/* D5-A.3: parent-brand narrative home. Other routes keep site.css. */
:root {
  --home-ink:#0d1527;
  --home-navy:#172554;
  --home-action:#315bff;
  --home-canvas:#f7f9fc;
  --home-muted:#596b8b;
  --home-line:#d9e1ef;
  --home-line-strong:#b7c3d7;
  --home-soft:#edf3ff;
  --home-mint:#67c9bd;
  --home-quick:200ms;
  --home-standard:320ms;
  --home-understanding:680ms;
  --home-ease:cubic-bezier(.2,.72,.2,1);
  color:var(--home-ink);
  background:var(--home-canvas);
  font-family:'Segoe UI',Arial,sans-serif;
  font-synthesis:none;
}
* { box-sizing:border-box; }
html,body { min-height:100%; background:var(--home-canvas); }
body { margin:0; min-height:100vh; overflow-x:hidden; font-size:17px; line-height:1.6; }
a { color:inherit; text-decoration:none; }
button { font:inherit; color:inherit; cursor:pointer; }
a,button,summary { -webkit-tap-highlight-color:transparent; touch-action:manipulation; }
:focus-visible { outline:3px solid var(--home-action); outline-offset:5px; }
figure,p,h1,h2,h3,dl,dd { margin:0; }
.home-shell,.wrap { width:min(100%,1600px); margin-inline:auto; padding-inline:clamp(20px,4.5vw,76px); }
.home-section { padding-block:clamp(76px,8vw,124px); }
.home-section h2 { max-width:760px; font-size:clamp(40px,4.25vw,64px); font-weight:560; line-height:1.04; letter-spacing:-.055em; }
h3 { font-size:clamp(25px,2.05vw,32px); font-weight:560; line-height:1.16; letter-spacing:-.035em; }
.home-muted { color:var(--home-muted); }
.home-eyebrow,.home-label,.home-meta { font-size:11px; font-weight:650; letter-spacing:.085em; text-transform:uppercase; }
.home-eyebrow { color:var(--home-muted); }
.home-meta { display:flex; gap:24px; margin-bottom:clamp(40px,5vw,72px); padding-top:16px; border-top:1px solid var(--home-line); }
.home-meta span { color:var(--home-muted); }
.home-pair { display:grid; grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr); gap:clamp(40px,8vw,128px); align-items:start; }
.home-reading { max-width:590px; font-size:clamp(18px,1.55vw,22px); line-height:1.55; }
.home-reading p+p { margin-top:20px; }
.home-section-heading { margin-bottom:clamp(48px,6vw,80px); }
.home-small,.home-reading .home-small { font-size:15px; color:var(--home-muted); }
.home-actions { display:flex; align-items:center; flex-wrap:wrap; gap:16px 24px; margin-top:30px; }
.button { display:inline-flex; min-width:44px; min-height:50px; align-items:center; justify-content:center; gap:22px; padding:12px 21px; border:1px solid transparent; border-radius:4px; font-size:14px; font-weight:650; transition:background-color var(--home-quick),transform var(--home-quick),box-shadow var(--home-quick); }
.button.primary { color:white; background:var(--home-action); }
.button.primary:hover { background:var(--home-navy); transform:translateY(-1px); }
.home-link { display:inline-flex; min-width:44px; min-height:44px; align-items:center; gap:14px; padding-block:10px; color:var(--home-action); font-size:14px; font-weight:650; }
.home-link:hover { text-decoration:underline; text-underline-offset:5px; }
.home-mark { width:36px; height:36px; flex:none; overflow:visible; color:var(--home-action); }
.home-mark path { fill:none; stroke:currentColor; stroke-width:22; stroke-linecap:round; stroke-linejoin:round; }
.home-mark circle { fill:currentColor; }
.home-sr-only { position:absolute; width:1px; height:1px; overflow:hidden; clip-path:inset(50%); white-space:nowrap; }

.skip-link { position:fixed; z-index:100; top:8px; left:16px; min-height:44px; padding:12px; transform:translateY(-200%); background:white; }
.skip-link:focus { transform:none; }
.site-header { position:relative; z-index:20; border-bottom:0; background:#fbfcff; }
.header-row { display:flex; min-height:88px; align-items:center; justify-content:space-between; gap:24px; }
.brand { display:inline-flex; min-height:44px; align-items:center; gap:10px; font-size:23px; font-weight:650; letter-spacing:-.06em; }
.desktop-nav { display:flex; align-items:center; gap:20px; }
.desktop-nav a { display:inline-flex; min-width:44px; min-height:44px; align-items:center; font-size:13px; font-weight:500; }
.desktop-nav .compact { min-height:44px; padding:8px 16px; }
.desktop-nav a:hover { text-decoration:underline; text-underline-offset:5px; }
.mobile-menu { display:none; }

/* Hero: a calm living field rather than a flat diagram. */
.home-hero {
  --hero-blue:#315bff;
  --hero-light:#9db4ff;
  --hero-mint:#67c9bd;
  position:relative;
  min-height:calc(100svh - 88px);
  overflow:clip;
  isolation:isolate;
  padding-top:clamp(34px,4.2vw,68px);
