/* Humanoid Wall Climbing project page. Layout, type scale and palette follow supermimic.github.io. */
:root{
  --page:#ffffff; --band:#f5f5f7; --fill:#e8e8ed; --hair:#d2d2d7;
  --ink:#1d1d1f; --ink2:#6e6e73; --blue:#0071e3;
  /* media tags, and the ongoing chip in the nav */
  --done:#1a7f37; --done-bg:#e8f5ec;
  --wip:#9a5200; --wip-bg:#fff3dc; --wip-dot:#f59e0b;
  --mk:#d98200;
  --display:"Inter Tight","Inter","Helvetica Neue",Arial,sans-serif;
  --text:"Inter","Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --gut:24px;
  --wide:1260px; --mid:1050px; --copy:830px;
  --edge:max(var(--gut), calc((100% - var(--wide)) / 2));
  --ease:cubic-bezier(.28,.11,.32,1);
  --sec:100px;
}
@media (min-width:735px){:root{--gut:40px;--sec:140px}}
@media (min-width:1069px){:root{--sec:160px}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px;scroll-behavior:smooth}
body{margin:0;background:var(--page);color:var(--ink);font-family:var(--text);font-size:17px;line-height:1.47;letter-spacing:-.011em;-webkit-font-smoothing:antialiased;font-feature-settings:"cv11","ss01";overflow-x:clip}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
img,video{max-width:100%;display:block}
figure{margin:0}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--ink);color:#fff;padding:10px 16px;border-radius:12px}
.skip:focus{left:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- layout ---------- */
.wrap{width:min(var(--wide), calc(100% - 2 * var(--gut)));margin-inline:auto}
.wrap-mid{width:min(var(--mid), calc(100% - 2 * var(--gut)));margin-inline:auto}
.wrap-copy{width:min(var(--copy), calc(100% - 2 * var(--gut)));margin-inline:auto}
.sec{padding-block:var(--sec)}
.band{background:var(--band)}

/* ---------- type ---------- */
.eyebrow{font:600 17px/1.24 var(--display);letter-spacing:-.01em;margin:0 0 10px}
.hx{font:600 40px/1.1 var(--display);letter-spacing:-.012em;margin:0;text-wrap:balance}
.hx br{display:none}
.hl-head{font:600 32px/1.125 var(--display);letter-spacing:-.008em;margin:0;text-wrap:balance}
.sub-head{font:600 24px/1.16 var(--display);letter-spacing:-.012em;margin:0;text-wrap:balance}
.lede{font:400 17px/1.47 var(--text);color:var(--ink2);margin:0;text-wrap:balance}
p,li,dd{text-wrap:pretty}
.lede b,.copy b,.cap b{color:var(--ink);font-weight:400}
.copy{color:var(--ink2)}
sup.fn{font-size:.6em;line-height:0;vertical-align:.7em;margin-left:1px}
sup.fn a{color:inherit;text-decoration:underline;text-underline-offset:2px}
@media (min-width:735px){
  .eyebrow{font-size:21px;margin-bottom:14px}
  .hx{font-size:64px;line-height:1.06}
  .hx br{display:inline}
  .hl-head{font-size:48px;line-height:1.08}
  .sub-head{font-size:32px;line-height:1.125}
  .lede{font-size:21px;line-height:1.381;letter-spacing:.004em}
}
@media (min-width:1069px){
  .hx{font-size:80px;line-height:1.05;letter-spacing:-.015em}
  .hl-head{font-size:56px;line-height:1.07}
}

/* ---------- ongoing chip in the nav: a pulsing dot ---------- */
.wip-dot{position:relative;display:inline-block;flex:none;width:6px;height:6px;border-radius:50%;background:var(--wip-dot);box-shadow:0 0 0 2.5px rgba(245,158,11,.2)}
.wip-dot::after{content:"";position:absolute;inset:-5px;border-radius:50%;background:radial-gradient(closest-side,rgba(245,158,11,.4),rgba(245,158,11,0));animation:wip-glow 2.4s var(--ease) infinite}
@keyframes wip-glow{0%,100%{opacity:.25;transform:scale(.7)}50%{opacity:1;transform:scale(1.15)}}
.chip-wip{display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 11px 0 10px;border-radius:999px;background:rgba(0,0,0,.04);box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);color:var(--ink2);font:500 12px/1 var(--text);letter-spacing:.01em;white-space:nowrap;transition:background .25s var(--ease),color .25s var(--ease)}
.chip-wip:hover{text-decoration:none;background:rgba(0,0,0,.07);color:var(--ink)}

