/* ============================================================
   AIDEX — case study site
   Design system: intentional light + dark themes
   ============================================================ */

:root{
  /* brand */
  --brand:#6B5CE7;
  --brand-2:#8F7DFF;
  --brand-ink:#4E41B8;
  /* SIGNAL phase colors */
  --s:#0D9F7A; --i:#6B5CE7; --g:#D94F2B; --n:#1A6FC4; --a:#C27A00; --l:#3D8A0E;
  --s-bg:#E6F7F3; --i-bg:#EFEDFD; --g-bg:#FDEEE9; --n-bg:#E8F2FC; --a-bg:#FEF5E4; --l-bg:#EDF7E3;
  /* light theme */
  --bg:#FAFAFD;
  --bg-2:#F3F3F9;
  --card:#FFFFFF;
  --card-2:#FCFCFE;
  --ink:#15151C;
  --ink-2:#3A3A47;
  --ink-3:#5C5C6E;
  --muted:#8A8A9C;
  --line:#E8E8F1;
  --line-2:#F0F0F7;
  --shadow:0 1px 2px rgba(21,21,28,.04),0 8px 28px rgba(21,21,28,.06);
  --shadow-lg:0 2px 6px rgba(21,21,28,.05),0 24px 70px rgba(21,21,28,.11);
  --glow:0 10px 40px rgba(107,92,231,.22);
  --nav-bg:rgba(250,250,253,.82);
  --hero-grad:radial-gradient(1100px 520px at 78% -10%,rgba(107,92,231,.13),transparent 62%),radial-gradient(800px 460px at 12% 6%,rgba(13,159,122,.09),transparent 60%);
  --band:#15151C;
  --band-ink:#F3F3F8;
  --band-muted:#A2A2B4;
  --band-line:rgba(255,255,255,.10);
  --band-card:rgba(255,255,255,.05);
  --ok:#188A5B; --ok-bg:#E3F5EC;
  --warn:#B4770A; --warn-bg:#FBF1DC;
  --bad:#C63939; --bad-bg:#FBE9E9;
  --info:#2563C4; --info-bg:#E7F0FC;
  --sans:'Inter',system-ui,-apple-system,sans-serif;
  --disp:'Sora',var(--sans);
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',monospace;
}
[data-theme="dark"]{
  --brand:#8F7DFF;
  --brand-2:#A99BFF;
  --brand-ink:#C4BAFF;
  --s:#2FC49E; --i:#9C8DFF; --g:#F0764F; --n:#4D95E8; --a:#E8A32E; --l:#6DB53A;
  --s-bg:rgba(47,196,158,.10); --i-bg:rgba(156,141,255,.10); --g-bg:rgba(240,118,79,.10);
  --n-bg:rgba(77,149,232,.10); --a-bg:rgba(232,163,46,.10); --l-bg:rgba(109,181,58,.10);
  --bg:#0B0B10;
  --bg-2:#101018;
  --card:#14141D;
  --card-2:#181822;
  --ink:#EFEFF6;
  --ink-2:#C9C9D6;
  --ink-3:#A5A5B8;
  --muted:#787890;
  --line:#232331;
  --line-2:#1B1B27;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 34px rgba(0,0,0,.42);
  --shadow-lg:0 2px 8px rgba(0,0,0,.4),0 30px 90px rgba(0,0,0,.55);
  --glow:0 10px 44px rgba(143,125,255,.26);
  --nav-bg:rgba(11,11,16,.78);
  --hero-grad:radial-gradient(1100px 520px at 78% -10%,rgba(143,125,255,.16),transparent 62%),radial-gradient(800px 460px at 12% 6%,rgba(47,196,158,.10),transparent 60%);
  --band:#101017;
  --band-ink:#EFEFF6;
  --band-muted:#8E8EA4;
  --band-line:rgba(255,255,255,.08);
  --band-card:rgba(255,255,255,.04);
  --ok:#3ECF8E; --ok-bg:rgba(62,207,142,.12);
  --warn:#E8A32E; --warn-bg:rgba(232,163,46,.12);
  --bad:#F26D6D; --bad-bg:rgba(242,109,109,.12);
  --info:#5B9DF5; --info-bg:rgba(91,157,245,.12);
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
button,input,select,textarea{color:inherit;font-family:inherit;font-size:inherit}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
@supports not (overflow-x:clip){html{overflow-x:hidden}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background-color .45s ease,color .45s ease;
  overflow-x:hidden;
}
::selection{background:var(--brand);color:#fff}
img,svg{max-width:100%;display:block}
a{color:var(--brand-ink);text-decoration:none}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
h1,h2,h3,h4{font-family:var(--disp);font-weight:700;letter-spacing:-.02em;line-height:1.12;margin:0;color:var(--ink)}
h1{font-size:clamp(40px,6.4vw,84px);letter-spacing:-.035em}
h2{font-size:clamp(30px,4vw,52px);letter-spacing:-.03em}
h3{font-size:clamp(19px,2vw,24px)}
h4{font-size:16.5px}
p{margin:0}
.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(20px,4vw,44px)}
.wrap-nar{max-width:900px;margin:0 auto;padding:0 clamp(20px,4vw,44px)}
section{position:relative}
.sec{padding:clamp(72px,9vw,132px) 0}
.sec-tight{padding:clamp(56px,7vw,96px) 0}

.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--brand-ink);margin-bottom:22px;
}
.kicker .kdot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 18%,transparent)}
.lede{font-size:clamp(16.5px,1.6vw,19.5px);line-height:1.7;color:var(--ink-3);max-width:720px;margin-top:22px}
.sec-head{margin-bottom:clamp(36px,5vw,64px)}
.sec-head.center{text-align:center}
.sec-head.center .lede{margin-left:auto;margin-right:auto}
.sec-head.center .kicker{justify-content:center}

