75rem + .07vw, .9375rem); }
  .chat-message { padding: clamp(.75rem, min(1vw, 1.4vh), 1.25rem) clamp(1.125rem, 1.05vw, 1.3125rem); }
  .tunnel-link { height: clamp(3rem, min(3.4vw, 5vh), 4.125rem); }
  .session-context { padding: clamp(.75rem, min(.9vw, 1.4vh), 1.0625rem) clamp(1.125rem, 1.05vw, 1.3125rem); }
  .demo-tabs { min-height: clamp(2.5rem, min(2.5vw, 3.8vh), 3rem); }
  .demo-tab { min-height: clamp(2.5625rem, min(2.55vw, 3.9vh), 3.0625rem); padding-inline: clamp(.75rem, .7vw, .875rem); }
  .demo-panel { min-height: clamp(16.5rem, min(17vw, 24vh), 20rem); padding: clamp(.75rem, min(1vw, 1.4vh), 1.1875rem) clamp(1.125rem, 1.05vw, 1.3125rem) clamp(.875rem, min(1.1vw, 1.6vh), 1.3125rem); }
  .tool-event { grid-template-columns: clamp(2.125rem, 1.9vw, 2.375rem) minmax(0,1fr) auto; min-height: clamp(3rem, min(3.3vw, 5vh), 4rem); gap: clamp(.6875rem, .65vw, .8125rem); }
  .tool-event.is-current { margin-inline: calc(-1 * clamp(1.125rem, 1.05vw, 1.3125rem)); padding-inline: clamp(1.125rem, 1.05vw, 1.3125rem); }
  .check-list > div { min-height: clamp(3rem, min(3.2vw, 5vh), 3.875rem); }
  .session-boundaries { padding: clamp(.625rem, min(.85vw, 1.2vh), 1rem) clamp(1.125rem, 1.05vw, 1.3125rem); }

  .hero-principles > div { grid-template-columns: clamp(2.125rem, 1.9vw, 2.375rem) 1fr; gap: clamp(1rem, .9vw, 1.125rem); min-height: clamp(7.5rem, min(10.5vw, 10vh), 10.25rem); padding-top: clamp(1rem, min(1.8vw, 1.7vh), 1.9375rem); padding-bottom: clamp(1rem, min(1.9vw, 1.9vh), 2.0625rem); }
  .hero-principles span { font-size: clamp(.6875rem, .64rem + .04vw, .75rem); }
  .hero-principles p { font-size: var(--control-text); line-height: 1.55; }
  .hero-principles strong { font-size: clamp(1rem, .94rem + .06vw, 1.0625rem); }

  .section { padding-block: clamp(6rem, min(7vw, 11vh), 7.875rem); }
  .section-heading h2, .why-copy h2, .capabilities-copy h2, .desktop-copy h2, .local-copy h2, .setup-header h2, .oss-copy h2, .faq-heading h2 { font-size: clamp(2.125rem, min(3vw, 5.2vh), 3.5rem); }
  .section-heading > p, .split-heading > p, .why-copy > p, .capabilities-copy > p, .desktop-copy > p, .local-copy > p, .setup-header p { font-size: var(--copy); }

  .workflow-path { margin-top: clamp(4.125rem, min(3.8vw, 6vh), 4.5rem); }
  .workflow-path li { min-height: clamp(22rem, min(23vw, 36vh), 24.6875rem); padding: clamp(1.375rem, 1.25vw, 1.625rem) clamp(1.25rem, 1.15vw, 1.5rem) clamp(1.75rem, 1.55vw, 2rem); }
  .workflow-path li:not(:last-child)::after { top: clamp(6rem, min(5.5vw, 9.5vh), 6.75rem); }
  .path-index { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .path-icon { width: clamp(3.25rem, 3vw, 3.75rem); height: clamp(3.25rem, 3vw, 3.75rem); margin-top: clamp(2.5rem, min(2.7vw, 4.6vh), 3.125rem); font-size: clamp(1rem, .9rem + .1vw, 1.125rem); }
  .workflow-path strong { margin-top: clamp(1.5rem, 1.45vw, 1.75rem); font-size: clamp(1.25rem, 1.12rem + .13vw, 1.375rem); }
  .workflow-path p { font-size: var(--copy); line-height: 1.58; }
  .workflow-path code { left: clamp(1.25rem, 1.15vw, 1.5rem); right: clamp(1.25rem, 1.15vw, 1.5rem); bottom: clamp(1.6875rem, 1.45vw, 1.875rem); font-size: clamp(.625rem, .55rem + .07vw, .75rem); line-height: 1.4; }

  .comparison-label { min-height: clamp(3.375rem, min(3vw, 5.3vh), 3.75rem); padding-inline: clamp(1.125rem, 1.05vw, 1.3125rem); }
  .comparison-label span, .comparison-label b, .comparison-flow span { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .comparison-flow { padding: clamp(.5rem, .5vw, .625rem) clamp(1.125rem, 1.05vw, 1.3125rem) clamp(1rem, .9vw, 1.125rem); }
  .comparison-flow > div { grid-template-columns: clamp(1.875rem, 1.7vw, 2.125rem) 1fr; gap: clamp(.6875rem, .65vw, .8125rem); min-height: clamp(4.875rem, min(4.5vw, 8vh), 5.5rem); }
  .comparison-flow p { font-size: var(--copy); line-height: 1.55; }