/* ---------- status marks: a hollow ring for a reference only, a half-filled one for a policy in simulation ---------- */
.mk{position:relative;display:inline-block;flex:none;width:11px;height:11px;border-radius:50%;box-shadow:inset 0 0 0 1.6px var(--mk)}
.mk-sim{background:linear-gradient(90deg,var(--mk) 50%,transparent 50%)}
.tag .mk{pointer-events:auto}
.tag .mk::after{content:"";position:absolute;inset:-8px}

/* ---------- media tags ---------- */
.tag{position:absolute;left:14px;top:14px;z-index:2;display:inline-flex;align-items:center;gap:7px;height:26px;padding:0 11px 0 10px;border-radius:999px;background:rgba(255,255,255,.84);-webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);font:500 12px/1 var(--text);letter-spacing:0;color:var(--ink);white-space:nowrap;pointer-events:none}
.tag i{width:7px;height:7px;border-radius:50%;background:var(--ink2)}
.tag.sim i{background:var(--blue)}
.tag.hw i{background:var(--done)}

/* ---------- media boxes ---------- */
.ph{position:relative;border-radius:28px;background:var(--band);overflow:hidden}
.band .ph{background:var(--fill)}
.ph.media>video,.ph.media>img,.ph.media>picture>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ph.media>video.fit{object-fit:contain}
/* round play / pause button; 44 px hit area */
.vbtn{position:absolute;right:16px;bottom:16px;z-index:2;width:44px;height:44px;padding:0;border:0;border-radius:50%;background:rgba(232,232,237,.86);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);color:var(--ink);display:grid;place-items:center}
.vbtn:hover{background:rgba(210,210,215,.9)}
.vbtn svg,.fplay svg,.playbtn svg{width:16px;height:16px}
.i-play{display:none}
.paused .i-play{display:inline}
.paused .i-pause{display:none}

/* ---------- nav pill ---------- */
.nav{position:fixed;z-index:50;top:max(8px, env(safe-area-inset-top));left:50%;transform:translateX(-50%);width:min(1026px, calc(100% - 16px));height:54px;display:flex;align-items:center;gap:8px;padding:0 10px 0 20px;border-radius:18px;background:rgba(255,255,255,.78);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);box-shadow:0 0 0 1px rgba(0,0,0,.06), 0 6px 24px rgba(0,0,0,.04)}
.nav-title{font:600 19px/1 var(--display);letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.nav-title:hover{text-decoration:none}
.nav-title .t-short{display:none}
.nav .chip-wip{margin-left:4px;margin-right:auto}
.pill{position:relative;display:inline-flex;align-items:center;justify-content:center;height:30px;padding:0 13px;border-radius:999px;font:400 12px/1 var(--text);letter-spacing:0;white-space:nowrap;border:1px solid transparent;background:none}
.pill::after{content:"";position:absolute;inset:-7px -3px}
.pill.out{border-color:var(--ink2);color:var(--ink)}
.pill.out:hover{text-decoration:none;background:var(--band)}
.pill.solid{background:var(--blue);color:#fff}
.pill.solid:hover{text-decoration:none;background:#0077ed}
.explore{position:relative}
.explore-menu{position:absolute;right:-60px;top:44px;width:240px;padding:8px;border-radius:18px;background:rgba(255,255,255,.94);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);box-shadow:0 0 0 1px rgba(0,0,0,.06), 0 18px 40px rgba(0,0,0,.10)}
.explore-menu a{display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:12px;color:var(--ink);font-size:15px}
.explore-menu a:hover{background:var(--fill);text-decoration:none}
@media (max-width:734px){
  .nav{padding-left:16px;gap:6px}
  .nav .hide-sm{display:none}
  .nav-title{font-size:17px}
  .nav-title .t-full{display:none}
  .nav-title .t-short{display:inline}
  .explore-menu{right:-4px}
}

/* ---------- hero ---------- */
.hero{padding-top:110px;text-align:center}
.hero .eyebrow{font-size:21px}
.hero-sub{margin:20px auto 0;max-width:38em;font:400 17px/1.47 var(--text);color:var(--ink)}
.hero-stage{position:relative;margin-top:44px;padding-bottom:44px}
.hero-stage .ph{aspect-ratio:1/1;background:#2a4867}
@media (min-width:735px){
  .hero{padding-top:104px}
  .hero .eyebrow{font-size:24px}
  .hero-sub{font-size:21px;margin-top:24px}
  .hero-stage{margin-top:32px}
  .hero-stage .ph{aspect-ratio:2/1;width:min(100%, max(600px, calc((100svh - 520px) * 2)));margin-inline:auto}
}

/* ---------- section heads with a link on the right ---------- */
.headrow{display:flex;align-items:flex-end;justify-content:space-between;gap:12px 24px;flex-wrap:wrap}
.headrow .lnk{font-size:17px;display:inline-flex;align-items:center;gap:6px;min-height:44px}

