/* ============================================================
   Sovereign AI infrastructure — landing page
   Tokens verified for WCAG-AA (see DESIGN.md)
   ============================================================ */

/* ---------- Fonts (self-hosted, OFL) ---------- */
@font-face{font-family:"Space Grotesk";src:url("fonts/space-grotesk-500.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("fonts/space-grotesk-600.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("fonts/space-grotesk-700.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Geist";src:url("fonts/geist-sans-400.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Geist";src:url("fonts/geist-sans-500.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Geist";src:url("fonts/geist-sans-600.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("fonts/geist-mono-400.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Geist Mono";src:url("fonts/geist-mono-500.woff2") format("woff2");font-weight:500;font-display:swap}

/* ---------- Tokens ---------- */
:root{
  --paper:#F6F9FB;
  --surface:#FFFFFF;
  --ink:#0D1B2A;
  --ink-2:rgba(13,27,42,.62);
  --ink-3:rgba(13,27,42,.45);      /* decorative only */
  --verify:#0E9C78;                /* graphic, 3.29:1 on paper */
  --verify-ink:#087B5E;            /* text, 4.96:1 on paper */
  --verify-bright:#0FA47F;         /* on dark bands only, 5.50:1 on ink */
  --verify-wash:rgba(14,156,120,.07);
  --hold:#BD7710;                  /* graphic, 3.42:1 on paper */
  --hold-ink:#8A5407;              /* text, 5.93:1 on paper */
  --hold-fill:rgba(232,161,58,.14);/* wash only, never meaning alone */
  --line:#DCE6EC;
  --line-mid:rgba(13,27,42,.22);
  --line-strong:rgba(13,27,42,.34);
  --f-disp:"Space Grotesk",ui-sans-serif,system-ui,"Helvetica Neue",Arial,sans-serif;
  --f-body:"Geist",ui-sans-serif,system-ui,"Helvetica Neue",Arial,sans-serif;
  --f-mono:"Geist Mono",ui-monospace,"SF Mono",SFMono-Regular,Menlo,monospace;
  --wrap:1140px;
  --r:14px;
}
:root[data-palette="blue"]{
  --verify:#2E6BEA;
  --verify-ink:#2563EB;
  --verify-bright:#6B9CFF;
  --verify-wash:rgba(46,107,234,.07);
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:400 1.0625rem/1.65 var(--f-body);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:clip;
}
h1,h2,h3,p,ul,ol,li,figure{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
b{font-weight:600}
svg{display:block}
::selection{background:rgba(14,156,120,.18)}
:focus-visible{outline:2px solid var(--verify-ink);outline-offset:3px;border-radius:4px}
.dark :focus-visible{outline-color:var(--verify-bright)}

.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(20px,4vw,40px)}
.mono{font-family:var(--f-mono)}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:fixed;top:-60px;left:16px;z-index:200;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;font-size:.9rem;transition:top .2s}
.skip:focus-visible{top:12px}
.measure{max-width:62ch}

/* ---------- Type ---------- */
h1{font:700 clamp(2.5rem,5.4vw + .6rem,4.35rem)/1.04 var(--f-disp);letter-spacing:-.032em;max-width:19ch}
h1 em{font-style:normal;color:var(--verify-ink)}
.h2{font:600 clamp(1.75rem,2.6vw + .7rem,2.65rem)/1.1 var(--f-disp);letter-spacing:-.022em}
.h2-big{font-size:clamp(2.1rem,3.8vw + .7rem,3.5rem)}
.h3{font:600 1.3rem/1.25 var(--f-disp);letter-spacing:-.01em}
.h3-note{font-size:.7rem;letter-spacing:.06em;color:var(--ink-2);font-weight:400;margin-left:12px}
.lede{font-size:clamp(1.06rem,.5vw + .95rem,1.19rem);color:var(--ink-2);max-width:62ch;margin-top:24px}
.body-l{font-size:clamp(1.1rem,.5vw + 1rem,1.3rem);line-height:1.6;color:var(--ink-2)}
.body-m{font-size:1.0625rem;color:var(--ink-2)}
.body-s{font-size:.97rem;color:var(--ink-2)}