/* ---------- reveal / motion ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.65,.25,1),transform .8s cubic-bezier(.2,.65,.25,1)}
.reveal.in{opacity:1;transform:none}
.reveal-l{opacity:0;transform:translateX(-30px);transition:opacity .8s cubic-bezier(.2,.65,.25,1),transform .8s cubic-bezier(.2,.65,.25,1)}
.reveal-r{opacity:0;transform:translateX(30px);transition:opacity .8s cubic-bezier(.2,.65,.25,1),transform .8s cubic-bezier(.2,.65,.25,1)}
.reveal-l.in,.reveal-r.in{opacity:1;transform:none}
.stagger>*{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.65,.25,1),transform .7s cubic-bezier(.2,.65,.25,1)}
.stagger.in>*{opacity:1;transform:none}
.stagger.in>*:nth-child(1){transition-delay:.02s}.stagger.in>*:nth-child(2){transition-delay:.1s}
.stagger.in>*:nth-child(3){transition-delay:.18s}.stagger.in>*:nth-child(4){transition-delay:.26s}
.stagger.in>*:nth-child(5){transition-delay:.34s}.stagger.in>*:nth-child(6){transition-delay:.42s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal-l,.reveal-r,.stagger>*{opacity:1!important;transform:none!important;transition:none!important}
  *{animation-duration:.001s!important;transition-duration:.001s!important}
}

/* ---------- progress bar ---------- */
.progress{position:fixed;top:0;left:0;height:2.5px;width:0;z-index:220;
  background:linear-gradient(90deg,var(--s),var(--i),var(--g),var(--n),var(--a),var(--l));
  transition:width .12s linear}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:200;
  background:var(--nav-bg);backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5);
  border-bottom:1px solid transparent;transition:border-color .3s,background .45s}
.nav.scrolled{border-bottom-color:var(--line)}
.nav-inner{max-width:1180px;margin:0 auto;padding:0 clamp(20px,4vw,44px);height:66px;display:flex;align-items:center;gap:26px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--disp);font-weight:800;font-size:18px;letter-spacing:-.02em;color:var(--ink)}
.logo .mark{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--n));color:#fff;font-size:13px;font-weight:800;
  box-shadow:0 4px 14px color-mix(in srgb,var(--brand) 35%,transparent)}
.logo small{font-family:var(--mono);font-weight:500;font-size:10px;letter-spacing:.14em;color:var(--muted);margin-left:2px;text-transform:uppercase}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{padding:8px 13px;border-radius:9px;font-size:13.5px;font-weight:600;color:var(--ink-3);transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ink);background:var(--bg-2)}
.nav-links a.active{color:var(--brand-ink)}
.nav-cta{display:flex;align-items:center;gap:10px;margin-left:auto}
.burger{display:none;background:none;border:0;cursor:pointer;padding:10px;margin-right:-10px}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:4.5px 0;border-radius:2px;transition:transform .3s,opacity .3s}
.burger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-menu{display:none}

