/* ═══════════════════════════════════════════════════════════════
   Fed.tech — design system
   Monochrome only. See docs/design/README.md for the rules.
   ═══════════════════════════════════════════════════════════════ */

:root{
  --bg:#000; --fg:#fff; --tile:#fff; --ink:#000;
  --line:#1f1f1f; --line2:#2e2e2e; --dim:#8a8a8a; --dim2:#5c5c5c;
  --on-inv:#555;
  --r:26px; --r2:18px; --gap:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1420px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{color-scheme:dark;scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);
     font-family:"Inter Tight",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
     -webkit-font-smoothing:antialiased;letter-spacing:-.011em;overflow-x:hidden}
.mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
h1,h2,h3{font-weight:500;letter-spacing:-.04em;line-height:1.02}
a{text-decoration:none;color:inherit}
img,svg{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.lbl{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--dim2);font-weight:500}
.skip{position:absolute;left:-9999px;top:0;background:#fff;color:#000;padding:12px 20px;z-index:200;
      border-radius:0 0 var(--r2) 0}
.skip:focus{left:0}
:focus-visible{outline:2px solid #fff;outline-offset:3px}

/* ══ THE INVERSION RULE ════════════════════════════════════════
   Every hoverable surface carries .inv. Nothing defines its own
   hover colours. Text inside must use .muted or .faint.        */
.inv{transition:background .45s var(--ease),color .45s var(--ease),border-color .45s var(--ease)}
.inv:hover{background:var(--tile);border-color:var(--tile);color:var(--ink)}
.inv:hover .muted{color:var(--on-inv)}
.inv:hover .faint{color:var(--on-inv);opacity:.7}
.t-white.inv:hover{background:#0b0b0b;border-color:var(--line2);color:#fff}
.t-white.inv:hover .muted{color:var(--dim)}
.t-white.inv:hover .faint{color:var(--dim2);opacity:1}
.muted{color:var(--dim);transition:color .45s var(--ease)}
.faint{color:var(--dim2);transition:color .45s var(--ease),opacity .45s}

/* ── nav ───────────────────────────────────────────────────── */
nav{position:sticky;top:0;z-index:60;padding:18px 0;background:linear-gradient(#000 62%,transparent)}
.navbar{display:flex;align-items:center;border:1px solid var(--line2);border-radius:999px;
        padding:9px 9px 9px 24px;backdrop-filter:blur(14px);background:rgba(0,0,0,.72)}
.logo{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:600;letter-spacing:-.03em}
.logomark{display:flex;gap:3px}
.logomark i{width:11px;height:11px;border-radius:50%;background:#fff;display:block;
            transition:transform .45s var(--ease)}
.logo:hover .logomark i:first-child{transform:translateX(3px)}
.logo:hover .logomark i:last-child{transform:translateX(-3px)}
.navlinks{display:flex;gap:4px;margin:0 auto}
.navlinks a{font-size:13.5px;color:var(--dim);padding:9px 16px;border-radius:999px;
            transition:color .25s,background .25s}
.navlinks a:hover,.navlinks a[aria-current=page]{color:#fff;background:#141414}
.getintouch{display:flex;align-items:center;gap:12px;border:1px solid var(--line2);border-radius:999px;
            padding:10px 10px 10px 20px;font-size:13.5px;white-space:nowrap;
            transition:background .3s,color .3s,border-color .3s}
.getintouch .arw{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
                 background:#fff;color:#000;transition:transform .45s var(--ease)}
.getintouch:hover{background:#fff;color:#000;border-color:#fff}
.getintouch:hover .arw{background:#000;color:#fff;transform:rotate(45deg)}
.getintouch svg{width:13px;height:13px}
.navtoggle{display:none;background:none;border:1px solid var(--line2);border-radius:999px;
           color:#fff;padding:9px 16px;font:inherit;font-size:13.5px;cursor:pointer}

/* ── bento ─────────────────────────────────────────────────── */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap);margin-top:8px}
.bento.platform{grid-auto-rows:minmax(258px,auto)}
.tile{border-radius:var(--r);position:relative;overflow:hidden}
.t-white{background:var(--tile);color:var(--ink)}
.t-dark{background:#0b0b0b;border:1px solid var(--line);color:#fff}

