/* The home page's language: amber is you, blue is other people and businesses,
   violet is a software vendor's agent, slate is government, mint is delivered.
   Every pair also differs in shape, never in colour alone. */
:root{
  --bg:#F3F4F0; --surface:#FBFBF8; --surface-2:#E9ECE6; --line:#D4DAD3; --line-strong:#B7C1B9;
  --fg:#0D1B1E; --muted:#475556; --faint:#5A6868;
  --amber:#F2A93B; --amber-line:#E08E17; --amber-ink:#8A4F00; --amber-soft:rgba(242,169,59,.30); --amber-wash:#FBF0DC;
  --mint:#43D6A6; --mint-ink:#0A6B4E;
  --blue:#3563D9; --violet:#6B45D4; --slate:#5E6E78;
  --dot:rgba(13,27,30,.13); --shadow-c:rgba(13,27,30,.30);
  --shadow:0 1px 0 rgba(13,27,30,.03),0 14px 34px -22px rgba(13,27,30,.34);
  --st-yours:#F2A93B; --st-theirs:#8AA5FF; --st-vendor:#B9A0FF; --st-gov:#9AABB5; --st-ok:#43D6A6;
  --display:'Bricolage Grotesque','Avenir Next','Helvetica Neue',Arial,sans-serif;
  --body:'Instrument Sans',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'Martian Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0A1518; --surface:#0F1F23; --surface-2:#13262A; --line:#1E3337; --line-strong:#2E474C;
    --fg:#E6EEEA; --muted:#A3B3AF; --faint:#879A96;
    --amber-line:#F2A93B; --amber-ink:#F6BA60; --amber-soft:rgba(242,169,59,.24); --amber-wash:#1C2620;
    --mint-ink:#62E2B9; --blue:#8AA6FF; --violet:#BBA4FF; --slate:#A9B8C0;
    --dot:rgba(230,238,234,.08); --shadow-c:rgba(0,0,0,.7);
    --shadow:0 1px 0 rgba(0,0,0,.25),0 18px 40px -22px rgba(0,0,0,.7);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0A1518; --surface:#0F1F23; --surface-2:#13262A; --line:#1E3337; --line-strong:#2E474C;
  --fg:#E6EEEA; --muted:#A3B3AF; --faint:#879A96;
  --amber-line:#F2A93B; --amber-ink:#F6BA60; --amber-soft:rgba(242,169,59,.24); --amber-wash:#1C2620;
  --mint-ink:#62E2B9; --blue:#8AA6FF; --violet:#BBA4FF; --slate:#A9B8C0;
  --dot:rgba(230,238,234,.08); --shadow-c:rgba(0,0,0,.7);
  --shadow:0 1px 0 rgba(0,0,0,.25),0 18px 40px -22px rgba(0,0,0,.7);
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
:focus-visible{outline:2px solid var(--amber-ink);outline-offset:3px;border-radius:6px}
h1,h2,h3{font-family:var(--display);font-weight:600;margin:0;text-wrap:balance}
p{margin:0}
.wrap{max-width:1200px;margin-inline:auto;padding-inline:40px}
.kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-stretch:87.5%;font-size:.7rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--amber-ink)}
.kicker::before{content:"";width:8px;height:8px;border-radius:2.5px;background:var(--amber)}
.ico{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* top bar */
.topbar{border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-size:1.1rem;font-weight:500}
.brand b{font-weight:700}
.mark{flex:none;overflow:visible}
.mark .o{fill:none;stroke:currentColor;stroke-width:2;opacity:.35}
.mark .a{fill:var(--amber)} .mark .m{fill:var(--mint)}
.mark .a,.mark .m{transition:transform .6s cubic-bezier(.55,-.35,.3,1.35)}
.brand:hover .mark .a{transform:translate(-14px,14px)}
.brand:hover .mark .m{transform:translate(14px,-14px)}
.bar .back{font-size:.92rem;color:var(--muted);text-decoration:none}
.bar .back:hover{color:var(--fg)}

