:root{
  --bg:#F5F3ED; --ink:#252722; --muted:#5F5E55;
  --rust:#A8482B; --rust-fill:#B85435; --rust-light:#E3966F;
  --sand:#E9E4D6; --line:#CFC8B6; --sage:#5E6849;
  --dark-line:#4A4C44; --dark-muted:#BDBAAC;
  --serif:"Iowan Old Style","Palatino Linotype","Book Antiqua",Palatino,Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --max:72rem; --gut:clamp(1.25rem,4vw,3rem);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:1.0625rem;line-height:1.6}
img,svg{max-width:100%}
a{color:var(--rust);text-underline-offset:.2em}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--rust);outline-offset:3px}
.dark :focus-visible{outline-color:var(--rust-light)}
code,pre,.mono{font-family:var(--mono)}
code{font-size:.9em;overflow-wrap:anywhere}
h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-.015em;margin:0}
p{margin:0 0 1em;max-width:62ch}
section[id]{scroll-margin-top:1rem}
.wrap{max-width:var(--max);margin-inline:auto;padding-inline:var(--gut)}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:.6rem 1rem;z-index:10}
.skip:focus{left:0}

/* header */
.site-header{border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.5rem 2rem;padding-block:1.1rem}
.wordmark{font-family:var(--serif);font-size:1.4rem;font-weight:600;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.site-nav{display:flex;flex-wrap:wrap;gap:.4rem 1.6rem;font-size:.95rem}
.site-nav a{color:var(--ink);text-decoration:none;padding-block:.2rem}
.site-nav a:hover{text-decoration:underline;text-decoration-color:var(--rust);text-underline-offset:.3em}
.site-nav a.repo{border-bottom:2px solid var(--rust-fill);font-weight:600}

/* hero */
.hero{padding-block:clamp(3rem,8vw,6.5rem) clamp(3rem,6vw,5rem)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:3rem}
@media (min-width:60rem){.hero .wrap{grid-template-columns:7fr 5fr;gap:4.5rem;align-items:end}}
.hero h1{font-size:clamp(2.35rem,5.3vw,4.3rem);line-height:1.05;letter-spacing:-.025em;max-width:15ch;margin-bottom:1.75rem}
.lede{font-size:1.15rem;max-width:36rem;margin-bottom:2rem}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.75rem;margin-bottom:1.5rem}
.btn{display:inline-block;background:var(--rust);color:var(--bg);padding:.8rem 1.3rem;border-radius:2px;font-weight:600;text-decoration:none}
.btn:hover{background:var(--ink);color:var(--bg)}
.textlink{color:var(--ink);font-weight:600;text-decoration-color:var(--rust-fill);text-decoration-thickness:2px}
.hero-note{font-size:.95rem;color:var(--muted);margin:0}
.contract{border:1px solid var(--ink);background:var(--sand)}
.contract-head{display:flex;justify-content:space-between;gap:1rem;padding:.6rem .9rem;border-bottom:1px solid var(--ink);font-size:.9rem;font-weight:600}
.contract-head span:last-child{font-weight:400;color:var(--muted)}
.contract pre{margin:0;padding:1rem .9rem;overflow-x:auto;font-size:.84rem;line-height:1.7}
.contract .k{color:var(--rust)}
.contract-cap{padding:.7rem .9rem;border-top:1px solid var(--line);font-size:.88rem;color:var(--muted);margin:0;max-width:none}
.states{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);margin:0;padding:0;list-style:none;font-family:var(--mono);font-size:.72rem}
.states li{padding:.55rem .5rem;border-left:1px solid var(--line);overflow-wrap:anywhere}
.states li:first-child{border-left:0}
.states-label{padding:.55rem .9rem 0;margin:0;font-size:.88rem;color:var(--muted);max-width:none}

