/* ============================================================
   PIPELINE ALPHA — shared design system
   "premium instrument panel from a warm, lived-in future"
   ============================================================ */

/* ---- tokens ---- */
:root{
  --bg:#14141C;
  --bg-2:#101019;
  --surface:#1C1C26;
  --surface-2:#22222E;
  --cream:#F0E9D6;
  --orange:#E0531F;
  --amber:#E8A838;
  --muted:#6E6E7A;

  --hair: rgba(240,233,214,0.13);
  --hair-2: rgba(240,233,214,0.22);
  --hair-3: rgba(240,233,214,0.05);

  --ink: var(--cream);
  --ink-dim: #A9A7A0;

  --maxw: 1240px;
  --gutter: clamp(20px, 4vw, 64px);

  --mono: "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --display: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;

  --r: 3px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- reset ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
::selection{background:var(--orange);color:#fff}

/* ---- starfield canvas ---- */
#starfield{
  position:fixed;inset:0;width:100%;height:100%;
  z-index:0;pointer-events:none;
  background:
    radial-gradient(1200px 800px at 72% -10%, rgba(224,83,31,0.10), transparent 60%),
    radial-gradient(900px 700px at 10% 110%, rgba(232,168,56,0.05), transparent 60%),
    var(--bg);
}
.page{position:relative;z-index:1}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--muted);
  display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{
  content:"";width:6px;height:6px;background:var(--orange);
  border-radius:50%;flex:0 0 auto;
  box-shadow:0 0 0 4px rgba(224,83,31,0.16);
}
.eyebrow.no-dot::before{display:none}

h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.04;letter-spacing:-0.02em;color:var(--cream)}
.h-display{font-size:clamp(40px,6.4vw,86px);line-height:0.98;letter-spacing:-0.03em;text-wrap:balance}
h2{font-size:clamp(28px,3.6vw,46px);text-wrap:balance}
h3{font-size:clamp(20px,2vw,26px);letter-spacing:-0.01em}
.accent-it{font-style:italic;color:var(--amber);font-weight:500}
.orange{color:var(--orange)}

p{text-wrap:pretty}
.lead{font-size:clamp(18px,1.5vw,22px);line-height:1.55;color:var(--ink-dim);max-width:60ch}
.dim{color:var(--ink-dim)}
.measure{max-width:64ch}

/* ============================================================
   LAYOUT
   ============================================================ */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
section{position:relative}
.section{padding-block:clamp(72px,10vw,140px)}
.section-tight{padding-block:clamp(56px,7vw,96px)}
.rule{height:1px;background:var(--hair);border:0}
.rule-strong{height:1px;background:var(--hair-2);border:0}

.kicker-row{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:24px;flex-wrap:wrap;margin-bottom:clamp(28px,4vw,48px);
}
.coord{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--muted);text-transform:uppercase}
/* brand token: keep "Ai" mixed-case even inside uppercased UI */
.ai{text-transform:none;font-style:inherit}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;
  padding:14px 22px;border:1px solid transparent;border-radius:var(--r);
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),transform .2s var(--ease);
  white-space:nowrap;
}
.btn .arr{transition:transform .25s var(--ease)}
.btn:hover .arr{transform:translateX(3px)}
.btn-primary{background:var(--orange);color:#fff;font-weight:700}
.btn-primary:hover{background:#f0611f}
.btn-ghost{border-color:var(--hair-2);color:var(--cream)}
.btn-ghost:hover{border-color:var(--cream);background:rgba(240,233,214,0.04)}
.btn-link{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--cream);display:inline-flex;align-items:center;gap:.55em;
}
.btn-link .arr{transition:transform .25s var(--ease);color:var(--orange)}
.btn-link:hover .arr{transform:translateX(4px)}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}

:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}

/* ============================================================
   PANEL — instrument readout
   ============================================================ */
.panel{
  position:relative;background:var(--surface);
  border:1px solid var(--hair);border-radius:var(--r);
}
.panel-q{background:linear-gradient(180deg, rgba(34,34,46,0.6), rgba(28,28,38,0.6))}
/* corner brackets */
.bracketed::before,.bracketed::after{
  content:"";position:absolute;width:11px;height:11px;opacity:.55;pointer-events:none;
}
.bracketed::before{
  top:-1px;left:-1px;
  border-top:1px solid var(--cream);border-left:1px solid var(--cream);
}
.bracketed::after{
  bottom:-1px;right:-1px;
  border-bottom:1px solid var(--cream);border-right:1px solid var(--cream);
}
.panel-label{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.solid{
  background:rgba(18,18,26,0.82);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  border-bottom-color:var(--hair);
}
.header-inner{
  max-width:var(--maxw);margin-inline:auto;padding:16px var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
/* logo stand-in */
.logo{display:flex;align-items:center;gap:13px}
.logo .mark{width:34px;height:34px;flex:0 0 auto}
.logo .wm{line-height:1}
.logo .wm .top{
  font-family:var(--mono);font-size:8.5px;letter-spacing:.26em;color:var(--muted);
  text-transform:uppercase;display:block;margin-bottom:3px;
}
.logo .wm .name{font-family:var(--display);font-weight:700;font-size:19px;letter-spacing:-0.01em;color:var(--cream)}
.logo .wm .name i{font-style:italic;color:var(--amber);font-weight:500}

.nav{display:flex;align-items:center;gap:4px}
.nav a{
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-dim);padding:9px 11px;border-radius:var(--r);white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav a:hover{color:var(--cream);background:rgba(240,233,214,0.04)}
.nav a.active{color:var(--cream)}
.nav a.active::after{content:"";display:block;height:1px;background:var(--orange);margin-top:5px}
.header-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--hair-2);border-radius:var(--r);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.nav-toggle span{display:block;width:17px;height:1.5px;background:var(--cream);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.nav-toggle.open span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;padding-top:clamp(140px,18vh,210px);padding-bottom:clamp(64px,9vw,120px);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr 0.85fr;gap:clamp(32px,5vw,72px);align-items:center}
.hero h1{margin:22px 0 26px}
.hero-meta{
  display:flex;gap:28px;flex-wrap:wrap;margin-top:36px;padding-top:26px;border-top:1px solid var(--hair);
}
.hero-meta .stat .n{font-family:var(--display);font-weight:700;font-size:26px;color:var(--cream)}
.hero-meta .stat .l{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:2px}

/* atom */
.atom-stage{position:relative;aspect-ratio:1;display:grid;place-items:center}
.atom{width:min(100%,460px);height:auto;overflow:visible}
.atom .ring{fill:none;stroke:var(--cream);stroke-width:1.3;opacity:.5;vector-effect:non-scaling-stroke}
.menu-only{display:none}
.atom .nucleus{fill:var(--orange)}
.atom .nucleus-glow{fill:var(--orange);filter:url(#atomGlow);opacity:.85}
.atom .electron{fill:var(--cream)}
.atom .electron.amber{fill:var(--amber)}
.atom-readout{
  position:absolute;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
}
.atom-readout.tl{top:6%;left:0}
.atom-readout.br{bottom:6%;right:0;text-align:right}

@media (prefers-reduced-motion: no-preference){
  .atom .nucleus-glow{animation:pulse 4.5s ease-in-out infinite}
}
@keyframes pulse{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:.95;transform:scale(1.06)}}
.atom svg{transform-box:view-box}

/* ============================================================
   MODULE LIST — "what we run"
   ============================================================ */
.module-list{border-top:1px solid var(--hair)}
.module{
  display:grid;grid-template-columns:80px 1.1fr 1.6fr auto;
  align-items:center;gap:24px;
  padding:26px 18px;border-bottom:1px solid var(--hair);
  transition:background .25s var(--ease),padding .25s var(--ease);
  position:relative;
}
.module::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--orange);
  transform:scaleY(0);transform-origin:top;transition:transform .3s var(--ease);
}
.module:hover{background:rgba(240,233,214,0.025)}
.module:hover::before{transform:scaleY(1)}
.module .idx{font-family:var(--mono);font-size:13px;color:var(--muted);letter-spacing:.1em}
.module .m-main{display:flex;flex-direction:column;min-width:0}
.module .sec{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-bottom:7px}
.module .ttl{font-family:var(--display);font-weight:700;font-size:clamp(20px,2vw,25px);color:var(--cream);letter-spacing:-0.01em}
.module .desc{color:var(--ink-dim);font-size:16px;line-height:1.5}
.module .go{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--cream);text-transform:uppercase;display:inline-flex;gap:.5em;align-items:center;white-space:nowrap}
.module .go .arr{color:var(--orange);transition:transform .25s var(--ease)}
.module:hover .go .arr{transform:translateX(4px)}