/* hero */
.hero{position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(var(--dot) 1.2px,transparent 1.4px);background-size:24px 24px;-webkit-mask-image:radial-gradient(70% 70% at 70% 30%,black,transparent 75%);mask-image:radial-gradient(70% 70% at 70% 30%,black,transparent 75%)}
.hero-in{position:relative;padding-block:48px 72px}
.hero-copy{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:24px 56px;align-items:end;margin-bottom:32px}
.hero-copy > *{animation:rise .75s cubic-bezier(.2,.7,.2,1) both}
.hero-copy > :nth-child(2){animation-delay:.06s}
.hero-copy > :nth-child(3){animation-delay:.12s}
.hero h1{grid-column:1;font-size:clamp(2.4rem,1.3rem + 3.1vw,3.9rem);line-height:.98;letter-spacing:-.04em;font-stretch:88%;margin-top:18px}
.hero h1 em{font-style:normal;color:var(--amber-ink);background-image:linear-gradient(var(--amber-soft),var(--amber-soft));background-repeat:no-repeat;background-position:0 88%;background-size:100% .3em}
.hero .lede{grid-column:2;font-size:1.08rem;line-height:1.6;color:var(--muted);max-width:52ch}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* the screen */
.screen{margin:0;position:relative;background:var(--surface);border-radius:24px;overflow:hidden;box-shadow:0 0 0 1px var(--line),var(--shadow);animation:rise .9s .15s cubic-bezier(.2,.7,.2,1) both}
.screen-top{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:10px 18px;padding:18px 22px 6px}
.chap{display:flex;gap:14px;align-items:baseline;min-width:0;flex:1 1 320px;min-height:4.6rem}
.chap-n{font-family:var(--mono);font-stretch:87.5%;font-size:.72rem;font-weight:500;color:var(--amber-ink);white-space:nowrap}
.chap-n small{font-size:inherit;color:var(--muted)}
.chap-h{font-family:var(--display);font-size:1.3rem;font-weight:600;letter-spacing:-.015em;line-height:1.2}
.chap-d{font-size:.95rem;line-height:1.45;color:var(--muted);margin-top:3px;max-width:70ch}
.chap.in .chap-h,.chap.in .chap-d{animation:capin .55s cubic-bezier(.2,.7,.2,1) both}
.chap.in .chap-d{animation-delay:.07s}
@keyframes capin{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.legend{display:flex;gap:14px;flex-wrap:wrap;padding-top:6px;font-family:var(--mono);font-stretch:87.5%;font-size:.62rem;font-weight:500;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.legend i{width:11px;height:11px;border-radius:50%;border:2px solid var(--st-yours);display:inline-block}
.legend .k-biz{border-style:dashed;border-color:var(--st-theirs)}
.legend .k-ven{width:14px;height:9px;border-radius:3px;border-width:1.5px;border-color:var(--st-vendor)}
.legend .k-gov{border-radius:2px;border-color:var(--st-gov);background:linear-gradient(90deg,transparent 30%,var(--st-gov) 30% 40%,transparent 40% 60%,var(--st-gov) 60% 70%,transparent 70%)}
.stage-box{position:relative;width:100%;aspect-ratio:1600/720;background-image:radial-gradient(var(--dot) 1px,transparent 1.3px);background-size:22px 22px;background-position:11px 11px}
.stage-box svg{position:absolute;inset:0;width:100%;height:100%;display:block}
.stage text{font-family:var(--display);font-weight:700;letter-spacing:-.01em}
.screen-foot{display:flex;align-items:center;gap:14px;padding:10px 14px 12px 22px;border-top:1px solid var(--line)}
.chapters{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:8px;flex:1;min-width:0}
.chapters button{appearance:none;background:none;border:0;padding:8px 0 3px;margin:0;cursor:pointer;display:flex;flex-direction:column;gap:7px;min-width:0;text-align:left;color:var(--muted);font-family:var(--mono);font-stretch:87.5%;font-size:.62rem;font-weight:500;letter-spacing:.06em;text-transform:uppercase;transition:color .3s}
.chapters button:hover,.chapters button.cur{color:var(--fg)}
.chapters .track{position:relative;display:block;height:3px;border-radius:2px;background:var(--line);overflow:hidden}
.chapters .fill{position:absolute;inset:0;background:var(--muted);transform-origin:0 50%;transform:scaleX(0)}
.chapters button.cur .fill{background:var(--amber)}
.chapters .lab{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.play{flex:none;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);color:var(--fg);display:grid;place-items:center;cursor:pointer}
.play svg{width:14px;height:14px;fill:currentColor}
.play .i-play{display:none}
.play.paused .i-play{display:block}
.play.paused .i-pause{display:none}

/* the four kinds */
.jump{list-style:none;margin:28px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.jump a{display:flex;gap:12px;align-items:center;height:100%;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:var(--surface);text-decoration:none;font-family:var(--display);font-weight:600;font-size:1rem;line-height:1.25;transition:transform .25s cubic-bezier(.2,.7,.2,1),border-color .2s,box-shadow .25s}
.jump a:hover,.jump a:focus-visible{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.jump .dotn{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:11px;font-family:var(--mono);font-stretch:87.5%;font-size:.75rem;font-weight:600;color:var(--amber-ink);background:var(--amber-wash);border:1px solid var(--amber-soft)}