/* ---------- carousels ---------- */
.track{position:relative;display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:var(--edge);padding-inline:var(--edge);overscroll-behavior-x:contain;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.track::-webkit-scrollbar{display:none}
.track>*{scroll-snap-align:start;flex:none}
.track::after{content:"";flex:0 0 1px}

/* ---------- highlights ---------- */
.hl-track{margin-top:40px}
.hcard{width:100%;max-width:var(--wide);height:min(640px, 150vw);background:var(--page);border-radius:28px;display:flex;flex-direction:column;align-items:center;padding:36px 20px 20px;text-align:center}
.hcard h3{margin:0 0 28px;font:600 21px/1.24 var(--display);letter-spacing:-.01em;text-wrap:balance}
.hcard .ph{flex:1;width:100%;border-radius:18px;background:var(--band)}
@media (min-width:735px){
  .hcard{height:min(720px, 62vw);padding:56px 40px 40px}
  .hcard h3{font-size:28px;line-height:1.14;margin-bottom:40px}
}
.pager-row{display:flex;justify-content:center;align-items:center;gap:16px;margin-top:40px}
.pager{display:flex;align-items:center;height:56px;padding:0 14px;border-radius:28px;background:var(--fill)}
.dot{position:relative;width:28px;height:44px;border:0;background:none;padding:0;display:grid;place-items:center;transition:width .5s var(--ease)}
.dot i{display:block;width:8px;height:8px;border-radius:4px;background:var(--ink2);overflow:hidden;position:relative;transition:width .5s var(--ease)}
.dot.on{width:64px}
.dot.on i{width:48px;background:var(--hair)}
.dot.on i::before{content:"";position:absolute;inset:0;background:var(--ink);transform-origin:left;transform:scaleX(var(--p,0))}
.playbtn{width:56px;height:56px;border-radius:50%;border:0;background:var(--fill);display:grid;place-items:center}
.playbtn svg{width:18px;height:18px}

/* ---------- story sections ---------- */
.story-head{text-align:center}
.story-head .lede{margin-top:32px}
@media (min-width:735px){.story-head .lede{margin-top:40px}}
.block{margin-top:72px}
.block-head{margin-bottom:28px}
.block-head .lede{margin-top:14px}
@media (min-width:735px){.block{margin-top:110px}.block-head{margin-bottom:40px}}

.split{display:grid;gap:28px;align-items:center}
.split .copy{margin:0;font-size:17px;line-height:1.47}
.split .copy+.copy{margin-top:14px}
@media (min-width:900px){
  .split{grid-template-columns:1.25fr 1fr;gap:64px}
  .split.rev{grid-template-columns:1fr 1.25fr}
  .split.rev>:first-child{order:2}
  .split .copy{font-size:19px;line-height:1.42}
}

/* white tiles holding figures, captions below */
.tile{background:var(--page);border-radius:28px;padding:20px}
.band .tile{background:var(--page)}
.sec:not(.band) .tile{background:var(--band)}
.tile img{width:100%;height:auto;border-radius:12px}
.cap{margin:14px 4px 0;font-size:14px;line-height:1.47;color:var(--ink2)}
@media (min-width:735px){.tile{padding:36px 40px 28px}.cap{font-size:15px;margin-top:18px}}

/* rows whose items keep their aspect ratio and share one height: flex-grow = aspect ratio */
.jrow{display:flex;gap:16px}
.jrow>figure{flex:var(--ar) 1 0;min-width:0}
.jrow img,.jrow video{width:100%;height:auto;aspect-ratio:var(--ar);object-fit:cover;border-radius:18px;background:var(--band)}
.jrow figcaption{margin:10px 4px 0;font-size:13px;line-height:1.4;color:var(--ink2)}
@media (max-width:734px){
  .jrow.wrap-sm{display:grid;grid-template-columns:1fr 1fr;grid-auto-flow:dense;gap:12px}
  .jrow.wrap-sm>.full{grid-column:1 / -1}
}

/* ---------- three questions ---------- */
.qtiles{display:grid;gap:16px;margin-top:64px}
.qtile{display:flex;flex-direction:column;gap:12px;min-height:200px;padding:28px;border-radius:28px;background:var(--band);color:var(--ink);transition:background .3s var(--ease)}
.qtile:hover{text-decoration:none;background:var(--fill)}
.qk{font:600 14px/1 var(--text);color:var(--ink2);letter-spacing:0}
.qtile b{font:600 24px/1.16 var(--display);letter-spacing:-.012em;text-wrap:balance}
.qtile .more{margin-top:auto;color:var(--blue);font-size:15px}
@media (min-width:900px){.qtiles{grid-template-columns:repeat(3,1fr);gap:20px;margin-top:88px}.qtile{min-height:260px;padding:36px 32px}.qtile b{font-size:28px;line-height:1.14}}

