:root{
  --font: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --ink:#14161a; --ink-2:#3c424b; --muted:#6b7280;
  --paper:#fbfbf9; --panel:#f2f3f0; --rule:#d5d8d1;
  --red:#b31b1b;

  --k-apps:#5a6b8c;       --k-apps-bg:#eaedf3;
  --k-control:#a8542c;    --k-control-bg:#f8ece4;
  --k-planning:#6b4e8c;   --k-planning-bg:#efeaf6;
  --k-perception:#1f5d8c; --k-perception-bg:#e3edf5;
  --k-archive:#4a6b2e;    --k-archive-bg:#eef2e5;
  --k-ros:#b31b1b;        --k-ros-bg:#f8e8e8;
  --k-sensors:#1f7a68;    --k-sensors-bg:#e2f0ec;
  --k-hw:#8a8f88;         --k-hw-bg:transparent;
  --k-trust:#9a5b1f;      --k-trust-bg:#f7eee0;
  --k-eval:#7a4a6b;       --k-eval-bg:#f4eaf1;

  --maxw:1140px; --pad:clamp(20px,5vw,56px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font);font-size:16.5px;line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
a{color:inherit}
h1,h2,h3{font-family:var(--font);
  font-weight:600;letter-spacing:-.022em;line-height:1.07;margin:0}
.mono{font-family:var(--font);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;font-weight:500}
.eyebrow{color:var(--red);display:block;margin-bottom:14px}
.sc{color:var(--red)}
.lede{font-size:clamp(17.5px,1.9vw,20px);line-height:1.6;color:var(--ink-2)}
p{margin:0 0 .95em}
p:last-child{margin-bottom:0}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(251,251,249,.95);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--rule)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:16px 0}
.lock{display:flex;align-items:center;gap:clamp(12px,2vw,20px);text-decoration:none;min-width:0;
  margin-left:clamp(8px,1.6vw,26px)}
.crest{flex:none;display:flex;align-items:center;height:clamp(26px,3.2vw,34px)}
.crest img{height:100%;width:auto;display:block}
.crest .fallback{display:none;flex-direction:column;justify-content:center;height:100%;
  font-family:var(--font);font-weight:600;
  font-size:clamp(13px,1.5vw,16px);letter-spacing:-.01em;color:var(--red);line-height:1.15}
.rulebar{flex:none;width:1px;align-self:stretch;background:var(--rule);margin:2px 0}
.lock-txt{min-width:0}
.lock-txt .nm{font-family:var(--font);font-weight:600;
  font-size:clamp(17px,2.2vw,25px);letter-spacing:-.024em;line-height:1.1;display:block;
  color:var(--ink)}
.lock-txt .sub{display:block;margin-top:5px;color:var(--ink);font-size:10px;letter-spacing:.2em}
.nav{display:none;gap:22px;align-items:center}
@media(min-width:1060px){.nav{display:flex}}
.nav a{text-decoration:none;color:var(--ink);padding-bottom:2px;border-bottom:1px solid transparent;white-space:nowrap}
.nav a:hover,.nav a:focus-visible{color:var(--red);border-bottom-color:var(--red)}

/* hero */
.hero{border-bottom:1px solid var(--rule);padding:clamp(56px,8vw,110px) 0 clamp(48px,7vw,90px)}
h1{font-size:clamp(32px,4.8vw,56px);letter-spacing:-.028em;max-width:18em}
h1 .em{color:var(--red)}
.hero .lede{margin-top:24px;max-width:38em}
.hero .lede + .lede{margin-top:16px}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.btn{font-family:var(--font);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  font-weight:500;text-decoration:none;padding:13px 20px;border:1px solid var(--ink);background:var(--ink);
  color:var(--paper);transition:background .15s,color .15s,border-color .15s;display:inline-block}
.btn:hover,.btn:focus-visible{background:var(--red);border-color:var(--red)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn.ghost:hover,.btn.ghost:focus-visible{border-color:var(--red);color:var(--red)}

/* sections */
.sect{padding:clamp(54px,7vw,96px) 0;border-bottom:1px solid var(--rule)}
.sect.tint{background:var(--panel)}
.sect-head{max-width:42rem;margin-bottom:clamp(30px,4vw,48px)}
.sect-head h2{font-size:clamp(27px,3.5vw,40px)}
.sect-head p{margin-top:18px}