/* ---------- case-study nav → left sidebar on desktop ---------- */
/* #top is position:relative so the sidebar can switch to position:absolute
   (via JS in site.js, see initSidebarPin) once its own bottom edge is
   reached, so it stops there instead of riding over the footer below.
   position:sticky can't be used here: <html> has overflow-x:clip (needed to
   stop decorative elements causing horizontal scroll), which breaks sticky's
   containing-block calculation in most engines. */
@media (min-width:1021px){
  #top{position:relative}
  .nav{top:0;left:0;right:auto;bottom:0;width:238px;border-bottom:0;border-right:1px solid transparent;
    transition:border-color .3s,background .45s}
  .nav.scrolled{border-right-color:var(--line);border-bottom:0}
  .nav-inner{max-width:none;height:100%;padding:30px 22px;flex-direction:column;align-items:stretch;gap:0;overflow-y:auto}
  .nav-inner .logo{margin-bottom:38px;flex:none}
  .nav-links{flex-direction:column;gap:2px;margin-left:0;flex:1;min-height:0}
  .nav-links a{padding:11px 14px}
  .nav-cta{flex-direction:column;align-items:stretch;gap:10px;margin-left:0;margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}
  .nav-cta .theme-toggle{align-self:flex-start}
  .burger{display:none}
  .case-content{margin-left:238px}
  .progress{left:238px}
  .hero{padding:clamp(64px,8vh,96px) 0 clamp(60px,7vw,100px)}
}
.theme-toggle{
  position:relative;width:58px;height:30px;border-radius:99px;border:1px solid var(--line);
  background:var(--bg-2);cursor:pointer;padding:0;flex:none;
  transition:background .45s,border-color .45s;
}
.theme-toggle .knob{
  position:absolute;top:2px;left:2px;width:24px;height:24px;border-radius:50%;
  background:var(--card);box-shadow:0 2px 8px rgba(0,0,0,.18);
  display:grid;place-items:center;
  transition:transform .45s cubic-bezier(.34,1.4,.4,1),background .45s;
}
[data-theme="dark"] .theme-toggle .knob{transform:translateX(28px)}
.theme-toggle svg{width:14px;height:14px;position:absolute;transition:opacity .3s,transform .5s}
.theme-toggle .sun{color:#E8A32E;opacity:1;transform:rotate(0)}
.theme-toggle .moon{color:#8F7DFF;opacity:0;transform:rotate(-90deg)}
[data-theme="dark"] .theme-toggle .sun{opacity:0;transform:rotate(90deg)}
[data-theme="dark"] .theme-toggle .moon{opacity:1;transform:rotate(0)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:12px;border:1px solid transparent;
  font-family:var(--sans);font-size:14.5px;font-weight:650;cursor:pointer;
  transition:transform .25s cubic-bezier(.34,1.5,.5,1),box-shadow .25s,background .25s,border-color .25s,color .25s;
  will-change:transform;white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{background:var(--brand-2);transform:translateY(-2px);box-shadow:0 16px 48px color-mix(in srgb,var(--brand) 38%,transparent)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--muted);background:var(--bg-2);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13px;border-radius:10px}
.btn .arr{transition:transform .3s cubic-bezier(.34,1.5,.5,1);display:inline-block}
.btn:hover .arr{transform:translateX(4px)}
.btn-dark{background:var(--ink);color:var(--bg)}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(0,0,0,.25)}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(140px,18vh,200px) 0 clamp(60px,7vw,100px);background:var(--hero-grad)}
.hero-grid-bg{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(color-mix(in srgb,var(--ink) 4%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--ink) 4%,transparent) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(900px 500px at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(900px 500px at 50% 0%,#000 30%,transparent 75%)}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;padding:7px 15px 7px 9px;border-radius:99px;
  background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);
  font-size:12.5px;font-weight:600;color:var(--ink-2);margin-bottom:30px}
.hero-badge .pulse{width:8px;height:8px;border-radius:50%;background:var(--ok);position:relative}
.hero-badge .pulse::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:1.5px solid var(--ok);animation:pulse 2s ease-out infinite}
@keyframes pulse{0%{transform:scale(.5);opacity:1}100%{transform:scale(1.4);opacity:0}}
.hero h1 .grad{background:linear-gradient(100deg,var(--brand) 10%,var(--n) 55%,var(--s) 95%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:clamp(17px,1.8vw,20px);line-height:1.65;color:var(--ink-3);max-width:640px;margin-top:26px}
.hero-ctas{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}
.hero-proof{display:flex;gap:clamp(22px,4vw,54px);margin-top:clamp(44px,5vw,64px);flex-wrap:wrap}
.hero-proof .hp .n{font-family:var(--disp);font-weight:800;font-size:clamp(24px,2.6vw,32px);letter-spacing:-.02em}
.hero-proof .hp .l{font-size:12.5px;color:var(--muted);margin-top:3px;font-weight:550}

/* hero product frame */
.hero-shot{margin-top:clamp(52px,6vw,84px);position:relative;perspective:1600px}
.hero-shot .frame{
  border-radius:20px;border:1px solid var(--line);background:var(--card);
  box-shadow:var(--shadow-lg);overflow:hidden;
  transform:rotateX(4deg) scale(.995);transform-origin:50% 0;transition:transform 1s cubic-bezier(.2,.65,.25,1)}
.hero-shot.in .frame{transform:rotateX(0) scale(1)}
.float-chip{
  position:absolute;padding:11px 16px;border-radius:14px;background:var(--card);border:1px solid var(--line);
  box-shadow:var(--shadow-lg);font-size:12.5px;font-weight:600;display:flex;align-items:center;gap:9px;
  animation:floaty 6s ease-in-out infinite;z-index:3}
.float-chip .ic{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-size:12px;color:#fff;flex:none}
.float-chip small{display:block;font-weight:500;color:var(--muted);font-size:11px;margin-top:1px}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* ---------- generic cards ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:26px;box-shadow:var(--shadow);
  transition:transform .35s cubic-bezier(.2,.65,.25,1),box-shadow .35s,border-color .35s}
.card.hov:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--brand) 30%,var(--line))}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.ic-badge{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;font-size:19px;color:#fff}
.card h3{margin-bottom:10px}
.card .body{font-size:14.5px;line-height:1.68;color:var(--ink-3)}
.card .foot{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:var(--muted);margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}

/* evidence labels */
.elabel{display:inline-flex;align-items:center;font-family:var(--mono);font-size:9.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:3px 9px;border-radius:6px;margin-right:8px;vertical-align:1px}
.elabel.verified{background:var(--ok-bg);color:var(--ok)}
.elabel.inferred{background:var(--info-bg);color:var(--info)}
.elabel.assumption{background:var(--warn-bg);color:var(--warn)}
.elabel.projected{background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand-ink)}

/* ---------- dark band (problem) ---------- */
.band{background:var(--band);color:var(--band-ink);position:relative;overflow:hidden}
.band::before{content:"";position:absolute;inset:0;
  background:radial-gradient(900px 400px at 85% 0%,rgba(143,125,255,.14),transparent 60%);pointer-events:none}
.band .kicker{color:var(--brand-2)}
.band h2,.band h3{color:var(--band-ink)}
.band .lede{color:var(--band-muted)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:54px}
.stat{background:var(--band-card);border:1px solid var(--band-line);border-radius:16px;padding:24px 22px;
  transition:transform .35s,background .35s}
.stat:hover{transform:translateY(-4px);background:rgba(255,255,255,.08)}
.stat .n{font-family:var(--disp);font-weight:800;font-size:clamp(34px,3.6vw,46px);letter-spacing:-.03em;line-height:1;
  background:linear-gradient(120deg,#fff,#B4A8FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .n small{font-size:.5em;font-weight:700}
.stat .l{font-size:13px;line-height:1.55;color:var(--band-muted);margin-top:12px}
.stat .src{font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;color:rgba(255,255,255,.34);margin-top:12px;text-transform:uppercase}
.bigquote{margin:clamp(48px,6vw,72px) auto 0;max-width:860px;text-align:center}
.bigquote p:first-child{font-family:var(--disp);font-size:clamp(20px,2.6vw,30px);font-weight:600;line-height:1.45;letter-spacing:-.015em}
.bigquote .attr{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--band-muted);margin-top:18px;text-transform:uppercase}

