/* Carbon Intelligence, design system (from DESIGN.md) */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

:root{
  --ink:#1B1B19;
  --accent:#C6F24E;
  --accent-ink:#1B1B19;
  --canvas:#F4F4F2;
  --surface:#FFFFFF;
  --surface-muted:#ECECEA;
  --line:#E4E4E1;
  --text:#1B1B19;
  --text-muted:#6E6E69;          /* darkened from brand 8B8B86 for AA */
  --text-on-dark:#A6A6A1;
  --radius:20px;
  --radius-lg:28px;
  --shadow:0 14px 40px rgba(0,0,0,.07);
  --shadow-sm:0 8px 24px rgba(0,0,0,.06);
  --maxw:1180px;
  --space:clamp(64px,9vw,120px);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Manrope',system-ui,-apple-system,sans-serif;
  background:var(--canvas);color:var(--text);
  line-height:1.55;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- type ---------- */
h1,h2,h3{letter-spacing:-.02em;line-height:1.04;font-weight:700}
h1{font-size:clamp(2.4rem,5.4vw,4.1rem);font-weight:800}
h2{font-size:clamp(1.9rem,3.6vw,2.9rem)}
h3{font-size:1.25rem;line-height:1.2}
.lead{font-size:clamp(1.05rem,1.6vw,1.3rem);color:var(--text-muted);max-width:46ch}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.78rem;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--text-muted)}
.eyebrow::before{content:"";width:13px;height:13px;background:var(--accent);border-radius:3px;flex:none}
.eyebrow.on-dark{color:var(--accent)}
.muted{color:var(--text-muted)}
.accent-text{color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:999px;
  font-weight:700;font-size:.98rem;border:1.5px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-secondary{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-secondary:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-ghost-dark{background:transparent;color:#fff;border-color:#3a3a37}
.btn-ghost-dark:hover{border-color:#6e6e69}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(244,244,242,.82);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:74px}
.nav-logo img{height:30px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:.95rem;font-weight:500;color:var(--text);transition:.15s}
.nav-links a:hover{color:var(--text-muted)}
.nav-links a.active{font-weight:700}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:0;font-size:1.5rem;cursor:pointer}

/* ---------- sections ---------- */
section{padding:var(--space) 0}
.section-head{max-width:60ch;margin-bottom:48px}
.section-head h2{margin:14px 0 16px}

/* ---------- hero ---------- */
.hero{padding:clamp(60px,8vw,110px) 0 var(--space)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{margin:18px 0 22px;line-height:.9;letter-spacing:-.035em}
.hero .lead{max-width:48ch;margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;aspect-ratio:1/1;background:var(--ink);border-radius:var(--radius-lg);
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero-visual .hero-glyph{width:62%;opacity:.96}
.hero-visual .hero-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}

/* ---------- dark section ---------- */
.dark{background:var(--ink);color:#fff}
.dark h2,.dark h1{color:#fff}
.dark .lead,.dark p{color:var(--text-on-dark)}
.dark .card{background:#242422;border-color:#2f2f2c}
.dark .card h3{color:#fff}

/* ---------- cards / bento ---------- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow-sm)}
.card.muted{background:var(--surface-muted);box-shadow:none;border-color:transparent}
.card.flat{box-shadow:none}
.card h3{margin-bottom:10px}
.card p{color:var(--text-muted);font-size:.98rem}
.card-icon{width:58px;height:58px;border-radius:14px;background:var(--canvas);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.card-icon.accent{background:var(--accent)}
.card-icon img{width:30px;height:30px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm)}
.stat.dark{background:var(--ink);border-color:var(--ink)}
.stat .num{font-size:2.4rem;font-weight:800;letter-spacing:-.03em;line-height:1}
.stat.dark .num{color:var(--accent)}
.stat .unit{font-size:.95rem;font-weight:700;color:var(--text-muted);margin-left:4px}
.stat.dark .unit{color:#fff}
.stat .lbl{margin-top:12px;font-size:.9rem;color:var(--text-muted)}
.stat.dark .lbl{color:var(--text-on-dark)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.step .n{width:42px;height:42px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.step:last-child .n{background:var(--accent);color:var(--accent-ink)}
.step h3{font-size:1.05rem;margin-bottom:8px}
.step p{font-size:.9rem;color:var(--text-muted)}