/* symbiotic computing stack */
.scs{display:grid;gap:10px;grid-template-columns:1fr 150px 104px 104px;
  grid-template-areas:
    "apps apps trust eval"
    "ctrl arch trust eval"
    "plan arch trust eval"
    "perc arch trust eval"
    "ros  ros  trust eval"
    "comp sens trust eval";}
@media(max-width:900px){
  .scs{grid-template-columns:1fr;
    grid-template-areas:"apps" "ctrl" "plan" "perc" "arch" "ros" "comp" "sens" "trust" "eval";}}
.bd{border:1px solid var(--bc);border-left:3px solid var(--bc);background:var(--bbg);
  padding:15px clamp(14px,1.8vw,18px);display:flex;flex-direction:column;justify-content:center;
  gap:4px;text-decoration:none;transition:box-shadow .15s,transform .15s}
a.bd:hover,a.bd:focus-visible{box-shadow:0 2px 0 0 var(--bc);transform:translateY(-1px)}
.bd .hd{display:flex;align-items:center;justify-content:space-between;gap:14px}
.bd h3{font-size:15.5px;color:var(--bc);}
.bd .dsc{font-size:10.5px;line-height:1.5;color:var(--muted);font-family:var(--font);letter-spacing:.03em}
.bd.dash{border-style:dashed;border-left-style:dashed}
.bd.dash h3,.bd.dash .dsc{color:var(--k-hw)}
.bd.mid{align-items:center;text-align:center}
.bd.mid .hd{flex-direction:column;gap:9px}
.bd.mid .dsc{text-align:center}
.bd.vert{align-items:center;text-align:center;justify-content:center;padding-left:10px;padding-right:10px;border-left-width:1px;border-top:4px solid var(--bc)}
.bd.vert h3{font-size:15px;line-height:1.22}
.bd.vert .avs{margin-top:14px;justify-content:center;gap:5px;flex-wrap:wrap}
.bd.vert .av{width:24px;height:24px}
.bd.vert .av .ini{font-size:9px}
.avs{display:flex;gap:7px;flex:none}
.av{position:relative;display:block;width:30px;height:30px;border-radius:50%;overflow:hidden;
  background:var(--paper);border:1px solid var(--rule);flex:none}
.av img{width:100%;height:100%;object-fit:cover;object-position:center 20%;display:block;
  filter:grayscale(100%) contrast(1.04)}
.av .ini{display:none;position:absolute;inset:0;align-items:center;justify-content:center;
  font-family:var(--font);font-size:10px;font-weight:500;color:var(--muted)}
.appchips{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
.ac{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--bc);background:var(--paper);
  padding:9px 14px 9px 12px;flex:0 1 auto}
.ac svg{width:22px;height:22px;flex:none}
.ac svg path,.ac svg circle{fill:none;stroke:var(--bc);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ac span{font-family:var(--font);font-weight:600;
  font-size:14px;letter-spacing:-.008em;color:var(--bc)}
.scs-cap{margin-top:22px;font-size:14.5px;line-height:1.6;color:var(--ink-2);max-width:56em}
.scs-cap strong{font-weight:600}

