/* Specialist landing page. Layout on top of efm.css tokens (Endfield Minimal, dark by default).
   Layout concept: one 1200px column; each section opens with an eyebrow + title on the left and a short
   paragraph on the right, then one exhibit (a video player, a diagram, or a row of cards). */

.navl.ext::after{content:" ↗";letter-spacing:0}
.sec{border-top:1px solid var(--rule);padding-block:72px 48px}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px 48px}
.sec-head .body{max-width:520px}
.sec-body{display:flex;flex-direction:column;gap:36px;padding-top:36px}
.body+.body{margin-top:12px}
.efs-pair__title{text-wrap:balance}

/* Logo mark. Dark theme: a black body with a white outline. The outline is a stroke drawn under both the body and
   the yellow tips (the union of the two shapes), so it runs unbroken around the whole mark; the fills cover its inner half. */
.mark-outline{fill:none;stroke:var(--ink);stroke-width:48px;stroke-linejoin:round}
.mark-body{fill:var(--paper)}
.efm-light .mark-outline{display:none}
.efm-light .mark-body{fill:var(--ink)}

/* Gripper colors by hand, as the reconstruction videos draw them: left vermilion, right blue (the specialist viz
   layer's slot palette). Light theme: a shade darker, so the labels keep 4.5:1 on white. */
:root{--left:#EC380C;--right:#1884B4}
.efm-light{--left:#D4320B;--right:#1673A0}
.s-left{stroke:var(--left)}.f-left{fill:var(--left)}.s-right{stroke:var(--right)}.f-right{fill:var(--right)}

/* Hero */
.hero{padding-block:88px 36px;display:flex;flex-direction:column;gap:26px}
/* Subtitle: part of the paper title, so it uses the wordmark's typeface (Figtree), at regular weight. */
.hero .sub{margin:-14px 0 0;font:400 clamp(24px, 3.4vw, 44px)/1.12 var(--font-heading);letter-spacing:-0.01em;color:var(--ink);text-wrap:balance}
.hero .lead{text-wrap:balance}
/* "Copying inspired by [Generalist]": same line as the handout. The logo is a white PNG used as a mask, so it takes the theme ink. */
.hero .by{margin:-12px 0 0;display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;font:600 13px/20px var(--font-display);letter-spacing:0.14em;text-transform:uppercase;color:var(--signal-text)}
.hero .by s{text-decoration-thickness:1.5px}
/* Light theme: yellow text would not read on white, so the words sit on a yellow highlight instead. */
.efm-light .hero .by > span{background:var(--signal);color:var(--on-signal);padding:2px 4px 2px 7px}
.hero .gen{display:inline-flex;align-items:center;min-height:32px;color:var(--ink)}
.hero .gen-logo{display:block;height:19px;aspect-ratio:332/50;background:currentColor;-webkit-mask:url(img/generalist-logo.png) center/contain no-repeat;mask:url(img/generalist-logo.png) center/contain no-repeat;transition:background-color var(--dur-fast)}
.hero .gen:hover{color:var(--ink-2)}
.hero .gen:focus-visible{outline:2px solid var(--signal-text);outline-offset:4px}
.hero .body{max-width:640px;font-size:17px;line-height:27px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 24px}
.hero-actions .efs-btn{text-decoration:none}
.hero-ctas{display:flex;flex-direction:column;gap:18px}
.hero-actions .btn-soon{font:500 13px/1 var(--font-tech);letter-spacing:0.04em}
.soon{font:500 13px/18px var(--font-tech);color:var(--ink-3);letter-spacing:0.04em}
.authors{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 22px;padding-top:6px;font-size:15px}
.authors .aff{flex-basis:100%;font:500 13px/18px var(--font-tech);color:var(--ink-2)}
/* Each name links to the author's website, in the same text style. An underline on hover shows the link:
   white in the dark theme (the ink color), and ink in the light theme, where white would not show. */
.authors a{color:inherit;text-decoration:underline;text-decoration-color:transparent;text-decoration-thickness:1px;text-underline-offset:4px;transition:text-decoration-color var(--dur-fast)}
.authors a:hover{text-decoration-color:var(--ink)}
.authors a:focus-visible{outline:none;box-shadow:var(--focus-ring)}
.hero-media{padding-bottom:12px}

