/* Velvet · white, electric blue, grey. Everything leans: the mark is three slanted bars and the
   page keeps that angle. */
:root{
  --blue:#1B3BE8; --blue-700:#1430BE; --blue-050:#EEF1FE; --grey:#B9BEC9; --grey-100:#EFF1F5;
  --ink:#0B1020; --ink-2:#4A5468; --muted:#7C879B; --line:#E4E7EF; --bg:#FFFFFF;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --shadow:0 1px 2px rgba(11,16,32,.04),0 18px 40px -26px rgba(27,59,232,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink); font-family:var(--sans); font-size:15px; line-height:1.62;
  -webkit-font-smoothing:antialiased; position:relative;
}

/* ---- the ground ----------------------------------------------------------
   Three layers, all fixed, all behind everything: a leaning rule pattern, two soft parallelogram
   washes in the brand's blue and grey, and a faint half-triangle weave. The whole page keeps the
   mark's angle instead of sitting on a blank sheet. */
body::before{
  content:"";position:fixed;inset:-20vh -20vw;z-index:-2;pointer-events:none;
  background:
    /* the two washes, leaning the way the logo does */
    linear-gradient(107deg, rgba(27,59,232,.14) 0 14%, rgba(27,59,232,0) 14.2%) 8vw -10vh/62vw 150vh no-repeat,
    linear-gradient(107deg, rgba(27,59,232,.085) 0 9%, rgba(27,59,232,0) 9.2%) 26vw -10vh/62vw 150vh no-repeat,
    linear-gradient(107deg, rgba(185,190,201,.30) 0 7%, rgba(185,190,201,0) 7.2%) 42vw -10vh/62vw 150vh no-repeat,
    /* the ruling */
    repeating-linear-gradient(107deg, rgba(11,16,32,.045) 0 1px, rgba(11,16,32,0) 1px 108px);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  /* the weave: half squares, the banner's motif, at the edge of visible */
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='72' height='72'><path d='M0 0h36v36H0z' fill='%231B3BE8' fill-opacity='0.042'/><path d='M36 36h36v36H36z' fill='%23B9BEC9' fill-opacity='0.07'/><path d='M36 0l36 36H36z' fill='%231B3BE8' fill-opacity='0.028'/><path d='M36 72L0 36h36z' fill='%23B9BEC9' fill-opacity='0.05'/></svg>");
  background-size:144px 144px;
  /* fade it out where the text lives, keep it at the corners */
  /* it is a GROUND, not a corner: clear behind the masthead and the first fold, present below */
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,0) 0 22%, #000 72%);
          mask-image:linear-gradient(180deg, rgba(0,0,0,0) 0 22%, #000 72%);
}
@media (prefers-reduced-motion: no-preference){
  body::before{animation:drift 60s linear infinite alternate}
}
@keyframes drift{from{transform:translate3d(0,0,0)}to{transform:translate3d(-3vw,1.5vh,0)}}
a{color:inherit}
h1,h2,h3{margin:0;letter-spacing:-.025em;font-weight:600;line-height:1.1}
.skip{position:absolute;left:-9999px}

/* ---- bar ---- */
.bar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:16px;padding:14px 26px;
  background:rgba(255,255,255,.82);backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand b{font-size:16px;letter-spacing:-.01em}
.brand i{font-style:normal;font-size:11px;color:var(--muted);font-family:var(--mono);letter-spacing:.06em}
.nav{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--ink-2);font-size:12.5px;padding:8px 12px;border-radius:8px;transition:.15s}
.nav a:hover{background:var(--blue-050);color:var(--blue)}
.nav a.on{background:var(--blue-050);color:var(--blue);font-weight:500}
.x{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid var(--line);
   border-radius:8px;color:var(--ink);transition:.15s}
.x:hover{border-color:var(--blue);color:var(--blue)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;cursor:pointer;
  font:500 13px var(--sans);padding:10px 16px;border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--ink);transition:.15s}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn.solid{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.solid:hover{background:var(--blue-700);border-color:var(--blue-700);color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.wide{width:100%;padding:14px;font-size:14px;margin:16px 0 10px}

main{max-width:1220px;margin:0 auto;padding:28px 26px 64px;display:flex;flex-direction:column;gap:24px}