.kind{padding:88px 0;border-top:1px solid var(--line);scroll-margin-top:8px}
.kind:nth-of-type(even){background:linear-gradient(180deg,var(--surface) 0,transparent 70%)}
.kind-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:48px;align-items:center}
.kind:nth-of-type(even) .kind-grid > .vig{order:-1}
.kind h2{font-size:clamp(1.8rem,1.2rem + 1.6vw,2.6rem);line-height:1.04;letter-spacing:-.03em;font-stretch:90%;margin:14px 0 14px}
.who{font-size:1.06rem;color:var(--muted);max-width:56ch}
.vig{margin:0;border-radius:20px;overflow:hidden;background:var(--surface);box-shadow:0 0 0 1px var(--line),var(--shadow)}
.vig .stage-box{aspect-ratio:16/10}
.vig figcaption{padding:12px 16px 14px;border-top:1px solid var(--line);font-family:var(--mono);font-stretch:87.5%;font-size:.66rem;letter-spacing:.04em;color:var(--muted)}
.stories{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:40px}
.story{position:relative;padding:22px 22px 22px;background:var(--surface);border:1px solid var(--line);border-radius:18px 18px 18px 6px;box-shadow:var(--shadow)}
.story .si{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--amber-wash);color:var(--amber-ink);border:1px solid var(--amber-soft);margin-bottom:12px}
.story h3{font-size:1.14rem;letter-spacing:-.01em;margin-bottom:6px}
.story p{color:var(--muted)}
.panels{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:16px}
.panel{padding:22px;border-radius:18px;border:1px solid var(--line)}
.panel.adds{background:var(--amber-wash);border-color:var(--amber-soft)}
.panel h3{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-stretch:87.5%;font-size:.7rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.panel.adds h3{color:var(--amber-ink)}
.panel h3 .ico{width:18px;height:18px}
.panel ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.panel li{position:relative;padding-left:26px}
.panel li::before{content:"";position:absolute;left:2px;top:.55em;width:10px;height:10px;border-radius:50%;border:2px solid var(--line-strong)}
.panel.adds li::before{border-radius:3px;border-color:var(--amber-line);background:var(--amber-soft)}
.more{display:flex;gap:10px;align-items:flex-start;margin-top:18px;font-size:.95rem;color:var(--muted)}
.more .ico{width:18px;height:18px;margin-top:3px;color:var(--amber-ink)}

.close{padding:96px 0 104px;border-top:1px solid var(--line)}
.close h2{font-size:clamp(1.8rem,1.2rem + 1.6vw,2.6rem);line-height:1.04;letter-spacing:-.03em;font-stretch:90%;margin:14px 0 14px}
.close > .wrap > p{color:var(--muted);max-width:62ch;font-size:1.06rem}
.gets{list-style:none;margin:36px 0 28px;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.gets li{display:flex;flex-direction:column;gap:14px;padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);font-size:.95rem;line-height:1.5}
.gets .tile{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--amber-wash);color:var(--amber-ink);border:1px solid var(--amber-soft)}
.close .after{color:var(--muted)}
.close .after a{color:var(--fg);text-decoration-color:var(--amber-line);text-decoration-thickness:1.5px;text-underline-offset:3px}
footer{border-top:1px solid var(--line);padding:24px 0 44px;font-size:.88rem;color:var(--muted)}
.more a{color:var(--fg);text-decoration-color:var(--amber-line);text-decoration-thickness:1.5px;text-underline-offset:3px}

@media (max-width:1000px){
  .hero-copy{grid-template-columns:minmax(0,1fr)}
  .hero .lede{grid-column:1}
  .kind-grid{grid-template-columns:minmax(0,1fr)}
  .kind:nth-of-type(even) .kind-grid > .vig{order:0}
  .gets{grid-template-columns:repeat(2,minmax(0,1fr))}
  .jump{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .wrap{padding-inline:16px}
  .hero-in{padding-block:32px 56px}
  .stories,.panels{grid-template-columns:minmax(0,1fr)}
  .kind{padding:64px 0}
  .screen-top{padding:14px 14px 4px}
  .screen-foot{padding:8px 10px 10px 14px}
  .chap{min-height:6.4rem}
  .gets{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.hero-copy > *,.screen{animation:none}}

/* ── worked-example pages ── */
.crumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-family:var(--mono);font-stretch:87.5%;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--fg)}
.crumbs span[aria-hidden]{opacity:.5}
.sub-hero{position:relative;overflow:hidden}
.sub-hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(var(--dot) 1.2px,transparent 1.4px);background-size:24px 24px;-webkit-mask-image:radial-gradient(60% 80% at 80% 20%,black,transparent 75%);mask-image:radial-gradient(60% 80% at 80% 20%,black,transparent 75%)}
.sub-hero .wrap{position:relative;padding-block:36px 56px}
.sub-hero h1{font-size:clamp(2.2rem,1.3rem + 2.6vw,3.4rem);line-height:1;letter-spacing:-.035em;font-stretch:88%;margin:22px 0 18px;max-width:20ch}
.sub-hero .lede{font-size:1.08rem;color:var(--muted);max-width:66ch}
.examples-nav{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.examples-nav a{display:inline-flex;align-items:center;gap:10px;padding:10px 16px 10px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);text-decoration:none;font-family:var(--display);font-weight:600;transition:border-color .2s,transform .25s cubic-bezier(.2,.7,.2,1)}
.examples-nav a:hover{border-color:var(--line-strong);transform:translateY(-1px)}
.examples-nav .si{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--amber-wash);color:var(--amber-ink);border:1px solid var(--amber-soft)}
.examples-nav .si .ico{width:17px;height:17px}