/* ============================================================
   PROOF / METRICS
   ============================================================ */
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,40px);align-items:stretch}
.metric-panel{padding:clamp(28px,3.4vw,44px)}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:30px}
.metric .n{font-family:var(--display);font-weight:700;font-size:clamp(34px,4.4vw,54px);color:var(--cream);line-height:1;letter-spacing:-0.02em}
.metric .n .u{color:var(--orange);font-size:.6em}
.metric .l{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-top:10px;line-height:1.4}

.placeholder-tag{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--amber);border:1px dashed rgba(232,168,56,0.4);
  padding:5px 10px;border-radius:2px;background:rgba(232,168,56,0.05);
}
.placeholder-tag::before{content:"";width:5px;height:5px;background:var(--amber);border-radius:50%}

/* placeholder image slot */
.img-slot{
  position:relative;border:1px solid var(--hair-2);border-radius:var(--r);overflow:hidden;
  background:
    repeating-linear-gradient(135deg, rgba(240,233,214,0.04) 0 8px, transparent 8px 16px),
    var(--surface);
  display:grid;place-items:center;min-height:200px;
}
.img-slot .meta{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);text-align:center;padding:20px}

/* testimonial */
.quote{padding:clamp(28px,3.6vw,52px)}
.quote blockquote{font-family:var(--display);font-weight:500;font-size:clamp(22px,2.6vw,32px);line-height:1.25;color:var(--cream);letter-spacing:-0.01em;text-wrap:balance}
.quote .mark-q{color:var(--orange);font-size:1.1em}
.quote figcaption{margin-top:26px;display:flex;align-items:center;gap:14px}
.quote .av{width:44px;height:44px;border-radius:50%;border:1px solid var(--hair-2);background:repeating-linear-gradient(135deg,rgba(240,233,214,0.06) 0 6px,transparent 6px 12px),var(--surface-2);flex:0 0 auto}
.quote cite{font-style:normal}
.quote cite .nm{font-family:var(--display);font-weight:700;color:var(--cream);display:block;font-size:16px}
.quote cite .ro{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

/* ============================================================
   PAi TEASER STRIP
   ============================================================ */
.pai-strip{position:relative;overflow:hidden;border:1px solid var(--hair);border-radius:var(--r);background:linear-gradient(110deg,var(--surface) 0%, #20202c 100%)}
.pai-strip-in{display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;padding:clamp(28px,3.6vw,52px)}
.pai-strip h2{font-size:clamp(26px,3vw,38px)}
.pai-strip .pai-glow{position:absolute;right:-60px;top:50%;transform:translateY(-50%);width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(224,83,31,0.22),transparent 65%);pointer-events:none}
.chip-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.chip{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--ink-dim);
  border:1px solid var(--hair-2);border-radius:100px;padding:8px 15px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.chip:hover{border-color:var(--cream);color:var(--cream)}

/* ============================================================
   CTA BAND + FOOTER
   ============================================================ */
.cta-band{text-align:center;padding-block:clamp(80px,11vw,150px)}
.cta-band h2{font-size:clamp(36px,6vw,76px);letter-spacing:-0.03em;margin-bottom:18px}
.cta-band .lead{margin:0 auto 38px}
.cta-band .btn-row{justify-content:center}

.site-footer{border-top:1px solid var(--hair);background:var(--bg-2);position:relative;z-index:1}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-block:clamp(56px,7vw,84px)}
.footer-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:18px;font-weight:400}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer-col a{color:var(--ink-dim);font-size:15px;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--cream)}
.footer-brand .lead{font-size:15px;margin-top:16px;max-width:34ch;color:var(--muted)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-block:24px;border-top:1px solid var(--hair)}
.footer-bottom .est{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}

