/* ==========================================================================
   Synthetic Insight — shared styles
   Type (Hubtown's faces only): Px Grotesk (text, Optimo — licensed, self-host
         in /fonts when purchased; falls back to Helvetica Neue) + Commit Mono
         (labels/buttons, OFL). Logo: T26 Carbon Bold via Adobe kit.
   Monochrome: no hues anywhere. No Inter.
   ========================================================================== */

:root {
  /* paper / ink (light chapters) */
  --paper: #eef0eb;
  --paper-2: #e3e6df;
  --paper-3: #d8dcd3;
  --ink: #14181a;
  --ink-2: #353d40;
  --muted: #58615f;
  --rule: rgba(20, 24, 26, .14);
  --rule-strong: rgba(20, 24, 26, .32);

  /* void (dark chapters) */
  --void: #0a0b0b;
  --void-2: #121313;
  --void-3: #1a1b1b;
  --on-void: #ecedeb;
  --on-void-muted: #979b98;
  --void-rule: rgba(236,237,235,.12);

  /* signal colours */
  --accent: #14181a;          /* monochrome — former "signal" tokens map to ink/grays */
  --accent-ink: #14181a;
  --accent-soft: #c6c8c5;
  --accent-wash: #dcdfd8;
  --mutation: #8a8f8b;        /* mid gray: mutation marks */
  --mutation-soft: #b5b8b5;
  --viable: #b5b8b5;

  --font-logo: "t26-carbon", "carbon", "Carbon", "Oxanium", "Helvetica Neue", sans-serif;
  --font-sans: "Px Grotesk", "Grotesk Regular", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "Commit Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --bracket: #9a9e9b;

  --gutter: clamp(16px, 3.2vw, 40px);
  --maxw: 1480px;
  --bar-h: 44px;

  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-in-out: cubic-bezier(.77, 0, .175, 1);
  --t-fast: .18s;
  --t-med: .45s;
  --t-slow: .9s;

  --z-canvas: 1;
  --z-content: 10;
  --z-nav: 40;
  --z-bar: 40;
  --z-menu: 60;
  --z-trail: 30;
  --z-loader: 100;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body.is-loading { overflow: hidden; }
body.theme-void { background: var(--void); color: var(--on-void); }
img, canvas, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent); color: #fff; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.theme-void :focus-visible, .void :focus-visible { outline-color: var(--accent-soft); }

.skip {
  position: fixed; left: 12px; top: 12px; z-index: 200;
  background: var(--ink); color: var(--paper); padding: 10px 14px;
  font: 500 12px/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase;
  transform: translateY(-160%); transition: transform var(--t-fast);
}
.skip:focus { transform: none; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- layout helpers ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.section { position: relative; padding: clamp(96px, 14vw, 200px) 0; }
.section--tight { padding: clamp(64px, 9vw, 120px) 0; }
.void { background: var(--void); color: var(--on-void); }
.paper-2 { background: var(--paper-2); }
.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.void .rule, .theme-void .rule { border-top-color: var(--void-rule); }

.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gutter); }
@media (max-width: 860px) {
  .grid-12 { grid-template-columns: 1fr; row-gap: 40px; }
  .grid-12 > * { grid-column: 1 / -1 !important; }
}

/* ---------- type ---------- */
.label {
  font: 500 11px/1.4 var(--font-mono);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}
.void .label, .theme-void .label { color: var(--on-void-muted); }
.label b { color: var(--ink); font-weight: 500; }
.void .label b, .theme-void .label b { color: var(--on-void); }
.label--accent { color: var(--accent-ink); }
.void .label--accent, .theme-void .label--accent { color: var(--accent-soft); }

.display {
  font-family: var(--font-sans);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .86;
  margin: 0;
}
.h1 { font-size: clamp(48px, 8.4vw, 136px); font-weight: 400; letter-spacing: -.05em; line-height: .92; margin: 0; }
.h2 { font-size: clamp(38px, 5.6vw, 88px); font-weight: 400; letter-spacing: -.045em; line-height: .96; margin: 0; }
.h3 { font-size: clamp(26px, 2.8vw, 40px); font-weight: 400; letter-spacing: -.03em; line-height: 1.06; margin: 0; }
.h4 { font-size: 20px; font-weight: 500; letter-spacing: -.01em; line-height: 1.25; margin: 0; }
.lede { font-size: clamp(19px, 1.7vw, 24px); line-height: 1.42; letter-spacing: -.012em; color: var(--ink-2); max-width: 34em; }
.void .lede, .theme-void .lede { color: #c6c8c5; }
.body { color: var(--ink-2); max-width: 38em; }
.void .body, .theme-void .body { color: #b5b8b5; }
.muted { color: var(--muted); }
.void .muted, .theme-void .muted { color: var(--on-void-muted); }
em.s, .serif {
  font-family: var(--font-sans);
  font-style: normal;
  font-weight: 300;
}
em.s { color: var(--muted); }
.void em.s, .theme-void em.s { color: var(--on-void-muted); }
em.s--mut, em.s--mut { font-style: normal; font-weight: 300; color: var(--muted); }
.void em.s--mut, .theme-void em.s--mut { color: var(--on-void-muted); }
.num { font-variant-numeric: tabular-nums; }