/* ---------- logos strip ---------- */
.logos{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;align-items:center}
.logo-tile{background:var(--surface);border:1px solid var(--line);border-radius:16px;
  height:96px;display:flex;align-items:center;justify-content:center;padding:18px;box-shadow:var(--shadow-sm)}
.logo-tile img{max-height:46px;width:auto;object-fit:contain}

/* ---------- callout ---------- */
.callout{background:var(--ink);color:#fff;border-radius:var(--radius);padding:34px 38px;margin-top:30px}
.callout .eyebrow{margin-bottom:14px}
.callout p{color:#fff;max-width:none}

/* ---------- pillars ---------- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pillar{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 30px;text-align:center;box-shadow:var(--shadow-sm)}
.pillar .glyph{width:84px;height:84px;border-radius:50%;background:var(--canvas);
  margin:0 auto 22px;display:flex;align-items:center;justify-content:center}
.pillar:last-child .glyph{background:var(--accent)}
.pillar .glyph img{width:42px;height:42px}

/* ---------- cta band ---------- */
.cta-band{text-align:center}
.cta-band .container{max-width:760px}
.cta-band h2{margin-bottom:18px}
.cta-band .hero-cta{justify-content:center;margin-top:30px}

/* ---------- form ---------- */
.form{display:grid;gap:18px;max-width:560px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:7px}
.field input,.field textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);
  border-radius:12px;font:inherit;background:var(--surface);color:var(--text)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.field textarea{min-height:130px;resize:vertical}

/* ---------- footer ---------- */
.footer{background:var(--ink);color:#fff;padding:64px 0 36px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:46px}
.footer img.flogo{height:30px;margin-bottom:18px}
.footer p{color:var(--text-on-dark);font-size:.95rem;max-width:34ch}
.footer h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.14em;color:var(--accent);margin-bottom:16px}
.footer ul{list-style:none}
.footer li{margin-bottom:10px}
.footer li a{color:var(--text-on-dark);font-size:.95rem}
.footer li a:hover{color:#fff}
.footer-bottom{border-top:1px solid #2f2f2c;padding-top:24px;display:flex;justify-content:space-between;
  color:var(--text-on-dark);font-size:.85rem;flex-wrap:wrap;gap:10px}

/* ---------- misc ---------- */
.note{font-size:.78rem;color:var(--text-muted);font-style:italic;margin-top:18px}
.center{text-align:center}
.mt-s{margin-top:14px}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{max-width:420px}
  .g4,.stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .pillars{grid-template-columns:1fr}
  .logos{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  html,body{overflow-x:hidden;max-width:100vw}
  .container{padding:0 18px}
  .btn{white-space:normal;text-align:center;max-width:100%}
  .nav .container{height:62px;gap:10px}
  .nav-logo{flex:none}
  .nav-logo img{height:22px}
  .nav-links{display:none;position:absolute;top:62px;left:0;right:0;flex-direction:column;
    background:var(--canvas);border-bottom:1px solid var(--line);padding:18px 24px;gap:16px}
  .nav-links.open{display:flex}
  .nav-toggle{display:block;padding:4px}
  .nav-cta{gap:8px;flex:none}
  .nav-cta .btn{padding:9px 13px;font-size:.82rem;white-space:nowrap}
  .langsw{margin-right:0;font-size:.8rem}
  .g2,.g3,.g4,.stats{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .logos{grid-template-columns:repeat(2,1fr)}
  .form .row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer p{max-width:none}
  .nav-cta .btn-secondary{display:none}
  .callout{padding:24px 20px}
  .card{padding:22px 18px}
}