/* ============================================================
   INNER PAGE — breadcrumb, Q&A, process
   ============================================================ */
.breadcrumb{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);display:flex;gap:.6em;flex-wrap:wrap;align-items:center}
.breadcrumb a:hover{color:var(--cream)}
.breadcrumb .sep{color:var(--hair-2)}
.breadcrumb .here{color:var(--ink-dim)}

.page-hero{padding-top:clamp(132px,16vh,180px);padding-bottom:clamp(40px,6vw,72px)}
.page-hero h1{margin:24px 0 22px;max-width:18ch}

.qa{border-top:1px solid var(--hair)}
.qa-item{display:grid;grid-template-columns:0.9fr 1.6fr;gap:clamp(20px,4vw,64px);padding-block:clamp(36px,4.4vw,60px);border-bottom:1px solid var(--hair)}
.qa-item h2{font-size:clamp(24px,2.6vw,34px)}
.qa-item .q-idx{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;margin-bottom:14px}
.qa-item p+p{margin-top:16px}
.qa-item .geo{color:var(--cream)}

.process{counter-reset:step}
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--hair);border:1px solid var(--hair);border-radius:var(--r);overflow:hidden;margin-top:36px}
.step{background:var(--surface);padding:clamp(24px,2.6vw,36px);counter-increment:step;position:relative}
.step::before{content:counter(step,decimal-leading-zero);font-family:var(--mono);font-size:12px;color:var(--orange);letter-spacing:.1em}
.step h3{margin:14px 0 10px;font-size:21px}
.step p{color:var(--ink-dim);font-size:15.5px;line-height:1.55}
.step.why{background:linear-gradient(135deg,#20202c,#1a1a24);display:flex;flex-direction:column;justify-content:center}
.step.why::before{content:"Why it works";color:var(--orange)}
.step.why p{color:var(--cream);font-size:16px;line-height:1.6;margin-top:10px}

/* feature columns (generic) */
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2.4vw,32px)}
.feature{padding:clamp(24px,2.6vw,34px)}
.feature .sec{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-bottom:14px}
.feature h3{font-size:21px;margin-bottom:10px}
.feature p{color:var(--ink-dim);font-size:15.5px;line-height:1.55}

/* contact mini */
.contact-strip{display:flex;gap:14px;flex-wrap:wrap}
.contact-card{flex:1 1 240px;padding:clamp(22px,2.4vw,32px);display:flex;flex-direction:column;gap:8px}
.contact-card .l{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.contact-card .v{font-family:var(--display);font-weight:700;font-size:clamp(20px,2vw,26px);color:var(--cream)}

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq-list{border-top:1px solid var(--hair)}
.faq-item{border-bottom:1px solid var(--hair)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:24px;
  padding:26px 6px;font-family:var(--display);font-weight:700;font-size:clamp(18px,1.9vw,24px);
  color:var(--cream);letter-spacing:-0.01em;transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#fff}
.faq-item .ic{position:relative;width:16px;height:16px;flex:0 0 auto}
.faq-item .ic::before,.faq-item .ic::after{content:"";position:absolute;background:var(--orange);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.faq-item .ic::before{top:7px;left:0;width:16px;height:2px}
.faq-item .ic::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] .ic::after{transform:rotate(90deg);opacity:0}
.faq-item .ans{padding:0 6px 30px;max-width:74ch;color:var(--ink-dim);font-size:16.5px;line-height:1.6}
.faq-item .ans p+p{margin-top:14px}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,40px);align-items:start}
.contact-direct{display:flex;flex-direction:column;gap:14px}
.contact-line{padding:clamp(22px,2.6vw,32px);display:flex;align-items:center;justify-content:space-between;gap:18px;text-decoration:none;transition:border-color .2s var(--ease),background .2s var(--ease)}
.contact-line:hover{border-color:var(--hair-2);background:rgba(240,233,214,0.025)}
.contact-line .l{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.contact-line .v{font-family:var(--display);font-weight:700;font-size:clamp(21px,2.2vw,28px);color:var(--cream);letter-spacing:-0.01em}
.contact-line .arr{color:var(--orange);font-size:20px}
form.msg{padding:clamp(24px,3vw,38px)}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.field input,.field textarea{
  font-family:var(--body);font-size:16px;color:var(--cream);background:var(--bg);
  border:1px solid var(--hair-2);border-radius:var(--r);padding:13px 14px;width:100%;resize:vertical;
  transition:border-color .2s var(--ease);
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--amber)}
.field input::placeholder,.field textarea::placeholder{color:#55555f}
.form-note{font-family:var(--mono);font-size:11px;letter-spacing:.04em;color:var(--muted);margin-top:6px}