  .tool-group { grid-template-columns: clamp(13.75rem, 12vw, 15rem) 1fr; gap: clamp(1.75rem, 1.6vw, 2.125rem); padding: clamp(1.75rem, min(1.7vw, 3vh), 2rem) 0 clamp(1.9375rem, min(1.9vw, 3.2vh), 2.1875rem); }
  .tool-group-heading span { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .tool-group-heading p { margin-top: clamp(.625rem, .5vw, .6875rem); font-size: var(--copy); line-height: 1.55; }
  .tool-chips { gap: clamp(.5rem, .45vw, .625rem); }
  .tool-chips code { min-height: clamp(2.4375rem, min(2.3vw, 4vh), 2.75rem); padding-inline: clamp(.6875rem, .65vw, .875rem); font-size: clamp(.6875rem, .61rem + .06vw, .8125rem); }

  .architecture-board { grid-template-columns: 1fr clamp(5.75rem, 7.8vw, 10rem) 1.12fr clamp(5.75rem, 7.8vw, 10rem) 1fr; margin-top: clamp(4.25rem, min(3.8vw, 6vh), 4.625rem); }
  .arch-node { min-height: clamp(18.75rem, min(19vw, 30vh), 20.625rem); padding: clamp(1.5625rem, 1.45vw, 1.875rem); }
  .node-index { top: clamp(1.125rem, 1vw, 1.3125rem); right: clamp(1.125rem, 1vw, 1.3125rem); }
  .arch-node img, .repo-node-icon { width: clamp(3.25rem, 3vw, 3.75rem); height: clamp(3.25rem, 3vw, 3.75rem); margin-top: clamp(3.125rem, min(2.8vw, 5vh), 3.375rem); }
  .arch-relai > img { width: clamp(4rem, 3.6vw, 4.5rem); height: clamp(4rem, 3.6vw, 4.5rem); padding: clamp(.625rem, .55vw, .7rem); }
  .repo-node-icon { font-size: clamp(1.25rem, 1.12rem + .13vw, 1.375rem); }
  .arch-node strong { margin-top: clamp(1.8125rem, 1.6vw, 1.9375rem); font-size: clamp(1.25rem, 1.12rem + .13vw, 1.375rem); }
  .arch-node p { font-size: var(--copy); line-height: 1.58; }
  .node-status { margin-top: clamp(1.3125rem, 1.15vw, 1.4375rem); padding: clamp(.5rem, .45vw, .5625rem) clamp(.625rem, .55vw, .6875rem); }
  .contract-grid article { grid-template-columns: clamp(2.5rem, 2.2vw, 2.75rem) 1fr; gap: clamp(1rem, .9vw, 1.125rem); min-height: clamp(8.875rem, min(8.5vw, 14vh), 9.625rem); padding: clamp(1.5625rem, 1.4vw, 1.75rem); }
  .contract-grid span { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .contract-grid strong { font-size: clamp(1.0625rem, .95rem + .11vw, 1.1875rem); }
  .contract-grid p { font-size: var(--copy); line-height: 1.55; }
  .openai-attribution { font-size: clamp(.6875rem, .64rem + .04vw, .75rem); }

  .desktop-layout { grid-template-columns: .6fr 1.4fr; gap: clamp(3.625rem, 4.3vw, 5.5rem); }
  .desktop-titlebar { min-height: clamp(3.25rem, min(2.9vw, 5vh), 3.625rem); padding-inline: clamp(1rem, .9vw, 1.1875rem); }
  .desktop-body { grid-template-columns: clamp(11.25rem, 9.8vw, 12.5rem) 1fr; min-height: clamp(32.5rem, min(32vw, 52vh), 35rem); }
  .desktop-sidebar { padding: clamp(1.125rem, 1vw, 1.25rem) clamp(.6875rem, .62vw, .8125rem); }
  .desktop-sidebar b { min-height: clamp(2.5rem, min(2.3vw, 4vh), 2.75rem); padding-inline: clamp(.625rem, .55vw, .75rem); }
  .desktop-sidebar b i { width: clamp(1.1875rem, 1.05vw, 1.375rem); height: clamp(1.1875rem, 1.05vw, 1.375rem); font-size: clamp(.5rem, .45rem + .04vw, .625rem); }
  .desktop-content { padding: clamp(1.375rem, 1.25vw, 1.625rem); }
  .desktop-content-head { padding-bottom: clamp(1.1875rem, 1.05vw, 1.375rem); }
  .desktop-content-head strong { font-size: clamp(1.25rem, 1.12rem + .13vw, 1.375rem); }
  .session-metrics article { min-height: clamp(6.125rem, min(5.5vw, 9.5vh), 6.75rem); padding: clamp(.9375rem, .85vw, 1.0625rem); }
  .session-metrics strong { font-size: clamp(.9375rem, .88rem + .05vw, 1rem); }
  .desktop-activity > div { grid-template-columns: clamp(1.625rem, 1.45vw, 1.875rem) minmax(0,1fr) auto; gap: clamp(.625rem, .55vw, .75rem); min-height: clamp(4.3125rem, min(3.9vw, 7vh), 4.75rem); }
  .activity-mark { width: clamp(1.375rem, 1.25vw, 1.625rem); height: clamp(1.375rem, 1.25vw, 1.625rem); font-size: clamp(.5625rem, .5rem + .04vw, .6875rem); }
  .desktop-footer-state { padding: clamp(.75rem, .65vw, .875rem) clamp(.8125rem, .72vw, .9375rem); }

