@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:100 700;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-wght-normal.woff2) format('woff2')}
  @font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-400-normal.woff2) format('woff2')}
  @font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-500-normal.woff2) format('woff2')}

  :root{
    --ground:#F6F7F9;--surface:#FFFFFF;--sunken:#EFF1F4;--rule:#E6E8EC;--rule-strong:#92959A;
    --ink:#0F1419;--ink-2:#3A4149;--ink-3:#6A727D;
    --ok-text:#00823A;--ok-mark:#00A54B;--ok-soft:#DBFCE0;
    --attention-text:#996600;--attention-mark:#C08100;--attention-soft:#FFEECD;
    --brand-green:#09AF51;
    --sans:'IBM Plex Sans',system-ui,sans-serif;--mono:'IBM Plex Mono',ui-monospace,monospace;
    --maxw:1200px;--pad:clamp(16px,4vw,48px);--ease:cubic-bezier(.2,.8,.2,1);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{background:var(--ground);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
  a{color:inherit;text-decoration:none}
  a:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
  ::selection{background:var(--ok-soft);color:var(--ok-text)}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
  .label{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
  .num{display:inline-block;background:var(--ok-soft);color:var(--ok-text);padding:1px 6px;margin-right:8px}
  h1,h2,h3{font-weight:500;letter-spacing:-.02em;text-wrap:balance}
  h2{font-size:clamp(30px,3.6vw,42px);line-height:1.1;margin:14px 0 14px}
  .lede{font-size:18px;color:var(--ink-2);max-width:620px}
  .btn{display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:4px;font-size:15px;font-weight:500;transition:background .15s var(--ease)}
  .btn.primary{background:var(--ink);color:#fff}
  .btn.primary:hover{background:#262c33}
  .btn.ghost{border:1px solid var(--rule-strong);color:var(--ink)}
  .btn.ghost:hover{background:var(--surface)}
  section{border-bottom:1px solid var(--rule);scroll-margin-top:64px}
  .sec{padding-top:clamp(56px,8vw,96px);padding-bottom:clamp(56px,8vw,96px)}
  code,.m{font-family:var(--mono);font-size:.9em}

  /* logo: logo/final-wave/inteqral-logo-color.svg, one symbol-grid unit to the pixel at 24px */
  .logo{display:block;height:24px;width:auto;flex:none}

  /* nav */
  header{position:sticky;top:0;z-index:10;background:rgba(246,247,249,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
  header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
  header nav{display:flex;gap:28px;font-size:15px;color:var(--ink-2)}
  header nav a:hover{color:var(--ink)}
  @media (max-width:760px){header nav{display:none}}
  .menu{display:none}
  @media (max-width:760px){
    header .wrap{gap:8px}
    header .wrap > a:first-child{margin-right:auto}
    header .wrap > .btn{order:1}
    .menu{order:2;display:grid;place-items:center;width:40px;height:40px;padding:0;border:1px solid var(--rule-strong);border-radius:4px;background:none;color:var(--ink);cursor:pointer}
    .menu svg{display:block;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round}
    .menu .x,header.open .menu .bars{display:none}
    header.open .menu .x{display:block}
    header.open nav{display:flex;flex-direction:column;gap:0;position:absolute;top:100%;left:0;right:0;padding:4px var(--pad) 16px;background:var(--ground);border-bottom:1px solid var(--rule);font-size:18px}
    header.open nav a{padding:14px 0;border-top:1px solid var(--rule)}
    header.open nav a:first-child{border-top:0}
  }
  @media (max-width:359px){header .wrap > .btn{display:none}}