/* ---------- personas ---------- */
.personas{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.persona{background:var(--card);border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow);
  transition:transform .4s cubic-bezier(.2,.65,.25,1),box-shadow .4s}
.persona:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.persona .p-head{height:150px;position:relative;display:grid;place-items:center;overflow:hidden}
.persona .p-head::before{content:"";position:absolute;inset:0;
  background:radial-gradient(140px 140px at 22% 30%,rgba(255,255,255,.22),transparent 60%),radial-gradient(180px 180px at 80% 70%,rgba(255,255,255,.13),transparent 60%)}
.persona .p-init{font-family:var(--disp);font-size:38px;font-weight:800;color:rgba(255,255,255,.92);letter-spacing:.04em;position:relative}
.persona .p-body{padding:24px}
.persona h3{font-size:20px;margin-bottom:2px}
.persona .p-role{font-size:13px;color:var(--muted);font-weight:550}
.persona .p-quote{border-left:3px solid var(--brand);padding:2px 0 2px 14px;margin:16px 0;font-size:13.5px;font-style:italic;color:var(--brand-ink);line-height:1.6}
.persona .p-label{font-family:var(--mono);font-size:9.5px;font-weight:600;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;margin:14px 0 7px}
.persona ul{list-style:none;margin:0;padding:0}
.persona li{font-size:13px;color:var(--ink-2);padding:3px 0 3px 16px;position:relative;line-height:1.5}
.persona li::before{content:"";position:absolute;left:2px;top:11px;width:5px;height:5px;border-radius:50%;background:var(--brand)}
.persona .p-metric{margin-top:18px;background:color-mix(in srgb,var(--brand) 7%,transparent);border-radius:11px;padding:11px 14px;
  font-size:12.5px;font-weight:650;color:var(--brand-ink);display:flex;align-items:center;gap:8px}

/* ---------- findings ---------- */
.findings{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.finding{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;transition:transform .3s,border-color .3s,box-shadow .3s}
.finding:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--s) 45%,var(--line));box-shadow:var(--shadow)}
.finding .fid{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.12em;color:var(--s);margin-bottom:10px}
.finding h4{margin-bottom:8px;font-size:15.5px}
.finding p{font-size:13.5px;line-height:1.62;color:var(--ink-3)}
.finding em{color:var(--ink-2)}

/* method chips */
.method-strip{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.mchip{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:99px;background:var(--card);
  border:1px solid var(--line);font-size:13px;font-weight:600;color:var(--ink-2);box-shadow:var(--shadow)}
.mchip b{color:var(--brand-ink);font-weight:750}

/* ---------- decision timeline ---------- */
.timeline{position:relative;margin-top:10px}
.timeline::before{content:"";position:absolute;left:19px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--brand),var(--n) 60%,var(--s));border-radius:2px;opacity:.5}
.tl-item{position:relative;padding:0 0 30px 62px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:8px;top:2px;width:24px;height:24px;border-radius:50%;
  background:var(--card);border:2px solid var(--brand);display:grid;place-items:center;z-index:1}
.tl-dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand)}
.tl-item .tid{font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.12em;color:var(--brand-ink);text-transform:uppercase}
.tl-item h4{margin:7px 0 7px;font-size:16.5px}
.tl-item p{font-size:14px;color:var(--ink-3);line-height:1.62;max-width:560px}
.tl-item .rej{display:inline-block;margin-top:11px;font-family:var(--mono);font-size:10.5px;color:var(--bad);
  background:var(--bad-bg);padding:5px 11px;border-radius:7px;text-decoration:line-through;text-decoration-thickness:1px}

/* ---------- tradeoffs ---------- */
.trades{display:grid;gap:16px}
.trade{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--card);box-shadow:var(--shadow)}
.trade .chose,.trade .gave{padding:20px 22px}
.trade .chose{border-right:1px dashed var(--line)}
.trade .chose b{color:var(--ok);font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase}
.trade .gave b{color:var(--bad);font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase}
.trade p{font-size:14.5px;font-weight:600;margin-top:8px;line-height:1.5}
.trade .gave p{color:var(--muted);font-weight:500}
.trade .why{grid-column:1/-1;padding:13px 22px;background:var(--bg-2);border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);line-height:1.6}
.trade .why b{color:var(--brand-ink);font-family:var(--mono);font-size:10px;letter-spacing:.14em}

