/* ============================================================
   WhyMinds AI — Blueprint Design System
   Base: two-tier graphite-ink · accent: cyan + amber
   Typeface: IBM Plex Sans / IBM Plex Mono
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* ---------- 1. TOKENS ---------- */
:root{
  /* two-tier graphite-ink surfaces */
  --canvas:#101215;        /* page canvas — gravitas tier */
  --canvas-2:#0B0D10;      /* deepest (footer, wells) */
  --canvas-3:#0E1013;      /* between */
  --panel:#191C21;         /* graphite — raised surfaces */
  --panel-2:#20242B;       /* elevated within panel (rows, hovers, header cells) */
  --panel-3:#272C34;       /* highest elevation */
  /* ink */
  --ink:#EDF2F6;
  --ink-dim:#C4CDD6;
  --muted:#97A2AE;
  --faint:#616B76;
  /* accents */
  --cyan:#8FE0FF;
  --cyan-dim:#4FA8D8;
  --cyan-deep:#2E7DA6;
  --amber:#F5B84E;
  --amber-dim:#B78427;
  /* signature accents — per micro-site (the product house); all tuned for near-black */
  --sig-regahead:#43E0C8;      /* RegAhead — teal-cyan */
  --sig-octelos:#9B8CFF;       /* Octelos — education violet */
  --sig-ecosens:#57D9A3;       /* EcoSens — sustainable green */
  --sig-foresight:#5CC8E0;     /* ForeSight — oversight teal */
  --sig-firstprinciples:#8FE0FF;/* FirstPrinciples — core cyan */
  --sig-firstshield:#F5A24E;   /* FirstShield — protective amber */
  --sig-picolens:#64C8FF;      /* PICOLens — clarity/aperture blue */
  --sig-profound:#7E93FF;      /* Profound — strategic indigo */
  --sig-pristine:#43D6B0;      /* Pristine — clean/verified teal-green */
  --sig-prodigi:#F3A24E;       /* Prodigi — build amber */
  --sig-polygon:#A98CFF;       /* Polygon — scale violet */
  --sig-beacon:#3FA9F5;        /* Beacon — BFSI signal azure */
  --sig-matrix:#33CC8A;        /* Matrix — Healthcare vitals green */
  --sig-cosmos:#FF7A59;        /* Cosmos — Retail/E-com demand coral */
  --sig-stream:#C86BFF;        /* Stream — Media flow magenta */
  /* lines */
  --line:rgba(143,224,255,.22);       /* schematic accent line */
  --panel-line:rgba(255,255,255,.08); /* hairline on surfaces */
  --panel-line-2:rgba(255,255,255,.14);
  --grid:rgba(255,255,255,.045);      /* canvas engineering grid */
  --steel:rgba(180,196,214,.4);       /* dashed secondary linework */
  /* elevation */
  --e1:0 14px 34px -24px rgba(0,0,0,.7);
  --e2:0 24px 60px -34px rgba(0,0,0,.85);
  /* geometry */
  --r:4px;          /* blueprint sharpness */
  --r-lg:8px;
  --r-pill:100px;
  --maxw:1200px;
  --gutter:34px;
  /* motion */
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:.6s;
  /* type */
  --font-sans:'IBM Plex Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --font-mono:'IBM Plex Mono','SFMono-Regular',Menlo,monospace;
}

/* ---------- 2. BASE ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--canvas);color:var(--ink);font-family:var(--font-sans);line-height:1.62;
  overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
h1,h2,h3,h4{font-weight:600;letter-spacing:-.015em;line-height:1.08}
::selection{background:var(--cyan);color:#062330}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 3. LAYOUT ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.wrap-narrow{max-width:820px;margin:0 auto;padding:0 var(--gutter)}
.pad{padding:116px 0}
.pad-sm{padding:64px 0}
section{position:relative;z-index:2}
.center{text-align:center}
.divider{height:1px;background:var(--panel-line);margin:0;border:0}
.grid{display:grid;gap:22px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}

/* ---------- 4. BACKGROUND SYSTEM ---------- */
.grid-bg{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:30px 30px;mask-image:radial-gradient(135% 100% at 50% 0%,#000 30%,transparent 78%)}
.vignette{position:fixed;inset:0;z-index:0;pointer-events:none;background:radial-gradient(120% 100% at 50% 0%,transparent 58%,rgba(0,0,0,.5))}
.regmark{position:fixed;width:20px;height:20px;z-index:1;pointer-events:none;opacity:.4}
.regmark::before,.regmark::after{content:"";position:absolute;background:var(--cyan-dim)}
.regmark::before{left:9px;top:0;width:1px;height:20px}
.regmark::after{top:9px;left:0;height:1px;width:20px}
.rm-tl{top:16px;left:16px}.rm-tr{top:16px;right:16px}.rm-bl{bottom:16px;left:16px}.rm-br{bottom:16px;right:16px}