/* ---------- logo  [SI] → [SYNTHETIC INSIGHT] ---------- */
.logo {
  display: inline-flex; align-items: center;
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 19px;
  line-height: 1;
  letter-spacing: .04em;
  text-transform: uppercase;
  text-decoration: none;
  color: inherit;
  white-space: nowrap;
  min-height: 44px;
  cursor: pointer;
}
.logo .br { display: inline-block; transition: transform var(--t-med) var(--ease-out); }
.logo .br:first-child { margin-right: .08em; }
.logo .br:last-child { margin-left: .08em; }
.logo .w { display: inline-flex; }
.logo .w + .w { margin-left: 0; transition: margin-left var(--t-med) var(--ease-out); }
.logo .x {
  display: inline-grid;
  grid-template-columns: 0fr;
  transition: grid-template-columns .6s var(--ease-out);
}
.logo .x > span {
  overflow: hidden;
  display: inline-flex;
}
.logo .x i {
  font-style: normal;
  display: inline-block;
  opacity: 0;
  transform: translateY(.5em);
  transition: opacity .3s, transform .5s var(--ease-out);
}
.logo:hover .x, .logo:focus-visible .x, .logo.is-open .x { grid-template-columns: 1fr; }
.logo:hover .w + .w, .logo:focus-visible .w + .w, .logo.is-open .w + .w { margin-left: .42em; }
.logo:hover .x i, .logo:focus-visible .x i, .logo.is-open .x i { opacity: 1; transform: none; }
.logo:hover .x i, .logo:focus-visible .x i, .logo.is-open .x i { transition-delay: calc(var(--i) * 22ms + 60ms); }
.logo .accent-bar { color: var(--bracket); }

/* ---------- buttons (hubtown-style mono, text roll) ---------- */
.btn {
  --bh: 44px;
  position: relative;
  display: inline-flex; align-items: center; gap: 10px;
  height: var(--bh);
  padding: 0 18px 0 14px;
  font: 500 11.5px/1 var(--font-mono);
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition: border-color var(--t-fast), background-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
  touch-action: manipulation;
}
.btn::before { /* corner ticks */
  content: ""; position: absolute; inset: 3px; pointer-events: none;
  background:
    linear-gradient(currentColor, currentColor) left top / 5px 1px no-repeat,
    linear-gradient(currentColor, currentColor) left top / 1px 5px no-repeat,
    linear-gradient(currentColor, currentColor) right bottom / 5px 1px no-repeat,
    linear-gradient(currentColor, currentColor) right bottom / 1px 5px no-repeat;
  opacity: .5;
}
.btn .chev { width: 9px; height: 9px; flex: none; transition: transform var(--t-med) var(--ease-out); }
.btn .roll { position: relative; display: inline-block; overflow: hidden; height: 1.2em; line-height: 1.2em; }
.btn .roll > span { display: block; transition: transform .5s var(--ease-out); }
.btn .roll > span + span { position: absolute; left: 0; top: 100%; }
.btn:hover .roll > span, .btn:focus-visible .roll > span { transform: translateY(-100%); }
.btn:hover .chev, .btn:focus-visible .chev { transform: translateX(3px); }
.btn:hover { border-color: var(--ink); }
.btn:active { transform: scale(.98); }
.btn--solid { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--solid:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--accent:hover { background: var(--ink); border-color: var(--ink); }
.void .btn, .theme-void .btn, .nav--void .btn { color: var(--on-void); border-color: rgba(236,237,235,.28); }
.void .btn:hover, .theme-void .btn:hover, .nav--void .btn:hover { border-color: var(--on-void); }
.void .btn--solid, .theme-void .btn--solid, .nav--void .btn--solid { background: #e4e6e2; color: var(--void); border-color: #e4e6e2; }
.void .btn--solid:hover, .theme-void .btn--solid:hover, .nav--void .btn--solid:hover { background: #fff; border-color: #fff; color: var(--void); }
.btn--mut { background: var(--mutation); border-color: var(--mutation); color: #0b0b0b; }
.btn--mut:hover { background: #fff; border-color: #fff; color: #0b0b0b; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn--sm { --bh: 36px; padding: 0 12px 0 10px; font-size: 10.5px; }

.circle-btn {
  width: 56px; height: 56px; border-radius: 50%;
  display: inline-grid; place-items: center;
  border: 1px solid var(--rule-strong);
  background: transparent; cursor: pointer; color: inherit;
  transition: background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-med) var(--ease-out);
}
.circle-btn svg { width: 18px; height: 18px; transition: transform var(--t-med) var(--ease-out); }
.circle-btn:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.circle-btn:hover svg { transform: translateY(3px); }

.link-u {
  text-decoration: none;
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size var(--t-med) var(--ease-out);
}
.link-u:hover, .link-u:focus-visible { background-size: 100% 1px; }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: var(--z-nav);
  /* fixed three-column grid: the logo can expand without moving the links */
  display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center;
  gap: 24px;
  height: 68px;
  padding: 0 var(--gutter);
  transition: background-color var(--t-med), color var(--t-med), transform var(--t-med) var(--ease-out), box-shadow var(--t-med);
}
.nav.is-scrolled { background: rgba(238, 240, 235, .82); backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); box-shadow: 0 1px 0 var(--rule); }
.nav--void { color: var(--on-void); }
.nav--void.is-scrolled { background: rgba(10,11,11,.78); box-shadow: 0 1px 0 var(--void-rule); }
.nav.is-hidden { transform: translateY(-100%); }
.nav__links { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 30px); list-style: none; margin: 0; padding: 0; }
.nav__links a {
  display: inline-flex; align-items: center; min-height: 44px;
  font: 500 11.5px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase;
  text-decoration: none; opacity: .72; transition: opacity var(--t-fast);
}
.nav__links a:hover, .nav__links a:focus-visible, .nav__links a[aria-current="page"] { opacity: 1; }
.nav__links a[aria-current="page"]::before { content: ""; width: 5px; height: 5px; background: currentColor; margin-right: 8px; }
.nav > .logo { justify-self: start; position: relative; z-index: 1; }
.nav__right { display: flex; align-items: center; gap: 10px; justify-self: end; grid-column: 3; }
.nav__menu { display: none; }
@media (max-width: 1020px) {
  .nav__links { display: none; }
  .nav__menu { display: inline-flex; }
  .nav__cta { display: none; }
}