.example{padding:72px 0 88px;border-top:1px solid var(--line);scroll-margin-top:8px}
.example-head{display:flex;gap:18px;align-items:flex-start;margin-bottom:30px}
.example-head .si{flex:none;display:inline-grid;place-items:center;width:52px;height:52px;border-radius:15px;background:var(--amber-wash);color:var(--amber-ink);border:1px solid var(--amber-soft)}
.example-head .si .ico{width:28px;height:28px}
.example h2{font-size:clamp(1.7rem,1.2rem + 1.4vw,2.4rem);line-height:1.05;letter-spacing:-.03em;font-stretch:90%;margin:6px 0 10px}
.example-head p{color:var(--muted);max-width:70ch}
.ex-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:28px;align-items:start}
.ex-grid .screen{position:sticky;top:16px;animation:none}
.ex-grid .stage-box{aspect-ratio:16/9}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:step}
.steps > li{position:relative;padding:18px 20px 18px 62px;border:1px solid var(--line);border-radius:18px;background:var(--surface);cursor:pointer;transition:border-color .25s,box-shadow .25s,background-color .25s}
.steps > li::before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;left:18px;top:18px;display:grid;place-items:center;width:30px;height:30px;border-radius:9px;font-family:var(--mono);font-stretch:87.5%;font-size:.7rem;font-weight:600;color:var(--muted);border:1px solid var(--line)}
.steps > li:hover{border-color:var(--line-strong)}
.steps > li.now{border-color:var(--amber-line);box-shadow:0 0 0 3px var(--amber-soft),var(--shadow)}
.steps > li.now::before{color:var(--on-amber,#1A1206);background:var(--amber);border-color:var(--amber-line)}
.steps > li.done::before{color:var(--mint-ink);border-color:var(--mint)}
.steps h3{font-size:1.06rem;letter-spacing:-.01em;margin-bottom:8px}
.steps dl{margin:0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px 12px;font-size:.95rem;line-height:1.5}
.steps dt{font-family:var(--mono);font-stretch:87.5%;font-size:.62rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;padding-top:.35em;white-space:nowrap}
.steps dt.a{color:var(--muted)}
.steps dt.m{color:var(--amber-ink)}
.steps dt.s{color:var(--faint)}
.steps dd{margin:0;color:var(--muted)}
.next{padding:72px 0 96px;border-top:1px solid var(--line)}
.next-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px}
.next a{display:flex;flex-direction:column;gap:6px;padding:22px;border:1px solid var(--line);border-radius:18px;background:var(--surface);text-decoration:none;transition:border-color .2s,transform .25s cubic-bezier(.2,.7,.2,1),box-shadow .25s}
.next a:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--shadow)}
.next small{font-family:var(--mono);font-stretch:87.5%;font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--amber-ink)}
.next strong{font-family:var(--display);font-size:1.25rem;letter-spacing:-.015em}
.next span{color:var(--muted);font-size:.95rem}
.deep{display:inline-flex;align-items:center;gap:8px;margin-top:22px;font-family:var(--display);font-weight:600;text-decoration:none;padding:12px 18px;border-radius:12px;background:var(--fg);color:var(--bg);transition:transform .25s cubic-bezier(.2,.7,.2,1)}
.deep:hover{transform:translateY(-1px)}
@media (max-width:1000px){
  .ex-grid{grid-template-columns:minmax(0,1fr)}
  .ex-grid .screen{position:relative;top:0;order:-1}
  .next-grid{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  .steps > li{padding:16px 16px 16px 56px}
  .steps > li::before{left:14px}
  .steps dl{grid-template-columns:minmax(0,1fr)}
  .steps dt{padding-top:0}
}

/* a row of capability cards, three across */
.caps{padding:64px 0 24px}
.caps h2{font-size:clamp(1.6rem,1.2rem + 1.2vw,2.2rem);line-height:1.08;letter-spacing:-.025em;font-stretch:90%;margin:12px 0 0;max-width:30ch}
.gets.three{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:26px}
.gets li strong{display:block;font-family:var(--display);font-size:1.06rem;letter-spacing:-.01em;margin-bottom:-6px}
@media (max-width:1000px){.gets.three{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:760px){.gets.three{grid-template-columns:minmax(0,1fr)}}