/* ---------- collapsible (SIGNAL + UX) ---------- */
.acc{border:1px solid var(--line);border-radius:18px;background:var(--card);box-shadow:var(--shadow);overflow:hidden;margin-bottom:14px;
  transition:border-color .3s,box-shadow .3s}
.acc.open{border-color:color-mix(in srgb,var(--acc-c,var(--brand)) 45%,var(--line));box-shadow:var(--shadow-lg)}
.acc-head{width:100%;display:flex;align-items:center;gap:18px;padding:22px 24px;background:none;border:0;cursor:pointer;text-align:left;color:var(--ink)}
.acc-head .ph-letter{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;flex:none;
  font-family:var(--disp);font-weight:800;font-size:19px;color:#fff;background:var(--acc-c,var(--brand));
  box-shadow:0 6px 18px color-mix(in srgb,var(--acc-c,var(--brand)) 35%,transparent);
  transition:transform .4s cubic-bezier(.34,1.5,.5,1)}
.acc.open .acc-head .ph-letter{transform:scale(1.06) rotate(-4deg)}
.acc-head .t{flex:1;min-width:0}
.acc-head .t h3{font-size:clamp(16px,1.8vw,20px);margin:0}
.acc-head .t .sub{font-size:13px;color:var(--muted);margin-top:3px;font-weight:550}
.acc-head .time-pill{display:flex;align-items:center;gap:8px;flex:none}
.acc-head .time-pill .old{font-size:11.5px;color:var(--muted);text-decoration:line-through}
.acc-head .time-pill .new{font-family:var(--mono);font-size:11px;font-weight:600;color:#fff;background:var(--acc-c,var(--brand));padding:4px 11px;border-radius:99px}
.acc-head .chev{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;flex:none;
  transition:transform .45s cubic-bezier(.34,1.4,.5,1),background .3s,border-color .3s}
.acc.open .acc-head .chev{transform:rotate(180deg);background:var(--acc-c,var(--brand));border-color:transparent}
.acc-head .chev svg{width:14px;height:14px;color:var(--ink-3);transition:color .3s}
.acc.open .acc-head .chev svg{color:#fff}
.acc-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .55s cubic-bezier(.2,.65,.25,1)}
.acc.open .acc-panel{grid-template-rows:1fr}
.acc-panel-inner{overflow:hidden}
.acc-content{padding:6px 24px 30px;opacity:0;transform:translateY(-8px);transition:opacity .5s .1s,transform .5s .1s}
.acc.open .acc-content{opacity:1;transform:none}

/* SIGNAL inner layout */
.sig-cols{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;margin-top:12px}
.sig-label{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:20px 0 11px}
.sig-label:first-child{margin-top:0}
.step-row{display:flex;gap:13px;padding:8px 0;align-items:flex-start}
.step-num{width:24px;height:24px;border-radius:8px;flex:none;display:grid;place-items:center;
  font-family:var(--mono);font-size:11px;font-weight:600;border:1px solid color-mix(in srgb,var(--acc-c) 40%,transparent);
  color:var(--acc-c);background:color-mix(in srgb,var(--acc-c) 8%,transparent);margin-top:2px}
.step-text{font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.tool-pills{display:flex;flex-wrap:wrap;gap:8px}
.tool-pill{padding:6px 13px;border-radius:99px;font-size:12px;font-weight:600;
  color:var(--acc-c);background:color-mix(in srgb,var(--acc-c) 9%,transparent);
  border:1px solid color-mix(in srgb,var(--acc-c) 28%,transparent);transition:transform .2s}
.tool-pill:hover{transform:translateY(-2px)}
.agent-mini{border:1px solid var(--line);border-radius:13px;padding:14px 16px;margin-bottom:10px;background:var(--card-2)}
.agent-mini .an{font-size:13px;font-weight:700;color:var(--acc-c)}
.agent-mini .ad{font-size:12.5px;color:var(--ink-3);line-height:1.55;margin-top:3px}
.out-row{display:flex;gap:10px;align-items:flex-start;padding:6px 0;font-size:13.5px;color:var(--ink-2);font-weight:550}
.out-row .dot{margin-top:6px}
.out-row>span:last-child{flex:1;min-width:0}
.out-row .dot{width:7px;height:7px;border-radius:50%;background:var(--acc-c);flex:none}
.gate-box{border:1px solid color-mix(in srgb,var(--acc-c) 30%,var(--line));border-radius:13px;padding:16px 18px;
  background:color-mix(in srgb,var(--acc-c) 5%,transparent);margin-top:6px}
.gate-box .gt{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.14em;color:var(--acc-c);text-transform:uppercase;margin-bottom:8px;display:flex;align-items:center;gap:7px}
.gate-box p{font-size:13px;line-height:1.6;color:var(--ink-2)}
.prompt-box{background:var(--band);border-radius:13px;padding:16px 18px;margin-top:6px;position:relative;overflow:hidden}
.prompt-box::before{content:"PROMPT";position:absolute;top:12px;right:14px;font-family:var(--mono);font-size:9px;letter-spacing:.18em;color:rgba(255,255,255,.35)}
.prompt-box code{font-family:var(--mono);font-size:12px;line-height:1.65;color:#D6D2FF;display:block;white-space:pre-wrap}
.dec-chip{display:block;border-left:3px solid var(--acc-c);padding:9px 0 9px 14px;margin:9px 0}
.dec-chip .dc-t{font-size:13.5px;font-weight:650;color:var(--ink)}
.dec-chip .dc-r{font-size:12px;color:var(--muted);margin-top:2px}
.dec-chip .dc-r s{color:var(--bad)}