/* robot spec row */
.specs{display:grid;gap:0;margin-top:64px;border-top:1px solid var(--hair)}
.specs>div{padding:24px 0;border-bottom:1px solid var(--hair)}
.specs>div>b{display:block;font:600 44px/1.05 var(--display);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.specs>div>span{display:block;margin-top:6px;font-size:15px;line-height:1.4;color:var(--ink2)}
@media (min-width:900px){
  .specs{grid-template-columns:repeat(3,1fr);column-gap:40px;margin-top:96px}
  .specs>div{padding:36px 0 40px;border-bottom:0}
  .specs>div>b{font-size:64px}
  .specs>div>span{font-size:17px}
}

/* ---------- spine palm ---------- */
.palm-pair{display:grid;gap:16px}
.palm-pair>.ph{aspect-ratio:4/3}
.palm-pair>.ph+.ph{aspect-ratio:1/1}
@media (min-width:735px){.palm-pair{grid-template-columns:2.1fr 1fr;gap:20px}.palm-pair>.ph+.ph{aspect-ratio:auto}}

/* ---------- contact model: steps with equations ---------- */
.model{margin-top:72px;border-radius:28px;background:var(--band);padding:36px 20px 28px}
.model-head{text-align:center;margin-bottom:28px}
.model-head .lede{margin-top:12px;font-size:17px}
.step{position:relative;background:var(--page);border-radius:20px;padding:22px 20px 18px;min-width:0}
.step h4{margin:0 0 4px;font:600 17px/1.3 var(--display);letter-spacing:-.01em}
.step h4::before{counter-increment:st;content:counter(st);display:inline-grid;place-items:center;width:24px;height:24px;margin-right:10px;border-radius:50%;background:var(--ink);color:#fff;font:600 13px/1 var(--text);vertical-align:1px}
.step p{margin:8px 0 0;font-size:14px;line-height:1.47;color:var(--ink2)}
.step .eq{margin:10px 0 0;color:var(--ink)}
@media (min-width:735px){.model{padding:64px 56px 48px;margin-top:100px}.model-head{margin-bottom:40px}.model-head .lede{font-size:19px}.step{padding:26px 28px 22px}.step p{font-size:15px}}
/* KaTeX: long display maths scroll inside their card instead of widening the page */
.katex-display{margin:.4em 0;overflow-x:auto;overflow-y:hidden;padding:2px 0}
.katex{font-size:1.06em}
@media (max-width:734px){
  .katex-display>.katex{font-size:.92em}
  .model{padding-inline:12px}
  .step{padding-inline:16px}
}
@media (max-width:380px){.katex-display>.katex{font-size:.82em}.rcard{padding-inline:14px}}

/* ---------- side-by-side comparisons ---------- */
.pair{margin-top:40px}
.pair-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pp figcaption{margin:12px 4px 0;font-size:14px;line-height:1.4;color:var(--ink2)}
.pp figcaption b{color:var(--ink);font-weight:600}
.pv{position:relative;border-radius:18px;overflow:hidden;background:var(--band)}
.pv video{display:block;width:100%;height:100%;object-fit:cover;aspect-ratio:var(--ar,16/9)}
.band .pv{background:var(--fill)}
.pbar{display:flex;align-items:flex-start;gap:16px;margin-top:20px}
.pcap{flex:1;margin:0 4px;font-size:14px;line-height:1.47;color:var(--ink2)}
.pcap b{color:var(--ink);font-weight:600}
.fplay{flex:none;width:44px;height:44px;padding:0;border:0;border-radius:50%;background:var(--fill);color:var(--ink);display:grid;place-items:center}
.fplay:hover{background:var(--hair)}
@media (max-width:734px){.pair-grid.stack-sm{grid-template-columns:1fr}}
@media (min-width:735px){.pair-grid{gap:20px}.pp figcaption{font-size:17px;margin-top:16px}.pcap{font-size:17px}}