  padding-bottom:clamp(82px,8vw,128px);
}
.home-hero-backdrop {
  position:absolute;
  z-index:-3;
  inset:0 50% auto;
  width:100vw;
  height:100%;
  overflow:hidden;
  transform:translateX(-50%);
  background:
    radial-gradient(ellipse at 50% 56%,rgba(172,194,255,.30) 0,rgba(208,220,255,.13) 26%,transparent 54%),
    radial-gradient(ellipse at 10% 69%,rgba(120,158,255,.12),transparent 36%),
    radial-gradient(ellipse at 91% 68%,rgba(104,206,197,.07),transparent 32%),
    linear-gradient(180deg,#fbfcff 0%,#f8fbff 48%,#eef4ff 100%);
}
.home-hero-backdrop::before,.home-hero-backdrop::after { content:''; position:absolute; pointer-events:none; }
.home-hero-backdrop::before {
  left:-9%; right:-9%; bottom:10%; height:49%;
  opacity:.85; filter:blur(24px);
  clip-path:polygon(0 72%,14% 46%,27% 60%,43% 33%,54% 54%,67% 26%,81% 58%,91% 40%,100% 64%,100% 100%,0 100%);
  background:linear-gradient(110deg,rgba(158,187,255,.07),rgba(87,127,244,.15) 45%,rgba(111,208,198,.07) 76%,transparent);
}
.home-hero-backdrop::after {
  left:50%; bottom:1.5%; width:112vw; height:21vw;
  transform:translateX(-50%); border-radius:50% 50% 0 0;
  border-top:1px solid rgba(255,255,255,.98);
  background:linear-gradient(180deg,rgba(255,255,255,.52),rgba(215,228,255,.30));
  box-shadow:0 -22px 84px rgba(56,95,205,.09),0 -1px 0 rgba(49,91,255,.05);
}
.home-plane { position:absolute; display:block; border-radius:50%; border:1px solid rgba(49,91,255,.07); background:radial-gradient(circle,rgba(130,157,239,.08),transparent 69%); animation:home-plane-drift 18s ease-in-out infinite alternate; }
.home-plane-a { width:78vw; height:78vw; left:-34vw; top:12%; }
.home-plane-b { width:76vw; height:76vw; right:-34vw; top:9%; animation-delay:-7s; }
.home-plane-c { width:51vw; height:51vw; left:24.5vw; top:27%; opacity:.68; animation-delay:-11s; }
.home-veil { position:absolute; top:-14%; width:50vw; height:124%; opacity:.52; filter:blur(48px); animation:home-veil-drift 22s ease-in-out infinite alternate; }
.home-veil-a { left:-20vw; background:radial-gradient(ellipse,rgba(104,147,255,.17),transparent 66%); }
.home-veil-b { right:-21vw; background:radial-gradient(ellipse,rgba(102,211,199,.09),transparent 66%); animation-delay:-9s; }
.home-horizon { position:absolute; left:50%; bottom:-33vw; width:126vw; height:65vw; transform:translateX(-50%); border-radius:50% 50% 0 0; border-top:1px solid rgba(255,255,255,.95); background:linear-gradient(180deg,rgba(255,255,255,.58),rgba(218,230,255,.34)); box-shadow:0 -24px 88px rgba(72,111,220,.07); }
.home-hero-copy { position:relative; z-index:4; max-width:1320px; margin-inline:auto; text-align:center; }
.home-hero .home-eyebrow { color:#7081a6; letter-spacing:.25em; }
.home-hero h1 { max-width:1320px; margin:19px auto 19px; color:#0b1223; font-size:clamp(64px,6.15vw,102px); font-weight:680; line-height:.94; letter-spacing:-.071em; }
.home-hero h1 span { display:inline; }
.home-hero h1 em { color:var(--hero-blue); font-style:normal; text-shadow:0 11px 32px rgba(49,91,255,.09); }
.home-lead { max-width:820px; margin-inline:auto; color:#5b6c8b; font-size:clamp(18px,1.35vw,22px); line-height:1.46; }
.home-hero .home-actions { justify-content:center; margin-top:27px; }
.home-hero .button.primary { padding-inline:26px; border-radius:999px; background:#0d1527; box-shadow:0 10px 30px rgba(13,21,39,.12); }
.home-hero .button.primary:hover { background:var(--hero-blue); transform:translateY(-2px); box-shadow:0 14px 38px rgba(49,91,255,.18); }
.home-hero .home-link { color:#17233f; }

.home-interaction { position:relative; z-index:3; min-width:0; margin-top:clamp(30px,3.5vw,50px); }
.home-flow { position:relative; min-height:535px; max-width:1480px; margin-inline:auto; }
.home-flow::before,.home-flow::after { content:''; position:absolute; left:50%; top:49%; transform:translate(-50%,-50%); border-radius:50%; pointer-events:none; }
.home-flow::before { width:min(67vw,980px); height:min(36vw,520px); border:1px solid rgba(49,91,255,.055); background:radial-gradient(ellipse,rgba(255,255,255,.68) 0,rgba(207,220,255,.16) 48%,transparent 72%); }
.home-flow::after { width:min(47vw,700px); height:min(24vw,350px); border:1px solid rgba(49,91,255,.05); box-shadow:0 0 80px rgba(49,91,255,.035); }
.home-flow-routes { position:absolute; z-index:0; inset:0; width:100%; height:100%; overflow:visible; }
.home-route-rest,.home-route-active { fill:none; stroke-linecap:round; }
.home-route-rest { stroke:rgba(77,116,210,.27); stroke-width:1.35; }
