/* Functor v3 design system — marketing site.
 * Calm and editorial: serif display (Instrument Serif), clean sans (Inter),
 * monospace only for numbers (IBM Plex Mono). Dark and light sections,
 * one accent: Functor amber. Free fonts; no build step. */

:root{
  --bg:#0b0c0b;            /* dark section background */
  --bg2:#111311;           /* raised dark surface */
  --line:rgba(255,255,255,.09);
  --ink:#f3f1ec;           /* text on dark */
  --muted:#a4a39c;         /* secondary text on dark */
  --paper:#f3f1ec;         /* light section background */
  --paper2:#e9e6df;        /* raised light surface */
  --ink-d:#151514;         /* text on light */
  --muted-d:#5f5e58;       /* secondary text on light */
  --line-d:rgba(0,0,0,.1);
  --amber:#ffb020;
  --amber-d:#b97a00;       /* amber for text on light (contrast) */
  --up:#3ecf8e; --down:#ff6b6b;
  --serif:"Instrument Serif",Georgia,serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --wrap:1180px;
  --r:14px;                /* card radius */
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(18px,4vw,40px)}
.num,.mono{font-family:var(--mono);font-feature-settings:"tnum"}
.amber{color:var(--amber)}

/* ---------- type ---------- */
.display{font-family:var(--serif);font-weight:400;letter-spacing:-.01em;line-height:1.02}
h1.display{font-size:clamp(3rem,8.6vw,7rem)}
h2.display{font-size:clamp(2.2rem,5vw,4rem)}
h3{font-size:1.15rem;font-weight:500;letter-spacing:-.005em}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--muted);max-width:60ch;line-height:1.55}
.eyebrow{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:500}
.light .lead,.light .eyebrow{color:var(--muted-d)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;font-size:.95rem;font-weight:500;border:1px solid var(--line);color:var(--ink);transition:background .18s,border-color .18s,color .18s,transform .18s;cursor:pointer;background:transparent}
.btn:hover{border-color:rgba(255,255,255,.3)}
.btn--amber{background:var(--amber);border-color:var(--amber);color:#111}
.btn--amber:hover{background:#ffc04d;border-color:#ffc04d}
.light .btn{border-color:var(--line-d);color:var(--ink-d)}
.light .btn:hover{border-color:rgba(0,0,0,.35)}
.light .btn--amber{color:#111}
.btns{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;transition:background .25s,border-color .25s,backdrop-filter .25s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(11,12,11,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:var(--line)}
.nav__in{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:.06em;font-size:.95rem}
.brand svg{width:30px;height:25px}
.nav__links{display:flex;gap:26px;margin-left:12px}
.nav__links a{font-size:.93rem;color:var(--muted);transition:color .15s}
.nav__links a:hover,.nav__links a.on{color:var(--ink)}
.nav__cta{margin-left:auto;display:flex;gap:10px}
.nav__cta .btn{height:38px;padding:0 16px;font-size:.88rem}
.burger{display:none;margin-left:auto;background:none;border:0;color:var(--ink);font-size:1.4rem;cursor:pointer}
@media (max-width:900px){
  .nav__links,.nav__cta{display:none}
  .burger{display:block}
  .nav.open .nav__links{display:flex;flex-direction:column;position:absolute;top:68px;left:0;right:0;background:var(--bg);padding:18px clamp(18px,4vw,40px) 24px;gap:16px;border-bottom:1px solid var(--line);margin:0}
  .nav.open .nav__cta{display:flex;position:absolute;top:calc(68px + 190px);left:clamp(18px,4vw,40px)}
}

/* ---------- sections ---------- */
.sec{padding:clamp(80px,11vw,150px) 0}
.sec--tight{padding:clamp(56px,7vw,90px) 0}
.light{background:var(--paper);color:var(--ink-d)}
.head{display:flex;justify-content:space-between;align-items:end;gap:30px;flex-wrap:wrap;margin-bottom:clamp(36px,5vw,64px)}
.head .lead{max-width:44ch}