.eyebrow{
  font:500 .6875rem/1 var(--f-mono);letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-2);display:flex;align-items:center;gap:12px;margin-bottom:22px;
}
.eyebrow.rule::after{content:"";flex:1;height:1px;background:var(--line)}
.tag{
  font:500 .6875rem/1 var(--f-mono);letter-spacing:.18em;text-transform:uppercase;
  color:var(--verify-ink);display:flex;align-items:center;gap:8px;margin:0 0 10px;
}
.tag::before{content:"";width:7px;height:7px;border:1.5px solid var(--verify);border-radius:2px}

.pulse{width:7px;height:7px;border-radius:50%;background:var(--verify);display:inline-block;position:relative;flex:none}
.pulse::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:1px solid var(--verify);opacity:0;animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{transform:scale(.4);opacity:.7}70%{transform:scale(1.15);opacity:0}100%{opacity:0}}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font:500 .95rem/1 var(--f-body);padding:13px 22px;border-radius:9px;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .18s,color .18s,border-color .18s,transform .18s;
}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--verify-ink);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line-mid);color:var(--ink)}
.btn-ghost:hover{border-color:var(--verify-ink);color:var(--verify-ink)}
.btn-ghost .arr{transition:transform .18s}
.btn-ghost:hover .arr{transform:translateX(3px)}
.btn-paper{background:var(--paper);color:var(--ink)}
.btn-paper:hover{background:#fff;transform:translateY(-1px)}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:100;background:rgba(246,249,251,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .25s}
.nav.scrolled{border-bottom-color:var(--line)}
.nav-in{display:flex;align-items:center;gap:32px;height:66px}
.brand{display:inline-flex;align-items:center;color:var(--ink)}
.brand-name{font:700 1.32rem/1 var(--f-disp);letter-spacing:.045em}
/* the X symbol: two sliced beams; the accent beam follows the palette */
.bx{height:.8em;width:.84em;display:inline-block;vertical-align:baseline;margin-left:.1em}
.bx .x-ink{fill:currentColor}
.bx .x-acc{fill:var(--verify)}
.dark .bx .x-acc{fill:var(--verify-bright)}
.nav nav{margin-left:auto}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:.93rem;color:var(--ink-2);transition:color .15s;padding:6px 2px}
.nav-links a:hover{color:var(--ink)}
.nav-cta{flex:none;padding:10px 18px}
.nav-cta-mobile{display:none}
.nav-toggle{display:none;background:none;border:0;padding:10px;cursor:pointer}
.bars{display:block;width:20px;height:2px;background:var(--ink);position:relative;transition:background .15s}
.bars::before,.bars::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink);transition:transform .2s,top .2s}
.bars::before{top:-6px}
.bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .bars{background:transparent}
.nav-toggle[aria-expanded="true"] .bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars::after{top:0;transform:rotate(-45deg)}

/* ---------- Sections ---------- */
.section{padding-block:clamp(84px,9vw,148px)}
.band{background:var(--surface);border-block:1px solid var(--line)}
.section .h2{margin-bottom:18px}
.section .eyebrow + .h2{margin-top:0}

/* ---------- Hero ---------- */
.hero{
  padding-block:clamp(96px,12vh,160px) clamp(72px,8vw,110px);
  background-image:
    linear-gradient(to right,rgba(13,27,42,.033) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(13,27,42,.033) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:linear-gradient(to bottom,#000 60%,transparent 100%);
  mask-image:linear-gradient(to bottom,#000 60%,transparent 100%);
}
.hero .eyebrow{margin-bottom:26px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px;align-items:center}
.hero .trace-panel{margin-top:clamp(44px,6vw,72px)}
.soul{font:400 .78rem/1 var(--f-mono);letter-spacing:.1em;color:var(--ink-2);margin-top:16px}