/* SIGNAL loop diagram */
.sig-loop-wrap{position:relative;margin:0 0 40px}
.sig-loop{display:flex;align-items:stretch;justify-content:center;gap:clamp(0px,.7vw,10px);flex-wrap:nowrap;margin:0;width:100%}
.sig-node{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(3px,.9vw,9px);
  padding:clamp(6px,1.6vw,18px) clamp(0px,1.2vw,20px);border-radius:16px;cursor:pointer;
  background:var(--card);border:1px solid var(--line);flex:1 1 0;min-width:0;
  transition:transform .35s cubic-bezier(.34,1.4,.5,1),box-shadow .35s,border-color .35s;box-shadow:var(--shadow)}
.sig-node:hover,.sig-node.active{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--nc) 55%,var(--line))}
.sig-node .nc-circle{width:clamp(24px,4.4vw,44px);height:clamp(24px,4.4vw,44px);border-radius:50%;display:grid;place-items:center;flex:none;
  font-family:var(--disp);font-weight:800;font-size:clamp(10px,1.6vw,17px);color:var(--nc);background:color-mix(in srgb,var(--nc) 11%,transparent);
  border:2px solid var(--nc);transition:background .3s,color .3s,box-shadow .3s}
.sig-node.active .nc-circle{background:var(--nc);color:#fff;box-shadow:0 8px 22px color-mix(in srgb,var(--nc) 45%,transparent)}
.sig-node .nn{font-weight:700;font-size:clamp(8px,1.35vw,14px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;letter-spacing:-.06em}
.sig-node .nt{font-family:var(--mono);font-size:clamp(7px,.85vw,9.5px);color:var(--muted);letter-spacing:.02em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.sig-arrow{color:var(--muted);opacity:.6;margin:0;font-size:clamp(7px,1.3vw,17px);flex:none;display:flex;align-items:center;padding:0 1px}

/* ---------- gantt ---------- */
.gantt{border:1px solid var(--line);border-radius:18px;background:var(--card);box-shadow:var(--shadow);padding:28px;overflow-x:auto}
.gantt-inner{min-width:640px}
@media (max-width:700px){.gantt-inner{min-width:560px}}
.g-weeks{display:grid;grid-template-columns:110px repeat(14,1fr);gap:0;margin-bottom:8px}
.g-weeks span{font-family:var(--mono);font-size:9.5px;color:var(--muted);text-align:center;letter-spacing:.04em}
.g-row{display:grid;grid-template-columns:110px repeat(14,1fr);align-items:center;height:44px;position:relative}
.g-row .g-name{font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.12em;text-align:right;padding-right:16px}
.g-bar{position:absolute;top:9px;height:26px;border-radius:99px;display:flex;align-items:center;padding:0 12px;
  box-sizing:border-box;transform:scaleX(0);transform-origin:left center;transition:transform .9s cubic-bezier(.2,.65,.25,1)}
.gantt.in .g-bar{transform:scaleX(1)}
.g-bar span{font-family:var(--mono);font-size:9.5px;font-weight:600;color:#fff;white-space:nowrap}
.g-grid-line{grid-row:1;height:100%;border-left:1px dashed var(--line-2)}
.g-compress{display:flex;align-items:center;gap:14px;margin-top:22px;padding-top:20px;border-top:1px dashed var(--line);flex-wrap:wrap}
.g-compress .gc{font-size:13px;color:var(--ink-3)}
.g-compress .gc b{color:var(--ink);font-family:var(--disp)}

/* ---------- redefine ux ---------- */
.shift-row{display:grid;grid-template-columns:1fr 60px 1fr;align-items:stretch;gap:0;border:1px solid var(--line);
  border-radius:16px;overflow:hidden;margin-bottom:12px;background:var(--card);box-shadow:var(--shadow);
  transition:transform .3s,box-shadow .3s,border-color .3s}
.shift-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--brand) 35%,var(--line))}
.shift-row .from,.shift-row .to{padding:20px 22px}
.shift-row .from{background:var(--bg-2)}
.shift-row .from .st{font-size:14.5px;font-weight:600;color:var(--muted);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--bad) 55%,transparent);text-decoration-thickness:1.5px}
.shift-row .to .st{font-size:14.5px;font-weight:700;color:var(--ink)}
.shift-row .sd{font-size:12.5px;line-height:1.55;color:var(--ink-3);margin-top:6px}
.shift-row .mid{display:grid;place-items:center;color:var(--brand);position:relative}
.shift-row .mid svg{width:22px;height:22px;transition:transform .4s cubic-bezier(.34,1.5,.5,1)}
.shift-row:hover .mid svg{transform:translateX(5px)}
.shift-row .from .sicon,.shift-row .to .sicon{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;margin-bottom:12px;font-size:15px}
.shift-row .from .sicon{background:color-mix(in srgb,var(--muted) 14%,transparent);color:var(--muted)}
.shift-row .to .sicon{background:color-mix(in srgb,var(--brand) 11%,transparent);color:var(--brand)}
.shift-row[data-expandable]{cursor:pointer}
.shift-row .shift-detail{grid-column:1/-1;display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s cubic-bezier(.2,.65,.25,1)}
.shift-row .shift-detail p{overflow:hidden;font-size:13.5px;line-height:1.7;color:var(--ink-3);padding:0 22px;transition:padding .5s cubic-bezier(.2,.65,.25,1)}
.shift-row.expanded .shift-detail{grid-template-rows:1fr}
.shift-row.expanded .shift-detail p{padding:16px 22px 20px;border-top:1px solid var(--line-2)}
.shift-row::after{content:"+";position:absolute;top:14px;right:18px;font-family:var(--mono);font-size:15px;color:var(--muted);transition:transform .4s cubic-bezier(.34,1.4,.5,1)}
.shift-row.expanded::after{transform:rotate(45deg);color:var(--brand)}
.shift-row{position:relative}