/* ---------- 5. TYPOGRAPHY ---------- */
.h-display{font-size:clamp(2.7rem,5.8vw,4.9rem);letter-spacing:-.03em}
.h-1{font-size:clamp(2rem,3.8vw,3rem)}
.h-2{font-size:clamp(1.7rem,3vw,2.4rem)}
.h-3{font-size:clamp(1.3rem,2.1vw,1.6rem)}
.lead{font-size:clamp(1.03rem,1.4vw,1.22rem);color:var(--ink-dim);max-width:56ch}
.muted{color:var(--muted)}
.ink-dim{color:var(--ink-dim)}
.mono{font-family:var(--font-mono)}
.cyan{color:var(--cyan)}
.amber{color:var(--amber)}
.statement{font-size:clamp(1.7rem,3.4vw,2.8rem);font-weight:600;letter-spacing:-.02em;line-height:1.18;max-width:22ch}
.statement em{font-style:normal;color:var(--cyan)}
.callout{border-left:3px solid var(--cyan);border-radius:0;padding:6px 0 6px 22px;font-size:1.35rem;line-height:1.35;color:var(--ink)}
/* label / kicker (blueprint) */
.lbl{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);display:inline-flex;gap:10px;align-items:center}
.lbl .sq{width:8px;height:8px;border:1px solid var(--amber);flex:0 0 auto}
.mono-label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.anno{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--amber)}
/* section head */
.shead{max-width:660px;margin-bottom:44px}
.shead.center{margin-left:auto;margin-right:auto}
.shead h2{font-size:clamp(2rem,3.6vw,2.9rem);margin:16px 0 14px}

/* ---------- 6. SURFACES ---------- */
.panel{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);box-shadow:var(--e2)}
.panel-2{background:var(--panel-2);border:1px solid var(--panel-line);border-radius:var(--r)}
.well{background:var(--canvas-2);border:1px solid var(--panel-line);border-radius:var(--r)}

/* ---------- 7. BUTTONS ---------- */
.btn{font-family:var(--font-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;
  padding:12px 22px;cursor:pointer;border:1px solid var(--cyan-dim);color:var(--ink);background:transparent;
  border-radius:var(--r);transition:.28s;display:inline-flex;gap:9px;align-items:center;white-space:nowrap}
.btn:hover{background:var(--cyan);color:#062330;border-color:var(--cyan)}
.btn-amber{border-color:var(--amber);color:var(--amber)}
.btn-amber:hover{background:var(--amber);color:#2A1B05;border-color:var(--amber)}
.btn-solid{background:var(--cyan);color:#062330;border-color:var(--cyan)}
.btn-solid:hover{background:#B4ECFF;border-color:#B4ECFF}
.btn-ghost{border-color:var(--panel-line-2);color:var(--ink)}
.btn-ghost:hover{background:transparent;border-color:var(--cyan);color:var(--cyan)}
.btn-lg{padding:15px 28px;font-size:13px}
.btn .arw{transition:.3s}.btn:hover .arw{transform:translateX(4px)}
.link-arrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--cyan);display:inline-flex;gap:8px;align-items:center}
.link-arrow .arw{transition:.3s}.link-arrow:hover .arw{transform:translateX(5px)}

/* ---------- 8. CHIPS / TAGS / PILLS / BADGES ---------- */
.tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  padding:6px 12px;border:1px solid var(--panel-line-2);border-radius:var(--r);color:var(--muted)}
.tag.on{background:var(--panel-2);border-color:var(--cyan-dim);color:var(--cyan)}
.impact-tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);border:1px solid var(--amber-dim);border-radius:3px;padding:2px 7px}
.pill{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  padding:7px 14px;border:1px solid var(--cyan-dim);border-radius:var(--r-pill);color:var(--cyan)}
.pill.amber{border-color:var(--amber);color:var(--amber)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);flex:0 0 auto}
.dot.amber{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.badge{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);background:var(--panel);border:1px solid var(--panel-line);padding:8px 14px;border-radius:var(--r-pill)}