/* ---------- Cards ---------- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:28px;
}
.card h3{font:600 1.13rem/1.3 var(--f-disp);letter-spacing:-.01em;margin-bottom:10px}
.card p{font-size:.96rem;color:var(--ink-2);line-height:1.62}
.ic{width:30px;height:30px;margin-bottom:20px;fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.ic .ic-hold{stroke:var(--hold)}
.ic .ic-dash{stroke-dasharray:2 5;stroke:var(--line-strong)}

/* ---------- Pillars + mini diagrams ---------- */
.pillar{display:flex;flex-direction:column}
.mini{
  margin:-28px -28px 20px;padding:16px 14px 10px;
  background:#FBFDFE;border-bottom:1px solid var(--line);
  border-radius:var(--r) var(--r) 0 0;
}
.mini svg{width:100%;height:auto}

/* ---------- Diagram grammar (shared) ---------- */
.dl{font:500 11px var(--f-mono);letter-spacing:.08em;fill:var(--ink)}
.dl-sub{font-size:8.5px;fill:var(--ink-2);letter-spacing:.1em}
.dl-dim{fill:var(--ink-2);font-size:9.5px;letter-spacing:.14em}
.dl-step{fill:var(--verify-ink);font-size:10px;letter-spacing:.12em}
.dl-v{fill:var(--verify-ink);font-size:9.5px;letter-spacing:.12em}
.dl-h{fill:var(--hold-ink);font-size:9.5px;letter-spacing:.12em}
.d-node rect{fill:var(--surface);stroke:var(--line-mid);stroke-width:1.3}
.d-node-v rect{stroke:var(--verify);fill:var(--verify-wash)}
.d-node-h rect{stroke:var(--hold);fill:var(--hold-fill)}
.d-node-dim rect{stroke:var(--line-mid);stroke-dasharray:0;fill:transparent}
.d-ghost rect{stroke:var(--line-mid);stroke-dasharray:4 4;fill:transparent}
.d-ghost .dl{fill:var(--ink-2)}
.d-rail{fill:none;stroke:var(--line-strong);stroke-width:1.5}
.d-path{fill:none;stroke:var(--line-strong);stroke-width:1.5}
.d-path-v{fill:none;stroke:var(--verify);stroke-width:2}
.d-path-v.thin{stroke-width:1.3}
.d-hold-path{fill:none;stroke:var(--hold);stroke-width:2}
.d-fail-path{fill:none;stroke:var(--line-strong);stroke-width:1.5;stroke-dasharray:3 4}
.d-gate path{stroke:var(--ink);stroke-width:2.6;fill:none}
.d-fw{fill:none;stroke:var(--line-strong);stroke-width:1.4;stroke-dasharray:7 7}
.d-lock{fill:none;stroke:var(--ink-2);stroke-width:1.2}
.d-x{stroke:var(--ink-2);stroke-width:1.6;fill:none}
.d-stopped rect{fill:var(--surface);stroke:var(--line-mid);stroke-width:1.3}
.d-audit rect,.d-audit{fill:rgba(13,27,42,.04);stroke:var(--line-strong);stroke-width:1.3}
.d-audit-line{fill:none;stroke:var(--line-strong);stroke-width:1.2;stroke-dasharray:2 5}
.dscroll{overflow-x:auto;padding-block:4px}
.dscroll > svg{width:100%;height:auto}
.dscroll > svg.dv-desktop{min-width:720px}
.mini .dscroll{overflow:visible}
/* portrait diagram variants: swapped in below 860px so nothing side-scrolls */
.dv-mobile{display:none;max-width:470px;margin-inline:auto}
@media (max-width:860px){
  .dv-desktop{display:none}
  .dv-mobile{display:block}
}

/* draw-in for big diagrams */
html.js .d2 .d-path-v, html.js .d2 .d-path,
html.js .d4 .d-path-v, html.js .d4 .d-hold-path, html.js .d4 .d-fail-path{
  stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset 1.1s ease .15s;
}
html.js .drawn .d-path-v,html.js .drawn .d-path,
html.js .drawn .d-hold-path,html.js .drawn .d-fail-path{stroke-dashoffset:0}

