:root{
  --ink:#080C11;
  --ground:#0A1017;
  --surface:#0F161E;
  --surface-2:#141D27;
  --line:#1C2732;
  --line-bright:#2B3A48;
  --chalk:#E8EEF3;
  --chalk-dim:#A7B6C2;
  --chalk-mute:#6C7E8D;

  --c-product:#EDA94C;
  --c-engineering:#5CCFBE;
  --c-ai:#AC9CF3;
  --c-founder:#F08063;
  --c-venture:#86AEE8;

  --serif:ui-serif,"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Text","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;

  --pad:clamp(20px,5vw,64px);
  --col:1160px;
}
/* Guides. Tokens above are lifted from index.html at build time by
   tools/build-guides.mjs, so the palette cannot drift out of sync. */

*{box-sizing:border-box;margin:0;padding:0}
:focus-visible{outline:2px solid var(--chalk);outline-offset:3px;border-radius:2px}

body.g-body{
  /* Reading palette, guides only. The site tokens are tuned for a dark graph
     with bright nodes; sustained reading needs the peak pulled off white and a
     second hue so 58 defined terms do not read as one grey wall. */
  --read-hi:#D3DDE6;   /* headings, bold, inline code   13.9:1 */
  --read:#ADBBC7;      /* body prose                     9.5:1 */
  --read-lo:#8494A2;   /* meta, markers, rails           6.1:1 */
  --read-term:#E6C48F;     /* the word being defined        11.5:1 */
  background:var(--ground);color:var(--read);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--col);margin-inline:auto;padding-inline:var(--pad)}
a{color:inherit}

.skip{position:absolute;left:-9999px;top:0;z-index:10;background:var(--chalk);color:var(--ink);
  padding:10px 16px;font-family:var(--mono);font-size:12px;text-decoration:none}
.skip:focus{left:0}

/* ---------- nav: same shape as the homepage ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(8,12,17,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:24px;height:58px}
.nav-name{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;
  display:flex;align-items:center;gap:9px}
.nav-name a{color:inherit;text-decoration:none;display:flex;align-items:center;gap:9px}
.nav-logo{height:19px;width:auto;flex:none;display:block}
.nav-name b{font-weight:600}
.nav-name span{color:var(--chalk-mute)}
.nav-links{display:flex;gap:22px;font-family:var(--mono);font-size:12px;letter-spacing:.04em}
.nav-links a{color:var(--chalk-mute);text-decoration:none;transition:color .18s}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--chalk)}
.nav-links a.nav-cta{color:var(--chalk)}
/* the links wrap on a phone rather than vanishing: every page needs a way out */
@media(max-width:760px){.nav-links{gap:14px;font-size:11px}.nav-name span{display:none}}
@media(max-width:620px){
  .nav-in{flex-wrap:wrap;height:auto;gap:9px;padding-block:11px}
  .nav-links{width:100%;justify-content:flex-start;flex-wrap:wrap;gap:8px 15px}
}

/* ---------- footer: identical to the homepage ---------- */
footer{border-top:1px solid var(--line);padding:26px 0 42px}
.foot{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  font-family:var(--mono);font-size:11.5px;color:var(--chalk-mute)}
.foot a{color:var(--chalk-mute);text-decoration:none}
.foot a:hover{color:var(--chalk)}

.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--chalk-mute)}
.eyebrow a{color:inherit;text-decoration:none}
.eyebrow a:hover{color:var(--read-hi)}
.lede{font-size:17px;line-height:1.55;color:var(--read)}

/* ---------- index ---------- */
.g-wrap{padding-block:clamp(40px,7vw,76px) clamp(56px,9vw,104px)}
.g-wrap-index{max-width:820px}
.g-index-head{display:flex;flex-direction:column;gap:14px;margin-bottom:44px}
.g-h1{font-family:var(--serif);color:var(--read-hi);font-weight:500;letter-spacing:-.02em;
  line-height:1.1;font-size:clamp(2rem,4.6vw,3rem)}