/* pipeline */
.dark{background:var(--ink);color:var(--bg)}
.dark a{color:var(--rust-light)}
.dark a:hover{color:var(--bg)}
.pipeline{padding-block:clamp(3.5rem,8vw,6rem)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr);gap:1rem 4rem;margin-bottom:3rem}
@media (min-width:60rem){.sec-head{grid-template-columns:5fr 6fr;align-items:end}}
.sec-head h2{font-size:clamp(1.9rem,3.6vw,2.8rem);line-height:1.1}
.sec-head p{margin:0;color:var(--dark-muted)}
.overview{display:none;margin-bottom:3.5rem}
@media (min-width:48rem){.overview{display:block}}
.overview svg{display:block;width:100%;height:auto;color:var(--bg)}
.overview .box{fill:none;stroke:var(--dark-muted);stroke-width:1}
.overview .box.last{stroke:var(--rust-light);stroke-width:1.5}
.overview .name{fill:var(--bg);font:500 15px var(--serif)}
.overview .tech{fill:var(--dark-muted);font:12px var(--sans)}
.overview .arrow{stroke:var(--rust-light);stroke-width:1.5;fill:none}
.rail{list-style:none;margin:0;padding:0}
.rail>li{position:relative;display:grid;grid-template-columns:2.5rem minmax(0,1fr);column-gap:1.25rem;padding-bottom:2.4rem}
.rail>li:last-child{padding-bottom:0}
.rail>li:not(:last-child)::before{content:"";position:absolute;left:1.25rem;top:2.7rem;bottom:.3rem;width:1px;background:var(--dark-line)}
.rail>li:not(:last-child)::after{content:"";position:absolute;left:calc(1.25rem - 5px);bottom:0;border:5px solid transparent;border-top:7px solid var(--rust-light);border-bottom:0}
.rail-n{grid-row:1/3;display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;border:1px solid var(--rust-light);color:var(--rust-light);font-family:var(--mono);font-size:.95rem}
.rail h3{font-size:1.45rem;margin:.1rem 0 .5rem}
.rail p{color:var(--dark-muted);margin-bottom:.6rem}
.rail p code{color:var(--bg)}
.rail .tech{margin:0;font-size:.92rem;color:var(--bg);max-width:none}
.rail .tech span{color:var(--dark-muted)}
@media (min-width:60rem){
  .rail>li{grid-template-columns:2.5rem minmax(0,1fr) 19rem;column-gap:2rem}
  .rail-n{grid-row:1/2}
  .rail .tech{grid-column:3;grid-row:1/2;border-left:1px solid var(--dark-line);padding-left:1.25rem;align-self:start;margin-top:.45rem}
  .rail .body{grid-column:2}
}
.sync{margin-top:3.5rem;border:1px dashed var(--dark-muted);padding:1.5rem}
.sync h3{font-size:1.35rem;margin-bottom:.6rem}
.sync p{color:var(--dark-muted);margin-bottom:.5rem}
.sync p code{color:var(--bg)}
.stores{margin:3.5rem 0 0;display:grid;gap:0;grid-template-columns:1fr;border-top:1px solid var(--dark-line)}
@media (min-width:40rem){.stores{grid-template-columns:repeat(2,1fr)}}
@media (min-width:64rem){.stores{grid-template-columns:repeat(4,1fr)}}
.stores div{padding:1.1rem 1.25rem 1.1rem 0;border-bottom:1px solid var(--dark-line)}
@media (min-width:64rem){.stores div{border-bottom:0;padding-right:1.5rem}.stores div+div{padding-left:1.5rem;border-left:1px solid var(--dark-line)}}
.stores dt{font-family:var(--serif);font-size:1.2rem;margin-bottom:.3rem}
.stores dd{margin:0;color:var(--dark-muted);font-size:.95rem}