  /* hero */
  .hero{display:grid;grid-template-columns:1fr 1fr}
  .hero .copy{padding:clamp(48px,7vw,88px) clamp(24px,4vw,56px) clamp(48px,7vw,88px) 0}
  .hero .copy{display:flex;flex-direction:column;justify-content:center}
  .hero h1{font-size:clamp(38px,5vw,60px);line-height:1.05;margin:18px 0}
  .hero .row{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
  .spec{padding:clamp(40px,6vw,72px) 0 clamp(40px,6vw,72px) clamp(24px,4vw,56px);display:flex;flex-direction:column;justify-content:center}
  .img{position:relative;aspect-ratio:16/10;overflow:hidden;isolation:isolate;border:1px solid var(--rule)}
  .img .art{display:block;width:100%;height:100%}
  .filebar{display:flex;justify-content:space-between;align-items:center;height:36px;padding:0 14px;background:var(--surface);border:1px solid var(--rule);border-bottom:0;font-family:var(--mono);font-size:12px;color:var(--ink-3)}
  .filebar span:first-child{display:flex;align-items:center;gap:8px;color:var(--ink-2)}
  .filebar svg{width:14px;height:14px}
  table.readout{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--rule);border-top:0;font-size:14px}
  .readout td{padding:9px 14px;border-top:1px solid var(--rule);vertical-align:top}
  .readout td:first-child{width:36%;font-family:var(--mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-3);padding-top:11px}
  .readout td.m{font-size:13px}
  .pill{display:inline-flex;gap:6px;align-items:center;padding:1px 8px;font-size:13px;font-weight:500}
  .pill i{width:6px;height:6px;border-radius:50%}
  .pill.ok{background:var(--ok-soft);color:var(--ok-text)} .pill.ok i{background:var(--ok-mark)}
  .pill.att{background:var(--attention-soft);color:var(--attention-text)} .pill.att i{background:var(--attention-mark)}
  @media (max-width:900px){.hero{grid-template-columns:1fr}.hero .copy{border-right:0;padding-right:0}.spec{padding:0 0 48px}}

  /* services */
  .svc{display:grid;grid-template-columns:repeat(3,1fr);margin-top:40px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
  .svc a,.svc div{padding:28px 28px 28px 0;color:var(--ink-2);font-size:16px;line-height:1.5}
  .svc > :nth-child(n+2){padding-left:28px;border-left:1px solid var(--rule)}
  .svc .label{display:block;line-height:1}
  .svc h3{font-size:22px;color:var(--ink);margin:14px 0 8px;line-height:1.2}
  .svc .go{display:table;margin-top:16px;font-size:15px;line-height:1.3;color:var(--ink);border-bottom:1px solid var(--rule-strong)}
  .svc a:hover .go{border-color:var(--ink)}
  .svc .dim h3{color:var(--ink-3)}
  @media (max-width:900px){.svc{grid-template-columns:1fr}.svc > :nth-child(n+2){padding-left:0;border-left:0;border-top:1px solid var(--rule)}}

  /* api */
  .split{display:grid;grid-template-columns:5fr 6fr;gap:clamp(24px,4vw,56px);margin-top:44px;align-items:start}
  .endpoints{border-top:1px solid var(--rule)}
  .ep{padding:22px 0;border-bottom:1px solid var(--rule)}
  .ep .m{display:inline-block;font-size:13px;background:var(--surface);border:1px solid var(--rule);padding:2px 8px;color:var(--ink)}
  .ep h3{font-size:20px;margin:10px 0 6px}
  .ep p{font-size:16px;color:var(--ink-2)}
  .code{background:var(--surface);border:1px solid var(--rule);overflow:hidden}
  .code .bar{display:flex;border-bottom:1px solid var(--rule);background:var(--sunken)}
  .code .bar button{appearance:none;background:none;border:0;border-right:1px solid var(--rule);font:inherit;font-family:var(--mono);font-size:12px;padding:9px 16px;color:var(--ink-3);cursor:pointer}
  .code .bar button[aria-selected="true"]{background:var(--surface);color:var(--ink);margin-bottom:-1px}
  .code .bar button:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}
  .code pre[hidden]{display:none}
  .code pre{font-family:var(--mono);font-size:13px;line-height:1.75;color:var(--ink-2);padding:18px 20px;overflow-x:auto}
  .code pre .c{color:var(--ink-3)}
  .code pre .k{color:var(--ink);font-weight:500}
  .code pre .ok{color:var(--ok-text)}
  .dx{display:grid;grid-template-columns:repeat(3,1fr);margin-top:56px;border-top:1px solid var(--rule)}
  .dx div{padding:24px 24px 24px 0;border-bottom:1px solid var(--rule);font-size:15px;color:var(--ink-2)}
  .dx div:not(:nth-child(3n+1)){padding-left:24px;border-left:1px solid var(--rule)}
  .dx h4{font-size:16px;font-weight:500;color:var(--ink);margin-bottom:6px}
  @media (max-width:900px){.split{grid-template-columns:1fr}.dx{grid-template-columns:1fr}.dx div:not(:nth-child(3n+1)){padding-left:0;border-left:0}}

