body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:var(--step-0);
  line-height:1.65;
}

::selection{background:var(--accent);color:var(--paper)}

.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:var(--gutter);top:-4rem;z-index:100;
  background:var(--ink);color:var(--paper);
  padding:.6rem 1.1rem;font-family:var(--mono);font-size:var(--step--1);
  transition:top .2s ease;
}
.skip-link:focus{top:.6rem}

/* ---------- typographic primitives ---------- */
h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.08;letter-spacing:-.015em}
h1{font-size:var(--step-4);letter-spacing:-.025em}
h2{font-size:var(--step-2)}
h3{font-size:var(--step-1)}

/* mono is reserved for labels, data and system notation - small but readable */
.mono{
  font-family:var(--mono);
  font-size:var(--step--1);
  letter-spacing:.04em;
  color:var(--ink-faint);
}
.mono--caps{text-transform:uppercase;letter-spacing:.09em}
.mono--accent{color:var(--accent)}

.eyebrow{
  font-family:var(--mono);font-size:var(--step--1);letter-spacing:.1em;
  text-transform:uppercase;color:var(--accent);
  display:flex;align-items:center;gap:.7rem;
}
.eyebrow::before{content:"";width:1.6rem;height:1px;background:var(--accent)}

.lede{
  font-family:var(--serif);
  font-size:var(--step-1);
  line-height:1.45;
  color:var(--ink-soft);
  max-width:var(--measure);
}

/* long-form reading */
.prose{max-width:var(--measure);color:var(--ink-soft)}
.prose p+p{margin-top:1.25em}
.prose h2{color:var(--ink);margin:2.4em 0 .7em}
.prose h3{color:var(--ink);margin:1.9em 0 .5em}
.prose ul,.prose ol{margin:1.1em 0 1.1em 1.4em}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--ink)}
.prose blockquote{
  margin:2em 0;
  padding-left:1.3em;
  border-left:2px solid var(--accent);
  font-family:var(--serif);
  font-size:var(--step-1);
  line-height:1.5;
  color:var(--ink);
}
.prose a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--accent)}

/* ---------- layout primitives ---------- */
.wrap{max-width:var(--wide);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--section)}
.section + .section{border-top:1px solid var(--rule)}

.section-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  border-bottom:1px solid var(--ink);
  padding-bottom:.9rem;margin-bottom:clamp(2.2rem,5vw,3.8rem);
}
.section-head h2{border:none}
.section-head .mono{flex-shrink:0}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--paper) 92%,transparent);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--rule);
}
.site-header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  padding-block:.95rem;gap:1rem;
}
.brand{font-family:var(--mono);font-size:.88rem;letter-spacing:.1em;display:inline-flex;align-items:center;gap:.5rem}
.brand img,.brand svg{width:1.15rem;height:1.15rem}
.site-nav ul{display:flex;gap:clamp(1.1rem,3vw,2.4rem);list-style:none;align-items:center}
.site-nav a{
  font-family:var(--mono);font-size:var(--step--1);letter-spacing:.06em;
  color:var(--ink-soft);padding:.45rem 0;position:relative;display:inline-block;
}
.site-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--accent);transition:width .25s ease;
}
.site-nav a:hover::after,.site-nav a[aria-current="page"]::after{width:100%}
.site-nav a[aria-current="page"]{color:var(--ink)}
.nav-cta{border:1px solid var(--ink);padding:.45rem .9rem!important}
.nav-cta::after{display:none}
.nav-cta:hover{border-color:var(--accent);color:var(--accent)}
.nav-toggle{display:none;min-height:44px;min-width:44px}

@media (max-width:44rem){
  .nav-toggle{
    display:inline-block;font-family:var(--mono);font-size:var(--step--1);
    letter-spacing:.08em;color:var(--ink);
    padding:.4rem 0;
  }
  .site-nav{
    display:none;position:absolute;inset:100% 0 auto 0;
    background:var(--paper);border-bottom:1px solid var(--ink);
    padding:1.2rem var(--gutter) 1.6rem;
  }
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:.4rem;align-items:flex-start}
  .site-nav a{font-size:1rem;padding:.5rem 0;min-height:44px;display:inline-flex;align-items:center}
}