/* D2 request dots */
.d2-dot{fill:var(--verify);opacity:0}
.d2-dot-b{fill:var(--ink);}

/* ---------- Architecture 3D plate ---------- */
.arch-wrap{display:grid;grid-template-columns:1fr;gap:clamp(24px,3vw,44px);margin-top:52px}
.arch-fit{width:100%;min-width:0}
/* no-JS fallback: the fixed 880px stage scrolls instead of clipping */
html:not(.js) .arch-fit{overflow-x:auto}
html:not(.js) .arch-scene{width:880px;max-width:none}
.arch-scene{--sw:880px;--sh:560px;width:calc(var(--sw) * var(--as,1));height:calc(var(--sh) * var(--as,1));margin-inline:auto;max-width:100%}
.arch-stage{width:var(--sw,880px);height:var(--sh,560px);transform:scale(var(--as,1));transform-origin:0 0;perspective:1500px}
.arch-plate{
  position:relative;width:460px;height:300px;margin:224px 0 0 170px;
  transform-style:preserve-3d;
  transform:rotateX(calc(var(--rx,57)*1deg)) rotateZ(calc(var(--rz,-40)*1deg));
}
.arch-layer{
  position:absolute;inset:0;border-radius:12px;
  background:rgba(255,255,255,.92);border:1px solid var(--line-mid);
  box-shadow:0 30px 50px -38px rgba(13,27,42,.35);
  transform:translateZ(calc(var(--z)*1px));
  padding:16px;display:flex;flex-direction:column;gap:10px;justify-content:flex-end;
  transform-style:preserve-3d;
}
.l-serving{--z:0}
.l-pillars{--z:126}
.l-control{--z:252}
.l-interfaces{--z:378;background:rgba(255,255,255,.6);border-style:dashed}
html.js .arch-layer{opacity:0;transform:translateZ(calc((var(--z) - 60)*1px));transition:transform .8s cubic-bezier(.22,.8,.3,1),opacity .8s ease}
html.js .l-serving{transition-delay:.05s}
html.js .l-pillars{transition-delay:.2s}
html.js .l-control{transition-delay:.35s}
html.js .l-interfaces{transition-delay:.5s}
html.js .arch-scene.is-in .arch-layer{opacity:1;transform:translateZ(calc(var(--z)*1px))}
.arch-firewall{
  position:absolute;inset:-30px -30px -34px -30px;border:1.6px dashed var(--line-strong);
  border-radius:16px;transform:translateZ(-14px);
}
.fw-tag{position:absolute;bottom:-30px;left:0;font-size:10px;letter-spacing:.16em;color:var(--ink-2);white-space:nowrap}
.ltag{
  position:absolute;left:-14px;top:50%;
  transform:rotateZ(calc(var(--rz,-40)*-1deg)) rotateX(calc(var(--rx,57)*-1deg));
  transform-origin:left center;
  font-size:10.5px;letter-spacing:.16em;color:var(--ink);white-space:nowrap;
  translate:-100% -50%;
  text-align:right;
}
.ltag i{display:block;font-style:normal;color:var(--ink-2);font-size:9px;letter-spacing:.12em;margin-top:4px}
.cellrow{display:flex;gap:10px;transform-style:preserve-3d}
.cell{
  flex:1;background:#fff;border:1px solid var(--line-mid);border-radius:8px;
  padding:8px 10px;font-size:11px;letter-spacing:.08em;color:var(--ink);
  white-space:nowrap;
  transform:rotateZ(calc(var(--rz,-40)*-1deg)) rotateX(calc(var(--rx,57)*-1deg));
  transform-origin:50% 100%;
  box-shadow:0 1px 0 var(--line);
}
.cell i{display:block;font-style:normal;font-size:9px;color:var(--ink-2);margin-top:3px;letter-spacing:.12em}
.cell-v{border-color:var(--verify);background:var(--verify-wash)}
.cell-v i{color:var(--verify-ink)}
.cell-store{flex:none;width:100%;background:rgba(13,27,42,.035);text-align:center;color:var(--ink-2);transform:none;box-shadow:none;font-size:10px}
.cell-plug{border-style:dashed;background:transparent}
.cell-dim{border-color:var(--line-mid);background:#fff;display:block}
.arch-cloud{position:absolute;left:calc(100% + 118px);top:30%;width:180px;transform:translateZ(252px);transform-style:preserve-3d}
.arch-egress{position:absolute;left:calc(100% + 2px);top:44%;width:116px;border-top:1.6px dashed var(--line-strong);transform:translateZ(252px);transform-style:preserve-3d}
.gate-dot{position:absolute;left:50%;top:-6px;width:11px;height:11px;border-radius:3px;background:var(--verify);translate:-50%}
.egress-tag{
  position:absolute;left:50%;top:8px;translate:-50%;
  font-size:9px;letter-spacing:.12em;color:var(--ink-2);white-space:nowrap;
  transform:rotateZ(calc(var(--rz,-40)*-1deg)) rotateX(calc(var(--rx,57)*-1deg));
  transform-origin:50% 0;
}
.arch-legend{display:flex;flex-wrap:wrap;gap:16px 28px;font-size:.72rem;line-height:1.65;color:var(--ink-2);letter-spacing:.02em}
.arch-legend li{border-top:1px solid var(--line);padding-top:14px;position:relative;flex:1 1 200px}
.arch-legend b{color:var(--ink);font-weight:500;display:block;letter-spacing:.06em}
.d2-block,.d4-block{margin-top:clamp(56px,7vw,92px)}
.d2-block .h3,.d4-block .h3{margin-bottom:20px}
.d4-block .body-s{margin-bottom:20px}