/* Video frame: one look for every clip on the page */
.frame{position:relative;margin:0;background:#000;aspect-ratio:16/9;max-width:100%;overflow:hidden}
.frame video{display:block;width:100%;height:100%;object-fit:contain;background:#000}
.frame .badge{z-index:1;pointer-events:none}
.frame .b-l{left:12px;top:12px;background:var(--label);color:var(--on-label)}
.frame .b-r{right:12px;top:12px;background:var(--signal);color:var(--on-signal)}
.frame .b-b{left:12px;bottom:12px;background:rgba(0,0,0,0.72);color:#ffffff;letter-spacing:0.02em}
.cap{margin:10px 0 0;font-size:14px;line-height:21px;color:var(--ink-2);max-width:760px}

/* Compare slider: phone video on the left, reconstruction on the right */
.cmp-frame{position:relative;aspect-ratio:16/9;max-width:100%;overflow:hidden;background:#000 center/cover no-repeat;user-select:none;-webkit-user-select:none;cursor:ew-resize;touch-action:pan-y}
.cmp-src{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 0;pointer-events:none}
.cmp-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity 0.2s}
.cmp-canvas.on{opacity:1}
.cmp-frame .badge{z-index:2;pointer-events:none;transition:opacity 0.15s}
.cmp-frame .b-l,.frame .b-l{left:12px;top:12px;background:var(--label);color:var(--on-label)}
.cmp-frame .b-r{right:12px;top:12px;background:var(--signal);color:var(--on-signal)}
.cmp-frame .b-b{left:12px;bottom:12px;background:rgba(0,0,0,0.72);color:#ffffff}
.cmp-line{position:absolute;top:0;bottom:0;width:2px;margin-left:-1px;background:var(--signal);z-index:2;pointer-events:none}
.cmp-knob{position:absolute;top:50%;left:50%;width:36px;height:36px;transform:translate(-50%,-50%);background:var(--signal);display:grid;place-items:center}
.cmp-range{position:absolute;left:0;bottom:0;width:1px;height:1px;margin:0;padding:0;opacity:0;overflow:hidden;pointer-events:none}
.cmp-frame:focus-within .cmp-knob{box-shadow:var(--focus-ring)}
.cmp-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px;padding-top:14px}
.cmp-tasks{display:flex;flex-wrap:wrap;gap:8px}

/* Solve view: phone + 3D on top, four lens views below */
.solve-frame{position:relative}
.solve-frame .frame{aspect-ratio:1600/850}
.solve-l{position:absolute;z-index:1;pointer-events:none;background:rgba(0,0,0,0.72);color:#ffffff;font:500 11px/16px var(--font-tech);letter-spacing:0.03em;padding:1px 6px;max-width:24%;box-sizing:border-box}
.legend .d-feat{width:8px;height:8px;border-radius:50%;background:#ff00ff}
.legend .d-reproj{width:10px;height:10px;border-radius:50%;border:2px solid #50c878;box-sizing:border-box}