.home-route-active { stroke:url(#heroRoute); stroke-width:2.35; stroke-dasharray:1; stroke-dashoffset:0; filter:drop-shadow(0 0 8px rgba(49,91,255,.34)); }
.home-route-nodes circle { fill:#fff; stroke:#789dff; stroke-width:2; filter:drop-shadow(0 0 7px rgba(49,91,255,.30)); }
.home-route-signal { fill:#fff; stroke:#315bff; stroke-width:3; }
.home-route-label { position:absolute; z-index:1; padding:2px 5px; border-radius:4px; background:rgba(249,251,255,.72); color:#6d7fa7; font-size:9px; font-weight:750; letter-spacing:.18em; text-transform:uppercase; }
.home-route-label-a { left:24.8%; top:18%; } .home-route-label-b { left:25.2%; top:46%; } .home-route-label-c { left:24.8%; top:74%; }
.home-route-label-d { right:24.8%; top:18%; } .home-route-label-e { right:25.2%; top:46%; } .home-route-label-f { right:24.8%; top:74%; }
.home-flow-side { position:absolute; z-index:2; top:50%; display:grid; width:29%; gap:17px; transform:translateY(-50%); }
.home-flow-side-in { left:0; justify-items:start; }
.home-flow-side-out { right:0; justify-items:end; }
.home-flow-card { display:flex; width:min(100%,340px); min-height:96px; align-items:center; gap:14px; padding:16px 18px; border:1px solid rgba(101,130,197,.17); border-radius:18px; background:rgba(255,255,255,.76); box-shadow:0 18px 42px rgba(49,76,135,.075),inset 0 1px 0 rgba(255,255,255,.95); backdrop-filter:blur(15px); transition:transform var(--home-standard) var(--home-ease),border-color var(--home-standard),box-shadow var(--home-standard),opacity var(--home-standard); }
.home-flow-card:hover { transform:translateY(-3px); border-color:rgba(49,91,255,.27); box-shadow:0 22px 48px rgba(49,76,135,.105),inset 0 1px 0 white; }
.home-flow-card-primary { width:min(100%,355px); background:rgba(255,255,255,.94); border-color:rgba(49,91,255,.23); box-shadow:0 22px 56px rgba(49,91,255,.11),inset 0 1px 0 white; }
.home-flow-card-secondary { width:min(88%,292px); opacity:.78; }
.home-flow-side-in .home-flow-card-secondary:nth-child(2),.home-flow-side-out .home-flow-card-secondary:nth-child(1) { transform:translateX(31px); }
.home-flow-side-in .home-flow-card-secondary:nth-child(3),.home-flow-side-out .home-flow-card-secondary:nth-child(3) { transform:translateX(10px); }
.home-flow-card-result { border-color:rgba(70,184,169,.27); box-shadow:0 22px 56px rgba(70,184,169,.095),inset 0 1px 0 white; }
.home-flow-icon { display:grid; place-items:center; flex:0 0 40px; width:40px; height:40px; border:1px solid rgba(49,91,255,.11); border-radius:12px; color:#315bff; background:linear-gradient(145deg,#edf3ff,#fff); box-shadow:0 7px 18px rgba(49,91,255,.075); font-size:16px; font-weight:700; }
.home-flow-icon-cool { color:#5875ca; }
.home-flow-icon-result { color:#168d80; border-color:rgba(55,177,161,.13); background:linear-gradient(145deg,#e8faf5,#fff); }
.home-flow-card-kicker { display:block; color:#7081a6; font-size:9px; font-weight:750; letter-spacing:.145em; text-transform:uppercase; }
.home-flow-card strong { display:block; margin-top:5px; color:#11203b; font-size:16.5px; font-weight:675; line-height:1.18; letter-spacing:-.025em; }
.home-flow-card small { display:block; margin-top:4px; color:#7b89a5; font-size:10.5px; line-height:1.35; }
.home-flow-center { position:absolute; z-index:4; left:50%; top:49%; display:flex; width:390px; min-height:390px; flex-direction:column; align-items:center; justify-content:center; transform:translate(-50%,-50%); text-align:center; }
.home-center-glow { position:absolute; width:370px; height:370px; border-radius:50%; background:radial-gradient(circle,rgba(255,255,255,.99) 0 27%,rgba(190,207,255,.48) 45%,rgba(163,188,255,.10) 62%,transparent 74%); box-shadow:0 0 92px rgba(49,91,255,.16); animation:home-breathe 6s ease-in-out infinite; }
.home-center-core { position:relative; z-index:5; display:grid; width:184px; height:184px; place-items:center; border:1px solid rgba(255,255,255,.98); border-radius:50%; background:radial-gradient(circle at 40% 34%,#fff 0 28%,rgba(235,241,255,.99) 56%,rgba(186,204,255,.70) 100%); box-shadow:inset 0 0 40px rgba(86,119,220,.13),0 22px 54px rgba(49,91,255,.15); }
.home-flow-center .home-mark { position:relative; z-index:6; width:118px; height:118px; color:var(--hero-blue); filter:drop-shadow(0 12px 20px rgba(49,91,255,.19)); }
.home-flow-center-name { position:relative; z-index:6; margin-top:18px; color:#11203b; font-size:16px; font-weight:720; letter-spacing:-.03em; }
.home-flow-center-caption { position:relative; z-index:6; margin-top:4px; color:#7586aa; font-size:8.5px; font-weight:750; letter-spacing:.21em; text-transform:uppercase; }