/* ---------- verbs + utterance ---------- */
.verbs{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.verb{border:1px solid var(--line);background:var(--card);border-radius:14px;padding:18px 12px;text-align:center;
  transition:transform .3s cubic-bezier(.34,1.4,.5,1),box-shadow .3s,border-color .3s;cursor:default}
.verb:hover{transform:translateY(-5px) scale(1.02);box-shadow:var(--shadow-lg);border-color:var(--vc,var(--brand))}
.verb .vn{font-family:var(--mono);font-weight:700;font-size:13.5px;letter-spacing:.1em;color:var(--vc,var(--brand))}
.verb .vd{font-size:11.5px;color:var(--muted);margin-top:6px;line-height:1.45}
.utterance{background:var(--band);border-radius:18px;padding:26px 28px;font-family:var(--mono);font-size:12.5px;line-height:2.15;color:var(--band-muted);overflow-x:auto;box-shadow:var(--shadow-lg)}
.utterance .slot{display:inline-block;min-width:118px;color:#fff;font-weight:600;background:rgba(143,125,255,.22);
  border:1px solid rgba(143,125,255,.4);padding:1px 10px;border-radius:7px;margin-right:10px;font-size:11px;letter-spacing:.06em}
.utterance .dim{opacity:.55}

/* ---------- agents grid ---------- */
.agents-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.agent-card{border:1px solid var(--line);border-radius:16px;padding:20px;background:var(--card);position:relative;overflow:hidden;
  transition:transform .35s cubic-bezier(.2,.65,.25,1),box-shadow .35s,border-color .35s}
.agent-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--ac) 45%,var(--line))}
.agent-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--ac);opacity:.85}
.agent-card .anum{font-family:var(--mono);font-size:10px;font-weight:600;color:var(--ac);letter-spacing:.14em}
.agent-card .aname{font-family:var(--disp);font-weight:800;font-size:16px;letter-spacing:.02em;margin:6px 0 2px}
.agent-card .arole{font-size:11.5px;color:var(--muted);font-weight:550;margin-bottom:10px}
.agent-card .aremit{font-size:12.5px;line-height:1.58;color:var(--ink-3)}
.agent-card .aguard{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);font-size:11.5px;line-height:1.5;color:var(--ink-3)}
.agent-card .aguard b{font-family:var(--mono);font-size:9px;letter-spacing:.14em;color:var(--ac);text-transform:uppercase;display:block;margin-bottom:3px}

/* ---------- product walkthrough tabs ---------- */
.view-tabs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
.view-tab{padding:11px 22px;border-radius:12px;border:1px solid var(--line);background:var(--card);cursor:pointer;
  font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--ink-3);
  transition:all .3s cubic-bezier(.2,.65,.25,1)}
.view-tab:hover{border-color:var(--brand);color:var(--brand-ink);transform:translateY(-2px)}
.view-tab.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:var(--glow)}
.view-pane{display:none;animation:paneIn .55s cubic-bezier(.2,.65,.25,1)}
.view-pane.active{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:center}
@keyframes paneIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.view-pane .vp-desc h3{font-size:clamp(20px,2.2vw,26px);margin-bottom:14px}
.view-pane .vp-desc p{font-size:15px;line-height:1.7;color:var(--ink-3)}
.view-pane .vp-points{margin-top:20px;display:grid;gap:10px}
.vp-point{display:flex;gap:11px;align-items:flex-start;font-size:13.5px;color:var(--ink-2);line-height:1.55}
.vp-point .vpi{width:22px;height:22px;border-radius:7px;background:color-mix(in srgb,var(--brand) 10%,transparent);
  color:var(--brand);display:grid;place-items:center;font-size:11px;flex:none;margin-top:1px}

/* ---------- mock windows ---------- */
.mock{border:1px solid var(--line);border-radius:16px;background:var(--card);box-shadow:var(--shadow-lg);overflow:hidden;font-size:12px}
.mock-bar{display:flex;align-items:center;gap:7px;padding:11px 15px;border-bottom:1px solid var(--line);background:var(--bg-2)}
.mock-bar .dot{width:9px;height:9px;border-radius:50%;background:var(--line);flex:none}
.mock-bar .dot:first-child{background:#F26D6D}
.mock-bar .dot:nth-child(2){background:#E8C550}
.mock-bar .dot:nth-child(3){background:#5FC77E}
.mock-bar .ttl{font-family:var(--mono);font-size:10px;color:var(--muted);margin-left:8px;letter-spacing:.04em;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mock-bar .tier{font-family:var(--mono);font-size:8.5px;font-weight:600;color:#fff;background:var(--brand);padding:3px 8px;border-radius:5px;letter-spacing:.1em}

/* ---------- live demo ---------- */
.demo-frame-wrap{position:relative;border-radius:22px;padding:10px;
  background:linear-gradient(135deg,color-mix(in srgb,var(--brand) 45%,transparent),color-mix(in srgb,var(--n) 35%,transparent),color-mix(in srgb,var(--s) 40%,transparent));
  box-shadow:var(--shadow-lg)}
.demo-frame{border-radius:14px;overflow:hidden;background:var(--card);border:1px solid var(--line)}
.demo-frame iframe{display:block;width:100%;height:640px;border:0;background:var(--bg)}
.demo-note{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:20px;flex-wrap:wrap}
.demo-note p{font-size:13.5px;color:var(--ink-3)}

/* ---------- results ---------- */
.res-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:44px}
.res-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px 22px;text-align:center;box-shadow:var(--shadow);
  transition:transform .35s,box-shadow .35s}
.res-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.res-card .n{font-family:var(--disp);font-weight:800;font-size:clamp(34px,3.4vw,44px);letter-spacing:-.03em;color:var(--brand-ink)}
.res-card .n .un{font-size:.45em;font-weight:700;color:var(--muted)}
.res-card .l{font-size:12.5px;color:var(--ink-3);margin-top:8px;line-height:1.5;font-weight:550}
.res-table{width:100%;border-collapse:separate;border-spacing:0;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.res-table th{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
  text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--bg-2)}
.res-table td{padding:15px 18px;font-size:13.5px;line-height:1.55;color:var(--ink-2);border-bottom:1px solid var(--line-2);vertical-align:top}
.res-table tr:last-child td{border-bottom:0}
.res-table td b{color:var(--ink)}