/* ---- the slant, everywhere ---- */
.slant{position:relative;overflow:hidden}
.slant:before{content:"";position:absolute;inset:-40% -10% auto auto;width:38%;height:180%;
  background:linear-gradient(180deg,var(--blue-050),rgba(255,255,255,0));transform:skewX(-18deg);pointer-events:none}

/* ---- hero ---- */
.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:34px;align-items:center;
  border:1px solid var(--line);border-radius:20px;padding:44px 40px;box-shadow:var(--shadow);
  background:rgba(255,255,255,.9);backdrop-filter:blur(6px)}
.kick{margin:0 0 14px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue)}
.hero h1{font-size:clamp(30px,4vw,50px)}
.hero h1 em{font-style:normal;color:var(--blue)}
.lede{color:var(--ink-2);max-width:58ch}
.lede b{color:var(--ink);font-weight:600}
.lede.wide{max-width:none}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.art{position:relative;min-height:330px;height:100%;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.art canvas{width:100%;height:100%;display:block;min-height:330px}

/* ---- the session badge ---- */
.session{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:999px;
  padding:8px 14px;font-family:var(--mono);font-size:12px;background:#fff}
.session .dot{width:8px;height:8px;border-radius:50%;background:var(--grey)}
.session.open .dot{background:#12B76A;box-shadow:0 0 0 4px rgba(18,183,106,.14)}
.session.shut .dot{background:var(--blue);box-shadow:0 0 0 4px rgba(27,59,232,.14)}
.session b{font-weight:600}

/* ---- strip ---- */
.strip{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:14px;overflow:hidden}
.strip div{background:rgba(255,255,255,.94);padding:15px 18px;display:flex;flex-direction:column;gap:4px}
.strip span{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.strip b{font-family:var(--mono);font-size:13px;font-weight:500}

/* ---- modules ---- */
/* the cards sit ON the ground, so they are opaque and lift slightly off it */
.mod{border:1px solid var(--line);border-radius:18px;padding:28px 26px;
  background:rgba(255,255,255,.92);backdrop-filter:blur(6px);box-shadow:var(--shadow)}
.mod > header{display:flex;align-items:baseline;gap:12px;margin-bottom:20px}
.idx{font-family:var(--mono);font-size:11px;color:var(--blue);background:var(--blue-050);padding:3px 8px;border-radius:6px}
.mod h2{font-size:clamp(19px,2.2vw,26px)}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px;align-items:start}
.prose p{margin:0 0 14px;color:var(--ink-2)}
.prose b{color:var(--ink);font-weight:600}
code{font-family:var(--mono);font-size:12.5px;background:var(--blue-050);color:var(--blue-700);padding:1px 5px;border-radius:5px}
.code{margin:0 0 16px;padding:13px 15px;border:1px solid var(--line);border-radius:10px;background:var(--grey-100);
  font-family:var(--mono);font-size:12.5px;overflow-x:auto;white-space:pre;line-height:1.55;color:var(--ink)}
.note{border-left:3px solid var(--blue);padding-left:14px;font-size:13.5px;color:var(--muted)}
.kv{margin:0;display:flex;flex-direction:column}
.kv div{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-top:1px solid var(--line)}
.kv dt{color:var(--muted);font-size:12.5px}
.kv dd{margin:0;font-family:var(--mono);font-size:13px;text-align:right;word-break:break-all}
.kv dd.big{font-size:15px;font-weight:500;color:var(--blue)}

/* ---- panels ---- */
.panel{border:1px solid var(--line);border-radius:14px;padding:20px;background:rgba(255,255,255,.86)}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.big{margin:0 0 6px;font-family:var(--mono);font-size:clamp(26px,3.6vw,40px);letter-spacing:-.02em}
.big.blue{color:var(--blue)}
.fine{margin:10px 0 0;font-size:11.5px;color:var(--muted);line-height:1.6}
.fine.ok{color:#0a7c4a}
.fine.bad{color:#C0362C}
.fine a{color:var(--blue)}
#curve{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:10px;background:#fff}