/* ---------- 9. CARDS ---------- */
.card{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);padding:28px;
  box-shadow:var(--e1);transition:transform .4s var(--ease),border-color .4s,box-shadow .4s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);border-color:var(--cyan-dim);box-shadow:var(--e2)}
.card .idx{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--amber)}
.card h3{font-size:1.3rem;margin:12px 0 10px}
.card p{font-size:14px;color:var(--muted);margin:0}
.card .top-rule{position:absolute;top:0;left:0;height:2px;width:0;background:linear-gradient(90deg,var(--cyan),var(--amber));transition:width .5s var(--ease)}
.card:hover .top-rule{width:100%}
.card .conn{position:absolute;right:-6px;top:40px;width:11px;height:11px;border-top:1px solid var(--cyan);border-right:1px solid var(--cyan);transform:rotate(45deg);background:var(--canvas);z-index:2}

/* ---------- 10. FEATURE LIST ---------- */
.flist{list-style:none;margin:16px 0 0}
.flist li{padding:11px 0 11px 24px;border-bottom:1px solid var(--panel-line);font-size:14px;color:var(--ink-dim);position:relative}
.flist li::before{content:"+";position:absolute;left:2px;top:10px;color:var(--amber);font-family:var(--font-mono)}

/* ---------- 11. STATS ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.stat b{font-family:var(--font-sans);font-size:clamp(2rem,3.6vw,2.6rem);font-weight:600;color:var(--cyan);display:block;line-height:1}
.stat span{font-size:12.5px;color:var(--muted);margin-top:8px;display:block;max-width:22ch}

/* ---------- 12. SPEC TABLE ---------- */
.spec-panel{padding:8px 26px 12px}
.spec{width:100%;border-collapse:collapse;font-size:14px}
.spec th,.spec td{text-align:left;padding:16px 14px;border-bottom:1px solid var(--panel-line);vertical-align:top}
.spec thead th{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);border-bottom:1px solid var(--cyan-dim)}
.spec tbody tr{transition:.25s}
.spec tbody tr:hover{background:var(--panel-2)}
.spec .id{font-family:var(--font-mono);color:var(--amber);font-size:13px}
.spec .nm{font-weight:600}
.spec td.val{font-family:var(--font-mono);color:var(--cyan);font-size:12px;white-space:nowrap}

/* ---------- 13. PIPELINE / ARC ---------- */
.arc{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.arc .card:last-child .conn{display:none}
.arc .step{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--amber)}

/* ---------- 14. SCHEMATIC BOARD ---------- */
.board{position:relative;padding:16px}
.board .stamp{position:absolute;top:12px;right:14px;font-family:var(--font-mono);font-size:9px;letter-spacing:.12em;color:var(--faint)}
.board .elev{position:absolute;left:14px;bottom:10px;font-family:var(--font-mono);font-size:9px;letter-spacing:.1em;color:var(--faint)}
.viz{position:relative;height:400px}
.viz svg{width:100%;height:100%}
.viz text{font-family:'IBM Plex Mono',monospace}
.draw line,.draw rect,.draw circle,.draw path,.draw polyline{stroke-dasharray:var(--len,1300);stroke-dashoffset:var(--len,1300);transition:stroke-dashoffset 1.7s ease}
.draw.in line,.draw.in rect,.draw.in circle,.draw.in path,.draw.in polyline{stroke-dashoffset:0}
.node{animation:breathe 4.2s ease-in-out infinite}
.node:nth-child(2n){animation-delay:1.3s}
@keyframes breathe{0%,100%{opacity:.55}50%{opacity:1}}

/* ---------- 15. DIMENSION LINE / ELEVATION LEGEND ---------- */
.dimstrip{position:relative;z-index:2;padding:22px 0}
.dimstrip svg{width:100%;height:44px}
.dimstrip text{font-family:'IBM Plex Mono',monospace}
.elevchip{display:inline-flex;align-items:center;gap:16px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--muted);
  border:1px solid var(--panel-line);border-radius:var(--r);padding:10px 16px;background:var(--panel);flex-wrap:wrap}
.elevchip .sw{display:inline-flex;align-items:center;gap:8px}
.elevchip i{width:16px;height:16px;border-radius:3px;border:1px solid var(--panel-line);display:inline-block}

/* ---------- 16. FORMS ---------- */
.field{margin-bottom:18px}
.field label{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.input,.field input,.field select,.field textarea{width:100%;padding:13px 15px;border-radius:var(--r);border:1px solid var(--panel-line-2);
  background:var(--panel-2);color:var(--ink);font-family:var(--font-sans);font-size:15px;transition:.25s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan);background:var(--panel)}
.field textarea{min-height:120px;resize:vertical}
.field .hint{font-size:12px;color:var(--faint);margin-top:8px}