/* mobile menu sheet */
.menu {
  position: fixed; inset: 0; z-index: var(--z-menu);
  background: var(--void); color: var(--on-void);
  display: grid; grid-template-rows: 68px 1fr auto;
  padding: 0 var(--gutter) 28px;
  clip-path: inset(0 0 100% 0);
  visibility: hidden;
  transition: clip-path .6s var(--ease-in-out), visibility 0s .6s;
}
.menu.is-open { clip-path: inset(0 0 0 0); visibility: visible; transition: clip-path .6s var(--ease-in-out), visibility 0s; }
.menu__top { display: flex; align-items: center; justify-content: space-between; }
.menu__list { list-style: none; margin: 0; padding: 24px 0; align-self: center; }
.menu__list li { border-top: 1px solid var(--void-rule); }
.menu__list li:last-child { border-bottom: 1px solid var(--void-rule); }
.menu__list a {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 16px 0; text-decoration: none;
  font-size: clamp(34px, 9vw, 64px); letter-spacing: -.045em; line-height: 1;
}
.menu__list a span { font: 500 11px/1 var(--font-mono); letter-spacing: .14em; color: var(--on-void-muted); }

/* ---------- bottom chapter bar (shape-of-intelligence) ---------- */
.bar {
  position: fixed; inset: auto 0 0 0; z-index: var(--z-bar);
  height: var(--bar-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 0 var(--gutter);
  font: 500 10.5px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted);
  border-top: 1px solid var(--rule);
  background: rgba(238, 240, 235, .86);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--t-med), color var(--t-med), border-color var(--t-med);
}
.bar.on-void { background: rgba(10,11,11,.82); color: var(--on-void-muted); border-top-color: var(--void-rule); }
.bar__chapters { display: flex; align-items: center; gap: 14px; }
.bar__ticks { display: flex; gap: 3px; }
.bar__ticks i { width: 3px; height: 12px; background: currentColor; opacity: .25; transition: opacity var(--t-fast), background-color var(--t-fast); }
.bar__ticks i.on { opacity: 1; background: var(--accent); }
.bar.on-void .bar__ticks i.on { background: var(--accent-soft); }
.bar__name { color: var(--ink); }
.bar.on-void .bar__name { color: var(--on-void); }
.bar button {
  background: none; border: 0; padding: 0 2px; min-height: 36px; cursor: pointer;
  font: inherit; letter-spacing: inherit; text-transform: inherit; color: inherit;
  display: inline-flex; align-items: center; gap: 8px;
}
.bar button:hover { color: var(--ink); }
.bar.on-void button:hover { color: var(--on-void); }
.bar .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 3px rgba(151,155,152,.25); }
.motion-off .bar .dot { background: var(--muted); box-shadow: none; }
.bar, .bar * { white-space: nowrap; }
@media (max-width: 1100px) { .bar__status { display: none; } }
@media (max-width: 640px) { .bar__name { display: none; } }

/* ---------- preloader (hubtown-style, light) ---------- */
.loader {
  position: fixed; inset: 0; z-index: var(--z-loader);
  background: var(--paper); color: var(--ink);
  display: grid; place-items: center;
  transition: clip-path 1s var(--ease-in-out), visibility 0s 1s;
  clip-path: inset(0 0 0 0);
}
.loader.is-done { clip-path: inset(0 0 100% 0); visibility: hidden; }
.loader__inner { position: relative; width: min(520px, 84vw); }
.loader__pct { display: flex; justify-content: flex-end; margin-bottom: 12px; font: 500 11px/1 var(--font-mono); letter-spacing: .14em; color: var(--muted); }
.loader__cells { display: grid; grid-template-columns: repeat(24, 1fr); gap: 6px; }
.loader__cells i { aspect-ratio: 1; background: rgba(20,24,26,.1); transition: background-color .2s; }
.loader__cells i.on { background: var(--ink); }
.loader__cells i.mut { background: var(--bracket); }
.loader__row { display: flex; justify-content: space-between; margin-top: 14px; font: 500 10.5px/1.5 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.loader__stage { min-height: 1.5em; }
.loader__ready {
  position: absolute; inset: -60px 0 auto 0;
  display: grid; justify-items: center; gap: 22px; text-align: center;
  opacity: 0; pointer-events: none; transform: translateY(12px);
  transition: opacity .6s, transform .8s var(--ease-out);
}
.loader.is-ready .loader__ready { opacity: 1; pointer-events: auto; transform: none; }
.loader.is-ready .loader__bar { opacity: 0; transition: opacity .4s; }
.loader__ready .logo { font-size: clamp(26px, 4.6vw, 46px); }
.loader__ready .label { line-height: 1.8; }

/* ---------- reveals ---------- */
.rv { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease-out), transform 1.1s var(--ease-out); transition-delay: var(--d, 0s); }
.rv.in { opacity: 1; transform: none; }
.rv-mask { display: block; overflow: hidden; padding-bottom: .06em; margin-bottom: -.06em; }
.rv-mask > span { display: block; transform: translateY(105%); transition: transform 1.2s var(--ease-out); transition-delay: var(--d, 0s); }
.rv-mask.in > span, .in .rv-mask > span { transform: none; }
.motion-off .rv, .motion-off .rv-mask > span { opacity: 1; transform: none; transition: none; }
@media (prefers-reduced-motion: reduce) {
  .rv, .rv-mask > span { opacity: 1; transform: none; transition: none; }
}

/* scroll-scrubbed word reveal */
.scrub { font-size: clamp(34px, 5.4vw, 84px); letter-spacing: -.045em; line-height: 1.02; margin: 0; max-width: 15em; }
.scrub .w { color: var(--paper-3); transition: color .35s; }
.scrub .w.on { color: var(--ink); }
.scrub .w.on.acc { color: var(--muted); font-weight: 300; }
.void .scrub .w { color: #262828; }
.void .scrub .w.on { color: var(--on-void); }
.void .scrub .w.on.acc { color: var(--on-void-muted); }