/* ---- table ---- */
.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th{text-align:left;font-weight:500;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding:0 0 9px}
.tbl td{padding:9px 0;border-top:1px solid var(--line);color:var(--ink-2);font-family:var(--mono);font-size:12.5px}
.tbl td:first-child{color:var(--ink)}
.tbl td:last-child,.tbl th:last-child{text-align:right}

/* ---- terminal ---- */
.toggle{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;background:var(--grey-100);
  border-radius:10px;padding:4px;margin-bottom:18px}
.toggle button{border:0;background:none;padding:9px;border-radius:7px;cursor:pointer;font:500 13px var(--sans);color:var(--muted)}
.toggle button.on{background:#fff;color:var(--blue);box-shadow:0 1px 2px rgba(11,16,32,.08)}
label{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--muted)}
.input{display:flex;align-items:center;gap:8px;margin:8px 0 14px;border:1px solid var(--line);border-radius:11px;
  padding:11px 14px;background:var(--grey-100)}
.input input{border:0;background:none;outline:none;font-family:var(--mono);font-size:19px;width:100%;color:var(--ink)}
.input .max{border:1px solid var(--line);background:#fff;border-radius:8px;padding:5px 9px;cursor:pointer;
  font:500 11px var(--mono);color:var(--blue)}
.out{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:14px 16px;background:var(--blue-050);
  border-radius:11px;margin-bottom:16px}
.out span{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--muted)}
.out b{font-family:var(--mono);font-size:17px;font-weight:500;text-align:right;word-break:break-all}
select{font:400 12px var(--mono);border:1px solid var(--line);border-radius:7px;padding:3px 5px;background:#fff;margin-left:6px}

/* ---- docs ---- */
.doc{display:grid;grid-template-columns:210px minmax(0,1fr);gap:30px;align-items:start}
.toc{position:sticky;top:80px;display:flex;flex-direction:column;gap:2px}
.toc a{text-decoration:none;color:var(--muted);font-size:11.5px;padding:7px 10px;border-left:2px solid var(--line);font-family:var(--mono)}
.toc a:hover{color:var(--blue);border-left-color:var(--blue);background:var(--blue-050)}
.doc-body h3{margin:26px 0 12px;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);
  border-bottom:1px solid var(--line);padding-bottom:9px;scroll-margin-top:90px}
.doc-body h3:first-child{margin-top:0}
.doc-body p{margin:0 0 13px;color:var(--ink-2)}
.list{margin:0 0 14px;padding-left:18px;color:var(--ink-2)}
.list li{margin-bottom:7px}

/* ---- addresses ---- */
.addr .row{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-top:1px solid var(--line);align-items:center}
.addr .row:first-child{border-top:0}
.addr span{color:var(--muted);font-size:12.5px}
.addr b{font-family:var(--mono);font-size:12px;font-weight:400;word-break:break-all;text-align:right}
.addr a{color:var(--blue);text-decoration:none}
.foot{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:11.5px;border-top:1px solid var(--line);padding-top:18px}
.foot a{margin-left:auto;color:var(--blue);text-decoration:none}

@media (max-width:1000px){
  .hero{grid-template-columns:minmax(0,1fr);padding:30px 22px}
  .art{min-height:260px;order:-1}
  .art canvas{min-height:260px}
  .two,.doc{grid-template-columns:minmax(0,1fr)}
  .strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .toc{position:static;flex-direction:row;flex-wrap:wrap}
  .toc a{border-left:0;border-bottom:2px solid var(--line)}
}
@media (max-width:620px){
  main{padding:18px 14px 44px;gap:18px}
  .bar{padding:12px 14px}
  .nav{width:100%;margin-left:0;order:3;justify-content:space-between}
  .nav a{padding:7px 7px;font-size:11.5px}
  .strip{grid-template-columns:minmax(0,1fr)}
  .mod{padding:20px 16px}
  .code{font-size:11px}
}