/* ── home hero ─────────────────────────────────────────────── */
.hero{padding:4px 0 26px}
.hcard{grid-column:span 7;grid-row:span 2;padding:68px 64px 60px;display:flex;flex-direction:column;
       justify-content:space-between;min-height:430px}
.hcard h1{font-size:clamp(38px,4.35vw,64px)}
.hcard h1 span{color:#9b9b9b;transition:color .5s var(--ease)}
.hcard:hover h1 span{color:#000}
.node{grid-column:span 3;padding:26px 26px 30px;display:flex;flex-direction:column;
      justify-content:space-between;min-height:208px}
.node .glyph{font-size:22px;line-height:1;transition:transform .55s var(--ease)}
.node:hover .glyph{transform:rotate(90deg)}
.node h3{font-size:19px;margin-bottom:9px}
.node p{font-size:13.5px;line-height:1.5}
.arwtile{grid-column:span 2;min-height:208px;display:grid;place-items:center;padding:20px}
.arwtile .arw-ic{width:46px;height:46px;grid-area:1/1;transition:transform .55s var(--ease),opacity .4s}
.arwtile .arw-msg{grid-area:1/1;font-size:12.5px;line-height:1.45;text-align:center;max-width:152px;
                  opacity:0;transform:translateY(8px);
                  transition:opacity .45s .08s,transform .5s .08s var(--ease)}
.arwtile:hover .arw-ic{transform:translateY(-36px) rotate(45deg) scale(.56);opacity:.45}
.arwtile:hover .arw-msg{opacity:1;transform:translateY(20px)}
.sphere{grid-column:span 2;min-height:208px;padding:0}
.sphere canvas{width:100%;height:100%;display:block;cursor:crosshair}
.hsub{grid-column:span 5;padding:30px 36px 34px;display:flex;flex-direction:column;
      justify-content:flex-end;border:1px solid var(--line);border-radius:var(--r)}
.hsub p{font-size:15.5px;line-height:1.62;max-width:450px}
.disc{display:inline-flex;align-items:center;gap:10px;margin-top:26px;font-size:14.5px;
      border-bottom:1px solid #333;padding-bottom:7px;width:fit-content;
      transition:border-color .3s,gap .35s var(--ease)}
.disc:hover{border-color:#fff;gap:16px}

/* ── page hero (inner pages) ───────────────────────────────── */
.phero{padding:70px 0 20px}
.phero .eyebrow{display:block;margin-bottom:22px}
.phero h1{font-size:clamp(38px,5.2vw,78px);max-width:16ch}
.phero .sub{font-size:clamp(16px,1.35vw,19px);line-height:1.6;max-width:620px;margin-top:26px}
.crumb{display:flex;gap:10px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;
       color:var(--dim2);margin-bottom:26px}
.crumb a:hover{color:#fff}

/* ── marquee ───────────────────────────────────────────────── */
.prov{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0;
      margin-top:34px;overflow:hidden}
.provhead{display:flex;justify-content:center;margin-bottom:20px}
.mtrack{display:flex;gap:60px;width:max-content;animation:scroll 38s linear infinite}
.prov:hover .mtrack{animation-play-state:paused}
@keyframes scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.mitem{font-size:20px;font-weight:500;color:#565656;white-space:nowrap;letter-spacing:-.03em;
       transition:color .3s}
.mitem:hover{color:#fff}

/* ── sections ──────────────────────────────────────────────── */
section{padding:104px 0}
section.tight{padding-top:0}
.shead{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;
       margin-bottom:34px;flex-wrap:wrap}
.shead h2{font-size:clamp(30px,3.3vw,48px);max-width:720px}
.shead p{font-size:15px;max-width:340px;line-height:1.6}

/* ── platform cards ────────────────────────────────────────── */
.pcard{display:flex;flex-direction:column;padding:28px;min-height:250px}
.pcard.big{grid-column:span 6;grid-row:span 2;min-height:510px;padding:38px}
.pcard.sm{grid-column:span 3}
.pcard.half{grid-column:span 6;min-height:300px;padding:34px}
.ptop{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.pidx{font-size:11px;letter-spacing:.14em}
.ptag{font-size:10px;letter-spacing:.16em;text-transform:uppercase;border:1px solid currentColor;
      border-radius:999px;padding:4px 10px;opacity:.5}
.pcard h3{font-size:24px;margin-top:auto;padding-top:28px}
.pcard.big h3{font-size:42px}
.pexp{font-size:11.5px;letter-spacing:.11em;text-transform:uppercase;margin-top:11px}
.pline{font-size:14px;line-height:1.55;margin-top:12px;max-width:470px}
.pcard.big .pline{font-size:16.5px;margin-top:16px}
.pmore{max-height:0;opacity:0;overflow:hidden;
       transition:max-height .5s var(--ease),opacity .4s,margin-top .5s var(--ease)}
.pcard:hover .pmore{max-height:220px;opacity:1;margin-top:18px}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.chips li{font-size:11px;border:1px solid currentColor;opacity:.5;border-radius:999px;padding:5px 11px}
.pfoot{display:flex;align-items:center;justify-content:space-between;margin-top:22px;
       border-top:1px solid currentColor;padding-top:16px}
.pfoot .st{font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;opacity:.6}
.go{width:30px;height:30px;border-radius:50%;border:1px solid currentColor;display:grid;
    place-items:center;opacity:.55;transition:transform .5s var(--ease),opacity .3s}
.pcard:hover .go{transform:rotate(45deg);opacity:1}
.pfoot svg{width:12px;height:12px}