/* ---------- flow diagrams: nodes joined by arrows; vertical on phones ---------- */
.stage{border-radius:28px;background:var(--band);padding:28px 20px 24px}
.stage+.stage{margin-top:16px}
.stage-k{margin:0;font:600 13px/1 var(--mono);letter-spacing:.04em;text-transform:uppercase;color:var(--ink2)}
.stage h3{margin:10px 0 22px;font:600 24px/1.16 var(--display);letter-spacing:-.012em}
.chain{list-style:none;margin:0;padding:0;display:grid;gap:30px}
.chain>li{position:relative;background:var(--page);border-radius:18px;padding:16px 18px;box-shadow:0 0 0 1px rgba(0,0,0,.05)}
.chain>li>b{display:block;font:600 17px/1.25 var(--display);letter-spacing:-.01em}
.chain>li>span{display:block;margin-top:6px;font-size:14px;line-height:1.45;color:var(--ink2)}
.chain>li.hot{box-shadow:0 0 0 2px var(--blue)}
.chain>li+li::before{content:"";position:absolute;left:50%;top:-25px;width:2px;height:16px;background:#86868b;transform:translateX(-50%)}
.chain>li+li::after{content:"";position:absolute;left:50%;top:-10px;border:6px solid transparent;border-top:7px solid #86868b;border-bottom:0;transform:translateX(-50%)}
.band .stage{background:var(--page)}
.band .stage .chain>li{background:var(--band);box-shadow:none}
.band .stage .chain>li.hot{box-shadow:0 0 0 2px var(--blue)}
.chips{display:flex;flex-wrap:wrap;align-items:center;gap:6px 4px;margin:22px 0 0;padding:0;list-style:none;font:500 13px/1 var(--mono);color:var(--ink)}
.chips li{display:inline-flex;align-items:center;height:28px;padding:0 10px;border-radius:999px;background:var(--page);box-shadow:0 0 0 1px var(--hair)}
.chips li.arrow{padding:0 2px;background:none;box-shadow:none;color:var(--ink2)}
.chips .lbl{font:500 13px/1 var(--text);color:var(--ink2);background:none;box-shadow:none;padding:0 6px 0 0}
.stage-note{margin:18px 2px 0;font-size:14px;line-height:1.5;color:var(--ink2)}
.stage-note b{color:var(--ink);font-weight:600}
@media (min-width:900px){
  .stage{padding:36px 36px 30px}
  .stage h3{font-size:28px}
  .chain{grid-auto-flow:column;grid-auto-columns:1fr;gap:34px}
  .chain>li+li::before{left:-27px;top:50%;width:16px;height:2px;transform:translateY(-50%)}
  .chain>li+li::after{left:-12px;top:50%;border:6px solid transparent;border-left:7px solid #86868b;border-right:0;transform:translateY(-50%)}
  .stage-note{font-size:15px}
}

/* ---------- reward cards ---------- */
.rewards{display:grid;gap:16px;margin-top:20px}
.rcard{min-width:0;border-radius:28px;background:var(--band);padding:28px 20px 22px}
.rcard h4{margin:0;font:600 21px/1.2 var(--display);letter-spacing:-.01em}
.rcard p{margin:12px 0 0;font-size:15px;line-height:1.47;color:var(--ink2)}
.rcard p b{color:var(--ink);font-weight:600}
.rcard dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:16px 0 0;font-size:14px;line-height:1.4;color:var(--ink2)}
.rcard dt{color:var(--ink)}
.rcard dd{margin:0}
.band .rcard{background:var(--page)}
@media (min-width:900px){.rewards{grid-template-columns:1fr 1fr;gap:20px}.rcard{padding:36px 32px 30px}}

/* ---------- big-number tiles ---------- */
.stats{display:grid;gap:16px;margin-top:56px}
.stat{border-radius:28px;background:var(--band);padding:28px 24px}
.stat .v{display:block;font:600 52px/1 var(--display);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat p{margin:14px 0 0;font-size:15px;line-height:1.47;color:var(--ink2)}
.stat p b{color:var(--ink);font-weight:400}
.band .stat{background:var(--page)}
.stats.stats-in{margin-top:28px}
@media (min-width:900px){.stats{grid-template-columns:repeat(3,1fr);gap:20px;margin-top:80px}.stat{padding:36px 32px}.stat .v{font-size:72px}.stat p{font-size:17px}}

/* device-style frame around the main simulation clip */
.frame-wrap{margin-top:64px;display:flex;justify-content:center}
.frame{width:calc(100% - 16px);max-width:1360px;padding:10px;border-radius:44px;background:var(--fill)}
.frame .ph{aspect-ratio:1/1;border-radius:34px;background:#2a4867}
@media (min-width:735px){.frame-wrap{margin-top:88px}.frame{padding:14px;border-radius:64px}.frame .ph{aspect-ratio:2/1;border-radius:50px}.frame .vbtn{right:28px;bottom:28px}.frame .tag{left:28px;top:24px}}

.figs{display:grid;gap:16px;margin-top:20px}
@media (min-width:1069px){.figs{grid-template-columns:1fr 1fr;gap:20px}}

/* ---------- hardware: run procedure ---------- */
.run-step h4{margin:12px 2px 0;font:600 15px/1.3 var(--display);letter-spacing:-.01em}
.run-step h4 span{display:inline-block;min-width:1.4em;color:var(--ink2);font-family:var(--mono);font-weight:500}
.run-step p{margin:4px 2px 0;font-size:13px;line-height:1.4;color:var(--ink2)}
.run-note{margin-block:22px 0;font-size:14px;line-height:1.5;color:var(--ink2)}