.home-orbit { position:absolute; z-index:2; border-radius:50%; border:1px solid rgba(49,91,255,.17); pointer-events:none; }
.home-orbit-a { width:256px; height:256px; border-top-color:rgba(49,91,255,.65); animation:home-orbit 21s linear infinite; }
.home-orbit-b { width:326px; height:326px; border-color:rgba(49,91,255,.09); border-bottom-color:rgba(49,91,255,.31); animation:home-orbit 32s linear infinite reverse; }
.home-orbit-c { width:386px; height:386px; border-style:dashed; border-color:rgba(49,91,255,.075); animation:home-orbit 44s linear infinite; }
.home-orbit-node { position:absolute; z-index:3; width:9px; height:9px; border:2px solid #fff; border-radius:50%; background:#5d7dff; box-shadow:0 0 0 4px rgba(49,91,255,.08),0 0 15px rgba(49,91,255,.27); }
.home-orbit-node-a { transform:translate(-123px,-53px); }
.home-orbit-node-b { transform:translate(134px,31px); background:#66cbbf; }
.home-orbit-node-c { transform:translate(-92px,139px); }
.home-orbit-node-d { width:7px; height:7px; transform:translate(70px,-151px); }
.home-flow-controls { display:none; justify-content:center; gap:4px; width:max-content; max-width:100%; margin:2px auto 0; padding:5px 9px; border:1px solid rgba(104,130,189,.13); border-radius:999px; background:rgba(255,255,255,.54); box-shadow:0 9px 24px rgba(49,76,135,.04); backdrop-filter:blur(10px); }
.home-enhanced .home-flow-controls { display:flex; }
.home-flow-controls button { min-height:44px; padding:8px 13px; border:0; border-radius:999px; color:#7c89a5; background:transparent; font-size:11px; font-weight:650; }
.home-flow-controls button::before { content:''; display:inline-block; width:5px; height:5px; margin-right:8px; border-radius:50%; background:#afbacb; vertical-align:middle; transition:background-color var(--home-quick),box-shadow var(--home-quick); }
.home-flow-controls button[aria-pressed="true"] { color:#17233f; background:rgba(255,255,255,.86); box-shadow:0 4px 13px rgba(49,76,135,.06); }
.home-flow-controls button[aria-pressed="true"]::before { background:var(--hero-blue); box-shadow:0 0 0 4px rgba(49,91,255,.07); }
.home-caption { margin-top:8px; text-align:center; color:#8492ad; font-size:9.5px; letter-spacing:.04em; }
.home-interaction[data-phase="origin"] .home-route-active { stroke-dashoffset:1; }
.home-interaction[data-phase="origin"] .home-flow-center,.home-interaction[data-phase="origin"] .home-flow-card-result { opacity:.43; }
.home-interaction[data-phase="understanding"] .home-route-active { animation:home-route-in var(--home-understanding) var(--home-ease) both; }
.home-interaction[data-phase="understanding"] .home-center-core { animation:home-understand var(--home-understanding) var(--home-ease) both; }
.home-interaction[data-phase="consequence"] .home-route-active { animation:home-route-out var(--home-understanding) var(--home-ease) both; }
.home-interaction[data-phase="consequence"] .home-flow-card-result { animation:home-arrive var(--home-understanding) var(--home-ease) both; }
@keyframes home-understand { from {opacity:.58;transform:scale(.95)} to {opacity:1;transform:scale(1)} }
@keyframes home-route-in { from {stroke-dashoffset:1} to {stroke-dashoffset:.48} }
@keyframes home-route-out { from {stroke-dashoffset:.48} to {stroke-dashoffset:0} }
@keyframes home-arrive { from {opacity:.35;transform:translateX(-10px)} to {opacity:1;transform:none} }
@keyframes home-plane-drift { from {transform:translate3d(0,-5px,0) scale(1)} to {transform:translate3d(11px,9px,0) scale(1.018)} }
@keyframes home-veil-drift { from {transform:translate3d(0,-6px,0)} to {transform:translate3d(18px,12px,0)} }
@keyframes home-breathe { 0%,100% {transform:scale(.985);opacity:.84} 50% {transform:scale(1.025);opacity:1} }
@keyframes home-orbit { to { transform:rotate(360deg); } }

.home-band,.home-control-band { background:var(--home-navy); color:white; }
.home-band .home-meta,.home-control-band .home-meta { border-color:#53618a; }
.home-band .home-meta span,.home-band .home-reading,.home-band .home-label,.home-control-band .home-meta span,.home-control-band .home-reading,.home-control-band .home-label { color:#c5cee3; }
.home-friction-row { display:grid; grid-template-columns:34px 1fr 26px 1fr 26px 1fr; align-items:center; gap:24px; padding-block:30px; border-top:1px solid #53618a; font-size:17px; }
.home-friction-row strong { font-weight:600; }
.home-direction { color:#91b6ff; }
.home-capabilities { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); margin-bottom:36px; }