/* ── capability tiles ──────────────────────────────────────── */
.caps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.cap{border:1px solid var(--line);border-radius:var(--r2);padding:22px;min-height:136px;
     display:flex;flex-direction:column}
.cap .cn{font-size:10.5px}
.cap h4{font-size:15.5px;font-weight:500;letter-spacing:-.025em;margin-top:auto;padding-top:22px}
.cmore{max-height:0;opacity:0;overflow:hidden;
       transition:max-height .45s var(--ease),opacity .35s,margin-top .45s var(--ease)}
.cap:hover .cmore{max-height:150px;opacity:1;margin-top:14px}
.cmore p{font-size:12.5px;line-height:1.5;margin-bottom:11px}

/* ── generic grid cards ────────────────────────────────────── */
.cardgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(248px,1fr));gap:var(--gap)}
.card{border:1px solid var(--line);border-radius:var(--r2);padding:26px}
.card h4{font-size:16px;font-weight:500;margin-bottom:10px}
.card p{font-size:13.5px;line-height:1.58}
.card .cn{font-size:10.5px;display:block;margin-bottom:16px}

/* ── showcase render ───────────────────────────────────────── */
.shot{border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;background:#060606}
.shotbar{height:42px;background:#0d0d0d;border-bottom:1px solid var(--line);display:flex;
         align-items:center;gap:9px;padding:0 16px}
.shotbar i{width:9px;height:9px;border-radius:50%;background:#2a2a2a;display:block}
.shotbar span{margin-left:8px;font-size:11.5px;color:var(--dim2)}
.shot img{width:100%;display:block}
.shotnote{font-size:12px;color:var(--dim2);margin-top:14px;line-height:1.55;max-width:760px}

/* ── special projects ──────────────────────────────────────── */
.special{border:1px solid var(--line2);border-radius:var(--r);padding:46px 44px;
         background:repeating-linear-gradient(135deg,#070707 0 14px,#0b0b0b 14px 28px)}
.specialhead{display:flex;justify-content:space-between;align-items:center;gap:20px;
             flex-wrap:wrap;margin-bottom:26px}
.special h2{font-size:clamp(28px,3vw,42px);margin-bottom:18px}
.special > p{font-size:15.5px;line-height:1.62;max-width:620px}
.redgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:38px}
.redcard{border:1px solid var(--line);border-radius:var(--r2);padding:24px;background:#060606;
         transition:border-color .4s var(--ease)}
.redcard:hover{border-color:var(--line2)}
.redcard h4{margin:18px 0 12px}
.redcard p{display:flex;flex-direction:column;gap:7px}
.rd{display:inline-block;height:13px;background:#fff;border-radius:2px;
    color:transparent;user-select:none;opacity:.86;transition:opacity .4s var(--ease)}
.redcard h4 .rd{height:19px}
.redcard:hover .rd{opacity:1}
.redfoot{margin-top:22px;padding-top:14px;border-top:1px solid var(--line);
         font-size:10px;letter-spacing:.2em;color:var(--dim2)}

/* ── status banner ─────────────────────────────────────────── */
.statusbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;border:1px solid var(--line2);
           border-radius:var(--r2);padding:18px 24px;margin-top:30px}
.statusbar .dot{width:7px;height:7px;border-radius:50%;background:#fff;flex:none}
.statusbar strong{font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:500}
.statusbar p{font-size:13.5px;line-height:1.55}

/* ── spec table ────────────────────────────────────────────── */
.spec{width:100%;border-collapse:collapse;font-size:14px}
.spec th{text-align:left;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
         color:var(--dim2);font-weight:500;padding:0 20px 14px 0;border-bottom:1px solid var(--line)}
.spec td{padding:17px 20px 17px 0;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.55}
.spec td:first-child{width:30%;font-weight:500}
.spec tr:last-child td{border-bottom:0}

/* ── superintelligence ─────────────────────────────────────── */
.siwrap{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.sibig{grid-column:span 5;padding:44px 40px;display:flex;flex-direction:column;
       justify-content:space-between;min-height:330px}
.sicell{grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.sic{border:1px solid var(--line);border-radius:var(--r2);padding:24px}
.sic h4{font-size:15px;font-weight:500;margin-bottom:9px}
.sic p{font-size:13px;line-height:1.55}