/* ---------- language switcher (only permitted visual addition) ---------- */
.lang-item{flex-shrink:0}
.lang-switch{position:relative}
.lang-switch__btn{
  font-family:var(--mono);font-size:var(--step--1);letter-spacing:.06em;
  color:var(--ink-soft);padding:.45rem 0;min-height:44px;min-width:44px;
  display:inline-flex;align-items:center;justify-content:center;
}
.lang-switch__btn[aria-expanded="true"]{color:var(--ink)}
.lang-switch__menu{list-style:none}
.lang-switch__menu a[aria-current="true"]{color:var(--ink)}
html:not(.js) .lang-switch__btn{display:none}
html:not(.js) .lang-switch__menu{display:flex;gap:.8rem;align-items:center}
.js .lang-switch__menu{
  display:none;position:absolute;right:0;top:calc(100% + .35rem);
  background:var(--paper);border:1px solid var(--ink);z-index:60;
  padding:.45rem .95rem .55rem;min-width:7.5rem;
}
.js .lang-switch.is-open .lang-switch__menu{display:block}
.js .lang-switch__menu a{display:flex;align-items:center;min-height:44px;padding:.35rem 0}
.js .lang-switch__menu a::after{display:none}
@media (max-width:44rem){
  html:not(.js) .lang-switch__menu{flex-direction:column;align-items:flex-start;gap:.4rem}
  .js .lang-switch__menu{
    position:static;right:auto;top:auto;
    border:none;border-top:1px solid var(--rule);
    padding:.35rem 0 0;margin-top:.35rem;min-width:0;
  }
}

/* ---------- breadcrumbs ---------- */
.crumbs{margin-bottom:2.6rem}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.55rem}
.crumbs li{display:flex;gap:.55rem;align-items:center}
.crumbs li+li::before{content:"→";color:var(--ink-faint);font-size:.75em}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--accent)}
.crumbs [aria-current]{color:var(--ink)}

/* ---------- footer ---------- */
.site-footer{border-top:2px solid var(--ink);margin-top:var(--section)}
.site-footer .wrap{
  display:grid;grid-template-columns:1fr;gap:2.2rem;
  padding-block:3.2rem;
}
@media(min-width:48rem){.site-footer .wrap{grid-template-columns:2fr 1fr 1fr}}
.site-footer a{color:var(--ink-soft)}
.site-footer a:hover{color:var(--accent)}
.footer-nav{list-style:none;display:grid;gap:.45rem;margin-top:.7rem}
.footer-note{color:var(--ink-faint);font-size:var(--step--1);max-width:36ch;margin-top:.8rem}

/* ---------- links & focus ---------- */
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;
}
.text-link{
  color:var(--ink);font-family:var(--mono);font-size:var(--step--1);
  letter-spacing:.05em;
  border-bottom:1px solid var(--accent);padding-bottom:2px;
  transition:color .2s ease;
}
.text-link:hover{color:var(--accent)}

/* ---------- prev / next navigation ---------- */
.pagenav{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--rule);border:1px solid var(--rule);margin-top:3.5rem;
}
.pagenav a{
  background:var(--paper);padding:1.4rem 1.6rem;display:grid;gap:.3rem;
  transition:background .2s ease;
}
.pagenav a:hover{background:var(--accent-soft)}
.pagenav .dir{font-family:var(--mono);font-size:var(--step--1);color:var(--ink-faint)}
.pagenav .name{font-family:var(--serif);font-size:var(--step-1);line-height:1.2}
.pagenav a.next{text-align:right;justify-items:end}
@media (max-width:34rem){
  .pagenav{grid-template-columns:1fr}
  .pagenav a.next{text-align:left;justify-items:start}
}

/* ---------- page entry animation (progressive enhancement only) ---------- */
.js .rise{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.js .rise.is-in{opacity:1;transform:none}
.js .hero .rise{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .rise{opacity:1;transform:none;transition:none}}

/* ---------- print: every block exactly once, final state ---------- */
@media print{
  .js .rise{opacity:1;transform:none}
  .site-header,.site-footer,.pagenav,.nav-toggle,.skip-link{display:none}
  body{background:#fff}
  .section{padding-block:1.5rem}
  a{color:var(--ink)}
}