/* Entiti / Graph Lab — technical workbench. Light graphite canvas, black ink, ultraviolet accent. */
:root{
  --ink:#14161a;
  --ink-2:#3c424a;
  --graphite:#e9ebee;
  --graphite-2:#f3f4f6;
  --paper:#fbfbfc;
  --white:#ffffff;
  --line:#c3c7cd;
  --line-soft:#d8dbe0;
  --uv:#5b2bd6;
  --uv-deep:#3f1c9e;
  --cobalt:#0b4ecb;
  --cobalt-deep:#093a94;
  --warn:#7a4c00;
  --err:#9b1c1c;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"Helvetica Neue",Helvetica,Arial,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:Georgia,"Times New Roman",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--graphite);color:var(--ink);font:400 17px/1.6 var(--sans);text-rendering:optimizeLegibility}
img,video,svg,canvas{max-width:100%;height:auto;display:block}
img.beacon{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
main,article,section,aside,fieldset,figure{min-width:0}
a{color:var(--cobalt);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1.5px}
a:hover{color:var(--cobalt-deep);text-decoration-thickness:2px}
a:visited{color:var(--uv-deep)}
a,td,th,figcaption,li{overflow-wrap:anywhere}
:focus-visible{outline:3px solid var(--uv);outline-offset:2px}
::selection{background:#ded3fb;color:var(--ink)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 14px;z-index:80;font:600 14px var(--mono)}
.skip-link:focus{left:8px;top:8px;color:#fff}
[hidden]{display:none!important}

/* Page shells */
.page{max-width:1160px;margin:0 auto;padding:0 clamp(16px,4vw,44px)}
.article,.article-body,.sources{max-width:70ch}

/* Header */
.site-header{background:var(--paper);border-bottom:1px solid var(--ink);position:sticky;top:0;z-index:30}
.header-inner{max-width:1160px;margin:0 auto;padding:14px clamp(16px,4vw,44px);display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 28px;justify-content:space-between}
.brand{font:700 19px/1.1 var(--mono);letter-spacing:-.01em;color:var(--ink);text-decoration:none;display:inline-flex;align-items:center;gap:9px}
.brand:hover{color:var(--uv-deep)}
.brand .mark,.brand svg{width:20px;height:20px;flex:none;color:var(--uv)}
nav.site-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:2px 22px;margin:0;padding:0;font:500 15px/1.4 var(--mono)}
nav.site-nav a{color:var(--ink-2);text-decoration:none;padding:6px 0;border-bottom:2px solid transparent;display:inline-block}
nav.site-nav a:hover{color:var(--ink);border-bottom-color:var(--uv)}
nav.site-nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--ink)}

/* Footer */
.site-footer{background:var(--paper);border-top:1px solid var(--ink);margin-top:64px}
.footer-inner{max-width:1160px;margin:0 auto;padding:24px clamp(16px,4vw,44px) 40px;display:flex;flex-wrap:wrap;gap:12px 28px;align-items:baseline;justify-content:space-between}
.footer-publisher{margin:0;font:400 14px/1.6 var(--mono);color:var(--ink-2)}
.footer-publisher a{color:var(--ink)}
nav.footer-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:4px 18px;margin:0;padding:0;font:400 14px/1.6 var(--mono)}
nav.footer-nav a{color:var(--ink-2);text-decoration:none}
nav.footer-nav a:hover{color:var(--uv-deep);text-decoration:underline}