.home-capabilities article { padding:26px; border-top:2px solid var(--home-action); border-right:1px solid var(--home-line); }
.home-capabilities article:first-child { padding-left:0; }
.home-capabilities article:last-child { padding-right:0; border-right:0; }
.home-capabilities h3 { margin-block:34px 20px; }
.home-capabilities p { color:var(--home-muted); font-size:16px; }
.home-application-rail { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); border-top:1px solid var(--home-line-strong); }
.home-application-rail article { display:flex; min-height:390px; flex-direction:column; align-items:flex-start; padding:32px 30px 22px; border-right:1px solid var(--home-line); }
.home-application-rail article:first-child { padding-left:0; }
.home-application-rail article:last-child { padding-right:0; border-right:0; }
.home-application-rail h3 { margin-block:36px 20px; font-size:clamp(27px,2.25vw,35px); }
.home-application-rail p { color:var(--home-muted); font-size:16px; }
.home-application-rail .home-link { margin-top:auto; padding-top:30px; }
.home-method { position:relative; display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); margin:12px 0 36px; padding:0; list-style:none; }
.home-method::before { content:''; position:absolute; top:0; right:0; left:0; height:2px; background:linear-gradient(90deg,var(--home-action),#89adff); }
.home-method li { position:relative; min-height:230px; padding:38px 38px 30px 0; }
.home-method li::before { content:''; position:absolute; top:-4px; left:0; width:10px; height:10px; border-radius:50%; background:var(--home-action); box-shadow:0 0 0 5px var(--home-canvas); }
.home-method li:not(:last-child)::after { content:'→'; position:absolute; top:38px; right:18px; color:var(--home-action); font-size:20px; line-height:1; }
.home-method .home-label { color:var(--home-action); }
.home-method h3 { margin-block:28px 16px; font-size:clamp(27px,2.25vw,34px); }
.home-method p { max-width:210px; color:var(--home-muted); font-size:15px; }
.home-control-intro { display:grid; grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr); gap:clamp(40px,8vw,128px); margin-bottom:clamp(64px,8vw,108px); }
.home-control-band h2 { color:white; }
.home-control { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); margin:0; border-top:1px solid #53618a; counter-reset:control; }
.home-control div { position:relative; min-height:320px; padding:40px 30px 30px 52px; border-right:1px solid #53618a; counter-increment:control; }
.home-control div:first-child { padding-left:0; }
.home-control div:last-child { padding-right:0; border-right:0; }
.home-control div::before { content:'0' counter(control); display:block; margin-bottom:64px; color:#91b6ff; font-size:13px; font-weight:650; }
.home-control dt { font-size:clamp(31px,2.75vw,42px); font-weight:550; line-height:1.06; letter-spacing:-.045em; }
.home-control dd { max-width:260px; margin-top:22px; color:#c5cee3; font-size:16px; line-height:1.5; }
.home-next { padding-bottom:clamp(96px,10vw,150px); }
.home-next .button { margin-top:28px; }
.site-footer { margin:0; overflow:clip; padding-block:56px 24px; color:white; background:var(--home-navy); }
.footer-grid { display:grid; grid-template-columns:1.6fr .8fr 1fr 1fr; gap:32px; }
.site-footer .home-mark { color:white; }
.footer-positioning { max-width:360px; margin-top:24px; font-size:20px; line-height:1.3; }
.fine-print { margin-top:16px; color:#c5cee3; font-size:11px; }
.fine-print strong { font-weight:500; }
.site-footer h2 { margin:12px 0 20px; font-size:11px; letter-spacing:.08em; text-transform:uppercase; }
.site-footer a:not(.brand) { display:flex; min-width:44px; min-height:44px; align-items:center; overflow-wrap:anywhere; font-size:13px; }
.site-footer a:hover { text-decoration:underline; }
.footer-bottom { display:flex; justify-content:space-between; gap:24px; margin-top:32px; padding-top:32px; border-top:1px solid #53618a; color:#c5cee3; font-size:11px; }

@media (max-width:1150px) {
  .desktop-nav { display:none; }
  .mobile-menu { display:block; }
  .mobile-menu summary { display:flex; min-width:64px; min-height:44px; align-items:center; justify-content:center; border:1px solid var(--home-line-strong); border-radius:4px; font-size:14px; cursor:pointer; list-style:none; }
  .mobile-menu summary::-webkit-details-marker { display:none; }
  .mobile-menu nav { position:absolute; top:76px; right:20px; width:min(320px,calc(100vw - 40px)); padding:16px; border:1px solid var(--home-line-strong); background:var(--home-canvas); box-shadow:0 12px 24px #10203a14; }