/* features */
.features{padding-block:clamp(4rem,9vw,7rem)}
.features .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:2.5rem}
@media (min-width:60rem){.features .wrap{grid-template-columns:4fr 8fr;gap:5rem}.features .intro{position:sticky;top:2rem;align-self:start}}
.features h2{font-size:clamp(1.9rem,3.6vw,2.8rem);line-height:1.1;margin-bottom:1rem}
.features .intro p{color:var(--muted)}
.feat{border-top:1px solid var(--ink);padding-block:1.6rem 2rem}
.feat h3{font-size:1.5rem;margin-bottom:.7rem}
.feat p{margin-bottom:.7rem}
.feat p.why{color:var(--muted);margin-bottom:0}
.feat.major h3{font-size:clamp(1.8rem,3vw,2.3rem)}
.feat.major{border-top-width:3px;border-top-color:var(--rust-fill)}

/* engineering */
.eng{background:var(--sand);padding-block:clamp(3.5rem,8vw,6rem)}
.eng h2{font-size:clamp(1.9rem,3.6vw,2.8rem);line-height:1.1;margin-bottom:2.5rem;max-width:20ch}
.eng-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:3rem}
@media (min-width:60rem){.eng-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:4.5rem}}
.eng h3{font-size:1.35rem;margin-bottom:1rem}
.stack{margin:0}
.stack div{display:grid;grid-template-columns:minmax(7rem,9.5rem) 1fr;gap:1rem;padding-block:.6rem;border-top:1px solid var(--line)}
.stack dt{font-weight:600}
.stack dd{margin:0;color:var(--muted);font-size:.97rem}
.files{list-style:none;margin:0;padding:0}
.files li{padding-block:.7rem;border-top:1px solid var(--line)}
.files a{font-family:var(--mono);font-size:.88rem;font-weight:600;overflow-wrap:anywhere}
.files span{display:block;color:var(--muted);font-size:.95rem}
.files-note{font-size:.9rem;color:var(--muted);margin-top:1rem}
.decisions{margin-top:3.5rem;display:grid;grid-template-columns:minmax(0,1fr);gap:2rem}
@media (min-width:60rem){.decisions{grid-template-columns:1fr 1fr 1fr;gap:3rem}}
.decisions h3{font-size:1.15rem;margin-bottom:.5rem}
.decisions p{font-size:.97rem;margin:0}

/* status */
.status{padding-block:clamp(4rem,9vw,7rem)}
.status h2{font-size:clamp(1.9rem,3.6vw,2.8rem);line-height:1.1;margin-bottom:1.25rem;max-width:18ch}
.status .lead{max-width:40rem;margin-bottom:2.5rem}
.phases{list-style:none;margin:0 0 3.5rem;padding:0;display:grid;grid-template-columns:1fr}
@media (min-width:40rem){.phases{grid-template-columns:repeat(5,1fr)}}
.phases li{padding:.9rem 1rem .9rem 0;border-top:2px solid var(--sage)}
@media (min-width:40rem){.phases li{padding-right:1rem}}
.phases strong{display:block;font-family:var(--serif);font-weight:500;font-size:1.1rem}
.phases span{font-size:.9rem;color:var(--muted)}
.gaps-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:2.5rem}
@media (min-width:60rem){.gaps-grid{grid-template-columns:4fr 8fr;gap:5rem}}
.gaps-grid h3{font-size:1.5rem}
.gaps{list-style:none;margin:0;padding:0}
.gaps li{padding-block:1rem;border-top:1px solid var(--line)}
.gaps li:last-child{border-bottom:1px solid var(--line)}
.gaps strong{display:block;margin-bottom:.15rem}
.gaps span{color:var(--muted)}
.close{margin-top:4.5rem;padding-top:2.5rem;border-top:3px solid var(--ink)}
.close p.big{font-family:var(--serif);font-size:clamp(1.6rem,3.2vw,2.4rem);line-height:1.2;letter-spacing:-.015em;max-width:28ch;margin-bottom:1.5rem}
.close p.small{color:var(--muted);font-size:.97rem}

/* footer */
.site-footer{border-top:1px solid var(--line);padding-block:1.75rem;font-size:.95rem}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:.75rem 2rem;justify-content:space-between;align-items:baseline}
.site-footer nav{display:flex;flex-wrap:wrap;gap:.4rem 1.5rem}
.site-footer a{color:var(--ink)}
.site-footer p{margin:0;max-width:none}

