:root{
  --paper:#f3f0e8;--card:#ffffff;--ink:#0c0c0c;--mute:#6b675f;--acid:#c8ff2e;--warn:#ff5a1f;
  --sans:"Geist",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Geist Mono",ui-monospace,Menlo,monospace;
  --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --bd:2px solid var(--ink);
  --pad:clamp(16px,5vw,48px);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;color:var(--ink);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden;padding-top:env(safe-area-inset-top,0px);
  background-color:var(--paper);
  background-image:linear-gradient(rgba(12,12,12,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(12,12,12,.045) 1px,transparent 1px);
  background-size:44px 44px}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}
.wrap{max-width:1160px;margin:0 auto;padding-inline:var(--pad)}
.it{font-family:var(--serif);font-style:italic;font-weight:400}

header{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:rgba(243,240,232,.9);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:var(--bd)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.03em}
.logo-mark{width:34px;height:34px;display:block;flex:none;transition:transform .25s}
.logo:hover .logo-mark{transform:rotate(-8deg)}
.logo .it{font-size:1.12em;margin-left:1px;letter-spacing:-.01em}
.nav-links{display:flex;gap:26px;font-weight:500;font-size:15px}
.nav-links a.on{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}
.btn{display:inline-flex;align-items:center;border-radius:999px;padding:8px 18px;font:600 14px var(--sans);background:var(--acid);border:var(--bd);box-shadow:3px 3px 0 var(--ink);white-space:nowrap;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}

.layout{display:grid;grid-template-columns:200px minmax(0,1fr);gap:clamp(32px,5vw,72px);padding-block:clamp(40px,6vw,72px)}
.side{position:sticky;top:96px;align-self:start;display:flex;flex-direction:column;gap:4px}
.side a{padding:7px 12px;border-radius:10px;font-size:14px;font-weight:500;color:var(--mute);border:2px solid transparent}
.side a:hover{color:var(--ink)}
.side a.on{color:var(--ink);background:var(--acid);border-color:var(--ink)}

.doc{max-width:760px;min-width:0}
.doc h1{font-size:clamp(44px,6vw,72px);line-height:1;letter-spacing:-.05em;font-weight:700;margin:0 0 16px}
.doc h1 .it{font-size:1.1em}
.doc .lede{font-size:19px;color:var(--mute);margin:0 0 8px;max-width:46ch}
.doc .date{font:500 13px var(--mono);color:var(--mute);margin:0}
.doc section{padding-top:60px}
.doc h2{font-size:clamp(26px,3.2vw,34px);letter-spacing:-.04em;font-weight:700;margin:0 0 14px;line-height:1.15}
.doc h3{font-size:17px;font-weight:600;margin:26px 0 8px}
.doc p{margin:0 0 14px}
.doc ul{margin:0 0 14px;padding-left:20px}
.doc li{margin-bottom:6px}
.doc strong{font-weight:600}
.doc code{font:500 .86em var(--mono);background:#fff;border:1.5px solid var(--ink);padding:1px 6px;border-radius:6px}
.doc a.inl{text-decoration:underline;text-decoration-thickness:2px;text-decoration-color:var(--acid);text-underline-offset:3px}
.doc a.inl:hover{background:var(--acid)}

.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0}
.card{border:var(--bd);background:var(--card);border-radius:16px;padding:20px;box-shadow:4px 4px 0 var(--ink)}
.card:nth-child(2){background:var(--acid)}
.card .n{font:600 13px var(--mono)}
.card b{display:block;font-size:18px;margin:6px 0 4px;letter-spacing:-.03em}
.card span{color:var(--mute);font-size:14px;line-height:1.5;display:block}
.card:nth-child(2) span{color:#3d4a12}

.tl{list-style:none;padding:0!important;margin:22px 0;position:relative}
.tl::before{content:"";position:absolute;left:16px;top:10px;bottom:10px;width:2px;background:repeating-linear-gradient(180deg,var(--ink) 0 6px,transparent 6px 11px)}
.tl li{position:relative;padding:4px 0 16px 50px;margin:0}
.tl li::before{content:counter(list-item);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;background:#fff;border:var(--bd);display:grid;place-items:center;font:600 12px var(--mono)}
.who{display:inline-block;font:600 12px var(--mono);padding:2px 8px;border-radius:6px;background:#fff;border:1.5px solid var(--ink);margin-right:8px}
.who.k{background:var(--ink);color:var(--acid)}
.who.o{background:var(--acid)}