/* people */
.dirs{display:grid;gap:clamp(14px,2vw,22px);margin-bottom:clamp(36px,4.5vw,56px)}
@media(min-width:680px){.dirs{grid-template-columns:1fr 1fr}}
.dir{background:var(--paper);border:1px solid var(--rule);padding:clamp(22px,2.6vw,30px);
  display:flex;gap:clamp(18px,2.4vw,26px);align-items:flex-start;text-decoration:none;
  transition:border-color .15s}
.dir:hover,.dir:focus-visible{border-color:var(--red)}
.dir .ph{flex:none;width:clamp(96px,13vw,128px)}
.dir .nm2{font-family:var(--font);font-weight:600;
  font-size:clamp(19px,2.1vw,23px);letter-spacing:-.018em;display:block;line-height:1.15}
.dir:hover .nm2,.dir:focus-visible .nm2{color:var(--red)}
.dir .role{color:var(--red);display:block;margin-bottom:9px}
.dir .ps{font-family:var(--font);font-size:10.5px;letter-spacing:.05em;color:var(--muted);
  line-height:1.55;display:block;margin-top:9px}
.people{display:grid;gap:clamp(20px,2.6vw,30px) clamp(16px,2.2vw,26px);grid-template-columns:repeat(2,1fr)}
.people + .people{margin-top:clamp(20px,2.6vw,30px)}
@media(min-width:620px){.people{grid-template-columns:repeat(3,1fr)}}
@media(min-width:940px){.people{grid-template-columns:repeat(5,1fr)}}
.person{text-decoration:none;display:block}
.ph{position:relative;display:block;aspect-ratio:1/1;background:var(--panel);border:1px solid var(--rule);
  overflow:hidden;margin-bottom:12px}
.ph img{width:100%;height:100%;object-fit:cover;object-position:center 20%;display:block;
  filter:grayscale(100%) contrast(1.04);transition:filter .25s}
.person:hover .ph img,.person:focus-visible .ph img,.dir:hover .ph img,.dir:focus-visible .ph img{filter:grayscale(0%)}
.ph .mono-ph{display:none;position:absolute;inset:0;align-items:center;justify-content:center;
  font-family:var(--font);font-weight:600;font-size:30px;color:#c3c7c0}
.person .nm2{font-family:var(--font);font-weight:600;
  font-size:16px;letter-spacing:-.012em;display:block;line-height:1.22}
.person:hover .nm2,.person:focus-visible .nm2{color:var(--red)}
.person .ps{font-family:var(--font);font-size:10px;letter-spacing:.04em;color:var(--muted);
  line-height:1.5;display:block;margin-top:6px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.tg{font-family:var(--font);font-size:9px;letter-spacing:.07em;text-transform:uppercase;
  padding:3px 6px;border:1px solid var(--tc);color:var(--tc);background:var(--tbg)}

/* deployments */
.deps{display:grid;gap:clamp(14px,2vw,22px)}
@media(min-width:640px){.deps{grid-template-columns:1fr 1fr}}
@media(min-width:1000px){.deps{grid-template-columns:repeat(3,1fr)}}
.dep{background:var(--paper);border:1px solid var(--rule);padding:clamp(22px,2.6vw,30px);display:flex;flex-direction:column;gap:10px}
.dep .shot{aspect-ratio:16/10;background:var(--panel);border:1px solid var(--rule);margin-bottom:6px;
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.dep .shot img{width:100%;height:100%;object-fit:cover;display:block}
.dep .shot .ph2{font-family:var(--font);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;color:#b6bab3}
.dep h3{font-size:18px}
.dep p{font-size:14.5px;color:var(--ink-2);line-height:1.55}
.dep .meta{margin-top:auto;padding-top:12px;border-top:1px solid var(--rule);
  font-family:var(--font);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* build with us */
.cta{background:var(--ink);color:var(--paper);padding:clamp(34px,4.5vw,58px)}
.cta h2{font-size:clamp(26px,3.2vw,38px);color:var(--paper);max-width:16em}
.cta p{margin-top:18px;color:#c9ccd2;max-width:40em}
.cta .eyebrow{color:#e08a8a}
.cta .sc{color:#e08a8a}
.ctamail{margin-top:24px;font-size:15px}
.ctamail a{color:#e08a8a;text-decoration:none;border-bottom:1px solid rgba(224,138,138,.4);padding-bottom:1px}
.ctamail a:hover,.ctamail a:focus-visible{color:var(--paper);border-bottom-color:var(--paper)}
.ftr a[href^="mailto:"]{color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--rule)}
.ftr a[href^="mailto:"]:hover,.ftr a[href^="mailto:"]:focus-visible{color:var(--red);border-bottom-color:var(--red)}
.ghmark{display:block;margin-bottom:18px}
.ghmark svg{width:34px;height:34px;fill:var(--paper);display:block}
.cta .btn{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.cta .btn:hover,.cta .btn:focus-visible{background:var(--red);color:var(--paper);border-color:var(--red)}
.cta .btn.ghost{background:transparent;color:var(--paper);border-color:#4a4f57}
.cta .btn.ghost:hover,.cta .btn.ghost:focus-visible{border-color:var(--paper);color:var(--paper)}
.cta-grid{display:grid;gap:clamp(26px,3.4vw,44px);align-items:start}
@media(min-width:860px){.cta-grid{grid-template-columns:1.25fr .75fr}}
.gh{border:1px solid #40454d;padding:clamp(20px,2.4vw,26px);display:block;text-decoration:none;
  transition:border-color .15s,background .15s}
.gh:hover,.gh:focus-visible{border-color:var(--paper);background:#1c1f25}
.gh .ghhd{display:flex;align-items:center;gap:11px;margin-bottom:12px}
.gh .ghhd svg{width:24px;height:24px;flex:none;fill:var(--paper)}
.gh h3{font-size:17px;color:var(--paper)}
.gh p{margin-top:0;font-size:14px;color:#a9aeb6;line-height:1.55}
.gh .lnk{display:inline-block;margin-top:14px;font-family:var(--font);font-size:10.5px;
  letter-spacing:.13em;text-transform:uppercase;color:#e08a8a}