/* ---------- 17. ACCORDION ---------- */
.acc{border-top:1px solid var(--panel-line)}
.acc .item{border-bottom:1px solid var(--panel-line)}
.acc .q{width:100%;text-align:left;background:none;border:0;padding:20px 0;font-size:1.08rem;font-weight:600;color:var(--ink);
  cursor:pointer;display:flex;justify-content:space-between;gap:20px;font-family:var(--font-sans)}
.acc .q .pm{flex:0 0 auto;width:20px;height:20px;position:relative}
.acc .q .pm::before,.acc .q .pm::after{content:"";position:absolute;background:var(--cyan);transition:.3s}
.acc .q .pm::before{top:9px;left:0;width:20px;height:2px}
.acc .q .pm::after{top:0;left:9px;width:2px;height:20px}
.acc .item.open .pm::after{transform:rotate(90deg);opacity:0}
.acc .a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.acc .a p{padding:0 0 20px;color:var(--muted);margin:0;max-width:70ch}

/* ---------- 18. TABS ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:32px}
.tab{font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;text-transform:uppercase;padding:10px 18px;border-radius:var(--r);
  border:1px solid var(--panel-line);background:transparent;cursor:pointer;color:var(--muted);transition:.25s}
.tab.on{background:var(--panel-2);color:var(--cyan);border-color:var(--cyan-dim)}
.tabpane{display:none}
.tabpane.on{display:block;animation:fade .5s ease}
@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- 19. HEADER / NAV ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:40;padding:18px 0;transition:.35s;border-bottom:1px solid transparent}
.site-header.solid{background:rgba(16,18,21,.82);backdrop-filter:blur(14px);border-color:var(--panel-line);padding:12px 0}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:baseline}
.brand img{height:26px;width:auto;aspect-ratio:1565/313;opacity:.96}
.brand .sheet{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--faint);margin-left:12px}
.nav-links{display:flex;gap:4px;list-style:none;margin:0;padding:0;align-items:center}
.nav-links>li>a,.nav-trigger{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);
  padding:8px 12px;transition:.2s;background:none;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.nav-links>li>a:hover,.nav-trigger:hover,.nav-links>li.active>a{color:var(--cyan)}
.nav-item{position:relative}
.nav-trigger .caret{width:7px;height:7px;border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;transform:rotate(45deg) translateY(-2px);opacity:.7}
.dropdown{position:absolute;top:calc(100% + 10px);left:0;min-width:240px;background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);
  padding:8px;box-shadow:var(--e2);opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:none}
.dropdown a{display:block;padding:10px 12px;border-radius:var(--r);transition:.2s}
.dropdown a:hover{background:var(--panel-2)}
.dropdown a b{display:block;font-family:var(--font-sans);font-weight:600;font-size:14px;text-transform:none;letter-spacing:0;color:var(--ink)}
.dropdown a span{font-size:12px;color:var(--faint)}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--ink);transition:.3s}
.mobile-menu{display:none}

/* ---------- 20. FOOTER ---------- */
.site-footer{border-top:1px solid var(--cyan-dim);background:var(--canvas-2);position:relative;z-index:2}
.foot-block{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;font-family:var(--font-mono);font-size:11px}
.foot-block>div{padding:26px 22px;border-right:1px solid var(--panel-line)}
.foot-block .k{color:var(--faint);letter-spacing:.1em;text-transform:uppercase;font-size:10px;margin-bottom:8px}
.foot-block .v{color:var(--ink);letter-spacing:.03em;line-height:1.9}
.foot-block .v a{display:block;color:var(--ink-dim);transition:.2s}
.foot-block .v a:hover{color:var(--cyan)}

/* ---------- 21. CTA BAND ---------- */
.ctaband{text-align:center;padding:108px 0}
.ctaband h2{font-size:clamp(2rem,4.4vw,3.4rem);margin:16px 0 20px}