/* legibility floor for the three big diagrams (rendered ≥760px wide) */
.d2 .dl,.d4 .dl{font-size:11.5px}
.trace-svg .dl{font-size:12.5px}
.d2 .dl-sub{font-size:10px}
.d4 .dl-sub{font-size:9.5px}
.trace-svg .dl-sub{font-size:11px}
.d2 .dl-dim,.d4 .dl-dim,.d2 .dl-step,.d4 .dl-v,.d4 .dl-h{font-size:11px}

/* ---------- Under the hood ---------- */
.stackrow{margin-top:clamp(56px,7vw,92px);border-top:1px solid var(--line);padding-top:36px}
.stackrow-lead{max-width:62ch;color:var(--ink-2);font-size:1rem}
.stackrow-lead b{color:var(--ink)}
.stack-list{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px 28px;margin-top:28px;
  font-size:.72rem;line-height:1.55;color:var(--ink-2);letter-spacing:.03em;
}
.stack-list li{border-left:1px solid var(--line);padding-left:14px}
.stack-list b{display:block;color:var(--verify-ink);font-weight:500;letter-spacing:.14em;font-size:.66rem;margin-bottom:4px}

/* ---------- Verification trace ---------- */
.trace-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 22px 18px;box-shadow:0 24px 60px -44px rgba(13,27,42,.3);
}
.trace-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:6px}
.trace-title{display:inline-flex;align-items:center;gap:9px;font-size:.7rem;letter-spacing:.18em;color:var(--ink-2)}
.pulse-v{background:var(--verify)}
.trace-chips{display:flex;gap:8px}
.chip{
  font:500 .7rem/1 var(--f-mono);letter-spacing:.05em;color:var(--ink-2);
  background:transparent;border:1px solid var(--line);border-radius:999px;
  padding:7px 13px;cursor:pointer;transition:color .15s,border-color .15s,background .15s;
}
.chip:hover{border-color:var(--line-strong);color:var(--ink)}
.chip.is-on{border-color:var(--verify-ink);color:var(--verify-ink);background:var(--verify-wash)}
.trace-svg{width:100%;height:auto}
.trace-svg.dv-desktop{min-width:720px}
.t-rail{fill:none;stroke:rgba(13,27,42,.16);stroke-width:1.5}
.t-live{fill:none;stroke:var(--verify);stroke-width:2.25}
.t-live.hold{stroke:var(--hold)}
.t-node rect{fill:var(--surface);stroke:var(--line-mid);stroke-width:1.3;transition:opacity .4s}
.t-node .dl{transition:opacity .4s}
.t-node-clear rect{stroke:var(--verify);fill:var(--verify-wash)}
.t-node-hold rect{stroke:var(--hold);fill:var(--hold-fill)}
.t-node-rec rect{stroke:var(--line-strong);fill:rgba(13,27,42,.035)}
.t-gatebars path{stroke:var(--ink);stroke-width:2.6}
.t-tick{fill:none;stroke:var(--verify-ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.t-pause{fill:none;stroke:var(--hold);stroke-width:2;stroke-linecap:round}
.t-person{fill:none;stroke:var(--ink-2);stroke-width:1.4}
.t-lines{fill:none;stroke:var(--ink-2);stroke-width:1.3}
.t-dot{fill:var(--verify);opacity:0}
.t-dot.hold{fill:var(--hold)}