  .mobile-menu nav a { display:flex; min-height:44px; align-items:center; padding-inline:8px; font-size:14px; }
  .home-hero { min-height:auto; padding-top:56px; }
  .home-hero h1 { font-size:clamp(62px,8.7vw,92px); }
  .home-flow { min-height:485px; }
  .home-flow-side { width:31%; }
  .home-flow-card { max-width:285px; }
  .home-flow-card-secondary { max-width:245px; }
  .home-route-label { display:none; }
  .home-flow-center { width:320px; min-height:320px; }
  .home-center-glow { width:300px; height:300px; }
  .home-center-core { width:152px; height:152px; }
  .home-flow-center .home-mark { width:96px; height:96px; }
  .home-orbit-a { width:214px; height:214px; }
  .home-orbit-b { width:266px; height:266px; }
  .home-orbit-c { width:304px; height:304px; }
  .home-capabilities { grid-template-columns:repeat(2,minmax(0,1fr)); gap:32px; }
  .home-capabilities article { padding:24px 0; border-right:0; }
  .home-application-rail,.home-control { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .home-application-rail article:nth-child(2),.home-control div:nth-child(2) { border-right:0; }
  .home-application-rail article:nth-child(3),.home-application-rail article:nth-child(4),.home-control div:nth-child(n+3) { border-top:1px solid var(--home-line); }
  .home-application-rail article:nth-child(3) { padding-left:0; }
  .footer-grid { grid-template-columns:1.5fr 1fr; gap:32px 48px; }
}

@media (max-width:820px) {
  .header-row { min-height:76px; }
  .brand { font-size:22px; }
  .home-section { padding-block:70px; }
  .home-meta { gap:16px; margin-bottom:36px; }
  .home-pair,.home-control-intro { grid-template-columns:1fr; gap:30px; }
  .home-reading { font-size:18px; }
  .home-hero { padding-block:48px 74px; }
  .home-hero h1 { max-width:650px; font-size:clamp(53px,12vw,75px); line-height:.94; }
  .home-hero h1 span { display:block; }
  .home-flow { display:grid; grid-template-columns:1fr; gap:20px; max-width:560px; min-height:0; margin-inline:auto; }
  .home-flow::before { width:120%; height:48%; top:49%; }
  .home-flow::after,.home-flow-routes,.home-route-label { display:none; }
  .home-flow-side { position:relative; top:auto; right:auto; left:auto; width:100%; transform:none; justify-items:stretch; }
  .home-flow-side-in { order:1; }
  .home-flow-center { position:relative; left:auto; top:auto; order:2; width:100%; min-height:260px; transform:none; }
  .home-flow-side-out { order:3; }
  .home-flow-card { width:100%; max-width:none; }
  .home-flow-card-secondary { display:none; }
  .home-center-glow { width:250px; height:250px; }
  .home-center-core { width:145px; height:145px; }
  .home-orbit-b { width:248px; height:248px; }
  .home-orbit-c { width:280px; height:280px; }
  .home-friction-row { grid-template-columns:24px 1fr; gap:10px 16px; }
  .home-friction-row>*:not(:first-child) { grid-column:2; }
  .home-friction-row .home-direction { font-size:0; line-height:1; }
  .home-friction-row .home-direction::after { content:'↓'; font-size:18px; }
  .home-method { grid-template-columns:1fr; margin-top:0; }
  .home-method::before { display:none; }
  .home-method li { min-height:0; padding:20px 0 28px 30px; border-left:1px solid var(--home-line-strong); }
  .home-method li::before { top:28px; left:-5px; width:8px; height:8px; box-shadow:0 0 0 4px var(--home-canvas); }
  .home-method li:not(:last-child)::after { content:'↓'; top:auto; right:auto; bottom:-4px; left:8px; font-size:17px; }
  .home-method h3 { display:inline; margin-left:16px; font-size:27px; }
  .home-method p { max-width:420px; margin-top:12px; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .footer-intro { grid-column:1/-1; }
  .footer-bottom { flex-direction:column; gap:12px; }
}

@media (max-width:600px) {
  .home-hero { padding-block:40px 62px; }
  .home-hero h1 { margin-block:18px 22px; font-size:clamp(49px,14.5vw,67px); }
  .home-eyebrow { max-width:100%; font-size:9px; letter-spacing:.15em; }
  .home-lead { font-size:17px; }
  .home-actions { flex-direction:column; align-items:stretch; gap:6px; }
  .home-actions .button { width:100%; }
  .home-actions .home-link { justify-content:center; }
  .home-flow-center { min-height:230px; }
  .home-flow-center .home-mark { width:88px; height:88px; }
  .home-flow-controls { max-width:100%; flex-wrap:wrap; }
  .home-flow-controls button { padding-inline:10px; }
  .home-caption { max-width:270px; margin-inline:auto; }
  .home-plane-a { width:112vw; height:112vw; left:-58vw; }
  .home-plane-b { width:112vw; height:112vw; right:-60vw; }