/* v2 product homepage */
.hero h1.long{max-width:17ch}
.ledger{margin:0;border:1px solid var(--ink);background:var(--sand)}
.ledger dl{margin:0}
.ledger dl div{display:grid;grid-template-columns:6.5rem 1fr;gap:1rem;padding:.9rem 1rem;border-top:1px solid var(--line)}
.ledger dl div:first-child{border-top:0}
.ledger dt{font-weight:600}
.ledger dd{margin:0}
.ledger dd span{display:block;color:var(--muted);font-size:.92rem}
.ledger figcaption{padding:.7rem 1rem;border-top:1px solid var(--ink);font-size:.88rem;color:var(--muted)}
.problem{padding-block:clamp(4rem,9vw,7rem)}
.problem .wrap,.who .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:2.5rem}
@media (min-width:60rem){.problem .wrap{grid-template-columns:5fr 7fr;gap:5rem}.who .wrap{grid-template-columns:4fr 8fr;gap:5rem}}
.problem h2,.who h2{font-size:clamp(1.9rem,3.6vw,2.8rem);line-height:1.1;margin-bottom:1rem}
.resp{margin:0}
.resp div{padding-block:1rem;border-top:1px solid var(--ink)}
.resp dt{font-family:var(--serif);font-size:1.3rem;margin-bottom:.2rem}
.resp dd{margin:0;color:var(--muted)}
.note{color:var(--muted);font-size:.95rem}
.dark .decisions{margin-top:0}
.dark .decisions p{color:var(--dark-muted)}
.dark .more{margin:2.5rem 0 0}
.who{padding-block:clamp(3rem,7vw,5rem);background:var(--sand)}
.who ul{list-style:none;margin:0;padding:0}
.who li{padding-block:1rem;border-top:1px solid var(--line)}
.who strong{display:block;font-family:var(--serif);font-weight:500;font-size:1.25rem}
.who li span{color:var(--muted)}
.craft{padding-block:clamp(3.5rem,8vw,5.5rem)}
.craft .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:1.5rem}
@media (min-width:60rem){.craft .wrap{grid-template-columns:5fr 7fr;gap:5rem}}
.craft h2{font-size:clamp(1.7rem,3.2vw,2.4rem);line-height:1.1}
.craft .stackline{font-family:var(--serif);font-size:1.25rem;line-height:1.5;margin-bottom:1rem}
.dir{margin:0 0 3rem;padding:0;list-style:none}
.dir li{padding-block:.8rem;border-top:1px solid var(--line)}
.setup{background:var(--ink);color:var(--bg);padding:1rem;overflow-x:auto;font-size:.8rem;line-height:1.6;margin:0 0 1rem}

/* workflow */
.workflow{padding-block:clamp(3.5rem,8vw,6rem);background:var(--sand)}
.workflow .sec-head p{color:var(--muted)}
.flow{list-style:none;margin:0;padding:0;counter-reset:s;display:grid;grid-template-columns:minmax(0,1fr);gap:0;border-top:1px solid var(--ink)}
@media (min-width:60rem){.flow{grid-template-columns:repeat(4,minmax(0,1fr))}}
.flow li{counter-increment:s;padding:1.25rem 1.25rem 1.5rem 0;border-bottom:1px solid var(--line)}
@media (min-width:60rem){.flow li{border-bottom:0;padding-right:1.5rem}.flow li+li{padding-left:1.5rem;border-left:1px solid var(--line)}}
.flow li::before{content:counter(s);display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;margin-bottom:.8rem;border:1px solid var(--rust-fill);color:var(--rust);font-family:var(--mono);font-size:.9rem}
.flow h3{font-size:1.3rem;margin-bottom:.5rem}
.flow p{font-size:.97rem;color:var(--muted)}
.flow pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:.7rem .8rem;background:var(--bg);border:1px solid var(--line);overflow-x:auto;font-size:.76rem;line-height:1.6}