/* control software: four columns */
.stack{margin-top:40px}
.stack .chain>li ul{margin:10px 0 0;padding:0;list-style:none;display:grid;gap:6px}
.stack .chain>li ul li{padding:8px 10px;border-radius:10px;background:var(--page);font-size:13px;line-height:1.35;color:var(--ink)}
.stack .chain>li ul li i{font-style:normal;color:var(--ink2)}
@media (min-width:900px){.stack .chain{grid-template-columns:1fr .8fr 1.5fr 1.1fr;grid-auto-flow:row}}

/* ---------- explorers: one panel at a time, picked from a segmented bar or a figure ---------- */
.narrow{max-width:var(--mid);margin-inline:auto}
.seg{position:relative;display:flex;gap:4px;width:max-content;max-width:100%;margin:0 auto 32px;padding:4px;border-radius:999px;background:var(--fill);overflow-x:auto;scrollbar-width:none}
.seg::-webkit-scrollbar{display:none}
.seg [role=tab]{flex:none;height:36px;padding:0 16px;border:0;border-radius:999px;background:none;font:500 14px/1 var(--text);letter-spacing:0;color:var(--ink2);white-space:nowrap;transition:background .25s var(--ease),color .25s var(--ease)}
.seg [role=tab]:hover{color:var(--ink)}
.seg [role=tab][aria-selected=true]{background:var(--page);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
html:not(.js) .seg{display:none}
html:not(.js) .tabpanel+.tabpanel{margin-top:56px}
.js .tabpanel:not(.on){display:none}
.js .tabpanel.on{animation:panel-in .45s var(--ease)}
@keyframes panel-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.tabpanel>.rcard{max-width:760px;margin-inline:auto}
.tabpanel>.rewards{margin-top:0}
.panel-lede{margin:0 auto 28px;max-width:44em;text-align:center;font-size:17px;line-height:1.47;color:var(--ink2);text-wrap:balance}
.panel-lede b{color:var(--ink);font-weight:400}
.tab-next{display:flex;align-items:center;gap:6px;min-height:44px;margin:28px auto 0;padding:0 4px;border:0;background:none;color:var(--blue);font-size:17px}
.tab-next:hover{text-decoration:underline}
@media (min-width:735px){.seg{margin-bottom:44px}.seg [role=tab]{height:40px;padding:0 20px;font-size:15px}.panel-lede{font-size:19px;margin-bottom:36px}}

/* the pipeline figure: each block is a button over the image; phones scroll it sideways */
.fig-scroll{overflow-x:auto;margin-bottom:28px;padding:20px;border-radius:28px;background:#fff;overscroll-behavior-x:contain}
.fig-map{position:relative;min-width:720px}
.fig-map img{width:100%;height:auto}
.hot-area{position:absolute;display:block;padding:0;border:0;border-radius:12px;background:transparent;cursor:pointer;transition:background .2s var(--ease),box-shadow .2s var(--ease)}
.hot-area:hover{background:rgba(0,113,227,.06);box-shadow:0 0 0 2px rgba(0,113,227,.5);text-decoration:none}
.hot-area.on{box-shadow:0 0 0 3px var(--blue)}
.hot-area.sub{border-radius:8px}
.fig-hint{display:none;margin:-16px 0 24px;text-align:center;font-size:13px;color:var(--ink2)}
@media (max-width:734px){.fig-scroll{padding:12px;border-radius:18px}.fig-hint{display:block}}