/* ---------- footer ---------- */
.footer{background:var(--band);color:var(--band-ink);padding:clamp(64px,8vw,100px) 0 44px;position:relative;overflow:hidden}
.footer::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 320px at 15% 0%,rgba(143,125,255,.13),transparent 60%);pointer-events:none}
.footer .f-head{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:end;margin-bottom:56px}
.footer h2{color:var(--band-ink);font-size:clamp(28px,3.6vw,46px)}
.footer .f-sub{color:var(--band-muted);font-size:15.5px;line-height:1.7;margin-top:16px;max-width:480px}
.footer .f-cta{display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}
.f-meta{display:flex;justify-content:space-between;align-items:center;gap:18px;padding-top:26px;border-top:1px solid var(--band-line);flex-wrap:wrap}
.f-meta .fm{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--band-muted)}
.f-meta a{color:var(--band-ink);transition:color .2s}
.f-meta a:hover{color:var(--brand-2)}

/* ---------- to top ---------- */
.to-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:var(--card);color:var(--ink);cursor:pointer;display:grid;place-items:center;z-index:150;
  opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .3s,transform .3s,box-shadow .3s;box-shadow:var(--shadow)}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .grid-4,.res-grid,.stat-grid{grid-template-columns:repeat(2,1fr)}
  .agents-grid{grid-template-columns:repeat(2,1fr)}
  .verbs{grid-template-columns:repeat(3,1fr)}
  .sig-cols{grid-template-columns:1fr}
  .view-pane.active{grid-template-columns:1fr;gap:26px}
  .footer .f-head{grid-template-columns:1fr}
  .footer .f-cta{justify-content:flex-start}
  /* Below the sidebar breakpoint there isn't room for logo + all nav links +
     theme toggle + launch button in one row (measured deficit ~180px at
     768px) — use the hamburger pattern for the whole range instead of a
     fragile in-between horizontal layout. */
  .nav-links{display:none}
  .burger{display:block}
  .mobile-menu-scrim{position:fixed;inset:0;top:66px;z-index:185;background:rgba(0,0,0,.35);
    opacity:0;pointer-events:none;transition:opacity .3s}
  .mobile-menu-scrim.open{opacity:1;pointer-events:auto}
  .mobile-menu{display:block;position:fixed;top:66px;left:0;right:0;z-index:190;background:var(--card);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-lg);max-height:calc(100vh - 66px);overflow-y:auto;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:transform .3s,opacity .3s}
  .mobile-menu.open{transform:none;opacity:1;pointer-events:auto}
  .mobile-menu a{display:block;padding:15px 24px;font-size:15px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line-2)}
  .nav-cta .btn-launch-nav{display:none}
}
@media (max-width:520px){
  .sig-node .nt{display:none}
  .sig-node{border-radius:12px}
}
@media (max-width:760px){
  .hero{padding-bottom:32px}
  .sec{padding:44px 0}
  .sec-tight{padding:36px 0}
  .grid-3,.grid-2,.personas,.findings{grid-template-columns:1fr}
  .trade{grid-template-columns:1fr}
  .trade .chose{border-right:0;border-bottom:1px dashed var(--line)}
  .shift-row{grid-template-columns:1fr}
  .shift-row .mid{padding:6px 0;transform:rotate(90deg)}
  .verbs{grid-template-columns:repeat(2,1fr)}
  .agents-grid{grid-template-columns:1fr}
  .hero-ctas .btn{flex:1;justify-content:center}
  .acc-head .time-pill .old{display:none}
  .acc-head{padding:18px 16px;gap:12px}
  .acc-content{padding:4px 16px 24px}
  .stat-grid,.res-grid{grid-template-columns:1fr 1fr}
  .demo-frame iframe{height:520px}
}
@media (max-width:480px){
  .stat-grid,.res-grid,.grid-4{grid-template-columns:1fr}
  .verbs{grid-template-columns:repeat(2,1fr)}
}

/* hero mock responsiveness */
.hm-grid{display:grid;grid-template-columns:150px minmax(0,1fr);min-height:340px}
.hm-rail{border-right:1px solid var(--line);padding:16px 12px;display:flex;flex-direction:column;gap:5px;background:var(--bg-2)}
.hm-tiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
@media (max-width:860px){
  .hm-tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .hm-grid{grid-template-columns:minmax(0,1fr)}
  .hm-rail{flex-direction:row;flex-wrap:wrap;border-right:0;border-bottom:1px solid var(--line)}
  .float-chip{display:none}
}
.tbl-wide{min-width:640px}
@media (max-width:700px){.tbl-wide{min-width:560px}}
.tbl-scroll{position:relative;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:thin;
  scrollbar-color:var(--muted) transparent}
.tbl-scroll::-webkit-scrollbar{height:6px}
.tbl-scroll::-webkit-scrollbar-thumb{background:var(--muted);border-radius:99px}
.tbl-scroll::-webkit-scrollbar-track{background:transparent}
@media (max-width:700px){
  .tbl-scroll{-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 28px),transparent);
    mask-image:linear-gradient(90deg,#000 calc(100% - 28px),transparent)}
  .tbl-scroll.at-end{-webkit-mask-image:none;mask-image:none}
}
.tool-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
@media (max-width:1020px){.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:520px){.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* ===== Portfolio nav + footer (replica of sumit portfolio home) ===== */