/* Hardware: specs beside a turning hidden-line drawing of the CAD */
.hw{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:24px 40px;align-items:center}
.hw-dl{display:grid;grid-template-columns:max-content minmax(0,1fr);margin:20px 0 0;border-top:var(--stroke-rule) solid var(--label)}
.hw-dl dt{white-space:nowrap;padding-right:16px}
.hw-dl dt,.hw-dl dd{margin:0;padding:12px 0;border-bottom:1px solid var(--rule)}
.hw-dl dt{padding-top:15px}
.hw-dl dd{font:500 17px/24px var(--font-tech);font-variant-numeric:tabular-nums;color:var(--ink);text-align:right;padding-left:16px}
.hw-stage{position:relative;aspect-ratio:1/1;max-width:100%;overflow:hidden;cursor:grab;touch-action:pan-y;background:transparent}
/* A dot grid that fades out toward the edges, so the drawing sits on the page with no visible frame. */
.hw-stage::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(var(--rule) 1px,transparent 1.2px);background-size:var(--dot-pitch) var(--dot-pitch);-webkit-mask-image:radial-gradient(closest-side,#000 35%,transparent 100%);mask-image:radial-gradient(closest-side,#000 35%,transparent 100%)}
.hw-stage.grabbing{cursor:grabbing}
.hw-stage canvas{position:absolute;inset:0;display:block;width:100%;height:100%}
.hw-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.hw-lab{position:absolute;left:0;top:0;display:flex;align-items:center;gap:6px;white-space:nowrap;transition:opacity 0.1s;will-change:transform}
.hw-lab i{display:block;width:7px;height:7px;margin:-3.5px 0 0 -3.5px;background:var(--signal);border-radius:50%;flex:none}
.hw-lab b{font:500 11px/14px var(--font-tech);letter-spacing:0.03em;color:var(--ink);background:var(--paper);border:1px solid var(--rule);padding:2px 6px}
.hw-status{position:absolute;inset:0;display:grid;place-items:center;padding:24px;text-align:center;font:500 12px/18px var(--font-tech);letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-2)}
/* "Drag to rotate" sits centered under the drawing; the Assembled/Exploded switch (actuated only) sits at the right. */
.hw-ctl{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:12px;padding-top:4px}
.hw-ctl .soon{grid-column:2;grid-row:1;text-align:center}
.hw-ctl>:not(.soon){grid-column:3;grid-row:1;justify-self:end}

/* Stats row */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;padding-top:30px;border-top:1px solid var(--rule)}

/* Gallery: one player and the list of clips */
.gallery{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:24px;align-items:start}
.glist{display:flex;flex-direction:column;border-top:var(--stroke-rule) solid var(--label)}
.glist .rowb{grid-template-columns:minmax(0,1fr) auto;padding-block:10px;min-height:52px}
.glist .rowb .t{font-size:15px;line-height:20px}
.glist .rowb .m{font:500 12px/16px var(--font-tech);color:var(--ink-2)}
.glist .rowb .k{font:500 12px/16px var(--font-tech);color:var(--ink-3);text-align:right;white-space:nowrap}
.glist .rowb.on .k{color:var(--signal-text)}

/* Legend */
.legend{display:flex;flex-wrap:wrap;gap:10px 24px;font-size:13px;color:var(--ink-2)}
.legend span{display:inline-flex;align-items:center;gap:8px}
.legend i{display:inline-block;width:22px;height:3px}
/* The reconstruction videos' colors (specialist viz layer): grippers by hand, anchor tags amber, gripper tags cyan. */
.legend .l-y{background:#FFD200}.legend .l-c{background:#5ADCDC}.legend .l-left{height:12px;width:12px;background:#EC380C}.legend .l-right{height:12px;width:12px;background:#1884B4}

/* Table IV */
.tbl{overflow-x:auto}
.tbl table{min-width:560px;width:100%}
.props{display:flex;flex-wrap:wrap;gap:6px 18px;font:500 12px/18px var(--font-tech);color:var(--ink-2)}
.props b{color:var(--ink);font-weight:600}