/* horizontal tracks of cards with a counter and arrows */
.scroller-bar{display:flex;align-items:center;gap:8px;margin-bottom:14px}
.scroller-bar .count{margin-right:auto;font:500 13px/1 var(--mono);color:var(--ink2);font-variant-numeric:tabular-nums}
.scroller.fits .scroller-bar{display:none}
html:not(.js) .scroller-bar{display:none}
.arw{width:36px;height:36px;padding:0;border:0;border-radius:50%;background:var(--fill);color:var(--ink);display:grid;place-items:center}
.arw:hover{background:var(--hair)}
.arw:disabled{opacity:.35;cursor:default;background:var(--fill)}
.arw svg{width:16px;height:16px}
.strack{position:relative;display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-x:contain;scrollbar-width:none;counter-reset:st}
.strack::-webkit-scrollbar{display:none}
.strack>*{flex:0 0 min(86%,440px);scroll-snap-align:start}
.strack>.step{transition:box-shadow .3s var(--ease)}
.strack>.step.flash{box-shadow:0 0 0 2px var(--blue)}
.strack.photos>*{flex-basis:min(78%,360px)}
.strack.photos .ph{aspect-ratio:4/3;border-radius:18px}
.strack.photos figcaption{margin:8px 2px 0;font-size:13px;line-height:1.4;color:var(--ink2)}
.strack.photos figcaption span{font-family:var(--mono);color:var(--ink)}
.strack.runs>*{flex-basis:min(44vw,196px)}
/* palm iterations: same-size cards, each figure fitted inside a white plate */
.strack.iters>*{flex-basis:min(84%,400px)}
.iter-media{position:relative;aspect-ratio:4/3;border-radius:18px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.07);overflow:hidden}
.iter-media>img{position:absolute;inset:14px;width:calc(100% - 28px);height:calc(100% - 28px);object-fit:contain}
.iter-media.tbl{display:flex;align-items:center;padding:10px 12px}
.iter-media>img{cursor:zoom-in}
.iter-media:has(>img)::after{content:"";position:absolute;right:10px;bottom:10px;width:30px;height:30px;border-radius:50%;background:rgba(232,232,237,.92) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M9.5 2.5h4v4M6.5 13.5h-4v-4M13.5 2.5L9 7M2.5 13.5L7 9' fill='none' stroke='%231d1d1f' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat;pointer-events:none}
.iters figcaption{margin:12px 2px 0;font-size:14px;line-height:1.45;color:var(--ink2)}
.iters figcaption b{color:var(--ink);font-weight:600}
.iters .it{display:block;margin-bottom:5px;font:600 12px/1 var(--mono);letter-spacing:.04em;text-transform:uppercase;color:var(--ink)}
/* a small heat table: the value in every cell, the colour only as a second cue */
.hold{width:100%;border-collapse:separate;border-spacing:3px;font:500 12px/1 var(--mono);font-variant-numeric:tabular-nums;color:var(--ink)}
.hold th{padding:6px 2px;font:600 11px/1.15 var(--text);color:var(--ink2);text-align:center}
.hold th small{display:block;font-weight:400;font-size:10px}
.hold th.axes{text-align:left;font-size:10px;font-weight:500;white-space:nowrap}
.hold tbody th{text-align:right;padding-right:6px;color:var(--ink);font-family:var(--mono);font-weight:600}
.hold td{padding:9px 2px;border-radius:5px;text-align:center}
@media (max-width:420px){.hold{border-spacing:2px;font-size:11px}.hold td{padding:7px 1px}}
.run-step .ph{aspect-ratio:3/4;border-radius:18px}
@media (min-width:735px){.strack{gap:16px}.strack.photos figcaption{font-size:14px}}
.model.in-panel{margin-top:0}
.band .model{background:var(--page)}
.band .model .step{background:var(--band)}

/* closed by default: detail a reader can open */
details.more{margin-top:40px;padding:0 20px;border-radius:28px;background:var(--band)}
.band details.more{background:var(--page)}
details.more>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;padding:22px 4px;cursor:pointer}
details.more>summary::-webkit-details-marker{display:none}
details.more>summary>span{display:flex;flex-direction:column;gap:4px;font-size:15px;line-height:1.4;color:var(--ink2)}
details.more>summary b{font:600 21px/1.2 var(--display);letter-spacing:-.01em;color:var(--ink)}
details.more>summary svg{flex:none;width:20px;height:20px;color:var(--ink2);transition:transform .35s var(--ease)}
details.more[open]>summary svg{transform:rotate(180deg)}
details.more[open]{padding-bottom:20px}
details.more .rcard{background:var(--page)}
.band details.more .rcard,.band details.more .tile{background:var(--band)}
details.more .figs{margin-top:0}
details.more .stage{background:var(--page)}
details.more .stage .chain>li{background:var(--band);box-shadow:none}
details.more .stage .chain>li.hot{box-shadow:0 0 0 2px var(--blue)}
.band details.more .stage{background:var(--band)}
.band details.more .stage .chain>li{background:var(--page)}
.band details.more .stack .chain>li ul li{background:var(--band)}
@media (min-width:735px){details.more{padding:0 32px}details.more>summary{padding:28px 4px}details.more>summary b{font-size:24px}details.more[open]{padding-bottom:32px}}

/* the palm-model animation: plays inline on a white plate, with chapter jumps below */
.anim{position:relative;aspect-ratio:16/9;border-radius:28px;overflow:hidden;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.05)}
.anim video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#fff}
.chapters{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:20px}
.chapters button{height:36px;padding:0 16px;border:0;border-radius:999px;background:var(--fill);color:var(--ink2);font:500 14px/1 var(--text);letter-spacing:0;transition:background .25s var(--ease),color .25s var(--ease)}
.chapters button:hover{color:var(--ink)}
.chapters button[aria-pressed=true]{background:var(--ink);color:#fff}
#closer .cap{text-align:center;max-width:52em;margin-inline:auto}
.anim-scroll{overflow-x:auto;overscroll-behavior-x:contain;border-radius:28px}
@media (max-width:734px){.anim-scroll{border-radius:18px}.anim{min-width:680px;border-radius:18px}.anim-hint{margin:12px 0 0}.chapters button{height:34px;padding:0 13px;font-size:13px}}