/* ---------- article shell ---------- */
/* The prose column is the point: rails only appear once they can sit beside
   72ch rather than eat into it, and the guide wrap runs wider than the rest of
   the site to pay for them. */
.g-wrap:not(.g-wrap-index){display:grid;gap:clamp(24px,3vw,44px);align-items:start;
  grid-template-columns:minmax(0,1fr)}
@media(min-width:1080px){
  .g-wrap:not(.g-wrap-index){grid-template-columns:minmax(0,1fr) 232px}
  .g-side{grid-column:1 / -1}
}
@media(min-width:1320px){
  .g-wrap:not(.g-wrap-index){max-width:1420px;grid-template-columns:186px minmax(0,1fr) 220px}
  .g-side{grid-column:1}
}

/* ---------- the guide rail: present at every width, never collapsed ---------- */
.g-side{font-family:var(--mono);font-size:12px;line-height:1.45}
.g-side ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.g-side a{display:block;color:var(--read-lo);text-decoration:none;border:1px solid var(--line);
  border-radius:6px;padding:8px 11px;transition:color .18s,border-color .18s,background .18s}
.g-side a:hover{color:var(--read-hi);border-color:var(--line-bright)}
.g-side a[aria-current="page"]{color:var(--read-hi);border-color:var(--line-bright);background:var(--surface)}
@media(min-width:1320px){
  .g-side{position:sticky;top:78px}
  .g-side ol{flex-direction:column;flex-wrap:nowrap;gap:2px}
  .g-side a{border:0;border-left:2px solid var(--line);border-radius:0;padding:9px 0 9px 14px;background:none}
  .g-side a:hover{border-left-color:var(--line-bright)}
  .g-side a[aria-current="page"]{border-left-color:var(--read-hi);background:none}
}

/* the toolkit is the same rail item in a different key: it leaves the site, so
   it reads in the one palette colour the guides do not otherwise use */
.g-side .g-side-x{color:var(--c-ai);border-color:rgba(172,156,243,.32);margin-top:12px}
.g-side .g-side-x:hover{color:var(--c-ai);border-color:var(--c-ai)}
.g-side-d{display:block;margin-top:6px;font-size:11px;line-height:1.45;color:var(--read-lo)}
.g-side-k{display:block;margin-top:8px;font-size:9.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--c-ai);opacity:.85}
@media(min-width:1320px){
  .g-side .g-side-x{margin-top:16px;padding-top:12px}
  .g-side .g-side-x:hover{border-left-color:var(--c-ai)}
}
.g-article{min-width:0;max-width:72ch}
.g-head{display:flex;flex-direction:column;gap:13px;padding-bottom:26px;margin-bottom:34px;
  border-bottom:1px solid var(--line)}
.g-meta{font-family:var(--mono);font-size:11.5px;color:var(--read-lo);letter-spacing:.02em}

/* ---------- prose ---------- */
.g-prose{font-size:18px;line-height:1.75;color:var(--read);font-family:var(--serif)}
.g-prose>*+*{margin-top:26px}
.g-prose p{max-width:72ch}
.g-prose strong{color:var(--read-hi);font-weight:600}
/* the defined term carries the hue; brightness alone cannot hold a glossary apart */
.g-term strong{color:var(--read-term)}
.g-prose em{font-style:italic}
.g-prose code{font-family:var(--mono);font-size:.86em;color:var(--read-hi);
  background:var(--surface-2);border:1px solid var(--line);border-radius:4px;padding:1px 5px}
.g-h2{font-family:var(--serif);color:var(--read-hi);font-weight:500;letter-spacing:-.015em;
  font-size:1.7rem;line-height:1.22;margin-top:64px;scroll-margin-top:84px}
.g-prose>.g-h2:first-child{margin-top:0}
.g-term{scroll-margin-top:84px}
.g-rule{border:0;border-top:1px solid var(--line);margin-block:38px}
.g-list{padding-left:22px;max-width:70ch}
.g-list li+li{margin-top:9px}
.g-list li::marker{color:var(--read-lo)}

/* anchors: quiet until you want them */
.g-anchor{margin-left:.4em;color:var(--read-lo);text-decoration:none;font-family:var(--mono);
  font-size:.62em;opacity:0;vertical-align:middle}
.g-h2:hover .g-anchor,.g-term:hover .g-anchor,.g-anchor:focus-visible{opacity:1}
.g-anchor:hover{color:var(--read-hi)}
@media(hover:none){.g-anchor{opacity:.45}}