/* ---------- hero (shape-of-intelligence) ---------- */
.hero {
  position: relative; min-height: 100vh; min-height: 100dvh;
  padding: 92px var(--gutter) calc(var(--bar-h) + 22px);
  display: grid; grid-template-rows: auto 1fr auto; gap: 18px;
  overflow: hidden;
}
.hero__top { display: flex; justify-content: space-between; gap: 24px; font-size: 13.5px; line-height: 1.45; }
.hero__top p { margin: 0; max-width: 22em; }
.hero__top p:last-child { text-align: right; }
.hero__title { position: relative; align-self: center; z-index: 2; pointer-events: none; }
.hero__title .display {
  font-family: var(--font-logo); font-weight: 700; text-transform: uppercase;
  font-size: clamp(44px, 8.4vw, 148px); letter-spacing: .01em; line-height: .92;
}
.hero__title .l2 { padding-left: 8vw; }
.hero__title sup { font: 500 clamp(11px, 1vw, 14px)/1 var(--font-mono); letter-spacing: .14em; vertical-align: top; margin-left: .8em; position: relative; top: 1.6em; color: var(--muted); }
.hero__canvas { position: absolute; inset: 0; z-index: 1; } /* behind the headline, dala-style */
.hero__canvas canvas { width: 100%; height: 100%; }
.hero__bottom { position: relative; z-index: 4; display: grid; grid-template-columns: 1.2fr minmax(280px, 420px) minmax(240px, .8fr); align-items: end; gap: 24px; }
.hero__bottom > p { margin: 0; font-size: 13.5px; max-width: 20em; color: var(--ink-2); }
.hero__actions { display: flex; justify-content: flex-end; align-items: center; gap: 12px; }
.btn { white-space: nowrap; flex-shrink: 0; }
@media (max-width: 860px) {
  .hero__bottom { grid-template-columns: 1fr; }
  .hero__actions { justify-content: flex-start; }
  .hero__title .l2 { padding-left: 0; }
  .hero__top p:last-child { display: none; }
  .hero__bottom > p { max-width: none; padding: 12px 14px; background: rgba(10,11,11,.6); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
}

/* dark hero (the glow needs black, as on Quantum Stretch) */
.hero.void { background: radial-gradient(60% 70% at 62% 46%, #151717 0%, var(--void) 70%); }
.hero.void .hero__bottom > p { color: #b5b8b5; }
.hero.void .hero__title sup { color: var(--on-void-muted); }
.hero.void .circle-btn { border-color: rgba(236,237,235,.28); }
.hero.void .circle-btn:hover { background: var(--on-void); color: var(--void); border-color: var(--on-void); }

/* hero specimen: mutate → select */
.specimen { border-top: 1px solid var(--rule); padding: 12px 14px 4px; background: rgba(238,240,235,.78); backdrop-filter: blur(10px) saturate(1.1); -webkit-backdrop-filter: blur(10px) saturate(1.1); }
.specimen__head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.specimen__state { display: inline-flex; align-items: center; gap: 8px; }
.specimen__state::before { content: ""; width: 6px; height: 6px; background: var(--ink); transition: transform .3s var(--ease-out), background-color .3s; }
.specimen.is-mutating .specimen__state::before { background: var(--bracket); transform: rotate(45deg) scale(1.3); }
.specimen__stats { display: grid; grid-template-columns: repeat(3, 1fr); margin: 14px 0 0; }
.specimen__stats div { padding: 0 12px; border-left: 1px solid var(--rule); }
.specimen__stats div:first-child { padding-left: 0; border-left: 0; }
.specimen__stats dt { font: 500 10px/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.specimen__stats dd { margin: 4px 0 0; font: 400 20px/1.1 var(--font-mono); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.specimen__fit { display: grid; grid-template-columns: repeat(24, 1fr); gap: 3px; margin: 14px 0; }
.specimen__fit i { height: 8px; background: rgba(20,24,26,.1); transition: background-color .35s; }
.specimen__fit i.on { background: var(--ink); }
.specimen__fit i.new { background: var(--bracket); }
.specimen__actions { display: flex; gap: 8px; flex-wrap: wrap; }
.specimen__log { margin: 10px 0 0; min-height: 2.8em; font: 400 11px/1.4 var(--font-mono); letter-spacing: .04em; color: var(--muted); }
.void .specimen { background: rgba(10,11,11,.55); border-top-color: var(--void-rule); }
.void .specimen__stats div { border-left-color: var(--void-rule); }
.void .specimen__stats dt, .void .specimen__log { color: var(--on-void-muted); }
.void .specimen__state::before { background: var(--on-void); }
.void .specimen__fit i { background: rgba(236,237,235,.12); }
.void .specimen__fit i.on { background: var(--on-void); }
.void .specimen__fit i.new { background: #8a8f8b; }

/* ---------- index / chapter heads ---------- */
.chap { display: flex; gap: 18px; align-items: baseline; margin-bottom: clamp(40px, 6vw, 80px); }
.chap .label:first-child { min-width: 3.4em; }

/* ---------- thesis twin columns ---------- */
.thesis { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--rule); }
.thesis > article { padding: 36px 0 0; }
.thesis > article + article { border-left: 1px solid var(--rule); padding-left: var(--gutter); }
.thesis > article:first-child { padding-right: var(--gutter); }
.thesis figure { margin: 30px 0 28px; aspect-ratio: 16 / 9; border: 1px solid var(--rule); position: relative; background: var(--paper); }
.thesis figure svg { width: 100%; height: 100%; }
.thesis ul { list-style: none; margin: 24px 0 0; padding: 0; }
.thesis li { display: flex; gap: 16px; padding: 12px 0; border-top: 1px solid var(--rule); font-size: 15px; }
.thesis li .label { min-width: 2.6em; padding-top: 3px; }
@media (max-width: 860px) {
  .thesis { grid-template-columns: 1fr; }
  .thesis > article + article { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); margin-top: 48px; }
  .thesis > article:first-child { padding-right: 0; }
}