/* results: a task label over each task's heading */
.task-head .lede{margin-top:16px}

/* supplementary: collapsed blocks at the end of the page */
#supp .hl-head{margin-bottom:8px}
#supp details.more .stack{margin-top:24px}
#supp .run-note{margin-bottom:0}
.squat-pair{max-width:640px;margin:32px auto 0}

/* ---------- a figure opened larger ---------- */
.lightbox{max-width:min(1240px,94vw);max-height:92vh;padding:0;border:0;border-radius:18px;background:#fff;box-shadow:0 30px 80px rgba(0,0,0,.25);overflow:hidden}
.lightbox::backdrop{background:rgba(0,0,0,.55);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.lightbox img{display:block;width:auto;height:auto;max-width:min(1240px,94vw);max-height:92vh;object-fit:contain}
.lb-close{position:absolute;top:12px;right:12px;width:38px;height:38px;padding:0;border:0;border-radius:50%;background:rgba(232,232,237,.92);color:var(--ink);display:grid;place-items:center}
.lb-close:hover{background:var(--hair)}
.lb-close svg{width:14px;height:14px}

/* ---------- status key at the end of the page ---------- */
.keys{display:grid;gap:16px;margin-top:40px}
.key{display:flex;align-items:flex-start;gap:18px;border-radius:28px;background:var(--band);padding:26px 24px}
.key>.mk{width:24px;height:24px;margin-top:1px;box-shadow:inset 0 0 0 2.5px var(--mk)}
.key h3{margin:0;font:600 21px/1.2 var(--display);letter-spacing:-.01em}
.key p{margin:8px 0 0;font-size:15px;line-height:1.47;color:var(--ink2)}
.key .key-items{color:var(--ink);font-weight:500}
@media (min-width:900px){.keys{grid-template-columns:1fr 1fr;gap:20px}.key{padding:32px 30px}}

/* ---------- notes, team, footer ---------- */
.notes{padding-block:48px 40px;border-top:1px solid var(--hair);font-size:12px;line-height:1.5;color:var(--ink2)}
.notes ol{margin:0;padding-left:1.4em;display:grid;gap:10px}
.notes a{word-break:break-word}
.team{text-align:center}
.team h2{margin:0 auto;max-width:22ch;font:600 30px/1.14 var(--display);letter-spacing:-.01em;text-wrap:balance}
.authors{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 22px;margin:28px auto 0;max-width:680px;font-size:17px;line-height:1.6;color:var(--ink)}
.authors>*{white-space:nowrap}
.authors a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--hair);text-underline-offset:3px}
.authors a:hover{text-decoration-color:var(--ink)}
.authors sup,.affil sup,.affil-note sup{font-size:.64em;line-height:0;vertical-align:.62em;margin-left:1px;color:var(--ink2)}
.affil{display:flex;flex-wrap:wrap;justify-content:center;gap:2px 20px;margin:10px 0 0;font-size:15px;color:var(--ink2)}
.affil sup{margin:0 2px 0 0}
.affil-note{margin:6px 0 0;font-size:13px;color:var(--ink2)}
.affil-note sup{margin:0 2px 0 0}
.btns{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:36px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-width:96px;height:44px;padding:0 22px;border-radius:999px;font-size:17px;border:1px solid var(--blue);color:var(--blue)}
.btn.solid{background:var(--blue);color:#fff}
.btn:hover{text-decoration:none;background:var(--blue);color:#fff}
.btn.off{border-color:var(--hair);color:var(--ink2);cursor:default}
.btn.off:hover{background:none;color:var(--ink2)}
.cite-note{margin:56px auto 0;max-width:760px;text-align:left;background:var(--band);border-radius:18px;padding:22px 24px;font-size:15px;line-height:1.5;color:var(--ink2)}
.cite-note b{display:block;margin-bottom:4px;font:600 15px/1.3 var(--display);color:var(--ink)}
@media (min-width:735px){.team h2{font-size:40px}.cite-note{padding:26px 32px}}
footer{padding:28px 0 40px;border-top:1px solid var(--hair);font-size:12px;line-height:1.6;color:var(--ink2)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px}
footer a{color:var(--ink2);text-decoration:underline;text-underline-offset:2px}

/* ---------- reveal ---------- */
.js .rv{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .rv{opacity:1;transform:none;transition:none}
  .dot,.dot i,.qtile,details.more>summary svg,.hot-area,.seg [role=tab],.chapters button{transition:none}
  .js .tabpanel.on{animation:none}
  .wip-dot::after{animation:none}
}