/* ============================================================
   16Fold — Swiss International design system
   One shared stylesheet for the whole site (index + enterprise).
   Direction: swiss-international (Ghost Design Pack)
   Tokens: Inter only · #111 ink · cobalt #1D3FBF accent (<10%)
   ============================================================ */

:root{
  --paper:#FFFFFF; --ground:#F2F2F0; --ink:#111111;
  --g1:#555555; --g2:#999999; --g3:#DDDDDD;
  --accent:#1D3FBF;
  --f:'Inter',sans-serif;
  --pad:clamp(72px,11vw,140px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--f);background:var(--paper);color:var(--ink);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;font-feature-settings:"tnum"}
.wrap{max-width:1120px;margin:0 auto;padding:0 32px}
h1,h2,h3,h4{font-weight:700;letter-spacing:-0.02em;line-height:1.05}
p{color:var(--g1)}
a{color:inherit;text-decoration:none}
.lbl{font-size:12px;font-weight:500;letter-spacing:0.14em;text-transform:uppercase;color:var(--g2)}
.num{font-variant-numeric:tabular-nums}
.fine{color:var(--g2);font-size:14px}
.pad-top-note{margin-top:18px}

/* buttons */
.btn{display:inline-block;font-size:15px;font-weight:500;padding:13px 22px;border-radius:2px;border:1px solid var(--ink);transition:.15s}
.btn:hover{background:var(--ink);color:#fff}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(1.08);background:var(--accent);color:#fff}

/* nav */
nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--g3)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{font-weight:700;letter-spacing:-0.02em;font-size:19px}
.nav-links{display:flex;gap:30px;font-size:14px;color:var(--g1)}
.nav-links a:hover{color:var(--ink)}
.nav-cta{font-size:14px;font-weight:500;color:var(--accent)}
@media(max-width:880px){.nav-links{display:none}}

/* section + heads */
section{padding:var(--pad) 0;border-top:1px solid var(--g3)}
.head .lbl{margin-bottom:18px}
.head h2{font-size:clamp(28px,4vw,42px);max-width:22ch}
.head p.sub{margin-top:18px;max-width:56ch;font-size:18px}

/* generic columns */
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.cols-3 > div{background:var(--paper);padding:34px 30px}
.cols-2{display:grid;grid-template-columns:repeat(2,1fr);gap:48px;margin-top:56px}
@media(max-width:780px){.cols-3{grid-template-columns:1fr}.cols-2{grid-template-columns:1fr;gap:32px}}

/* four-answers strip */
.answers{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.answers > div{background:var(--paper);padding:30px 26px}
.answers .q{font-size:13px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.answers p{font-size:15px;color:var(--ink)}
@media(max-width:880px){.answers{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.answers{grid-template-columns:1fr}}

/* hero (shared) */
.hero{padding:clamp(64px,9vw,104px) 0 0;border-top:none}
.hero .lbl{margin-bottom:18px}
.hero-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(38px,6vw,68px);max-width:15ch;margin-top:24px}
.hero p.sub{margin-top:26px;max-width:50ch;font-size:19px}
.hero .cta{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap}
.hero .fine{margin-top:18px;font-size:14px;color:var(--g2)}
.setpiece{text-align:right}
.setpiece .big{font-size:clamp(140px,20vw,230px);font-weight:700;letter-spacing:-0.05em;line-height:0.8}
.setpiece .cap{margin-top:14px}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr}.setpiece{display:none}}

/* hero tagline lockup */
.tagline-lockup{margin-top:22px;font-size:18px;font-weight:700;letter-spacing:-0.01em;color:var(--ink)}

/* readout strip */
.readout{margin-top:48px;border:1px solid var(--g3);display:grid;grid-template-columns:repeat(4,1fr)}
.readout > div{padding:22px 24px;border-right:1px solid var(--g3)}
.readout > div:last-child{border-right:none}
.readout .v{font-size:30px;font-weight:700;letter-spacing:-0.03em}
.readout .k{font-size:13px;color:var(--g1);margin-top:6px}
.readout .readout-note{grid-column:1/-1;border-right:none;border-top:1px solid var(--g3);padding:14px 24px;font-size:13px;color:var(--g2);font-style:italic}
@media(max-width:780px){.readout{grid-template-columns:repeat(2,1fr)}.readout > div:nth-child(2){border-right:none}.readout .readout-note{grid-column:1/-1}}