/* ---------- mecha-style sticky index layout ---------- */
.split { display: grid; grid-template-columns: minmax(260px, 4fr) 8fr; gap: var(--gutter); align-items: start; }
.split__side { position: sticky; top: 96px; }
.split__index { list-style: none; margin: 28px 0 0; padding: 0; border-bottom: 1px solid var(--rule); }
.split__index li { border-top: 1px solid var(--rule); }
.split__index a {
  display: flex; gap: 18px; align-items: center; padding: 11px 0; min-height: 44px;
  font: 500 11px/1 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; text-decoration: none; color: var(--muted);
  transition: color var(--t-fast), padding var(--t-med) var(--ease-out);
}
.split__index a.on { color: var(--ink); padding-left: 10px; }
.split__index a.on::after { content: ""; margin-left: auto; width: 6px; height: 6px; background: var(--accent); }
.void .split__index, .void .split__index li { border-color: var(--void-rule); }
.void .split__index a { color: var(--on-void-muted); }
.void .split__index a.on { color: var(--on-void); }
.split__main > .step { padding: 0 0 clamp(80px, 12vw, 160px); }
.split__main > .step:last-child { padding-bottom: 0; }
.step__big { font-family: var(--font-sans); font-weight: 300; font-size: clamp(32px, 4vw, 62px); line-height: 1.04; letter-spacing: -.035em; margin: 14px 0 28px; max-width: 13em; }
.step__cols { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); border-top: 1px solid var(--rule); padding-top: 22px; }
.void .step__cols { border-color: var(--void-rule); }
.step__cols p { margin: 0; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .split__side { position: static; }
  .step__cols { grid-template-columns: 1fr; }
}

/* ---------- GA lab ---------- */
.lab { border: 1px solid var(--rule); background: var(--paper); margin-top: 26px; }
.lab__head, .lab__foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--rule); }
.lab__foot { border-bottom: 0; border-top: 1px solid var(--rule); }
.lab canvas { width: 100%; height: clamp(240px, 32vw, 380px); }
.lab__stats { display: flex; gap: 22px; flex-wrap: wrap; }
.lab__stats b { font: 500 12px/1 var(--font-mono); color: var(--ink); margin-left: 6px; }
.lab__head, .lab__foot { flex-wrap: wrap; }
.lab__ctrl { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.lab__ctrl input[type="range"] { accent-color: var(--accent); width: clamp(90px, 30vw, 140px); max-width: 100%; }

/* ---------- VI console (quantum-style organism) ---------- */
.console { position: relative; min-height: 100vh; min-height: 100dvh; overflow: hidden; padding: 110px 0 calc(var(--bar-h) + 30px); }
.console__stage { position: absolute; inset: 0; z-index: var(--z-canvas); }
.console__stage canvas { width: 100%; height: 100%; }
.console__grid {
  position: relative; z-index: var(--z-content);
  display: grid; grid-template-columns: minmax(220px, 300px) 1fr minmax(240px, 340px);
  grid-template-rows: auto 1fr auto;
  gap: 24px; min-height: calc(100dvh - 140px - var(--bar-h));
  pointer-events: none;
}
.console__grid > * { pointer-events: auto; }
.console__title { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; }
.console__title .h2 { max-width: 7em; }
.console__title .h2 em.s { display: inline; }
.console__aside { font-size: 13px; max-width: 24em; color: var(--on-void-muted); text-align: right; }
.stages { list-style: none; margin: 0; padding: 0; align-self: end; }
.stages li { display: grid; grid-template-columns: 22px 1fr auto; align-items: center; gap: 8px; padding: 9px 0; border-top: 1px solid var(--void-rule); font: 500 10.5px/1 var(--font-mono); letter-spacing: .13em; text-transform: uppercase; color: #5e625f; transition: color .3s; }
.stages li:last-child { border-bottom: 1px solid var(--void-rule); }
.stages li i { width: 7px; height: 7px; border: 1px solid currentColor; transition: background-color .3s, border-color .3s, box-shadow .3s; }
.stages li.active { color: var(--on-void); }
.stages li.active i { background: var(--mutation); border-color: var(--mutation); box-shadow: 0 0 12px var(--mutation); }
.stages li.done { color: var(--on-void-muted); }
.stages li.done i { background: var(--accent-soft); border-color: var(--accent-soft); }
.stages li span:last-child { color: var(--on-void-muted); font-variant-numeric: tabular-nums; }
.readout { align-self: end; min-height: 160px; }
.readout__tokens { display: flex; flex-wrap: wrap; gap: 5px; margin: 10px 0 0; min-height: 26px; }
.tok { font: 500 11px/1 var(--font-mono); padding: 5px 7px; border: 1px solid var(--void-rule); color: #c8cac7; background: rgba(18,19,19,.6); opacity: 0; transform: translateY(6px); animation: tokIn .5s var(--ease-out) forwards; animation-delay: var(--d, 0s); }
.tok.hot { border-color: rgba(151,155,152,.6); color: #fff; box-shadow: inset 0 0 0 1px rgba(151,155,152,.25); }
@keyframes tokIn { to { opacity: 1; transform: none; } }
.readout__concepts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.concept { display: inline-flex; gap: 8px; align-items: center; font: 500 10.5px/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; padding: 6px 9px; border-radius: 99px; background: rgba(236,237,235,.12); color: #e4e6e2; }
.concept b { color: var(--mutation-soft); font-weight: 500; }