  /* n8n */
  .flow{display:flex;align-items:center;gap:0;margin-top:48px;overflow-x:auto;padding-bottom:4px}
  .node{flex:0 0 300px;display:flex;align-items:flex-start;gap:16px;padding:20px 22px;background:var(--surface);border:1px solid var(--rule);font-size:15px;color:var(--ink-3)}
  .node .ng{flex:none;display:grid;place-items:center;width:44px;height:44px;background:var(--sunken);color:var(--ink-2)}
  .node .ng svg{display:block;width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
  .node .nt{display:flex;flex-direction:column;gap:4px;min-width:0}
  .node b{font-size:22px;font-weight:500;color:var(--ink);line-height:1.2}
  .node.on{border-color:var(--ink)}
  .node.on .ng{background:none}
  .node.on .ng svg{width:44px;height:44px;stroke:none}
  .flow .link{flex:0 0 84px;display:block;overflow:visible}
  .recipes-label{margin-top:48px}
  .recipes{display:grid;grid-template-columns:repeat(4,1fr);margin-top:12px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
  .recipes div{padding:24px 24px 24px 0}
  .recipes > :nth-child(n+2){padding-left:24px;border-left:1px solid var(--rule)}
  .recipes .label{display:block;line-height:1}
  .recipes h4{font-size:18px;font-weight:500;margin:0 0 6px;line-height:1.3}
  .recipes h4 i{font-style:normal;color:var(--ok-text);padding:0 4px}
  .recipes p{font-size:15px;color:var(--ink-2)}
  @media (max-width:900px){.recipes{grid-template-columns:1fr}.recipes > :nth-child(n+2){padding-left:0;border-left:0;border-top:1px solid var(--rule)}}
  .note{margin-top:20px;font-size:14px;color:var(--ink-3)}
  /* publishing */
  .systems{display:grid;grid-template-columns:1fr 1fr;margin-top:44px;border:1px solid var(--rule);background:var(--surface)}
  .systems div{padding:28px}
  .systems div+div{border-left:1px solid var(--rule)}
  .systems h3{font-size:26px;margin:8px 0 6px}
  .systems p{color:var(--ink-2);font-size:16px}
  .caps{display:grid;grid-template-columns:5fr 6fr;gap:clamp(24px,4vw,56px);margin-top:56px;align-items:start}
  .cap{padding:20px 0;border-bottom:1px solid var(--rule)}
  .cap:first-child{border-top:1px solid var(--rule)}
  .cap h4{font-size:18px;font-weight:500;margin-bottom:4px}
  .cap p{font-size:16px;color:var(--ink-2)}
  .trace{display:flex;flex-direction:column;gap:12px}
  .tc{background:var(--surface);border:1px solid var(--rule)}
  .tc blockquote{padding:16px 18px 12px;font-size:16px;color:var(--ink);line-height:1.55}
  .tc del{color:var(--attention-text);text-decoration:line-through}
  .tc ins{background:var(--attention-soft);text-decoration:none}
  .tc footer{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center;padding:10px 18px;border-top:1px solid var(--rule);font-size:13px;color:var(--ink-3)}
  .tc footer .m{color:var(--ink-2)}
  @media (max-width:900px){.systems,.caps{grid-template-columns:1fr}.systems div+div{border-left:0;border-top:1px solid var(--rule)}}

  /* foundations */
  .grid4{display:grid;grid-template-columns:repeat(4,1fr);margin-top:44px;border-top:1px solid var(--rule)}
  .grid4 div{padding:24px 24px 24px 0;font-size:15px;color:var(--ink-2)}
  .grid4 div+div{padding-left:24px;border-left:1px solid var(--rule)}
  .grid4 h3{font-size:19px;color:var(--ink);margin:10px 0 6px}
  @media (max-width:900px){.grid4{grid-template-columns:1fr 1fr}.grid4 div:nth-child(3){padding-left:0;border-left:0}.grid4 div:nth-child(n+3){border-top:1px solid var(--rule)}}
  @media (max-width:560px){.grid4{grid-template-columns:1fr}.grid4 div{padding-left:0!important;border-left:0!important}.grid4 div+div{border-top:1px solid var(--rule)}}