/* hero */
.hero{position:relative;overflow:hidden;padding:clamp(90px,14vw,180px) 0 clamp(70px,9vw,120px)}
.hero__glow{position:absolute;inset:-20% -10% auto auto;width:70vw;height:70vw;max-width:980px;max-height:980px;background:radial-gradient(closest-side,rgba(255,176,32,.13),transparent 70%);pointer-events:none}
.hero h1{max-width:14ch}
.hero .lead{margin-top:28px}
.hero .btns{margin-top:40px}
.pill{display:inline-flex;align-items:center;gap:10px;font-size:.82rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:7px 14px;margin-bottom:30px}
.pill i{width:7px;height:7px;border-radius:50%;background:var(--amber);box-shadow:0 0 10px var(--amber)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:32px 0 30px;border-right:1px solid var(--line);padding-left:clamp(0px,2vw,26px)}
.stat:first-child{padding-left:0}
.stat:last-child{border-right:0}
.stat .v{font-family:var(--serif);font-size:clamp(2rem,3.6vw,3rem);line-height:1}
.stat .k{font-size:.82rem;color:var(--muted);margin-top:10px}
@media (max-width:820px){.stats{grid-template-columns:1fr 1fr}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.stat:nth-child(3){padding-left:0}}

/* markets strip */
.mkts{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line-d);border:1px solid var(--line-d);border-radius:var(--r);overflow:hidden}
.mkt{background:var(--paper);padding:18px 18px 16px}
.mkt .s{font-weight:600;font-size:.95rem}
.mkt .p{font-family:var(--mono);font-size:1.02rem;margin-top:8px}
.mkt .c{font-family:var(--mono);font-size:.82rem;margin-top:2px}
.up{color:#138a57}.down{color:#c23b3b}
.dark .up,.bg-dark .up{color:var(--up)}
@media (max-width:900px){.mkts{grid-template-columns:repeat(3,1fr)}}
@media (max-width:520px){.mkts{grid-template-columns:repeat(2,1fr)}}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cards--2{grid-template-columns:repeat(2,1fr)}
.card{border:1px solid var(--line);border-radius:var(--r);padding:28px;background:var(--bg2);display:flex;flex-direction:column;gap:12px;transition:border-color .2s,transform .2s}
a.card:hover{border-color:rgba(255,176,32,.45);transform:translateY(-2px)}
.card p{color:var(--muted);font-size:.95rem}
.card .go{margin-top:auto;padding-top:10px;font-size:.9rem;color:var(--amber)}
.light .card{background:#fbfaf7;border-color:var(--line-d)}
.light .card p{color:var(--muted-d)}
.light .card .go{color:var(--amber-d)}
.tag{align-self:flex-start;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:4px 10px;border:1px solid currentColor}
.tag--live{color:#138a57}.tag--dev{color:var(--amber-d)}.tag--plan{color:var(--muted-d)}
.dark-tags .tag--live{color:var(--up)}.dark-tags .tag--dev{color:var(--amber)}.dark-tags .tag--plan{color:var(--muted)}
@media (max-width:900px){.cards,.cards--2{grid-template-columns:1fr}}

/* numbered points (01 02 03) */
.points{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,40px)}
.points--3{grid-template-columns:repeat(3,1fr)}
.point .n{font-family:var(--mono);font-size:.85rem;color:var(--amber)}
.light .point .n{color:var(--amber-d)}
.point h3{margin:14px 0 10px;font-size:1.2rem}
.point p{color:var(--muted);font-size:.95rem}
.light .point p{color:var(--muted-d)}
@media (max-width:900px){.points,.points--3{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.points,.points--3{grid-template-columns:1fr}}

/* split: text + list */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,90px);align-items:start}
.list{list-style:none;display:grid;gap:18px}
.list li{padding-left:22px;position:relative;color:var(--muted)}
.list li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--amber)}
.list li b{color:var(--ink);font-weight:500}
.light .list li{color:var(--muted-d)}.light .list li b{color:var(--ink-d)}
@media (max-width:900px){.split{grid-template-columns:1fr}}