.ask {
  grid-column: 1 / -1; justify-self: center; width: min(760px, 100%);
  display: grid; gap: 12px;
}
.ask__field {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 6px 6px 18px;
  background: rgba(18,19,19,.72);
  border: 1px solid rgba(236,237,235,.18);
  border-radius: 4px;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.ask__field:focus-within { border-color: var(--accent-soft); box-shadow: 0 0 0 4px rgba(236,237,235,.12); }
.ask__field input {
  flex: 1; min-width: 0; background: none; border: 0; outline: none;
  color: var(--on-void); font: 400 17px/1.3 var(--font-sans); padding: 12px 0; letter-spacing: -.01em;
}
.ask__field input::placeholder { color: #707572; }
.ask__chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.chip {
  background: transparent; border: 1px solid var(--void-rule); color: var(--on-void-muted);
  font: 500 10.5px/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase;
  padding: 0 12px; min-height: 32px; border-radius: 99px; cursor: pointer; transition: color var(--t-fast), border-color var(--t-fast);
}
.chip:hover { color: var(--on-void); border-color: rgba(236,237,235,.4); }
.answer {
  grid-column: 3; grid-row: 2 / 3; align-self: end;
  font-size: 14.5px; line-height: 1.6; color: #d6d8d5;
  max-height: 46vh; overflow: auto; scrollbar-width: thin;
  padding-right: 4px;
}
.answer p { margin: 0 0 .8em; }
.answer .cursor { display: inline-block; width: .5em; height: 1em; vertical-align: -2px; background: var(--mutation); animation: blink 1s steps(2) infinite; margin-left: 2px; }
@keyframes blink { 50% { opacity: 0; } }
.answer .src { font: 500 10.5px/1.5 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--on-void-muted); border-top: 1px solid var(--void-rule); padding-top: 10px; margin-top: 12px; }
.answer a { color: var(--accent-soft); }
.console__disclaimer { font: 500 10px/1.5 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: #707572; text-align: center; }
.console__hint { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); z-index: 5; pointer-events: none; font: 500 10.5px/1 var(--font-mono); letter-spacing: .16em; text-transform: uppercase; color: rgba(236,237,235,.55); transition: opacity .6s; }
.console.has-hovered .console__hint { opacity: 0; }
@media (max-width: 1020px) {
  .console__grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .console__stage { position: relative; height: 62vh; margin: -40px 0 -20px; }
  .console { padding-top: 96px; }
  .answer { grid-column: 1; grid-row: auto; max-height: none; }
  .stages { order: 3; }
  .readout { order: 4; min-height: 0; }
  .console__aside { text-align: left; }
  .console__title { flex-direction: column; }
  .console__hint { display: none; }
}
@media (hover: none) { .console__hint { display: none; } }

/* ---------- thought trail (centerlab-style hover images) ---------- */
.trail { position: fixed; inset: 0; pointer-events: none; z-index: var(--z-trail); overflow: hidden; }
.thought {
  position: absolute; left: 0; top: 0;
  width: clamp(120px, 12vw, 190px);
  transform: translate(-50%, -50%) scale(.6);
  opacity: 0;
  transition: opacity .35s, transform .6s var(--ease-out);
  will-change: transform, opacity;
}
.thought.in { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.thought.out { opacity: 0; transform: translate(-50%, -62%) scale(.92); transition: opacity .5s, transform .7s var(--ease-out); }
.thought__img { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #111; }
.thought__img img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.15) brightness(.95); }
.thought__img::after { content: ""; position: absolute; inset: 0; background: rgba(10,11,11,.18); }
.thought__img::before { /* scanlines + detection frame */
  content: ""; position: absolute; inset: 8px; z-index: 2;
  border: 1px solid rgba(255, 255, 255, .55);
  background: repeating-linear-gradient(0deg, rgba(0,0,0,.18) 0 1px, transparent 1px 3px);
}
.thought__tag { display: flex; justify-content: space-between; gap: 8px; margin-top: 5px; font: 500 9.5px/1.2 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--on-void); }
.thought__tag b { color: var(--mutation-soft); font-weight: 500; }
.trail--light .thought__tag { color: var(--ink); }
.trail--light .thought__tag b { color: var(--accent-ink); }
.thought--pinned { position: absolute; }
.thought-layer { position: absolute; inset: 0; pointer-events: none; z-index: 4; }
.thought-layer svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.thought-layer line { stroke: rgba(236,237,235,.45); stroke-width: 1; stroke-dasharray: 3 4; }

/* ---------- truth table (what a VI is / isn't) ---------- */
.truth { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--rule); margin-top: 48px; }
.truth > div { padding: 26px 0; }
.truth > div + div { border-left: 1px solid var(--rule); padding-left: var(--gutter); }
.truth > div:first-child { padding-right: var(--gutter); }
.truth ul { list-style: none; padding: 0; margin: 18px 0 0; }
.truth li { display: grid; grid-template-columns: 26px 1fr; gap: 10px; padding: 14px 0; border-top: 1px solid var(--rule); font-size: 16px; }
.truth svg { width: 16px; height: 16px; margin-top: 3px; }
.truth .yes svg { color: var(--accent); }
.truth .no svg { color: var(--mutation); }
@media (max-width: 760px) {
  .truth { grid-template-columns: 1fr; }
  .truth > div + div { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); }
  .truth > div:first-child { padding-right: 0; }
}

/* ---------- product rows (centerlab list with cursor image) ---------- */
.rows { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid var(--rule); }
.rows li { border-top: 1px solid var(--rule); }
.rows a {
  display: grid; grid-template-columns: 60px 1fr minmax(0, 1.1fr) 56px; align-items: center; gap: var(--gutter);
  padding: clamp(22px, 3vw, 36px) 0; text-decoration: none;
  transition: padding var(--t-med) var(--ease-out), color var(--t-fast);
}
.rows a:hover, .rows a:focus-visible { padding-left: 14px; }
.rows .rows__name { font-size: clamp(34px, 5vw, 76px); letter-spacing: -.05em; line-height: .95; }
.rows .rows__name small { display: block; font: 500 10.5px/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-top: 10px; }
.rows p { margin: 0; color: var(--ink-2); font-size: 15px; max-width: 30em; }
.rows .arrow { width: 52px; height: 52px; border: 1px solid var(--rule-strong); border-radius: 50%; display: grid; place-items: center; transition: background-color var(--t-fast), color var(--t-fast), transform var(--t-med) var(--ease-out); }
.rows .arrow svg { width: 16px; height: 16px; }
.rows a:hover .arrow { background: var(--accent); color: #fff; border-color: var(--accent); transform: rotate(-45deg); }
@media (max-width: 760px) {
  .rows a { grid-template-columns: 1fr 52px; }
  .rows a > .label, .rows p { display: none; }
}
.row-peek {
  position: fixed; left: 0; top: 0; z-index: var(--z-trail); pointer-events: none;
  width: 260px; aspect-ratio: 4 / 3; overflow: hidden;
  opacity: 0; transform: translate(-50%, -50%) scale(.8) rotate(-3deg);
  transition: opacity .3s, transform .5s var(--ease-out);
  background: var(--void);
}
.row-peek.on { opacity: 1; transform: translate(-50%, -50%) scale(1) rotate(0); }
.row-peek canvas, .row-peek img { width: 100%; height: 100%; object-fit: cover; }
@media (hover: none) { .row-peek { display: none; } }