  /* use cases */
  .uses{margin-top:40px;border-top:1px solid var(--rule)}
  .use{display:grid;grid-template-columns:4fr 7fr;gap:24px;padding:26px 0;border-bottom:1px solid var(--rule)}
  .use h3{font-size:22px}
  .use p{color:var(--ink-2);font-size:16px}
  @media (max-width:760px){.use{grid-template-columns:1fr;gap:6px}}

  /* access */
  .access{background:var(--ink);color:#F4F6F5;border-bottom:0}
  .access .label{color:#9AA3AD}
  .access .inner{display:flex;justify-content:space-between;align-items:end;gap:32px;flex-wrap:wrap}
  .access p{color:#C4CAD0;max-width:560px;font-size:18px}
  .access .btn{background:#F4F6F5;color:var(--ink)}
  .access .btn:hover{background:#fff}
  .access .mail{display:block;font-family:var(--mono);font-size:13px;color:#9AA3AD;margin-top:12px}
  footer.site{padding:28px 0;font-size:14px;color:var(--ink-3)}
  footer.site .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}

  h1 .w{display:inline-block;opacity:0;transform:translateY(.4em);animation:rise .7s var(--ease) forwards}
  h1 .w:nth-child(2){animation-delay:.08s}h1 .w:nth-child(3){animation-delay:.16s}h1 .w:nth-child(4){animation-delay:.24s}h1 .w:nth-child(5){animation-delay:.32s}
  @keyframes rise{to{opacity:1;transform:none}}
  @media (prefers-reduced-motion:reduce){h1 .w{animation:none;opacity:1;transform:none}}
  .tc.att .typed{display:none}
  .tc.att.typing .typed{display:inline}
  .tc.att.typing .marked{display:none}
  .tc.att .typed:after{content:"";display:inline-block;width:2px;height:1em;background:var(--ink);vertical-align:-.15em;margin-left:1px;animation:blink .9s steps(1) infinite}
  @keyframes blink{50%{opacity:0}}
  .tc.att del,.tc.att ins,.tc.att footer{transition:color .4s,background .4s,text-decoration-color .4s,opacity .4s var(--ease)}
  .tc.att.plain del:empty{display:none}
  .tc.att.plain:not(.hl) ins{background:none}
  .tc.att.plain del.caret:after{content:"";display:inline-block;width:2px;height:1em;background:var(--attention-text);vertical-align:-.15em;margin-left:1px;animation:blink .9s steps(1) infinite}
  .tc.att footer{max-height:80px;overflow:hidden;transition:opacity .4s var(--ease),max-height .4s var(--ease),padding .4s var(--ease),border-color .4s}
  .tc.att.typing footer{opacity:0;max-height:0;padding-top:0;padding-bottom:0;border-top-color:transparent}

  /* ===== v2 ===== */
  section{border-bottom:0}
  .sec{padding-top:clamp(64px,9vw,128px);padding-bottom:clamp(64px,9vw,128px)}
  h2{font-size:clamp(34px,4.2vw,54px);line-height:1.04;letter-spacing:-.028em;margin:16px 0 18px}
  .lede{font-size:19px;line-height:1.55}
  .surface{background:var(--surface)}
  .dark{background:#0F1419;color:#F4F6F5;--ink:#F4F6F5;--ink-2:#B4BCC4;--ink-3:#8A939C;--rule:#252C33;--rule-strong:#4A525A;--surface:#161C22;--sunken:#11171C;--ok-text:#2BC46A;--ok-soft:rgba(43,196,106,.14)}
  .dark ::selection{background:#2BC46A;color:#0F1419}
  .sec > .label .num{background:none;color:inherit;padding:0;margin-right:10px}