  .home-horizon { bottom:-46vw; width:146vw; height:80vw; }
  .home-capabilities,.home-application-rail,.home-control { grid-template-columns:1fr; }
  .home-capabilities { gap:16px; }
  .home-capabilities h3 { margin-block:20px 16px; }
  .home-application-rail article,.home-application-rail article:first-child,.home-application-rail article:nth-child(2),.home-application-rail article:nth-child(3),.home-application-rail article:last-child { min-height:0; padding:28px 0 36px; border-top:1px solid var(--home-line); border-right:0; }
  .home-application-rail h3 { margin-block:24px 16px; }
  .home-application-rail .home-link { margin-top:20px; padding-top:8px; }
  .home-control div,.home-control div:first-child,.home-control div:last-child { min-height:0; padding:34px 0 40px; border-top:1px solid #53618a; border-right:0; }
  .home-control div::before { margin-bottom:28px; }
  .home-control dt { font-size:34px; }
  .home-control dd { max-width:none; font-size:16px; }
  .home-section h2 { font-size:39px; }
  .home-next .button { width:100%; }
  .footer-grid { grid-template-columns:1fr; }
  .footer-intro { grid-column:auto; }
  .site-footer h2 { margin-bottom:8px; }
}

@media (prefers-reduced-motion:reduce) {
  *,*::before,*::after { animation:none!important; transition:none!important; scroll-behavior:auto!important; }
  .home-route-active { stroke-dashoffset:0!important; }
  .home-route-signal { display:none; }
}
/* Chapter 02 only. The approved Hero and later chapters retain their CSS. */
.friction-chapter {
  --friction-ember:#b96e4f;
  position:relative; isolation:isolate; overflow:hidden;
  color:#edf1ff;
  background:linear-gradient(180deg,#f2f7fe 0%,#e9effb 17%,#cbd6ee 28%,#45587f 38%,#293b60 47%,#1b284a 59%,#111a36 82%);
}
.friction-chapter .friction-atmosphere { position:absolute; inset:0; z-index:-1; pointer-events:none; }
.friction-chapter .friction-atmosphere::before { content:''; position:absolute; inset:0; background:radial-gradient(ellipse at 12% 17%,#f6f9ff44,transparent 35%),radial-gradient(ellipse at 85% 43%,#728ccc38,transparent 40%); }
.friction-chapter .friction-atmosphere span { position:absolute; width:80%; height:64%; top:36%; left:-25%; border-right:1px solid #dbe5ff26; background:linear-gradient(110deg,transparent 35%,#15224138); transform:skewX(-19deg); }
.friction-chapter .friction-atmosphere span:nth-child(2) { left:11%; top:44%; width:55%; background:linear-gradient(110deg,transparent,#0b153447); }
.friction-chapter .friction-atmosphere span:nth-child(3) { left:58%; top:49%; width:24%; background:linear-gradient(110deg,transparent,#0b15347a); }
.friction-chapter .friction-intro { position:relative; padding-top:100px; padding-bottom:90px; color:#172544; }
.friction-chapter .friction-intro::before { content:''; position:absolute; top:0; left:50%; width:1px; height:62px; background:linear-gradient(#96add4,#315bff); }
.friction-chapter .friction-meta { display:flex; gap:25px; font-size:11px; font-weight:650; letter-spacing:.18em; text-transform:uppercase; margin-bottom:36px; color:#4b6086; }
.friction-chapter h2 { font-size:clamp(38px,4.05vw,64px); font-weight:500; line-height:1.12; letter-spacing:-.052em; max-width:1150px; }
.friction-chapter h2 span { color:#4f6289; }
.friction-chapter .friction-premise { max-width:440px; margin:28px 0 0 auto; font-size:18px; line-height:1.65; color:#3f5278; }
.friction-chapter .friction-field { position:relative; height:665px; margin-top:35px; }
.friction-chapter .friction-origin { position:absolute; top:0; left:calc(4.5% + 7.5%); font-size:12px; letter-spacing:.045em; color:#172544; padding-left:22px; }
.friction-chapter .friction-route { position:absolute; width:91%; height:640px; top:0; left:4.5%; overflow:visible; fill:none; stroke-linecap:round; stroke-linejoin:round; }
.friction-chapter .friction-route-ghost { stroke:#d5e2ff; stroke-width:1; opacity:.13; }
.friction-chapter .friction-route-live { stroke:url(#frictionSignal); stroke-width:2; }
.friction-chapter .friction-route-fragment { stroke:#bdcbed; stroke-width:1.5; opacity:.7; }
.friction-chapter .friction-route-echo { stroke:#b3c6ee; stroke-width:1; opacity:.23; }
.friction-chapter .friction-route-nodes { fill:#c5d2ff; stroke:#e7edff; stroke-width:1; }
.friction-chapter .friction-route-nodes circle:first-child { fill:#315bff; }
.friction-chapter .friction-route-stops { stroke:var(--friction-ember); stroke-width:2; }
.friction-chapter .friction-route-destination { stroke:#b8c7e9; stroke-width:1; opacity:.4; }
.friction-chapter .friction-states { list-style:none; padding:0; margin:0; position:absolute; inset:0 4.5%; }