/* Pipeline */
.pipe{display:flex;flex-direction:column;gap:22px}
.pipe-top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px}
.pipe-ctl{display:flex;gap:12px;align-items:center}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.stepb{display:flex;flex-direction:column;gap:8px;align-items:flex-start;min-height:44px;padding:0;border:0;background:transparent;color:var(--ink);cursor:pointer;text-align:left;font:inherit}
.stepb .bar{display:block;width:100%;height:4px;background:var(--rule);position:relative;overflow:hidden}
.stepb .bar span{position:absolute;inset:0;transform-origin:left center;background:var(--ink)}
.stepb .no{font:500 12px/1 var(--font-tech);color:var(--ink-2)}
.stepb .nm{font-size:17px;line-height:22px}
.stepb[aria-current="step"] .nm{font-weight:700}
.pipe-main{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:36px;align-items:start}
.pipe-main .stage{width:100%;max-width:100%;aspect-ratio:720/460}
.pipe-main .stage svg{display:block;width:100%;height:100%}
.pipe-text{display:flex;flex-direction:column;gap:14px}
.pipe-text .big{font:500 56px/1 var(--font-tech);color:var(--ink-3)}
.pipe-text h3{margin:0;font-size:26px;line-height:30px;font-weight:700}
.pipe-text dl{margin:6px 0 0;display:grid;grid-template-columns:56px minmax(0,1fr);gap:10px 12px;font-size:14px;line-height:20px}
.pipe-text dt{padding-top:2px}
.pipe-text dd{margin:0}
/* Method stages: real session data drawn as sketches. Measurements (tags, sightings) are yellow on dark and ink over a yellow fill on light. */
.pipe-title{display:flex;flex-direction:column;gap:6px;min-width:0;max-width:640px}
.pipe-facts,.pipe-code{display:flex;flex-direction:column;gap:8px;padding-top:12px;border-top:1px solid var(--rule)}
.pipe-facts dl{margin:0;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 16px;font-size:14px;line-height:20px}
.pipe-facts dt{color:var(--ink-2)}
.pipe-facts dd{margin:0;font:500 14px/20px var(--font-tech);font-variant-numeric:tabular-nums;color:var(--ink);text-align:right}
.pipe-code code{display:flex;flex-direction:column;gap:2px;font:500 12px/18px var(--font-tech);color:var(--ink);background:var(--panel);padding:10px 12px;overflow-wrap:anywhere}
.pipe-code code span{white-space:pre-wrap}
.stage text{font-family:var(--font-sans)}
.stage .m-mono{font-family:var(--font-tech);font-variant-numeric:tabular-nums}
.stage{--m-ray:var(--signal);--m-tagfill:rgba(243,230,0,0.28);--m-tagline:var(--signal)}
.efm-light .stage{--m-ray:var(--ink);--m-tagfill:rgba(243,230,0,0.75);--m-tagline:var(--ink)}
.m-ray{stroke:var(--m-ray)}
.m-tag{fill:var(--m-tagfill);stroke:var(--m-tagline)}
.stage .m-halo{paint-order:stroke;stroke:var(--panel);stroke-width:4px;stroke-linejoin:round}
.drawp{stroke-dasharray:1;stroke-dashoffset:1;animation:k-draw 1.5s var(--ease-snap) forwards}
.m-in{opacity:0;animation:k-fade 0.45s var(--ease-out) forwards}
.m-photo{opacity:0;animation:m-photo 1.6s var(--ease-out) forwards}
@keyframes m-photo{to{opacity:var(--op)}}
/* The step's video (or still) sits under its drawing, so each step reads as one unit. */
.pipe-left{display:flex;flex-direction:column;gap:18px;min-width:0}
.pipe-media{margin:0;display:flex;flex-direction:column;gap:10px;min-width:0}
.pipe-media figcaption{font-size:14px;line-height:21px;color:var(--ink-2)}
.pipe-media figcaption b{color:var(--ink);font-weight:700;margin-right:4px}
.pipe-media .still{background:#000;padding:0}
.pipe-media .still img{display:block;width:100%;height:auto}
.m-shift{animation:m-shift 1.2s var(--ease-snap) 2.2s forwards}
@keyframes m-shift{to{transform:translateX(var(--dx))}}
@media (prefers-reduced-motion: reduce){
  .drawp{stroke-dashoffset:0}
  .m-in{opacity:1}
  .m-shift{transform:translateX(var(--dx))}
  .m-photo{opacity:var(--op)}
}

/* Media cards */

/* Numbers */
.nums{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}
.ncard{display:flex;flex-direction:column;gap:14px;padding:20px 20px 22px;background:var(--panel);box-shadow:inset 0 var(--stroke-bar) 0 var(--rule)}
.ncard .efs-stat__num{font-size:44px}
.ncard ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--rule);padding-top:12px}
.ncard li{font-size:14px;line-height:20px;color:var(--ink-2)}
.ncard li b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}