/* chatbot-contrast table */
.compare{margin-top:56px;border:1px solid var(--g3)}
.compare-head,.compare-row{display:grid;grid-template-columns:1fr 1.4fr 1.4fr}
.compare-head{border-bottom:1px solid var(--ink)}
.compare-head > div{padding:18px 22px}
.compare-head .ch{font-size:13px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase}
.compare-head .ch-them{color:var(--g2)}
.compare-head .ch-us{color:var(--accent)}
.compare-row{border-top:1px solid var(--g3)}
.compare-row:first-of-type{border-top:none}
.compare-row > div{padding:18px 22px}
.compare-row .cl{font-size:14px;font-weight:500;color:var(--g1);letter-spacing:-0.01em}
.compare-row .cv{font-size:15px;color:var(--g1)}
.compare-row .cv-us{color:var(--ink)}
@media(max-width:780px){
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;border-top:1px solid var(--ink);padding:6px 0}
  .compare-row > div{padding:10px 22px}
  .compare-row .cl{font-weight:700;color:var(--ink);font-size:15px;padding-bottom:4px}
  .compare-row .cv:before{content:"Chatbot: ";font-weight:500;color:var(--g2)}
  .compare-row .cv-us:before{content:"16Fold: ";font-weight:500;color:var(--accent)}
}

/* feature rows */
.feat h3{font-size:22px;margin-bottom:10px}
.feat .tags{margin-top:14px;font-size:13px;color:var(--g2)}
.feat .tags span{margin-right:14px}

/* industries */
.ind{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.ind > div{background:var(--paper);padding:30px 28px}
.ind h4{font-size:18px;margin-bottom:8px}
.ind p{font-size:15px}
@media(max-width:780px){.ind{grid-template-columns:1fr}}

/* team grid */
.team{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.team > div{background:var(--paper);padding:22px 20px}
.team .role{font-size:11px;font-weight:500;letter-spacing:0.12em;text-transform:uppercase;color:var(--g2)}
.team .name{font-size:19px;font-weight:700;margin:8px 0 6px;letter-spacing:-0.02em}
.team .name .soon{font-size:11px;font-weight:500;letter-spacing:0.08em;color:var(--accent);vertical-align:middle;margin-left:6px}
.team .desc{font-size:13px;color:var(--g1);line-height:1.45}
@media(max-width:880px){.team{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.team{grid-template-columns:1fr}}

/* board */
.board > div .q{font-size:15px;color:var(--ink);margin-top:10px}

/* real results (index) */
.results{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin-top:56px}
.results .n{font-size:clamp(44px,6vw,62px);font-weight:700;letter-spacing:-0.04em;line-height:0.9}
.results .n .u{font-size:24px}
.results .who{font-size:13px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--g2);margin:14px 0 10px}
.results p{font-size:15px}
@media(max-width:780px){.results{grid-template-columns:1fr;gap:36px}}

/* pricing */
.price{margin-top:56px;border:1px solid var(--ink);display:grid;grid-template-columns:1.1fr 1fr}
.price .main{padding:40px 36px}
.price .amt{font-size:56px;font-weight:700;letter-spacing:-0.04em}
.price .amt span{font-size:18px;color:var(--g1);font-weight:500}
.price ul{list-style:none;margin-top:24px}
.price li{padding:9px 0;border-top:1px solid var(--g3);font-size:15px;color:var(--ink);display:flex;gap:10px}
.price li:before{content:"—";color:var(--accent)}
.price .add{padding:40px 36px;border-left:1px solid var(--g3);background:var(--ground)}
.price .add h4{font-size:16px;margin-bottom:18px}
.price .add .row{display:flex;justify-content:space-between;padding:11px 0;border-top:1px solid var(--g3);font-size:14px}
.price .add .row b{font-weight:700}
@media(max-width:780px){.price{grid-template-columns:1fr}.price .add{border-left:none;border-top:1px solid var(--g3)}}

/* the math */
.math{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.math > div{background:var(--paper);padding:26px 22px}
.math.featured > div:last-child{background:var(--ground)}
.math h4{font-size:16px;margin-bottom:6px}
.math .c{font-size:22px;font-weight:700;letter-spacing:-0.02em;margin:6px 0 10px}
.math p{font-size:13px}
@media(max-width:780px){.math{grid-template-columns:1fr}}