/* ---------- 22. HERO (interior + home) ---------- */
.hero{position:relative;z-index:2;min-height:100vh;display:flex;align-items:center;padding:126px 0 60px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.sheet-meta{display:flex;gap:22px;flex-wrap:wrap;font-family:var(--font-mono);font-size:11px;color:var(--faint);letter-spacing:.06em;margin-bottom:22px;padding-bottom:16px;border-bottom:1px solid var(--panel-line)}
.sheet-meta b{color:var(--cyan);font-weight:500}
.hero h1{font-size:clamp(2.7rem,5.8vw,4.9rem);letter-spacing:-.03em;margin:16px 0 22px}
.u{position:relative;color:var(--cyan)}
.u::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;background:repeating-linear-gradient(90deg,var(--amber) 0 8px,transparent 8px 14px)}
.cta-row{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.trust{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap}
.trust .t b{font-weight:600;font-size:1.9rem;display:block;line-height:1;color:var(--ink)}
.trust .t span{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--muted);margin-top:7px;display:block;max-width:18ch}
.phero{position:relative;z-index:2;padding:160px 0 60px}
.phero .breadcrumb{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.phero h1{font-size:clamp(2.4rem,5vw,4rem);margin:16px 0 20px;max-width:20ch}

/* ---------- 23. MOTION UTILITY ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}

/* ---------- 23b. RICH MOTION (scroll-storytelling) ---------- */
.scroll-prog{position:fixed;top:0;left:0;height:2px;width:0;z-index:60;background:linear-gradient(90deg,var(--cyan),var(--amber));transition:width .1s linear}
.reveal-l{opacity:0;transform:translateX(-30px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal-r{opacity:0;transform:translateX(30px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal-l.in,.reveal-r.in{opacity:1;transform:none}
.seq>*{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.seq.in>*{opacity:1;transform:none}
.seq.in>*:nth-child(2){transition-delay:.09s}
.seq.in>*:nth-child(3){transition-delay:.18s}
.seq.in>*:nth-child(4){transition-delay:.27s}
.seq.in>*:nth-child(5){transition-delay:.36s}
.seq.in>*:nth-child(6){transition-delay:.45s}
[data-parallax]{will-change:transform}
/* sticky scrollytelling scene */
.scene{position:relative}
.scene .sticky{position:sticky;top:0;min-height:100vh;display:flex;align-items:center}
.scene .steps{position:relative}
.scene .step-card{min-height:82vh;display:flex;flex-direction:column;justify-content:center;opacity:.28;transition:opacity .5s ease}
.scene .step-card.active{opacity:1}
.scene .step-card .sn{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--amber)}
.kpi{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);padding:24px}
.kpi b{font-size:2rem;font-weight:600;color:var(--cyan);display:block;line-height:1}
.kpi span{font-size:13px;color:var(--muted);margin-top:8px;display:block}
.in-nav{position:sticky;top:0;z-index:30;background:rgba(16,18,21,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--panel-line);padding:11px 0}
.in-nav .wrap{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.in-nav a{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:6px 11px;border-radius:var(--r);transition:.2s;white-space:nowrap}
.in-nav a:hover,.in-nav a.on{color:var(--cyan);background:var(--panel-2)}

/* ---------- 24. RESPONSIVE ---------- */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .g-3{grid-template-columns:1fr}
  .arc{grid-template-columns:repeat(2,1fr)}
  .arc .card .conn{display:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .foot-block{grid-template-columns:1fr 1fr}
  .nav-links,.nav-cta .btn{display:none}
  .burger{display:flex}
  .viz{height:330px}
  /* scroll-scenes degrade to a simple stack on tablet/mobile */
  .scene .sticky{position:static;min-height:auto;display:block}
  .scene .step-card{min-height:auto;opacity:1;padding:22px 0}
}
/* correct mobile viewport height (avoids address-bar jump / CLS) */
@supports (min-height:100svh){
  .hero{min-height:100svh}
  .scene .sticky{min-height:100svh}
}
/* respect data-saver / low-end: soften continuous spins */
@media (prefers-reduced-motion:reduce){.ring,.node,.corepulse{animation:none!important}}
/* larger tap targets on touch */
@media(hover:none){.nav-links>li>a,.dropdown a,.in-nav a,.jump{padding-top:11px;padding-bottom:11px}}
@media(max-width:560px){
  .pad{padding:76px 0}
  .g-2,.g-4,.arc,.stats{grid-template-columns:1fr}
  .brand .sheet{display:none}
  .mobile-menu.open{display:block;position:fixed;inset:0;z-index:39;background:var(--canvas);padding:96px 30px 40px;overflow:auto}
  .mobile-menu.open a{display:block;padding:15px 0;border-bottom:1px solid var(--panel-line);color:var(--ink);font-family:var(--font-mono);font-size:14px;letter-spacing:.04em;text-transform:uppercase}
}