/* table */
.tbl{width:100%;border-collapse:collapse;font-size:.95rem}
.tbl th{text-align:left;font-weight:500;color:var(--muted-d);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;padding:12px 14px;border-bottom:1px solid var(--line-d)}
.tbl td{padding:15px 14px;border-bottom:1px solid var(--line-d);vertical-align:top}
.tblwrap{overflow-x:auto;border:1px solid var(--line-d);border-radius:var(--r);background:#fbfaf7}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:22px 0}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-size:1.12rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--amber);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq p{color:var(--muted);margin-top:14px;max-width:72ch}

/* CTA band */
.cta{text-align:center}
.cta .btns{justify-content:center;margin-top:34px}
.note{font-size:.84rem;color:var(--muted);margin-top:18px}
.light .note{color:var(--muted-d)}

/* footer */
.foot{border-top:1px solid var(--line);padding:56px 0 40px;font-size:.9rem;color:var(--muted)}
.foot__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}
.foot h4{color:var(--ink);font-weight:500;font-size:.9rem;margin-bottom:14px}
.foot ul{list-style:none;display:grid;gap:9px}
.foot a:hover{color:var(--ink)}
.foot__legal{margin-top:44px;font-size:.8rem;color:#77766f}
@media (max-width:760px){.foot__grid{grid-template-columns:1fr 1fr}}

/* reveal on scroll */
.rv{opacity:0;transform:translateY(16px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* exit-intent (once per session) */
.exit{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:100;padding:20px}
.exit.open{display:flex}
.exit__box{background:var(--paper);color:var(--ink-d);border-radius:18px;max-width:440px;padding:34px;position:relative}
.exit__box h3{font-family:var(--serif);font-size:2rem;font-weight:400;line-height:1.1}
.exit__box p{color:var(--muted-d);margin:12px 0 22px}
.exit__x{position:absolute;top:14px;right:16px;background:none;border:0;font-size:1.2rem;cursor:pointer;color:var(--muted-d)}

/* ---- hero visual: simulated price paths ---- */
.hero__viz{position:absolute;top:0;right:0;bottom:0;width:52%;z-index:0;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 18%);mask-image:linear-gradient(90deg,transparent 0,#000 18%)}
.hero__viz canvas{width:100%;height:100%;display:block}
.hero__cap{position:absolute;right:clamp(18px,4vw,40px);bottom:18px;z-index:1;font-family:var(--mono);font-size:11px;letter-spacing:.04em;color:var(--muted);opacity:.7}
@media (max-width:900px){.hero__viz,.hero__cap{display:none}}

/* ---- refinements ---- */
.card{position:relative}
.card::after{content:"";position:absolute;inset:-1px;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .25s;
  background:linear-gradient(135deg,rgba(255,176,32,.55),transparent 40%,transparent 60%,rgba(255,176,32,.25)) border-box;
  -webkit-mask:linear-gradient(#000 0 0) padding-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;border:1px solid transparent}
.card:hover::after{opacity:1}
.card:hover{transform:translateY(-3px)}
.eyebrow{display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:18px;height:1px;background:currentColor;opacity:.6}

/* ---- Quantum Core (the post-quantum project) link: its own cyan, used sparingly ---- */
:root{--q:#45f7ff}
.nav__links a.q{color:var(--q)}
.nav__links a.q:hover{color:#8ffcff}
.btn--q{border-color:rgba(69,247,255,.45);color:var(--q);background:rgba(69,247,255,.07)}
.btn--q:hover{border-color:var(--q);background:rgba(69,247,255,.14);color:#c9feff}
.card--q{border-color:rgba(69,247,255,.28)}
.card--q .go{color:var(--q)}
.card--q .tag{border-color:rgba(69,247,255,.4);color:var(--q)}
.light .card--q .tag{color:#0f7c86;border-color:rgba(15,124,134,.4)}
.cards--4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1000px){.cards--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.cards,.cards--2,.cards--3,.cards--4{grid-template-columns:1fr}}

/* ---- Foundation strip on the home page ---- */
.fdn{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,56px);align-items:center}
@media (max-width:860px){.fdn{grid-template-columns:1fr}}
.fdn img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r);border:1px solid var(--line-d);filter:saturate(.82)}
.fdn figcaption{margin-top:10px;font-family:var(--mono);font-size:.78rem;color:var(--muted-d)}
.fdn .go{color:var(--amber-d)}