/* Build: the gripper drawings are gray outlines (a PNG alpha used as a mask), so they take the theme's gray */
.builds{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:48px 40px}
.bcard{display:flex;flex-direction:column;gap:8px;min-width:0}
.bart{position:relative;display:block;aspect-ratio:4/3}
.bart::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(var(--rule) 1px,transparent 1.2px);background-size:var(--dot-pitch) var(--dot-pitch);-webkit-mask-image:radial-gradient(closest-side,#000 35%,transparent 100%);mask-image:radial-gradient(closest-side,#000 35%,transparent 100%)}
.bart-img{position:absolute;inset:4% 6%;background:var(--ink-2);-webkit-mask:var(--src) center/contain no-repeat;mask:var(--src) center/contain no-repeat;transition:background-color var(--dur-base)}
.bart:hover .bart-img{background:var(--ink)}
.bart:focus-visible{outline:none;box-shadow:var(--focus-ring)}
.bcard .in{display:flex;flex-direction:column;gap:20px;container-type:inline-size}
.bhead{display:flex;flex-direction:column;gap:6px}
.bcard h3{margin:0;font-size:24px;line-height:30px;font-weight:700}
.bspec{display:grid;grid-template-columns:repeat(5,max-content);justify-content:space-between;column-gap:16px;margin:0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.bspec div{display:flex;flex-direction:column;gap:6px;padding:14px 0}
.bspec dt{letter-spacing:0.1em;white-space:nowrap}
@container (max-width:520px){.bspec{grid-template-columns:repeat(3,minmax(0,1fr));justify-content:stretch}}
.bspec dd{margin:0;font:500 20px/24px var(--font-tech);font-variant-numeric:tabular-nums;color:var(--ink);white-space:nowrap}
.bact .efs-btn{text-decoration:none}
.bfiles{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));column-gap:24px}
.bfiles a{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:44px;border-bottom:1px solid var(--rule);color:var(--ink);text-decoration:none;font-size:15px;transition:color var(--dur-fast)}
.bfiles a span{color:var(--ink-3);transition:color var(--dur-fast),transform var(--dur-fast)}
.bfiles a:hover{color:var(--ink-2)}
.bfiles a:hover span{color:var(--signal-text);transform:translate(2px,-2px)}
.bfiles a:focus-visible{outline:none;box-shadow:var(--focus-ring)}
.also{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 24px;font-size:15px}
.release{max-width:760px}

/* Footer */
.foot{border-top:1px solid var(--rule)}
.foot .wrap{padding-block:18px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px}

@media (max-width:900px){
  .hw{grid-template-columns:minmax(0,1fr)}
  .hw-view{order:-1}
  .gallery{grid-template-columns:minmax(0,1fr)}
  .pipe-main{grid-template-columns:minmax(0,1fr);gap:20px}
  .pipe-text .big{font-size:40px}
  /* One column: the drawing, then the words, then the video. */
  .pipe-left{display:contents}
  .pipe-main .stage{order:0}
  .pipe-text{order:1}
  .pipe-media{order:2}
}
@media (max-width:640px){
  .solve-l{display:none}
  /* Phone header: only the logo and the theme switch. */
  .site-nav{display:none!important}
  .site-head{justify-content:space-between}
  .hw-ctl{grid-template-columns:minmax(0,1fr)}
  .hw-ctl .soon,.hw-ctl>:not(.soon){grid-column:1;grid-row:auto;justify-self:center}
  .cmp-frame .b-b{display:none}
  .hero{padding-top:48px}
  .sec{padding-block:56px 36px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  /* Method stages scale to about half size on a phone: larger labels, minor labels hidden. */
  .stage .m-t{font-size:19px}
  .stage .m-s{font-size:17px}
  .stage .m-min{display:none}
  .stage .m-tab{display:none}
  .efs-btn--lg{min-width:0}
  .ncard .efs-stat__num{font-size:36px}
}