.friction-chapter .friction-state { position:absolute; width:245px; padding-left:22px; }
.friction-chapter .friction-index { display:block; color:#bbc9e9; font-size:10px; letter-spacing:.16em; margin-bottom:9px; }
.friction-chapter .friction-state h3 { font-size:27px; line-height:1.2; font-weight:500; letter-spacing:-.035em; margin-bottom:10px; }
.friction-chapter .friction-state p { color:#c6d1e9; font-size:15px; line-height:1.6; }
.friction-chapter .friction-wait { top:166px; left:7.5%; }
.friction-chapter .friction-disconnect { top:326px; left:31%; }
.friction-chapter .friction-repeat { top:465px; left:52.5%; }
.friction-chapter .friction-lost { top:585px; left:71%; }
.friction-chapter .friction-distance { position:absolute; left:11.3%; top:515px; color:#bdcbe7; font-size:12px; letter-spacing:.065em; }
.friction-chapter .friction-distance::before { content:''; display:block; width:40px; height:1px; margin-bottom:16px; background:#aabbdf55; }
.friction-chapter .friction-ending { position:relative; padding-top:145px; padding-bottom:105px; }
.friction-chapter .friction-ending p { max-width:760px; font-size:clamp(34px,3.4vw,54px); letter-spacing:-.045em; line-height:1.16; font-weight:400; }
.friction-chapter .friction-ending p span { color:#b9c6e6; }
.friction-chapter .friction-unfinished { position:absolute; top:170px; bottom:0; left:82%; width:1px; background:linear-gradient(#8295bc77,#8295bc00 55%); }
.friction-chapter .friction-unfinished i { position:absolute; top:0; width:5px; height:5px; left:-2px; border-radius:50%; background:var(--friction-ember); }
.friction-chapter .friction-unfinished b { position:absolute; top:115px; height:150px; width:1px; left:24px; background:linear-gradient(#a8b9df44,transparent); }
@media (prefers-reduced-motion:no-preference) {
  .friction-chapter[data-entered] .friction-route-live { animation:friction-attempt 1800ms cubic-bezier(.2,.72,.2,1) both; }
  .friction-chapter[data-entered] .friction-atmosphere span { animation:friction-compress 2400ms ease-out both; }
}
@keyframes friction-attempt { from { stroke-dasharray:1; stroke-dashoffset:1; } to { stroke-dasharray:1; stroke-dashoffset:0; } }
@keyframes friction-compress { from { translate:-6px 0; } to { translate:0 0; } }
@media (max-width:900px) {
  .friction-chapter { background:#111a36; }
  .friction-chapter .friction-intro { padding-top:80px; padding-bottom:75px; background:linear-gradient(#f2f7fe,#e1e9f8 70%,#aebcda); }
  .friction-chapter .friction-premise { margin-left:0; max-width:430px; }
  .friction-chapter .friction-field { height:auto; margin-top:0; padding-top:74px; padding-bottom:0; background:linear-gradient(#aebcda,#344369 100px,transparent 300px); }
  .friction-chapter .friction-origin { top:0; left:clamp(20px,4.5vw,76px); padding-left:38px; color:#172544; }
  .friction-chapter .friction-origin::before { content:''; position:absolute; left:7px; top:8px; width:6px; height:6px; border-radius:50%; background:#a6bcff; }
  .friction-chapter .friction-route { display:none; }
  .friction-chapter .friction-states { position:relative; inset:auto; }
  .friction-chapter .friction-state { position:relative; width:auto; top:auto; left:auto; padding:0 0 60px 38px; margin:0; min-height:160px; }
  .friction-chapter .friction-state::before { content:''; position:absolute; left:10px; top:-53px; width:1px; height:76px; background:#b8c9f1aa; }
  .friction-chapter .friction-state::after { content:''; position:absolute; left:6px; top:23px; width:9px; height:2px; background:var(--friction-ember); }
  .friction-chapter .friction-disconnect::before { left:15px; }
  .friction-chapter .friction-repeat::before { border:1px solid #b8c9f166; border-bottom:0; width:8px; background:none; }
  .friction-chapter .friction-lost::before { background:linear-gradient(#b8c9f1aa,transparent); }
  .friction-chapter .friction-state h3 { font-size:27px; }
  .friction-chapter .friction-state p { font-size:16px; }
  .friction-chapter .friction-distance { position:relative; top:auto; left:auto; display:block; padding-left:38px; margin-top:0; }
  .friction-chapter .friction-ending { padding-top:70px; padding-bottom:120px; }
  .friction-chapter .friction-ending p { max-width:540px; }
  .friction-chapter .friction-unfinished { left:auto; right:36px; top:auto; height:75px; }
  .friction-chapter .friction-unfinished b { top:40px; height:35px; left:12px; }
}

.friction-chapter .friction-wait .friction-index,.friction-chapter .friction-wait p { color:#f4f7ff; }