.tbl{overflow-x:auto;border:var(--bd);border-radius:16px;margin:18px 0 22px;background:#fff;box-shadow:4px 4px 0 var(--ink)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:480px}
th,td{text-align:left;padding:12px 16px;border-bottom:1.5px solid rgba(12,12,12,.12);vertical-align:top}
th{font-weight:600;background:var(--paper);border-bottom:var(--bd)}
tr:last-child td{border-bottom:0}

pre{margin:18px 0 22px;padding:18px 20px;border-radius:16px;background:var(--ink);color:#e9e6dc;border:var(--bd);box-shadow:4px 4px 0 var(--acid),4px 4px 0 2px var(--ink);overflow-x:auto;font:500 13px/1.8 var(--mono)}
pre .k{color:var(--acid)}

.note{display:flex;gap:12px;padding:16px 18px;border-radius:16px;border:var(--bd);background:#fff4ec;margin:18px 0;font-size:15px}
.note svg{flex:none;margin-top:3px}

footer{border-top:var(--bd);padding-block:36px calc(36px + env(safe-area-inset-bottom,0px));margin-top:40px}
.foot{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center;color:var(--mute);font-size:14px}
.foot nav{display:flex;flex-wrap:wrap;gap:20px;color:var(--ink);font-weight:500}
.foot nav a:hover{text-decoration:underline;text-underline-offset:4px}

@media (max-width:860px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .side{position:sticky;top:calc(64px + env(safe-area-inset-top,0px));z-index:10;flex-direction:row;overflow-x:auto;gap:6px;margin-inline:calc(var(--pad) * -1);padding:10px var(--pad);background:rgba(243,240,232,.95);border-bottom:var(--bd);scrollbar-width:none}
  .side::-webkit-scrollbar{display:none}
  .side a{white-space:nowrap;border:1.5px solid var(--ink);border-radius:999px;padding:5px 14px;color:var(--ink);background:#fff}
  .cards{grid-template-columns:minmax(0,1fr)}
}

/* groups, crumbs, contact, x */
.side .g{font:600 11px var(--mono);letter-spacing:.08em;color:var(--mute);padding:16px 12px 4px;text-transform:uppercase}
.side .g:first-child{padding-top:0}
.doc .crumb{font:600 13px var(--mono);color:var(--mute);margin:0 0 10px}
.foot .x{display:inline-flex;align-items:center;gap:6px}
.contact{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0}
.contact a{display:inline-flex;align-items:center;gap:8px;border:var(--bd);border-radius:999px;padding:8px 16px;background:#fff;font-weight:600;font-size:14px;box-shadow:3px 3px 0 var(--ink);transition:transform .15s,box-shadow .15s}
.contact a:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}
@media (max-width:860px){.side .g{display:none}}

/* mobile menu */
.menu-btn{display:none;width:42px;height:42px;flex:none;border:2px solid var(--ink);border-radius:12px;background:#fff;box-shadow:3px 3px 0 var(--ink);cursor:pointer;padding:0;place-content:center;gap:6px}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s}
.menu-open .menu-btn span:first-child{transform:translateY(4px) rotate(45deg)}
.menu-open .menu-btn span:last-child{transform:translateY(-4px) rotate(-45deg)}
@media (max-width:900px){
  .menu-btn{display:grid}
  header .nav > .btn{margin-left:auto}
  header .nav-links{display:flex;flex-direction:column;gap:0;position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:2px solid var(--ink);padding:8px var(--pad) 20px;box-shadow:0 14px 30px -18px rgba(12,12,12,.35);transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,transform .2s,visibility .2s}
  .menu-open header .nav-links{transform:none;opacity:1;visibility:visible;pointer-events:auto}
  header .nav-links a{font-size:22px;font-weight:700;letter-spacing:-.03em;padding:14px 0;border-bottom:1.5px solid rgba(12,12,12,.12)}
  header .nav-links a:last-child{border-bottom:0}
  header .nav-links a::after{display:none}
  header .nav-links a.on{text-decoration:none;color:var(--ink)}
  header .nav-links a.on::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--acid);border:1.5px solid var(--ink);margin-right:10px;vertical-align:middle}
}
@media (max-width:420px){
  header .nav > .btn{padding:8px 12px;font-size:13px}
  .logo{font-size:16px}
  .logo-mark{width:30px;height:30px}
}