  /* poster */
  .poster{--H:clamp(560px,50vw,760px);position:relative;height:var(--H);overflow:hidden;border-bottom:1px solid var(--rule)}
  .poster .wrap{position:relative;z-index:2;height:100%;display:flex;align-items:center;pointer-events:none}
  .poster .copy{width:min(46%,560px);pointer-events:auto}
  .poster h1{font-size:clamp(44px,4.5vw,68px);line-height:1;letter-spacing:-.035em;margin:20px 0 22px}
  .poster .lede{font-size:18px;max-width:30em}
  .poster .row{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}
  .stage{position:absolute;top:0;left:calc(50% - 40px);height:var(--H);width:calc(var(--H) * 3)}
  .stage .art{position:absolute;inset:0;width:100%;height:100%;display:block}
  .stage .card{position:absolute;right:79.1667%;top:62.5%;width:clamp(300px,25vw,360px);background:var(--surface)}
  .stage .card .filebar{border-color:var(--ink)}
  .stage .card .readout{border-color:var(--ink)}
  .stage .card .readout td{padding:7px 14px}
  .stage .card .readout td.m{white-space:nowrap}
  @media (max-width:1180px){.poster .stage{left:calc(50% - 80px)}.poster .copy{width:calc(42% - 32px)}}
  @media (max-width:1023px){
    .poster{height:auto;overflow:visible;display:flex;flex-direction:column-reverse}
    .poster .wrap{height:auto;display:block;padding-top:56px;padding-bottom:40px}
    .poster .copy{width:auto;max-width:600px}
    .poster .stage{position:relative;left:0;width:auto;height:auto;padding-bottom:32px}
    .poster .stage .art{position:relative;inset:auto;height:300px;width:100%}
    .poster .stage .card{position:relative;right:auto;top:auto;width:auto;max-width:420px;margin:-64px var(--pad) 0}
    .poster .leader{display:none}
  }