/* faq */
.faq{margin-top:48px;border-top:1px solid var(--g3)}
.faq details{border-bottom:1px solid var(--g3);padding:20px 0}
.faq summary{font-size:18px;font-weight:700;letter-spacing:-0.01em;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--accent);font-weight:500}
.faq details[open] summary:after{content:"–"}
.faq p{margin-top:14px;max-width:70ch;font-size:16px}

/* audit form */
.audit{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:56px;align-items:start}
.audit form{display:flex;flex-direction:column;gap:14px}
.audit input{font-family:var(--f);font-size:16px;padding:14px 16px;border:1px solid var(--g2);border-radius:2px;background:var(--paper);color:var(--ink)}
.audit input:focus{outline:none;border-color:var(--accent)}
.audit .btn-primary{margin-top:6px;text-align:center;cursor:pointer;border:none}
.audit .fine{font-size:13px;color:var(--g2);margin-top:6px}
@media(max-width:780px){.audit{grid-template-columns:1fr}}

/* enterprise: stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.stats > div{background:var(--paper);padding:34px 30px}
.stats .n{font-size:clamp(40px,5vw,54px);font-weight:700;letter-spacing:-0.04em;line-height:0.9}
.stats .n .u{font-size:20px}
.stats .l{font-size:14px;color:var(--g1);margin-top:12px}

/* enterprise: built-for-teams grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.grid > div{background:var(--paper);padding:30px 28px}
.grid .idx{font-size:13px;font-weight:500;color:var(--accent)}
.grid h3{font-size:18px;margin:12px 0 8px}
.grid p{font-size:15px}

/* enterprise: building model */
.model{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--g3);border:1px solid var(--g3);margin-top:56px}
.model > div{background:var(--paper);padding:30px 28px}
.model .tag{font-size:12px;font-weight:500;letter-spacing:0.12em;text-transform:uppercase;color:var(--g2)}
.model h3{font-size:19px;margin:12px 0 8px}
.model p{font-size:15px}

/* enterprise: quotes */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;margin-top:56px}
.quotes .n{font-size:clamp(36px,5vw,48px);font-weight:700;letter-spacing:-0.04em;line-height:0.9}
.quotes .who{font-size:13px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--g2);margin:12px 0 10px}
.quotes p{font-size:15px;color:var(--ink)}
@media(max-width:780px){.stats,.grid,.model{grid-template-columns:1fr}.quotes{grid-template-columns:1fr;gap:32px}}

/* closing band + footer */
.close{padding:var(--pad) 0;border-top:1px solid var(--g3)}
.close h2{font-size:clamp(28px,4vw,40px);max-width:18ch}
.close .cta{margin-top:28px}
footer{border-top:1px solid var(--ink);padding:44px 0;font-size:14px;color:var(--g1)}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}

/* ── Sticky demo CTA (instrumentation) — Swiss: hairline border, cobalt, radius 2px, no shadow/gradient/emoji ── */
.x16-sticky{position:fixed;left:0;right:0;bottom:0;z-index:30;display:none;align-items:center;gap:16px;
  background:var(--paper);border-top:1px solid var(--ink);padding:12px 32px;
  transform:translateY(100%);transition:transform .18s ease}
.x16-sticky.is-visible{display:flex;transform:translateY(0)}
.x16-sticky-msg{font-size:14px;font-weight:500;color:var(--ink);letter-spacing:-0.01em;margin-right:auto}
.x16-sticky-cta{display:inline-block;font-size:14px;font-weight:500;padding:10px 18px;border-radius:2px;
  background:var(--accent);border:1px solid var(--accent);color:#fff;transition:.15s;cursor:pointer}
.x16-sticky-cta:hover{filter:brightness(1.08)}
.x16-sticky-cta:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.x16-sticky-x{background:none;border:none;font-size:22px;line-height:1;color:var(--g2);cursor:pointer;padding:4px 6px}
.x16-sticky-x:hover{color:var(--ink)}
.x16-sticky-x:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
@media(max-width:560px){
  .x16-sticky{padding:10px 20px;gap:10px}
  .x16-sticky-msg{display:none}            /* don't crowd / cover content on mobile */
  .x16-sticky-cta{flex:1;text-align:center}
}