/* roadmap */
@media (min-width:40rem){.phases.three{grid-template-columns:repeat(3,1fr)}}
.phases li.next{border-top-color:var(--rust-fill)}
.phases li.later{border-top-color:var(--line)}
.phases li strong{margin-bottom:.25rem}
.founder{max-width:40rem;margin:0 0 3rem}

/* rule matcher */
.try{margin-top:3.5rem;padding-top:2rem;border-top:1px solid var(--ink)}
.try h3{font-size:1.5rem;margin-bottom:.5rem}
.try .note{margin-bottom:1.5rem}
.try-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:2rem}
@media (min-width:48rem){.try-grid{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:3rem}}
.try-in label{display:block;font-weight:600;margin-bottom:.3rem}
.try-in input{display:block;width:100%;margin-bottom:1.1rem;padding:.65rem .75rem;font:inherit;font-family:var(--mono);font-size:.95rem;color:var(--ink);background:var(--bg);border:1px solid var(--ink);border-radius:2px}
.try-rules{list-style:none;margin:0;padding:0}
.try-rules li{display:grid;gap:.1rem;padding:.8rem 1rem;border:1px solid var(--line);border-left:4px solid var(--line);margin-bottom:.6rem;background:var(--bg)}
.try-rules li.hit{border-left-color:var(--rust-fill);border-color:var(--ink);border-left-width:4px}
.try-rules li span{font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.try-rules li b{font-weight:600}
.try-rules li.miss{color:var(--muted)}
.try-sum{margin:.8rem 0 0;font-weight:600;max-width:none}

/* event spine: a thin line that follows the page like an event down the pipeline */
@media (min-width:82rem){
  body{position:relative}
  body::before{content:"";position:absolute;z-index:2;top:4.6rem;bottom:0;left:calc(50% - 38.5rem);width:1px;background:var(--rust-fill);pointer-events:none}
  main>section{position:relative}
  main>section::before{content:"";position:absolute;z-index:3;left:calc(50% - 38.5rem - 4px);top:4.6rem;width:9px;height:9px;background:var(--bg);border:1px solid var(--rust-fill)}
  main>section:first-child::before{top:clamp(4rem,8vw,6.5rem)}
}

/* motion: purposeful, and off entirely under prefers-reduced-motion */
@media (prefers-reduced-motion:reduce){.packet{display:none}}
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
  .js .reveal.in{opacity:1;transform:none}
  /* hero: the event is traced down the ledger row by row */
  .js .ledger dl{position:relative}
  .js .ledger dl::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--rust-fill);transform-origin:top;transform:scaleY(0);animation:trace 1.6s ease .3s forwards;z-index:1}
  .js .ledger dl div{opacity:0;transform:translateY(8px);animation:rowin .5s ease forwards;animation-delay:calc(.35s + var(--i,0) * .35s)}
  @keyframes rowin{to{opacity:1;transform:none}}
  @keyframes trace{to{transform:scaleY(1)}}
  /* spine draws itself once on load (wide screens only) */
  @media (min-width:82rem){body::before{transform-origin:top;animation:trace 1.8s ease .2s both}}
  /* pipeline: a packet crosses the six stages and each stage lights as it passes */
  .overview .packet{fill:var(--rust-light);animation:travel 9s linear infinite}
  @keyframes travel{0%{opacity:0;transform:translateX(0)}4%{opacity:1}96%{opacity:1}100%{opacity:0;transform:translateX(956px)}}
  .overview .box{animation:lit 9s linear infinite}
  .overview .box:nth-of-type(2){animation-delay:1.563s}
  .overview .box:nth-of-type(3){animation-delay:3.126s}
  .overview .box:nth-of-type(4){animation-delay:4.689s}
  .overview .box:nth-of-type(5){animation-delay:6.252s}
  .overview .box:nth-of-type(6){animation-delay:7.815s}
  @keyframes lit{0%,13%{stroke:var(--rust-light);stroke-width:2.2}20%,100%{stroke:var(--dark-muted);stroke-width:1}}
  .overview .box.last{animation-name:lit}
}