@media (max-width: 1000px){
  .contact-grid{grid-template-columns:1fr}
}

/* ============================================================
   PAi CHAT MODULE
   ============================================================ */
.chat{display:flex;flex-direction:column;height:min(640px,74vh);overflow:hidden}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;border-bottom:1px solid var(--hair)}
.chat-head .id{display:flex;align-items:center;gap:12px}
.chat-head .id .dot{width:9px;height:9px;border-radius:50%;background:#1F8A5B;box-shadow:0 0 0 4px rgba(31,138,91,0.18)}
.chat-head .id .nm{font-family:var(--display);font-weight:700;color:var(--cream);font-size:17px}
.chat-head .id .nm span{font-style:italic;color:var(--amber);font-weight:500}
.chat-head .status{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.chat-log{flex:1;overflow-y:auto;padding:24px 22px;display:flex;flex-direction:column;gap:18px;scroll-behavior:smooth}
.chat-log::-webkit-scrollbar{width:8px}
.chat-log::-webkit-scrollbar-thumb{background:var(--hair-2);border-radius:8px}
.msg-row{display:flex;gap:12px;max-width:90%}
.msg-row.user{align-self:flex-end;flex-direction:row-reverse}
.msg-av{width:34px;height:34px;flex:0 0 auto;border-radius:50%;border:1px solid var(--hair-2);display:grid;place-items:center;background:var(--surface-2)}
.msg-av svg{width:22px;height:22px}
.msg-av.user{background:rgba(224,83,31,0.14);border-color:rgba(224,83,31,0.4);font-family:var(--mono);font-size:11px;color:var(--orange);letter-spacing:.04em}
.bubble{border:1px solid var(--hair);border-radius:var(--r);padding:14px 17px;font-size:15.5px;line-height:1.6;color:var(--cream)}
.bubble .meta{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:7px}
.bubble.pai{background:var(--surface-2)}
.bubble.user{background:rgba(224,83,31,0.10);border-color:rgba(224,83,31,0.28)}
.bubble p+p{margin-top:10px}
.bubble .cta-inline{margin-top:12px;display:inline-flex}
.typing{display:inline-flex;gap:5px;align-items:center;padding:4px 2px}
.typing span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite ease-in-out}
.typing span:nth-child(2){animation-delay:.2s}
.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
@media (prefers-reduced-motion: reduce){.typing span{animation:none}}
.chat-foot{border-top:1px solid var(--hair);padding:16px 18px}
.chat-chips{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:14px}
.chat-chip{font-family:var(--mono);font-size:11.5px;letter-spacing:.02em;color:var(--ink-dim);border:1px solid var(--hair-2);border-radius:100px;padding:8px 14px;cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);text-align:left}
.chat-chip:hover{border-color:var(--cream);color:var(--cream);background:rgba(240,233,214,0.04)}
.chat-input{display:flex;gap:10px;align-items:flex-end}
.chat-input textarea{flex:1;font-family:var(--body);font-size:15.5px;color:var(--cream);background:var(--bg);border:1px solid var(--hair-2);border-radius:var(--r);padding:13px 14px;resize:none;max-height:120px;line-height:1.5;transition:border-color .2s var(--ease)}
.chat-input textarea:focus{outline:none;border-color:var(--amber)}
.chat-input textarea::placeholder{color:#55555f}
.chat-send{flex:0 0 auto;width:50px;height:50px;border-radius:var(--r);background:var(--orange);color:#fff;display:grid;place-items:center;transition:background .2s var(--ease),transform .15s var(--ease)}
.chat-send:hover{background:#f0611f}
.chat-send:active{transform:scale(.95)}
.chat-send:disabled{opacity:.4;cursor:not-allowed}
.chat-send svg{width:20px;height:20px}
.chat-disclaimer{font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--muted);margin-top:10px;text-align:center}