.trace-panel .dim{opacity:.22}
.trace-below{display:flex;gap:32px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:6px;padding-top:14px}
.trace-checks{display:flex;flex-direction:column;gap:6px;font-size:.7rem;color:var(--ink-2);letter-spacing:.04em}
.trace-checks b{color:var(--line-strong);font-weight:400;margin-inline:6px;letter-spacing:.2em}
.trace-checks span{color:var(--verify-ink)}
.trace-checks li.is-hold span{color:var(--hold-ink)}
html.js .trace-checks li{opacity:.35;transition:opacity .3s}
html.js .trace-checks li.on{opacity:1}
html:not(.js) .trace-checks li{opacity:1}
.trace-audit{font-size:.74rem;letter-spacing:.03em;color:var(--ink);display:flex;align-items:center;gap:8px;min-height:1.2em;flex:1;justify-content:flex-end;text-align:right}
.ta-caret{width:7px;height:13px;background:var(--verify);flex:none;animation:caret 1.1s steps(2) infinite}
@keyframes caret{50%{opacity:0}}
.trace-hero{padding-bottom:14px}
html:not(.js) .trace-hero{display:none}
.trace-hero .trace-audit{justify-content:flex-start;text-align:left;border-top:1px solid var(--line);margin-top:6px;padding-top:13px}

/* ---------- Guarantees ---------- */
.guar{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:48px}
.guar li{border-top:1px solid var(--line-mid);padding-top:20px}
.gic{width:24px;height:24px;fill:none;stroke:var(--verify-ink);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;margin-bottom:14px}
.guar h3{font-size:.78rem;letter-spacing:.2em;margin-bottom:8px;font-weight:500}
.guar p{font-size:.95rem;color:var(--ink-2);line-height:1.6}

/* ---------- Proof ---------- */
.founder{border-left:2px solid var(--verify);padding-left:22px;margin-top:40px;max-width:56ch}
.founder p:last-child{font-size:1.02rem;line-height:1.6}

/* ---------- Sectors ---------- */
.sector-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:12px}
.sector-row li{
  font:600 clamp(1.15rem,1.6vw + .6rem,1.6rem)/1.2 var(--f-disp);letter-spacing:-.01em;
  color:var(--ink-2);border-left:1px solid var(--line);padding:6px 0 6px 20px;
  transition:color .25s;
}
.sector-row li:hover{color:var(--ink)}

/* ---------- Dark band (CTA + footer) ---------- */
.dark{background:var(--ink);color:var(--paper)}
.dark .h2{color:#fff}
.dark .body-l{color:rgba(246,249,251,.72)}
#cta{padding-block:clamp(96px,11vw,160px)}
.cta-in{text-align:center;display:flex;flex-direction:column;align-items:center;gap:20px}
.cta-in .cta-row{justify-content:center;margin-top:14px}
.cta-mail{font-size:.82rem;letter-spacing:.06em;color:var(--verify-bright);border-bottom:1px dashed transparent;padding-bottom:2px;transition:border-color .15s}
.cta-mail:hover{border-bottom-color:var(--verify-bright)}