/* ── about ─────────────────────────────────────────────────── */
.abt{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap);align-items:stretch}
.abtmain{grid-column:span 8;padding:46px 44px}
.abtmain h2{font-size:clamp(28px,3vw,44px);margin-bottom:22px}
.abtmain p{font-size:16px;line-height:1.65;color:#444;max-width:640px}
.abtside{grid-column:span 4;display:flex;flex-direction:column;gap:var(--gap)}
.stat{border:1px solid var(--line);border-radius:var(--r2);padding:24px;flex:1;
      display:flex;flex-direction:column;justify-content:center}
.stat .n{font-size:38px;font-weight:500;letter-spacing:-.04em}
.stat .l{font-size:12.5px;margin-top:6px}

/* ── prose (legal pages) ───────────────────────────────────── */
.prose{max-width:760px}
.prose h2{font-size:24px;margin:48px 0 14px}
.prose h3{font-size:17px;margin:30px 0 10px}
.prose p,.prose li{font-size:15px;line-height:1.72;color:var(--dim)}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 18px 20px}
.prose li{margin-bottom:9px}
.prose a{color:#fff;border-bottom:1px solid #444}
.prose a:hover{border-color:#fff}
.prose strong{color:#fff;font-weight:500}

/* ── contact ───────────────────────────────────────────────── */
.contactgrid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.cblock{grid-column:span 4;border:1px solid var(--line);border-radius:var(--r2);padding:30px;
        display:flex;flex-direction:column}
.cblock h3{font-size:18px;margin-bottom:10px}
.cblock p{font-size:13.5px;line-height:1.6;flex:1}
.cblock .mail{margin-top:22px;font-size:14.5px;display:inline-flex;align-items:center;gap:9px;
              border-bottom:1px solid #333;padding-bottom:6px;width:fit-content;
              transition:border-color .3s,gap .35s var(--ease)}
.cblock:hover .mail{border-color:currentColor;gap:14px}

/* ── cta + footer ──────────────────────────────────────────── */
.cta{border-radius:var(--r);background:#fff;color:#000;padding:76px 60px;display:flex;
     justify-content:space-between;align-items:center;gap:40px;flex-wrap:wrap}
.cta h2{font-size:clamp(30px,3.6vw,52px)}
.cta p{font-size:15.5px;color:#555;margin-top:14px}
.btn-dark{display:inline-flex;align-items:center;gap:12px;background:#000;color:#fff;
          border-radius:999px;padding:16px 16px 16px 28px;font-size:14.5px;
          transition:gap .35s var(--ease)}
.btn-dark:hover{gap:20px}
.btn-dark .arw{width:30px;height:30px;border-radius:50%;background:#fff;color:#000;
               display:grid;place-items:center}
.btn-dark svg{width:13px;height:13px}
.btn-line{display:inline-flex;align-items:center;gap:12px;border:1px solid var(--line2);
          border-radius:999px;padding:15px 26px;font-size:14.5px;
          transition:background .3s,color .3s,border-color .3s,gap .35s var(--ease)}
.btn-line:hover{background:#fff;color:#000;border-color:#fff;gap:18px}

footer{border-top:1px solid var(--line);padding:56px 0 34px;font-size:13.5px;color:var(--dim)}
footer h5{color:#fff;font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
          margin-bottom:16px;font-weight:500}
footer a{display:block;margin-bottom:11px;transition:color .25s}
footer a:hover{color:#fff}
.fgrid{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr;gap:40px}
.fbot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;margin-top:52px;
      padding-top:26px;border-top:1px solid var(--line);font-size:12.5px;color:var(--dim2)}
.fbot a{display:inline;margin:0}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

@media(max-width:1080px){
  .hcard,.hsub{grid-column:span 12}
  .node{grid-column:span 6}
  .arwtile,.sphere{grid-column:span 6}
  .pcard.big,.pcard.sm,.pcard.half{grid-column:span 12}
  .caps{grid-template-columns:repeat(2,1fr)}
  .redgrid{grid-template-columns:1fr}
  .special{padding:34px 26px}
  .sibig,.sicell,.abtmain,.abtside,.cblock{grid-column:span 12}
  .fgrid{grid-template-columns:1fr 1fr}
  .hcard{padding:44px 34px}
  section{padding:76px 0}
}
@media(max-width:760px){
  .navlinks{display:none;position:absolute;top:76px;left:28px;right:28px;flex-direction:column;
            gap:2px;background:#0b0b0b;border:1px solid var(--line2);border-radius:var(--r2);padding:12px}
  .navlinks.open{display:flex}
  .navtoggle{display:block;margin-left:auto;margin-right:12px}
  .getintouch{padding:9px 9px 9px 16px;font-size:12.5px}
  .caps,.sicell{grid-template-columns:1fr}
  .hcard{min-height:auto;padding:38px 26px}
  .hcard h1{font-size:34px}
  .phero h1{font-size:40px}
  .cta{padding:48px 30px}
  .abtmain{padding:34px 26px}
  .fgrid{grid-template-columns:1fr}
  .spec td:first-child{width:40%}
}