/* ---------- examples ---------- */
.g-ex{display:flex;flex-direction:column;gap:7px}
.g-ex+.g-ex{margin-top:16px}
.g-ex-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;
  color:var(--read-lo)}
.g-ex blockquote{border-left:2px solid var(--line-bright);padding:3px 0 3px 17px;
  font-size:16.5px;line-height:1.6;color:var(--read);font-family:var(--sans)}
.g-ex-vague,.g-ex-better{border:1px solid;border-radius:9px;padding:14px 16px}
.g-ex-vague{background:rgba(240,128,99,.07);border-color:rgba(240,128,99,.26)}
.g-ex-better{background:rgba(92,207,190,.07);border-color:rgba(92,207,190,.26)}
.g-ex-vague .g-ex-label{color:var(--c-founder)}
.g-ex-better .g-ex-label{color:var(--c-engineering)}
.g-ex-vague blockquote{border-left-color:rgba(240,128,99,.5)}
.g-ex-better blockquote{border-left-color:rgba(92,207,190,.5)}
.g-ex-vague blockquote,.g-ex-better blockquote{color:var(--read-hi)}
.g-ex-vague+.g-ex-better{margin-top:10px}
.g-pre{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px 20px;
  overflow-x:auto}
.g-pre code{font-family:var(--mono);font-size:13.5px;line-height:1.65;color:var(--read);
  background:none;border:0;padding:0;white-space:pre}
@media(max-width:640px){.g-pre code{white-space:pre-wrap;word-break:break-word}}

/* ---------- table ---------- */
.g-tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px}
.g-table{border-collapse:collapse;width:100%;min-width:640px;font-family:var(--sans);font-size:14.5px}
.g-table th,.g-table td{text-align:left;vertical-align:top;padding:12px 15px;
  border-bottom:1px solid var(--line);line-height:1.5}
.g-table thead th{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--chalk-mute);white-space:nowrap}
.g-table tbody tr:last-child td{border-bottom:0}
.g-table td:first-child{color:var(--read-hi);white-space:nowrap}

/* ---------- callout, prev/next ---------- */
.g-callout{border:1px solid var(--line);border-radius:8px;background:var(--surface);
  padding:20px 22px;font-size:16px;line-height:1.6;font-family:var(--sans);margin-top:40px}
.g-callout a{color:var(--read-hi)}
.g-pn{display:flex;justify-content:space-between;gap:20px;margin-top:56px;padding-top:26px;
  border-top:1px solid var(--line)}
.g-pn-a{display:flex;flex-direction:column;gap:5px;text-decoration:none;font-family:var(--serif);
  font-size:1.05rem;color:var(--read);max-width:22ch}
.g-pn-next{text-align:right;margin-left:auto}
.g-pn-a span{font-family:var(--mono);font-size:10px;letter-spacing:.15em;text-transform:uppercase;
  color:var(--chalk-mute)}
.g-pn-a:hover{color:var(--read-hi)}

/* ---------- table of contents ---------- */
.g-toc{display:none}
@media(min-width:1080px){
  .g-toc{display:block;position:sticky;top:78px;font-family:var(--mono);font-size:11.5px;
    line-height:1.5;max-height:calc(100vh - 110px);overflow-y:auto}
  .g-toc ol{list-style:none;display:flex;flex-direction:column;gap:11px;
    border-left:1px solid var(--line);padding-left:15px}
  .g-toc a{color:var(--read-lo);text-decoration:none;display:block}
  .g-toc a:hover{color:var(--read-hi)}
  .g-toc-h{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--chalk-mute);
    margin-bottom:13px}
}
.g-toc-m{border:1px solid var(--line);border-radius:8px;margin-bottom:34px;
  font-family:var(--mono);font-size:12.5px}
.g-toc-m summary{padding:13px 16px;cursor:pointer;color:var(--read);letter-spacing:.04em}
.g-toc-m ol{list-style:none;padding:0 16px 15px 16px;display:flex;flex-direction:column;gap:10px}
.g-toc-m a{color:var(--read-lo);text-decoration:none}
.g-toc-m a:hover{color:var(--read-hi)}
@media(min-width:1080px){.g-toc-m{display:none}}

@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}