/* Typography */
h1,h2,h3,h4{color:var(--ink);line-height:1.16;letter-spacing:-.012em;margin:0 0 .55em;font-weight:700;overflow-wrap:break-word}
h1{font-size:clamp(1.85rem,1.2rem + 2.9vw,3.15rem)}
h2{font-size:clamp(1.35rem,1.05rem + 1.3vw,1.95rem)}
h3{font-size:clamp(1.1rem,.98rem + .55vw,1.35rem)}
h4{font-size:1.02rem;font-family:var(--sans)}
p,ul,ol{margin:0 0 1em}
code,kbd,samp{font-family:var(--mono);font-size:.9em}
code{background:var(--graphite);border:1px solid var(--line-soft);padding:.08em .32em;color:var(--ink)}
pre{background:var(--ink);color:#f2f3f5;padding:16px 18px;overflow:auto;max-width:100%;font:400 14px/1.55 var(--mono);border-left:3px solid var(--uv)}
pre code{background:none;border:0;color:inherit;padding:0;font-size:inherit;white-space:pre;overflow-wrap:normal}
blockquote{border-left:3px solid var(--uv);margin:1.5em 0;padding:.2em 0 .2em 18px;color:var(--ink-2)}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* Home */
.home{padding-bottom:16px}
.workbench-mast{padding:clamp(30px,6vw,64px) 0 26px;border-bottom:1px solid var(--ink)}
.eyebrow{font:600 13px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--uv-deep);margin:0 0 14px}
.workbench-mast h1{max-width:19ch;margin-bottom:16px}
.lede{max-width:64ch;font-size:clamp(1.05rem,1rem + .4vw,1.22rem);color:var(--ink-2);margin:0 0 26px}
.mast-action{margin:0}
.action-link{display:inline-flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;text-decoration:none;border:1px solid var(--ink);background:var(--white);padding:12px 18px;color:var(--ink);font:600 15px/1.3 var(--mono)}
.action-link:hover{border-color:var(--uv-deep);color:var(--uv-deep)}
.action-verb{color:var(--ink)}
.action-path{font-weight:700;color:var(--uv-deep);text-decoration:underline;text-underline-offset:3px}
.action-note{font:400 13px/1.4 var(--mono);color:var(--ink-2)}

/* Figures */
figure,figure.article-figure{max-width:100%;margin:32px 0}
figure.article-figure picture{display:block}
figure img{width:100%;height:auto;max-height:56vh;object-fit:cover;background:var(--graphite-2)}
.article figure img{max-height:none;object-fit:contain}
figcaption,.media-caption{font:400 13px/1.55 var(--mono);color:var(--ink-2);padding:8px 0 0;border-top:1px solid var(--line-soft);margin-top:8px}
.media-caption-text{display:inline}
.media-credit{display:inline;margin-left:.4em;color:var(--ink-2)}
.media-credit a,.media-caption a{color:var(--cobalt-deep)}
.hero-figure{margin-top:0}
.hero-figure img{max-height:none;object-fit:cover}
.support-figure img{object-fit:contain}

/* Document/graph pair */
.label{font:600 12px/1.4 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin:0 0 8px}
.pair{padding:34px 0 8px;border-bottom:1px solid var(--line)}
.pair-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:start}
.pair-doc pre{margin:0}
.pair-graph .graph-figure{width:100%;height:auto;background:var(--white);border:1px solid var(--line);padding:6px}
.graph-figure .g-edge{stroke:var(--uv);stroke-width:2;fill:none}
.graph-figure .g-edge-label{font:400 12px var(--mono);fill:var(--ink-2)}
.graph-figure .g-node rect{fill:var(--white);stroke:var(--ink);stroke-width:1.75}
.graph-figure .g-node text{font:600 14px var(--mono);fill:var(--ink)}
.graph-figure .g-node .g-type{font:400 12px var(--mono);fill:var(--uv-deep)}
.graph-note{font:400 13px/1.5 var(--mono);color:var(--ink-2);margin:10px 0 0}

/* Steps */
.steps{padding:34px 0 10px;border-bottom:1px solid var(--line)}
.step-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.step-list li{padding:20px 22px 8px 0;border-right:1px solid var(--line)}
.step-list li:last-child{border-right:0;padding-right:0}
.step-list li+li{padding-left:22px}
.step-list h3{margin:0 0 .35em;font-family:var(--mono);font-size:1.02rem;letter-spacing:.02em}
.step-list h3::before{content:counter(step,decimal-leading-zero) " ";counter-increment:step;color:var(--uv-deep);font-weight:700}
.step-list{counter-reset:step}
.step-list p{margin:0;color:var(--ink-2);max-width:38ch}