/* seminar + news */
.rows{border-top:1px solid var(--rule)}
.row{display:grid;grid-template-columns:1fr;gap:6px;padding:20px 0;border-bottom:1px solid var(--rule);
  text-decoration:none}
@media(min-width:760px){.row{grid-template-columns:150px 1fr 190px;gap:26px;align-items:baseline}
  .row:not(:has(.who)){grid-template-columns:150px 1fr}}
.row .dt{font-family:var(--font);font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--red)}
.row .ttl{font-family:var(--font);font-weight:600;
  font-size:17px;letter-spacing:-.012em;line-height:1.25}
.row .ttl a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.row .ttl a:hover,.row .ttl a:focus-visible{color:var(--red);border-bottom-color:var(--red)}
.row .who{font-family:var(--font);font-size:11px;letter-spacing:.04em;color:var(--muted);line-height:1.5}

/* subpages */
.page-hd{border-bottom:1px solid var(--rule);padding:clamp(40px,6vw,76px) 0 clamp(32px,4.5vw,52px)}
.page-hd .back{font-family:var(--font);font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;text-decoration:none;color:var(--muted);display:inline-block;margin-bottom:22px}
.page-hd .back:hover,.page-hd .back:focus-visible{color:var(--red)}
.page-hd h1{font-size:clamp(32px,5vw,58px);max-width:14em}
.page-hd .lede{margin-top:22px;max-width:40em}
.layerbadge{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--bc);background:var(--bbg);
  padding:7px 13px;margin-bottom:20px}
.layerbadge .dot{width:10px;height:10px;background:var(--bc);flex:none}
.layerbadge span{font-family:var(--font);font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--bc)}
.projs{display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule)}
@media(min-width:700px){.projs{grid-template-columns:1fr 1fr}}
.proj{background:var(--paper);padding:clamp(22px,2.6vw,30px)}
.proj h3{font-size:19px;margin-bottom:10px}
.proj p{font-size:14.5px;color:var(--ink-2);line-height:1.55}
.proj .meta{margin-top:14px;font-family:var(--font);font-size:10px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted)}
.pubs{border-top:1px solid var(--rule)}
.pub{padding:20px 0;border-bottom:1px solid var(--rule)}
.pub .t{font-family:var(--font);font-weight:600;font-size:17px;
  letter-spacing:-.012em;line-height:1.3;display:block}
.pub .a{font-size:14.5px;color:var(--ink-2);display:block;margin-top:5px}
.pub .t a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.pub .t a:hover{color:var(--red);border-bottom-color:var(--red)}
.pub .a .us{color:var(--red)}
.pub .v{font-family:var(--font);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);display:block;margin-top:7px}

.todo{display:inline-block;font-family:var(--font);font-size:9px;letter-spacing:.1em;
  text-transform:uppercase;background:#fff3cd;color:#7a5a00;border:1px solid #e6cf7a;padding:2px 6px;
  vertical-align:middle}

.ftr{padding:38px 0 52px;color:var(--muted);font-size:14px}
.ftr-in{display:grid;gap:20px}
@media(min-width:760px){.ftr-in{grid-template-columns:1.5fr 1fr;align-items:start}}
.ftr a{color:var(--muted)}
.fnav{display:flex;flex-wrap:wrap;gap:17px}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--ink);color:var(--paper);padding:10px 16px;z-index:100}