  /* intro: the life of a file */
  .intro{border-bottom:1px solid var(--rule)}
  .intro .wrap{padding-top:clamp(56px,7vw,96px);padding-bottom:clamp(56px,7vw,88px)}
  .intro-top{display:grid;grid-template-columns:7fr 5fr;gap:clamp(24px,4vw,64px);align-items:end}
  .intro h1{font-size:clamp(44px,5.6vw,80px);line-height:1;letter-spacing:-.035em;margin:20px 0 0}
  .intro-side .lede{font-size:18px}
  .intro-side .row{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
  .life{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:40px;margin-top:clamp(48px,6vw,80px)}
  .step{display:flex;flex-direction:column;align-items:flex-start}
  .step h3{font-size:18px;line-height:1.2;margin:18px 0 6px}
  .step p{font-size:14.5px;line-height:1.5;color:var(--ink-2);flex:1;margin-bottom:14px}
  .frame{position:relative;width:100%;aspect-ratio:1;border:1px solid var(--rule)}
  .frame svg{display:block;width:100%;height:100%}
  .frame.dashed{border:1px dashed var(--rule-strong)}
  .frame .tag{position:absolute;left:8px;bottom:8px;background:var(--surface);border:1px solid var(--rule);font-family:var(--mono);font-size:11px;line-height:1;padding:4px 6px;color:var(--ink-2)}
  .step:not(:last-child) .frame:after{content:"";position:absolute;top:50%;left:100%;width:40px;height:10px;margin-top:-5px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 10'%3E%3Cline x1='0' y1='5' x2='33' y2='5' stroke='%2392959A' stroke-width='1.5'/%3E%3Cpath d='M32 1.5L39 5L32 8.5Z' fill='%2392959A'/%3E%3C/svg%3E") center/contain no-repeat}
  .step.to-lost .frame:after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 10'%3E%3Cline x1='0' y1='5' x2='33' y2='5' stroke='%23C08100' stroke-width='1.5' stroke-dasharray='3 3'/%3E%3Cpath d='M32 1.5L39 5L32 8.5Z' fill='%23C08100'/%3E%3C/svg%3E")}
  .step.to-found .frame:after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 10'%3E%3Cline x1='0' y1='5' x2='33' y2='5' stroke='%2300A54B' stroke-width='1.5'/%3E%3Cpath d='M32 1.5L39 5L32 8.5Z' fill='%2300A54B'/%3E%3C/svg%3E")}
  .pill.inert{background:var(--sunken);color:var(--ink-3)} .pill.inert i{background:#92959A}
  @media (max-width:1023px){.intro-top{grid-template-columns:1fr;align-items:start}}
  @media (max-width:900px){
    .life{grid-template-columns:1fr;gap:28px}
    .step{display:grid;grid-template-columns:96px 1fr;column-gap:18px;align-items:start}
    .step .frame{grid-row:1 / span 3}
    .step h3{margin-top:2px}
    .step .pill{justify-self:start}
    .frame .tag{left:4px;bottom:4px;font-size:9px;padding:2px 4px;white-space:nowrap}
    .step:not(:last-child) .frame:after{top:100%;left:50%;width:10px;height:28px;margin:0 0 0 -5px;transform:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 28'%3E%3Cline x1='5' y1='0' x2='5' y2='21' stroke='%2392959A' stroke-width='1.5'/%3E%3Cpath d='M1.5 20L5 27L8.5 20Z' fill='%2392959A'/%3E%3C/svg%3E")}
    .step.to-lost .frame:after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 28'%3E%3Cline x1='5' y1='0' x2='5' y2='21' stroke='%23C08100' stroke-width='1.5' stroke-dasharray='3 3'/%3E%3Cpath d='M1.5 20L5 27L8.5 20Z' fill='%23C08100'/%3E%3C/svg%3E")}
    .step.to-found .frame:after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 28'%3E%3Cline x1='5' y1='0' x2='5' y2='21' stroke='%2300A54B' stroke-width='1.5'/%3E%3Cpath d='M1.5 20L5 27L8.5 20Z' fill='%2300A54B'/%3E%3C/svg%3E")}
  }
  /* ways in */
  .entries{display:grid;grid-template-columns:repeat(3,1fr);margin-top:56px}
  .entry{padding-right:clamp(20px,2.4vw,32px)}
  .entry+.entry{padding-left:clamp(20px,2.4vw,32px);border-left:1px solid var(--rule)}
  .entry{position:relative;display:flex;flex-direction:column;color:var(--ink-2);font-size:16px;line-height:1.5}
  .entry .label{display:block;line-height:1}
  .entry h3{font-size:24px;color:var(--ink);margin:16px 0 10px;line-height:1.2}
  .entry p{flex:1}
  .entry .go{align-self:flex-start;margin-top:18px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--rule-strong)}
  .entry:hover .go{border-color:var(--ink)}
  .layer{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:#0F1419;color:#F4F6F5;padding:20px 24px}
  .layer .sym{width:30px;height:30px;flex:none}
  .layer b{font-size:20px;font-weight:500;letter-spacing:-.01em;margin-right:auto}
  .layer .ops{display:flex;gap:8px}
  .layer .ops span{font-family:var(--mono);font-size:13px;color:#C4CAD0;border:1px solid #3A424A;padding:4px 12px}
  @media (max-width:900px){.entries{grid-template-columns:1fr;gap:0}.entry{padding-bottom:32px;padding-right:0}.entry+.entry{border-left:0;padding-left:0;border-top:1px solid var(--rule);padding-top:28px}}

  /* api on dark */
  .dark .ep .m{background:transparent;border-color:var(--rule-strong)}
  .dark .code{border-color:var(--rule)}
  .dark .code .bar{border-color:var(--rule)}
  .dark .code .bar button{border-color:var(--rule)}
  .dark .code pre{color:#B4BCC4}
  .dark .code pre .c{color:#6E7781}

  @media (max-width:760px){
    .flow{flex-direction:column;align-items:stretch;overflow:visible}
    .flow .node{flex:none;width:100%}
    .flow .link{flex:none;align-self:center;width:48px;height:48px;transform:rotate(90deg)}
  }
  /* publishing on white */
  .surface .systems{background:var(--ground)}
  .surface .trace{background:var(--ground);border:1px solid var(--rule);padding:clamp(16px,2vw,28px)}
  .surface .tc blockquote{font-size:18px}

  /* foundations */
  .found{display:grid;grid-template-columns:4fr 8fr;gap:clamp(24px,5vw,72px);align-items:start}
  .found-head{position:sticky;top:96px}
  .found-head h2{margin-top:0}
  .facts{display:grid;grid-template-columns:1fr 1fr;column-gap:clamp(24px,4vw,56px)}
  .fact{padding:28px 0 36px;border-top:1px solid var(--ink)}
  .fact .label{display:block;line-height:1}
  .fact h3{font-size:clamp(24px,2.4vw,32px);line-height:1.1;margin:18px 0 12px}
  .fact p{font-size:16px;color:var(--ink-2)}
  @media (max-width:900px){.found{grid-template-columns:1fr}.found-head{position:static}.facts{grid-template-columns:1fr}}