/* ---------- principles ---------- */
.principles { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--rule); }
.principles article { padding: 26px 22px 30px 0; }
.principles article + article { border-left: 1px solid var(--rule); padding-left: 22px; }
.principles .h4 { margin: 34px 0 10px; }
.principles p { margin: 0; font-size: 14.5px; color: var(--ink-2); }
@media (max-width: 1020px) { .principles { grid-template-columns: 1fr 1fr; } .principles article:nth-child(3) { border-left: 0; padding-left: 0; } .principles article:nth-child(n+3) { border-top: 1px solid var(--rule); } }
@media (max-width: 560px) { .principles { grid-template-columns: 1fr; } .principles article + article { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); } }
.void .principles, .void .principles article { border-color: var(--void-rule); }
.void .principles p { color: #b5b8b5; }

/* ---------- generic cards / specs ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.cards > * { background: var(--paper); padding: 26px 24px 30px; }
.void .cards { background: var(--void-rule); border-color: var(--void-rule); }
.void .cards > * { background: var(--void); }
.cards .h4 { margin: 40px 0 10px; }
.cards p { margin: 0; font-size: 14.5px; color: var(--ink-2); }
.void .cards p { color: #b5b8b5; }
.cards ul { margin: 14px 0 0; padding: 0; list-style: none; font-size: 14px; }
.cards li { padding: 7px 0; border-top: 1px dashed var(--rule); color: var(--ink-2); }
.void .cards li { border-color: var(--void-rule); color: #b5b8b5; }
@media (max-width: 1020px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }
.cards--2 { grid-template-columns: 1fr 1fr; }
.cards--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1020px) { .cards--4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .cards--2, .cards--4 { grid-template-columns: 1fr; } }

.icon { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 0 22px; margin: 0; font-size: 14.5px; }
.kv dt, .kv dd { padding: 10px 0; border-top: 1px solid var(--rule); margin: 0; }
.kv dt { font: 500 10.5px/1.9 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.void .kv dt, .void .kv dd { border-color: var(--void-rule); }

.note {
  display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start;
  padding: 18px 20px; border: 1px solid var(--rule); background: var(--paper);
  font-size: 14.5px; color: var(--ink-2);
}
.note svg { color: var(--accent); margin-top: 2px; }
.void .note { border-color: var(--void-rule); background: var(--void-2); color: #b5b8b5; }

/* ---------- page hero (sub pages) ---------- */
.phero { position: relative; min-height: 92vh; min-height: 92dvh; padding: 120px var(--gutter) calc(var(--bar-h) + 40px); display: grid; grid-template-rows: auto 1fr auto; gap: 30px; overflow: hidden; }
.phero__meta { display: flex; justify-content: space-between; gap: 24px; }
.phero__title { align-self: end; position: relative; z-index: 2; }
.phero__title .display { font-size: clamp(64px, 12.6vw, 208px); }
.phero__foot { position: relative; z-index: 2; display: grid; grid-template-columns: 1.2fr 1fr; gap: var(--gutter); align-items: end; border-top: 1px solid var(--rule); padding-top: 22px; }
.void .phero__foot, .theme-void .phero__foot { border-color: var(--void-rule); }
.phero__foot .actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
@media (max-width: 860px) { .phero__foot { grid-template-columns: 1fr; } .phero__foot .actions { justify-content: flex-start; } }
.phero__art { position: absolute; inset: 0; z-index: 1; }
.phero__art canvas { width: 100%; height: 100%; }

/* numbered wembi-style sections */
.nsec { border-top: 1px solid var(--rule); padding-top: 18px; display: grid; grid-template-columns: 1fr 3fr; gap: var(--gutter); }
.void .nsec, .theme-void .nsec { border-color: var(--void-rule); }
.nsec__id { display: grid; gap: 6px; align-content: start; }
.nsec__id .n { font: 500 12px/1 var(--font-mono); letter-spacing: .1em; }
@media (max-width: 860px) { .nsec { grid-template-columns: 1fr; } }

/* loop diagram */
.loop-fig { width: 100%; max-width: 560px; margin: 0 auto; }
.loop-fig text { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; fill: currentColor; }
.loop-fig .ring { fill: none; stroke: var(--rule-strong); stroke-width: 1; }
.loop-fig .run { fill: none; stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 60 1200; animation: run 6s linear infinite; }
.void .loop-fig .run { stroke: var(--accent-soft); }
.void .loop-fig .ring { stroke: rgba(236,237,235,.25); }
@keyframes run { to { stroke-dashoffset: -1260; } }
.motion-off .loop-fig .run { animation: none; }
@media (prefers-reduced-motion: reduce) { .loop-fig .run { animation: none; } }
.loop-fig .node { fill: var(--paper); stroke: var(--ink); stroke-width: 1; }
.void .loop-fig .node { fill: var(--void); stroke: var(--on-void); }
.loop-fig .node.hot { fill: var(--accent); stroke: var(--accent); }