.foot{border-top:1px solid rgba(246,249,251,.14);padding-block:64px 72px}
.foot .brand{color:var(--paper)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.foot-tag{margin-top:16px;font-size:.95rem;color:rgba(246,249,251,.66)}
.foot-col h3{font-size:.66rem;letter-spacing:.2em;color:rgba(246,249,251,.5);margin-bottom:16px;font-weight:500}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col a{font-size:.92rem;color:rgba(246,249,251,.72);transition:color .15s}
.foot-col a:hover{color:#fff}
.foot-base{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(246,249,251,.12);
  font-size:.7rem;letter-spacing:.05em;color:rgba(246,249,251,.55);
}
.foot-verify .tick{color:var(--verify-bright);margin-right:6px}

/* ---------- Session ledger + palette toggle ---------- */
.ledger{
  position:fixed;left:16px;bottom:16px;z-index:90;
  display:flex;align-items:center;gap:9px;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line);border-radius:999px;padding:8px 8px 8px 14px;
  font-size:.66rem;letter-spacing:.08em;color:var(--ink-2);
}
.ledger[hidden]{display:none}
.ledger-x{background:none;border:0;color:var(--ink-2);font-size:1rem;line-height:1;cursor:pointer;padding:2px 7px;border-radius:50%}
.ledger-x:hover{color:var(--ink)}
.palette-btn{
  position:fixed;right:16px;bottom:16px;z-index:90;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line);border-radius:999px;padding:9px 15px;
  font-size:.66rem;letter-spacing:.12em;color:var(--ink-2);cursor:pointer;
  transition:color .15s,border-color .15s;
}
.palette-btn:hover{color:var(--verify-ink);border-color:var(--verify-ink)}