/* ============================================================
   THE NUCLEUS — interactive atom diagram
   ============================================================ */
.nucleus-layout{display:grid;grid-template-columns:1fr 0.9fr;gap:clamp(28px,4vw,56px);align-items:center}
.nucleus-stage{position:relative;aspect-ratio:1;width:100%;max-width:560px;margin-inline:auto}
.nucleus-stage svg{width:100%;height:100%;overflow:visible}
.nucleus-stage .ring{fill:none;stroke:var(--cream);stroke-width:1.2;opacity:.42}
.n-core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:30%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 50% 40%, #f0611f, var(--orange)55%, #b83d12);
  display:grid;place-items:center;text-align:center;cursor:pointer;border:0;
  box-shadow:0 0 50px rgba(224,83,31,0.45);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.n-core:hover,.n-core.sel{transform:translate(-50%,-50%) scale(1.05);box-shadow:0 0 70px rgba(224,83,31,0.6)}
.n-core .cl{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,0.8)}
.n-core .cw{font-family:var(--display);font-weight:700;font-size:clamp(15px,2vw,20px);color:#fff;line-height:1}
.electron-btn{position:absolute;transform:translate(-50%,-50%);width:auto;padding:0;background:none;border:0;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:8px}
.electron-btn .e-dot{width:18px;height:18px;border-radius:50%;background:var(--cream);border:3px solid var(--bg);box-shadow:0 0 0 1px var(--hair-2);transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease)}
.electron-btn .e-lab{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);white-space:nowrap;transition:color .2s var(--ease)}
.electron-btn:hover .e-dot,.electron-btn.sel .e-dot{background:var(--amber);transform:scale(1.25);box-shadow:0 0 0 1px var(--amber),0 0 18px rgba(232,168,56,0.5)}
.electron-btn:hover .e-lab,.electron-btn.sel .e-lab{color:var(--cream)}
.electron-btn.sel .e-dot{background:var(--orange);box-shadow:0 0 0 1px var(--orange),0 0 22px rgba(224,83,31,0.6)}

.n-readout{min-height:300px}
.n-readout .panel{padding:clamp(26px,3vw,40px)}
.n-readout .r-idx{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-bottom:14px}
.n-readout h3{font-size:clamp(24px,2.6vw,34px);margin-bottom:14px}
.n-readout p{color:var(--ink-dim);font-size:16.5px;line-height:1.6}
.n-readout .r-tie{margin-top:18px;padding-top:18px;border-top:1px solid var(--hair);font-size:14.5px;color:var(--muted)}

@media (max-width: 920px){
  .nucleus-layout{grid-template-columns:1fr;gap:36px}
  .nucleus-stage{max-width:440px}
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal{opacity:0;transform:translateY(18px)}
.revealed{opacity:1;transform:none;transition:opacity .7s var(--ease),transform .7s var(--ease)}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none}
  .revealed{transition:none}
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px){
  .nav, .header-cta > .btn{display:none}
  .nav-toggle{display:flex}
  .site-header.menu-open .nav{
    display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(16,16,25,0.97);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--hair);padding:14px var(--gutter) 22px;gap:2px;
  }
  .site-header.menu-open .nav a{padding:14px 6px;font-size:14px}
  .site-header.menu-open .nav a.active::after{display:none}
  .site-header.menu-open .nav a.menu-only{display:flex;color:var(--orange);margin-top:8px;padding-top:18px;border-top:1px solid var(--hair)}
}
@media (max-width: 1000px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .atom-stage{max-width:380px;margin-inline:auto}
  .proof-grid{grid-template-columns:1fr}
  .pai-strip-in{grid-template-columns:1fr;gap:24px}
  .qa-item{grid-template-columns:1fr;gap:16px}
  .footer-top{grid-template-columns:1fr 1fr}
  .cols-3{grid-template-columns:1fr 1fr}
}
@media (max-width: 760px){
  body{font-size:16px}
  .module{grid-template-columns:48px 1fr;gap:6px 18px;padding:22px 8px}
  .module .desc{grid-column:2;margin-top:6px}
  .module .go{grid-column:2;margin-top:14px}
  .metrics{grid-template-columns:1fr;gap:18px}
  .steps,.cols-3,.footer-top{grid-template-columns:1fr}
  .hero-meta{gap:20px}
}