/* timeline / phases */
.phases { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--rule); counter-reset: ph; }
.phases li { padding: 20px 20px 26px 0; position: relative; }
.phases li + li { border-left: 1px solid var(--rule); padding-left: 20px; }
.phases li::before { content: ""; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; background: var(--ink); }
.phases li + li::before { left: 20px; }
.phases li.now::before { background: var(--accent); box-shadow: 0 0 0 4px rgba(20,24,26,.18); }
.phases .h4 { margin: 12px 0 8px; }
.phases p { margin: 0; font-size: 14px; color: var(--ink-2); }
.void .phases, .void .phases li { border-color: var(--void-rule); }
.void .phases li::before { background: var(--on-void); }
.void .phases li.now::before { background: var(--mutation); box-shadow: 0 0 0 4px rgba(151,155,152,.2); }
.void .phases p { color: #b5b8b5; }
@media (max-width: 900px) { .phases { grid-template-columns: 1fr 1fr; } .phases li:nth-child(3) { border-left: 0; padding-left: 0; } .phases li:nth-child(3)::before { left: 0; } }
@media (max-width: 560px) { .phases { grid-template-columns: 1fr; } .phases li + li { border-left: 0; padding-left: 0; } .phases li + li::before { left: 0; } }

/* faq */
.faq { border-bottom: 1px solid var(--rule); }
.faq details { border-top: 1px solid var(--rule); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 20px 0; min-height: 44px; font-size: clamp(18px, 1.8vw, 24px); letter-spacing: -.02em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 22px/1 var(--font-mono); transition: transform var(--t-med) var(--ease-out); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > div { padding: 0 0 24px; max-width: 46em; color: var(--ink-2); }
.void .faq, .void .faq details { border-color: var(--void-rule); }
.void .faq details > div { color: #b5b8b5; }

/* forms */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px var(--gutter); }
.field { display: grid; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font: 500 10.5px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.field label .req { color: var(--mutation); }
.field input, .field select, .field textarea {
  font: 400 16px/1.4 var(--font-sans); color: inherit;
  background: transparent; border: 0; border-bottom: 1px solid var(--rule-strong);
  padding: 12px 0; min-height: 46px; border-radius: 0; outline: none;
  transition: border-color var(--t-fast);
}
.field textarea { resize: vertical; min-height: 96px; }
.field input:focus, .field select:focus, .field textarea:focus { border-bottom-color: var(--accent); }
.field .err { font-size: 13px; color: var(--ink); min-height: 1em; }
.field .err:not(:empty)::before { content: "! "; font-family: var(--font-mono); }
.void .field .err { color: var(--on-void); }
.field [aria-invalid="true"] { border-bottom-width: 2px; }
.field [aria-invalid="true"] { border-bottom-color: #14181a; }
.form__status { grid-column: 1 / -1; font-size: 14px; min-height: 1.4em; }
@media (max-width: 640px) { .form { grid-template-columns: 1fr; } }
.void .field input, .void .field select, .void .field textarea { border-bottom-color: rgba(236,237,235,.3); }
.void .field select option { background: var(--void); }

/* footer */
.footer { position: relative; background: var(--void); color: var(--on-void); padding: clamp(80px, 10vw, 140px) 0 calc(var(--bar-h) + 30px); overflow: hidden; }
.footer__cta { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 30px; padding-bottom: clamp(60px, 8vw, 110px); }
.footer__cta .h1 { max-width: 9em; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--gutter); border-top: 1px solid var(--void-rule); padding-top: 26px; font-size: 14px; }
.footer__grid ul { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 4px; }
.footer__grid a { text-decoration: none; color: #c6c8c5; display: inline-flex; min-height: 32px; align-items: center; }
.footer__grid a:hover { color: #fff; }
.footer__mark {
  font-family: var(--font-logo); font-weight: 700; text-transform: uppercase;
  font-size: clamp(90px, 25vw, 420px); line-height: .8; letter-spacing: -.02em;
  margin: clamp(50px, 7vw, 90px) 0 0; color: #151616; white-space: nowrap; user-select: none;
  display: flex; justify-content: space-between;
}
.footer__mark span:nth-child(2) { color: #1d1f1e; }
.footer__legal { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
@media (max-width: 860px) { .footer__cta { grid-template-columns: 1fr; } .footer__grid { grid-template-columns: 1fr 1fr; } }

/* stat strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--rule); }
.stats > div { padding: 22px 20px 0 0; }
.stats > div + div { border-left: 1px solid var(--rule); padding-left: 20px; }
.stats .v { font-size: clamp(40px, 5vw, 76px); letter-spacing: -.05em; line-height: 1; margin: 24px 0 10px; font-variant-numeric: tabular-nums; }
.stats p { margin: 0; font-size: 13.5px; color: var(--ink-2); max-width: 20em; }
.void .stats, .void .stats > div { border-color: var(--void-rule); }
.void .stats p { color: #b5b8b5; }
@media (max-width: 860px) { .stats { grid-template-columns: 1fr 1fr; row-gap: 30px; } .stats > div:nth-child(3) { border-left: 0; padding-left: 0; } }

/* marquee */
.marquee { overflow: hidden; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 16px 0; }
.void .marquee { border-color: var(--void-rule); }
.marquee__track { display: flex; gap: 48px; width: max-content; animation: marq 40s linear infinite; font: 500 11px/1 var(--font-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.marquee__track span::before { content: "■"; margin-right: 12px; color: var(--accent); font-size: 7px; vertical-align: 2px; }
@keyframes marq { to { transform: translateX(-50%); } }
.marquee:hover .marquee__track { animation-play-state: paused; }
.motion-off .marquee__track { animation: none; }
@media (prefers-reduced-motion: reduce) { .marquee__track { animation: none; } }

/* utility spacing */
.mt-s { margin-top: 16px; } .mt-m { margin-top: 32px; } .mt-l { margin-top: 64px; } .mt-xl { margin-top: 110px; }
.mb-m { margin-bottom: 32px; } .mb-l { margin-bottom: 64px; }
.flex { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.between { justify-content: space-between; }