/* ---------- Reveal ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .65s ease var(--d,0s),transform .65s ease var(--d,0s)}
html.js [data-reveal].in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1060px){
  .stack-list{grid-template-columns:repeat(2,1fr)}
}
/* compact 3D architecture below 640px — same animation, portrait geometry */
@media (max-width:640px){
  .arch-scene{--sw:460px;--sh:480px}
  .arch-plate{width:340px;height:230px;margin:180px 0 0 64px}
  .l-serving{--z:0}
  .l-pillars{--z:104}
  .l-control{--z:208}
  .l-interfaces{--z:312}
  .arch-layer{padding:10px;gap:6px}
  .cellrow{gap:6px}
  .cell{font-size:10px;padding:6px 8px;letter-spacing:.06em}
  .cell i{font-size:8px}
  .cell-store{font-size:8.5px}
  /* at phone scale the on-plane layer names fight the chips — the legend
     right below the plate carries them in the same top-to-bottom order */
  .ltag{display:none}
  .arch-cloud{left:60%;top:-126px;width:150px;transform:translateZ(312px)}
  .arch-cloud .cell{font-size:10px}
  .arch-egress{left:66%;top:-90px;width:0;height:86px;border-top:0;border-left:1.6px dashed var(--line-strong);transform:translateZ(312px)}
  .gate-dot{left:-6px;top:50%;translate:0 -50%}
  .egress-tag{left:12px;top:50%;translate:0 -50%;transform-origin:0 50%}
  .arch-firewall{inset:-18px -18px -24px}
  .fw-tag{bottom:-22px;font-size:8.5px}
}
/* flat architecture in print — no 3D transforms on paper */
@media print{
  .arch-scene{width:100%;height:auto}
  .arch-stage{width:100%;height:auto;transform:none;perspective:none}
  .arch-plate{
    width:100%;height:auto;margin:16px 0 0;transform:none;
    display:flex;flex-direction:column;gap:12px;
    border:1.6px dashed var(--line-strong);border-radius:14px;padding:16px;
  }
  .arch-layer{
    position:static;opacity:1 !important;transform:none !important;
    box-shadow:none;padding:12px;transition:none;
  }
  .arch-layer,.cellrow,.cell,.arch-cloud,.arch-egress{transform:none !important;transform-style:flat}
  .cell{white-space:normal;box-shadow:none}
  .ltag{
    position:static;transform:none !important;translate:none;
    display:block;text-align:left;margin-bottom:10px;
  }
  .ltag i{display:inline;margin-left:8px}
  .l-interfaces{order:1}.l-control{order:2}.l-pillars{order:3}.l-serving{order:4}
  .arch-egress{position:static;order:5;width:100%;border:0;height:auto;margin-top:2px}
  .gate-dot{position:static;display:inline-block;translate:none;vertical-align:middle;margin-right:8px}
  .egress-tag{position:static;translate:none;display:inline}
  .arch-cloud{position:static;order:6;width:100%}
  .arch-cloud .cell{display:block}
  .arch-firewall{position:static;order:7;border:0;transform:none;inset:auto;margin-top:4px}
  .fw-tag{position:static;white-space:normal}
  .cellrow{flex-wrap:wrap}
}
@media (max-width:920px){
  .grid3{grid-template-columns:1fr;max-width:560px}
  .guar{grid-template-columns:repeat(2,1fr)}
  .sector-row{grid-template-columns:repeat(2,1fr);gap:18px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1/-1}
  .ledger{display:none}
}
@media (max-width:860px){
  html.js .nav-links{
    position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:flex-start;
    gap:4px;background:var(--surface);border-bottom:1px solid var(--line);
    padding:12px clamp(20px,4vw,40px) 20px;display:none;
  }
  html.js .nav.open .nav-links{display:flex}
  html.js .nav-links a{font-size:1.05rem;padding:10px 0;display:block;width:100%}
  .nav-cta{display:none}
  .nav-cta-mobile{display:block}
  html.js .nav-cta-mobile{margin-top:10px}
  .nav-links .nav-cta-mobile a{display:inline-flex;width:auto;color:#fff;font-size:.95rem;padding:11px 18px}
  html.js .nav-toggle{display:block;margin-left:auto}
  .nav nav{margin-left:0;position:static}
  /* no-JS fallback: inline wrapped nav instead of an inert hamburger */
  html:not(.js) .nav-in{height:auto;flex-wrap:wrap;gap:10px;padding-block:12px}
  html:not(.js) .nav-links{flex-wrap:wrap;gap:6px 18px;width:100%}
}
@media (max-width:560px){
  .guar{grid-template-columns:1fr;gap:22px}
  .trace-below{gap:14px}
  .trace-audit{justify-content:flex-start;text-align:left}
  .cell{font-size:9px}
}

/* ---------- Pause control (WCAG 2.2.2) ---------- */
html[data-anim-paused] *{animation-play-state:paused !important}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  html.js [data-reveal]{opacity:1;transform:none}
  html.js .arch-layer{opacity:1;transform:translateZ(calc(var(--z)*1px))}
  html.js .d2 .d-path-v,html.js .d2 .d-path,
  html.js .d4 .d-path-v,html.js .d4 .d-hold-path,html.js .d4 .d-fail-path{
    stroke-dasharray:none;stroke-dashoffset:0;
  }
  html.js .trace-checks li{opacity:1}
  .ta-caret{display:none}
  .t-dot,.d2-dot{opacity:0 !important}
  .trace-panel .dim{opacity:.62}
}

/* ---------- Print ---------- */
@media print{
  html.js [data-reveal]{opacity:1 !important;transform:none !important;transition:none !important}
  html.js .d2 .d-path-v,html.js .d2 .d-path,
  html.js .d4 .d-path-v,html.js .d4 .d-hold-path,html.js .d4 .d-fail-path{
    stroke-dasharray:none !important;stroke-dashoffset:0 !important;
  }
  .t-live{stroke-dasharray:none !important;stroke-dashoffset:0 !important}
  html.js .trace-checks li{opacity:1}
  .trace-panel .dim{opacity:.62}
  .skip,.ledger,.palette-btn,.nav-toggle,.ta-caret,.t-dot,.d2-dot{display:none !important}
  .nav{position:static}
}