/* mobile navigation (shown when the inline nav is hidden) */
.mnav{position:relative;display:block;margin-right:2px}
@media(min-width:1060px){.mnav{display:none}}
.mnav>summary{list-style:none;cursor:pointer;user-select:none;font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink);padding:10px 12px;border:1px solid var(--rule);
  background:var(--paper)}
.mnav>summary::-webkit-details-marker{display:none}
.mnav[open]>summary{border-color:var(--red);color:var(--red)}
.mnav-list{position:absolute;right:0;top:calc(100% + 8px);min-width:200px;display:flex;
  flex-direction:column;background:var(--paper);border:1px solid var(--rule);
  box-shadow:0 8px 24px rgba(20,22,26,.08);z-index:60}
.mnav-list a{padding:13px 16px;text-decoration:none;color:var(--ink);font-size:12px;
  letter-spacing:.08em;border-bottom:1px solid var(--hair)}
.mnav-list a:last-child{border-bottom:none}
.mnav-list a:hover,.mnav-list a:focus-visible{color:var(--red);background:var(--bbg,#f5f6f3)}

/* stack verticals keep their spanning identity when the grid collapses */
@media(max-width:900px){
  .bd.vert{align-items:flex-start;text-align:left;padding-left:14px;
    border-left-width:1px;border-top-width:4px}
  .bd.vert::after{content:"spans all layers";font-family:var(--mono);font-size:9px;
    letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-top:6px}
  .bd.vert .avs{justify-content:flex-start;margin-top:10px}
}

/* compact header on small screens */
@media(max-width:640px){
  .hdr-in{gap:12px;padding:10px 0}
  .lock{gap:10px;margin-left:0}
  .crest{height:22px}
  .rulebar{display:none}
  .lock-txt .nm{font-size:15px}
  .lock-txt .sub{display:none}
  .mnav>summary{padding:8px 10px}
}

/* stack bands: wrap instead of overflowing on narrow screens */
@media(max-width:640px){
  .bd{min-width:0}
  .bd .hd{flex-wrap:wrap;justify-content:flex-start;row-gap:8px}
  .avs{flex-wrap:wrap;flex:0 1 auto}
  .scs{overflow:hidden}
}

/* open-source commitment under the stack figure */
.oss-line{margin-top:14px;color:var(--ink)}

/* name-descriptor rule: the sub stays visible on small screens */
@media(max-width:640px){
  .lock-txt .sub{display:block;font-size:7.5px;letter-spacing:.14em}
}

/* evaluation ladder (layer page) */
.ladder{display:flex;flex-direction:column;gap:14px;margin-top:8px}
.stage{display:grid;grid-template-columns:34px 1fr;gap:6px 14px;background:var(--sb,#f4f5f2);
  border:1px solid var(--rule);border-left:3px solid var(--sa,var(--k-eval));padding:18px 18px 16px}
.stage .snum{font-size:11px;letter-spacing:.14em;color:var(--sa,var(--k-eval));padding-top:3px}
.stage h3{margin:0 0 6px;font-size:17px}
.stage p{margin:0;color:var(--ink-2);font-size:14.5px;line-height:1.6}
.sshot{grid-column:1/-1;display:block;margin-top:12px;border:1px solid var(--rule);
  overflow:hidden;background:#fff}
.sshot img{display:block;width:100%;height:auto;max-height:340px;object-fit:cover}
@media(min-width:860px){
  .stage{grid-template-columns:34px 1fr 250px;align-items:start}
  .sshot{grid-column:auto;margin-top:0}
  .sshot img{height:150px;object-fit:cover}
}
.dep .shot img{display:block;width:100%;height:100%;object-fit:cover}

/* disabled buttons: visible commitments, not yet clickable */
.btn.disabled{opacity:.45;cursor:not-allowed;pointer-events:none;user-select:none;
  border-style:dashed}

.filters{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 22px}
.filters .tg{cursor:pointer;border:1px solid var(--tc);appearance:none;-webkit-appearance:none}
.filters .tg.on{box-shadow:0 2px 0 0 var(--tc)}
.pub .tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:7px}
.pub.hide{display:none}

.pubs-empty{font-size:14.5px;color:var(--muted);margin:0 0 18px}