/* Prose pair */
.prose-pair{display:grid;grid-template-columns:1.25fr .75fr;gap:36px;padding:36px 0 8px;border-bottom:1px solid var(--line)}
.prose-pair > div{max-width:64ch}
.bounds{background:var(--paper);border:1px solid var(--line);border-top:3px solid var(--uv);padding:20px 22px}
.bounds h3{margin:0 0 .5em;font-family:var(--mono);font-size:1rem;letter-spacing:.03em}
.bounds p{font-size:15px;line-height:1.65;color:var(--ink-2)}
.bounds p:last-child{margin-bottom:0}
.bounds a{color:var(--cobalt-deep)}
.linklist{padding-left:1.1em}
.linklist li{margin-bottom:.4em}

/* Closing */
.closing{border-top:1px solid var(--ink);margin-top:34px;padding-top:24px;max-width:66ch}
.closing h2{font-size:clamp(1.25rem,1.05rem + .8vw,1.6rem)}

/* Shared buttons / forms */
button,.btn{font:600 14px/1.3 var(--mono);color:#fff;background:var(--ink);border:1px solid var(--ink);padding:9px 15px;cursor:pointer;display:inline-block;text-decoration:none;border-radius:0}
button:hover,.btn:hover{background:var(--uv-deep);border-color:var(--uv-deep);color:#fff}
.btn-secondary,.btn:not(.btn-primary){background:var(--white);color:var(--ink);border-color:var(--ink)}
.btn-secondary:hover,.btn:not(.btn-primary):hover{background:var(--graphite);color:var(--ink);border-color:var(--uv-deep)}
button[disabled],.btn[aria-disabled="true"],input[disabled],textarea[disabled],select[disabled]{background:var(--graphite-2);color:var(--ink-2);border-color:var(--line);cursor:not-allowed;text-decoration:none}
fieldset{border:1px solid var(--line);border-radius:0;padding:16px 18px;margin:0 0 1.2em;min-width:0;background:var(--paper)}
legend{font:600 13px/1.3 var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:0 6px;color:var(--ink)}
label{display:block;font:600 13px/1.4 var(--mono);letter-spacing:.02em;margin:0 0 5px;color:var(--ink)}
input,textarea,select{font:400 15px/1.5 var(--mono);color:var(--ink);background:var(--white);border:1px solid var(--line);border-radius:0;padding:9px 11px;width:100%;max-width:100%}
input:focus,textarea:focus,select:focus{border-color:var(--uv);outline:2px solid var(--uv);outline-offset:0}
textarea{min-height:200px;resize:vertical}
output{display:block;font:400 14px/1.6 var(--mono);color:var(--ink)}
.tool-status,#graph-status{font:400 14px/1.55 var(--mono);border-left:3px solid var(--uv);background:var(--paper);padding:10px 14px;margin:1em 0;color:var(--ink);min-height:1em}
.tool-status[data-state="warn"],#graph-status[data-state="warn"]{border-left-color:var(--warn)}
.tool-status[data-state="error"],#graph-status[data-state="error"]{border-left-color:var(--err)}
details{border:1px solid var(--line);border-radius:0;padding:12px 15px;margin:1em 0;background:var(--paper)}
summary{cursor:pointer;font:600 14px/1.4 var(--mono)}
details[open] summary{margin-bottom:.6em}

/* Tables */
.table-scroll{overflow-x:auto;max-width:100%;border:1px solid var(--line);margin:1em 0}
table,.bench-table{border-collapse:collapse;width:100%;font-size:15px;table-layout:auto}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line-soft);vertical-align:top;overflow-wrap:anywhere}
th{font:600 12px/1.4 var(--mono);letter-spacing:.06em;text-transform:uppercase;background:var(--graphite-2);color:var(--ink)}
tbody tr:hover{background:#f2f0fd}