/* ---------- explainer / video frame ---------- */
.videoframe{position:relative;border-radius:var(--radius-lg);overflow:hidden;background:var(--ink);
  box-shadow:var(--shadow);aspect-ratio:16/9;max-width:980px;margin:0 auto}
.videoframe iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.head-center{max-width:60ch;margin:0 auto 36px;text-align:center}
.head-center .eyebrow{justify-content:center}
.head-center h2{margin:14px 0 0}

/* ---------- video play overlay ---------- */
.videoframe .play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(27,27,25,.16);border:0;cursor:pointer;z-index:5;transition:background .2s}
.videoframe .play-overlay:hover{background:rgba(27,27,25,.26)}
.videoframe .play-overlay .pb{width:84px;height:84px;border-radius:50%;background:var(--accent);
  display:flex;align-items:center;justify-content:center;box-shadow:0 10px 30px rgba(0,0,0,.25);transition:transform .2s}
.videoframe .play-overlay:hover .pb{transform:scale(1.06)}
.videoframe .play-overlay .pb svg{width:34px;height:34px;margin-left:5px}

/* ---------- language switch ---------- */
.langsw{font-size:.85rem;font-weight:600;color:var(--text-muted);margin-right:8px;white-space:nowrap}
.langsw a{color:var(--text-muted)}
.langsw a.active{color:var(--ink);font-weight:700}
.langsw a:hover{color:var(--ink)}

/* ---------- buyers logo marquee ---------- */
.buyers{margin-top:104px}
.buyers-title{text-align:center;font-size:.78rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--text-muted);margin-bottom:22px}
.marquee{overflow:hidden;width:100%;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent)}
.marquee-track{display:flex;align-items:center;gap:54px;width:max-content;animation:marq 80s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marq{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.buyer{flex:none;height:40px;display:flex;align-items:center;justify-content:center}
.buyer img{max-height:30px;max-width:118px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.68;transition:.2s}
.buyer img:hover{filter:grayscale(0);opacity:1}
.buyer-name{font-weight:700;color:var(--text-muted);font-size:.95rem;white-space:nowrap}

/* buyers band, icon + name */
.buyer{flex:none;height:40px;display:flex;align-items:center;gap:10px}
.buyer .bfav{width:22px;height:22px;border-radius:5px;object-fit:contain;flex:none;filter:none;opacity:1}
.buyer-name{font-weight:700;color:#55554f;font-size:.97rem;white-space:nowrap}

/* highlighted headline words */
.hl{background:var(--ink);color:var(--accent);padding:.02em .14em;border-radius:.1em;
  box-decoration-break:clone;-webkit-box-decoration-break:clone}




/* hero glyph, real nut tightening (60° ratchet steps) */
@keyframes nut-tighten{0.0%{transform:rotate(0deg)}3.0%{transform:rotate(66deg)}6.0%{transform:rotate(60deg)}16.66%{transform:rotate(60deg)}16.67%{transform:rotate(60deg)}19.67%{transform:rotate(126deg)}22.67%{transform:rotate(120deg)}33.32%{transform:rotate(120deg)}33.33%{transform:rotate(120deg)}36.33%{transform:rotate(186deg)}39.33%{transform:rotate(180deg)}49.99%{transform:rotate(180deg)}50.0%{transform:rotate(180deg)}53.0%{transform:rotate(246deg)}56.0%{transform:rotate(240deg)}66.66%{transform:rotate(240deg)}66.67%{transform:rotate(240deg)}69.67%{transform:rotate(306deg)}72.67%{transform:rotate(300deg)}83.32%{transform:rotate(300deg)}83.33%{transform:rotate(300deg)}86.33%{transform:rotate(366deg)}89.33%{transform:rotate(360deg)}99.99%{transform:rotate(360deg)}100%{transform:rotate(360deg)}}
.hero-visual .hero-glyph{animation:nut-tighten 7.5s linear infinite;transform-origin:50% 50%;will-change:transform}
@media (prefers-reduced-motion: reduce){.hero-visual .hero-glyph{animation:none}}