  /* closing */
  .closing{position:relative;overflow:hidden;--H:clamp(440px,36vw,560px)}
  .closing .stage{left:52%;right:0;top:0;bottom:0;width:auto;height:auto}
  .closing .wrap{position:relative;z-index:2}
  .closing h2{font-size:clamp(48px,6.4vw,92px);letter-spacing:-.04em;margin:0 0 20px;color:#F4F6F5}
  .closing p{font-size:19px;color:#B4BCC4;max-width:28em}
  .closing .row{display:flex;gap:20px;align-items:center;margin-top:36px;flex-wrap:wrap}
  .btn.light{background:#F4F6F5;color:#0F1419}
  .btn.light:hover{background:#fff}
  .closing .mail{font-family:var(--mono);font-size:13px;color:#8A939C}
  @media (max-width:1023px){.closing .stage{display:none}}
  /* signed checks */
  #checks{border-bottom:1px solid var(--rule)}
  .ck-h{font-size:clamp(24px,2.4vw,30px);line-height:1.15;margin-bottom:12px}
  .ck-p{font-size:17px;color:var(--ink-2);max-width:34em}
  .ck-facts{margin-top:28px}
  .byo{display:grid;grid-template-columns:5fr 6fr;gap:clamp(24px,4vw,56px);margin-top:clamp(56px,7vw,88px);padding-top:clamp(28px,3vw,40px);border-top:1px solid color-mix(in srgb,var(--rule),var(--rule-strong) 30%)}
  .byo h3{font-size:clamp(24px,2.4vw,30px);line-height:1.15;margin-bottom:12px}
  .byo p{font-size:16px;color:var(--ink-2)}
  .kinds{list-style:none;display:flex;flex-wrap:wrap;gap:10px;align-content:flex-start;margin-top:24px}
  .run{list-style:none;border-top:1px solid var(--rule)}
  .run li{padding:18px 0;border-bottom:1px solid var(--rule)}
  .run .label{display:block;line-height:1}
  .run h4{font-size:18px;font-weight:500;margin:10px 0 4px;line-height:1.3}
  .run p{font-size:15px;color:var(--ink-2)}
  .kinds li{background:var(--surface);border:1px dashed var(--rule-strong);padding:8px 14px;font-size:15px;color:var(--ink-2)}
  .ckx{position:relative;container-type:inline-size}
  .ckx.snap *{transition:none!important}
  .ckx-wires{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
  .ckx-wire{fill:none;stroke:var(--rule-strong);stroke-width:1;stroke-linejoin:miter}
  .ckx-head{fill:var(--rule-strong)}
  .ckx-wire.run{stroke:var(--ink-2);stroke-width:1.25;stroke-dasharray:var(--len);stroke-dashoffset:var(--len);transition:stroke-dashoffset .55s var(--ease)}
  .ckx-wire.run.on{stroke-dashoffset:0}
  .ckx-head.run{fill:var(--ink-2);opacity:0;transition:opacity .1s linear}
  .ckx-head.run.on{opacity:1;transition-delay:.45s}
  .ckx-grid{display:grid;grid-template-columns:210px 1fr;column-gap:56px;align-items:center}
  .ckx-steps{display:flex;flex-direction:column;gap:28px}
  .ckx-node{position:relative;z-index:1;background:var(--surface);border:1px solid var(--rule);padding:12px 14px}
  .ckx-node.yours{border:1px dashed var(--rule-strong)}
  .ckx-st{display:flex;align-items:center;gap:8px;font-size:13px;line-height:18px}
  .ckx-st i{flex:none;width:8px;height:8px;border-radius:50%;background:var(--ok-mark)}
  .ckx-node.run .ckx-st i{width:10px;border-radius:0;background:var(--attention-mark);clip-path:polygon(50% 0,100% 100%,0 100%)}
  .ckx-node.wait .ckx-st i{height:2px;border-radius:0;background:var(--rule-strong)}
  .ckx-time{font-family:var(--mono);font-size:12px;color:var(--ink-3)}
  .ckx-node b{display:block;font-size:14px;font-weight:500;line-height:21px}
  .ckx-from{display:block;font-family:var(--mono);font-size:12px;line-height:17px;color:var(--ink-2)}
  .ckx-src{display:flex;align-items:center;gap:10px;padding:8px 12px 8px 8px}
  .ckx-src svg{flex:none;width:48px;height:36px;border:1px solid var(--rule)}
  .ckx-src .m{display:block;font-size:12px;color:var(--ink-2);white-space:nowrap}
  .ckx-src .label{font-size:11px;line-height:1}
  .ckx-card{position:relative;z-index:1;background:var(--surface);border:1px solid var(--rule)}
  .ckx-top{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:2px 12px;padding:12px 14px;border-bottom:1px solid var(--rule)}
  .ckx-top b{font-size:15px;font-weight:500;line-height:22px}
  .ckx-top .label{font-size:11px;line-height:22px}
  .ckx-top .m{flex-basis:100%;font-size:12px;line-height:18px;color:var(--ink-3)}
  .ckx-sec{display:block;padding:7px 14px;background:var(--sunken);border-bottom:1px solid var(--rule);font-size:11px;line-height:16px}
  .ckx-row{border-top:1px solid var(--rule);transition:opacity .45s var(--ease)}
  .ckx-sec + .ckx-row{border-top:0}
  .ckx-row.yours{border-top:1px dashed var(--rule-strong)}
  .ckx-k{display:block;padding:11px 14px 0;font-family:var(--mono);font-size:12px;line-height:17px;color:var(--ink-2);overflow-wrap:anywhere}
  .ckx-v{display:block;padding:4px 14px 11px;font-size:14px}
  .ckx-sub{display:block;margin-top:4px;font-size:13px;color:var(--ink-3)}
  .ckx-out{margin-top:12px;transition:opacity .45s var(--ease)}
  .ckx.live .ckx-row:not(.on){opacity:0}
  .ckx.live:not(.sealed) .ckx-out{opacity:0}
  @container (max-width:539px){.ckx-grid{grid-template-columns:1fr;row-gap:44px}}
  @media (max-width:900px){.byo{grid-template-columns:1fr}}