/* Article */
.breadcrumbs{font:400 13px/1.5 var(--mono);color:var(--ink-2);padding:18px 0 0}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.breadcrumbs a{color:var(--cobalt-deep)}
.article{padding:22px 0 40px}
.article-header{border-bottom:1px solid var(--ink);padding-bottom:18px;margin-bottom:28px}
.article-header .kicker{font:600 12px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--uv-deep);margin:0 0 10px}
.article-header h1{max-width:24ch}
.article-header .description{font-size:clamp(1.02rem,.98rem + .3vw,1.16rem);color:var(--ink-2);max-width:64ch;margin:10px 0 0}
.article-header .meta{font:400 13px/1.5 var(--mono);color:var(--ink-2);margin:12px 0 0}
.article-body h2{margin-top:1.7em}
.article-body h3{margin-top:1.4em}
.article-body figure{margin:1.8em 0}
.article-body dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 20px;margin:1.2em 0;border-top:1px solid var(--line);padding-top:12px}
.article-body dt{font:600 13px/1.6 var(--mono);color:var(--ink);overflow-wrap:anywhere}
.article-body dd{margin:0;color:var(--ink-2)}
.sources{border-top:1px solid var(--ink);margin-top:40px;padding-top:18px;font-size:15px}
.sources h2{font-size:1rem;font-family:var(--mono);letter-spacing:.04em}
.sources ol{padding-left:1.2em}
.sources li{margin-bottom:.5em;overflow-wrap:anywhere}

/* Places (atlas) */
.places{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;margin:1.4em 0}
.place-card{border:1px solid var(--line);background:var(--paper);padding:16px 18px}
.place-name{font-weight:700;margin:0 0 .3em}

/* Tool layout */
.tool{padding:24px 0 40px}
.tool > h1{border-bottom:1px solid var(--ink);padding-bottom:16px;margin-bottom:20px}
.tool > section{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:24px}
.tool > section:last-of-type{border-bottom:0}
.tool form fieldset{background:var(--white)}
.tool [role="group"]{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
#graph-input,#graph-compare{min-height:220px}
#graph-output,#graph-inspector{border:1px solid var(--line);background:var(--paper);padding:14px 16px;font:400 14px/1.6 var(--mono);color:var(--ink);overflow-wrap:anywhere}
#graph-output:empty::before,#graph-inspector:empty::before{content:"Nothing selected.";color:var(--ink-2)}
#graph-canvas{width:100%;height:auto;min-height:240px;background:var(--white);border:1px solid var(--line);display:block}
#graph-canvas .edge{stroke:var(--line);stroke-width:1.5;fill:none}
#graph-canvas .edge-label{font:400 12px var(--mono);fill:var(--ink-2)}
#graph-canvas .node circle{fill:var(--white);stroke:var(--ink);stroke-width:2}
#graph-canvas .node.selected circle{stroke:var(--uv);stroke-width:3;fill:#ece6fd}
#graph-canvas .node text{font:600 12px var(--mono);fill:var(--ink)}
#graph-export-note,#graph-sample-note,#graph-limits-note,#graph-fieldset-note{font:400 13px/1.55 var(--mono);color:var(--ink-2)}
@media (min-width:900px){
  .tool form fieldset{display:grid;grid-template-columns:1fr 1fr;gap:0 24px;align-items:start}
  .tool form fieldset > *{grid-column:1/-1}
  .tool form fieldset > #graph-input-wrap{grid-column:1}
  .tool > section{min-width:0}
}

@media (max-width:820px){
  .pair-grid{grid-template-columns:1fr;gap:22px}
  .step-list{grid-template-columns:1fr;border-top:1px solid var(--line)}
  .step-list li{border-right:0;border-bottom:1px solid var(--line);padding:16px 0}
  .step-list li+li{padding-left:0}
  .prose-pair{grid-template-columns:1fr;gap:24px;padding-top:30px}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .article-body dl{grid-template-columns:1fr;gap:2px}
  .article-body dt{margin-top:8px}
  body{font-size:16px}
}
@media (max-width:560px){
  .header-inner{flex-direction:column;align-items:flex-start;gap:8px}
  nav.site-nav ul{gap:2px 16px}
  .action-link{width:100%;justify-content:flex-start}
  h1{font-size:clamp(1.7rem,1.3rem + 3vw,2.2rem)}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}
@media print{
  body{background:#fff;color:#000;font-size:11.5pt}
  .site-header,.site-footer,.skip-link,.mast-action,.graph-figure,#graph-canvas,.tool [role="group"]{display:none!important}
  a{color:#000;text-decoration:underline}
  .article,.article-body,.prose-pair > div{max-width:none}
  h1,h2,h3{break-after:avoid}
}

.pair-doc,.pair-graph{min-width:0}.code-block{max-width:100%;overflow:auto}