  .ledger-row { min-height: clamp(4rem, min(3.7vw, 6.5vh), 4.5rem); padding-inline: clamp(1.125rem, 1.05vw, 1.3125rem); }
  .ledger-row span { font-size: clamp(.75rem, .67rem + .07vw, .875rem); }
  .ledger-row strong { font-size: clamp(.625rem, .55rem + .07vw, .8125rem); }
  .ledger-row b { font-size: clamp(.5rem, .42rem + .08vw, .75rem); }
  .ledger-note { padding: clamp(1.25rem, 1.15vw, 1.4375rem) clamp(1.125rem, 1.05vw, 1.3125rem) clamp(1.375rem, 1.2vw, 1.5625rem); }
  .ledger-note span { font-size: clamp(.5625rem, .48rem + .08vw, .75rem); }
  .ledger-note p { font-size: var(--control-text); line-height: 1.58; }

  .setup-grid { margin-top: clamp(4.125rem, min(3.8vw, 6vh), 4.5rem); }
  .setup-grid li { min-height: clamp(21.25rem, min(22vw, 34vh), 23.125rem); padding: clamp(1.375rem, 1.25vw, 1.625rem) clamp(1.375rem, 1.25vw, 1.625rem) clamp(1.6875rem, 1.5vw, 1.9375rem); }
  .step-index { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .step-icon { width: clamp(3.5rem, 3vw, 3.75rem); height: clamp(3.5rem, 3vw, 3.75rem); margin-top: clamp(2.5rem, min(2.7vw, 4.6vh), 3.125rem); font-size: clamp(1.125rem, 1.02rem + .1vw, 1.25rem); }
  .setup-grid strong { margin-top: clamp(1.4375rem, 1.3vw, 1.625rem); font-size: clamp(1.125rem, 1rem + .12vw, 1.25rem); }
  .setup-grid p { font-size: var(--copy); line-height: 1.58; }
  .setup-grid p code { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .setup-grid a { left: clamp(1.375rem, 1.25vw, 1.625rem); bottom: clamp(1.625rem, 1.4vw, 1.8125rem); font-size: var(--control-text); }
  .objective-card { margin-top: clamp(1.75rem, 1.55vw, 2rem); padding: clamp(2rem, min(1.9vw, 3.3vh), 2.25rem) clamp(2.125rem, 1.85vw, 2.375rem); }
  .objective-meta, .copy-button { font-size: clamp(.5625rem, .48rem + .08vw, .75rem); }
  .copy-button { min-height: clamp(2.5rem, min(2.3vw, 4vh), 2.75rem); padding-inline: clamp(.8125rem, .72vw, .9375rem); }
  .objective-actions > span { font-size: clamp(.75rem, .67rem + .07vw, .875rem); }

  .oss-mark img { width: clamp(6rem, 5.3vw, 6.75rem); padding: clamp(1.125rem, 1vw, 1.25rem); }
  .oss-mark span { font-size: clamp(.6875rem, .64rem + .04vw, .75rem); }
  .oss-copy p, .faq-heading > p, .faq-list details p { font-size: var(--copy); }
  .faq-list summary { padding-block: clamp(1.6875rem, min(1.6vw, 2.8vh), 1.875rem); font-size: clamp(1.125rem, 1rem + .12vw, 1.25rem); }
  .faq-list details p { margin-bottom: clamp(1.6875rem, min(1.6vw, 2.8vh), 1.875rem); }

  .footer-brand img { width: clamp(2.375rem, 2.2vw, 2.75rem); }
  .footer-brand > span { font-size: clamp(1rem, .88rem + .12vw, 1.125rem); }
  .footer-brand i, .footer-status, .footer-links strong, .footer-bottom { font-size: clamp(.625rem, .55rem + .07vw, .75rem); }
  .footer-identity p, .footer-links a { font-size: clamp(.8125rem, .75rem + .06vw, .875rem); }
}

@media print {
  .site-header, .hero-grid, .hero-actions, .menu-button, .copy-button, .site-footer { display: none !important; }
  body { background: #fff; color: #000; }
  .hero, .section { padding: 32px 0; background: #fff !important; }
  .reveal-item { opacity: 1 !important; transform: none !important; }
  a { text-decoration: underline; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal-item { opacity: 1; transform: none; }
}