  /* ===== sub pages ===== */
  :root{--fault-text:#DB1A2B;--fault-mark:#FD4D4D;--fault-soft:#FFE8E4}
  .pill.fault{background:var(--fault-soft);color:var(--fault-text)} .pill.fault i{background:var(--fault-mark)}
  header nav a[aria-current="page"]{color:var(--ink);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:7px}
  .phead{border-bottom:1px solid var(--rule)}
  .phead > .wrap{padding-top:clamp(56px,8vw,112px);padding-bottom:clamp(48px,7vw,96px)}
  .phead h1{font-size:clamp(42px,5.4vw,76px);line-height:1;letter-spacing:-.035em;margin:20px 0 0;max-width:13em}
  .phead .lede{margin-top:24px}
  .phead .row{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}

  /* request and response blocks */
  .ex{background:var(--surface);border:1px solid var(--rule);min-width:0}
  .ex + .ex{border-top:0}
  .ex-h{display:flex;justify-content:space-between;align-items:center;gap:12px;height:34px;padding:0 16px;border-bottom:1px solid var(--rule);background:var(--sunken);font-family:var(--mono);font-size:12px;color:var(--ink-3)}
  .ex pre{font-family:var(--mono);font-size:13px;line-height:1.7;color:var(--ink-2);padding:16px 18px;overflow-x:auto}
  .ex pre .c{color:var(--ink-3)}
  .ex pre .k{color:var(--ink);font-weight:500}
  .ex pre .ok{color:var(--ok-text)}
  .ex pre .bad{color:var(--fault-text)}
  .dark .ex pre .bad{color:#FF8A80}

  /* variant switcher, not part of the design */
  .vbar{background:var(--sunken);border-bottom:1px dashed var(--rule-strong);font-family:var(--mono);font-size:12px;color:var(--ink-3)}
  .vbar .wrap{display:flex;gap:20px;align-items:center;height:34px;overflow-x:auto;white-space:nowrap}
  .vbar a{color:var(--ink-2)}
  .vbar a[aria-current]{color:var(--ink);text-decoration:underline;text-underline-offset:4px}