@import url('https://fonts.googleapis.com/css2?family=Libre+Bodoni:wght@400;500;600;700&family=Public+Sans:wght@300;400;500;600;700&display=swap');

*,*::before,*::after{box-sizing:border-box}

:root{
  --ink:#000000;
  --paper:#ffffff;
  --d:'Libre Bodoni',Georgia,'Times New Roman',serif;
  --t:'Public Sans',Helvetica,Arial,sans-serif;
  --u:8px;
  --page:clamp(16px,4.5vw,44px);
  --maxw:1280px;
}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  overflow-x:hidden;
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--t);
  font-size:17px;
  font-weight:400;
  line-height:1.7;
  letter-spacing:.004em;
  padding-bottom:calc(74px + env(safe-area-inset-bottom));
  overflow-x:hidden;
}

@media (min-width:900px){
  body{font-size:18px;line-height:1.72}
}

img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{font-weight:500;margin:0}
ol,ul{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

.skip{
  position:absolute;left:-9999px;top:0;z-index:90;
  background:var(--ink);color:var(--paper);
  padding:10px 16px;font-size:16px;text-decoration:none;
}
.skip:focus{left:8px;top:8px}

/* ---------- hero ---------- */
.hero{
  min-height:70vh;
  display:grid;
  place-items:center;
  text-align:center;
  padding:clamp(40px,10vh,96px) var(--page) clamp(48px,9vh,88px);
  border-bottom:1px solid var(--ink);
  background:
    linear-gradient(to right,rgba(0,0,0,.075) 1px,transparent 1px) 0 0/12.5% 100%,
    var(--paper);
}

.hero-inner{max-width:20ch;margin:0 auto}
.hero-mark{
  width:44px;height:44px;
  margin:0 auto clamp(18px,3.5vh,30px);
  display:block;
  will-change:transform;
}
.hero-title{
  font-family:var(--d);
  font-weight:500;
  font-size:clamp(2rem,7.4vw,4.6rem);
  line-height:1.03;
  letter-spacing:-.018em;
  margin:0;
  text-wrap:balance;
}

/* ---------- layout ---------- */
.mn{padding:0}

.doc{max-width:var(--maxw);margin:0 auto}

.lay{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  padding:0 var(--page) clamp(56px,10vh,96px);
}

@media (min-width:940px){
  .lay{
    grid-template-columns:232px minmax(0,1fr);
    gap:clamp(32px,5vw,72px);
    align-items:start;
    padding-top:clamp(40px,7vh,72px);
  }
}

/* ---------- aside ---------- */
.side{
  border-bottom:1px solid var(--ink);
  padding:calc(var(--u) * 3) 0;
}

@media (min-width:940px){
  .side{
    border-bottom:0;
    border-left:1px solid var(--ink);
    padding:calc(var(--u) * 1) 0 calc(var(--u) * 1) calc(var(--u) * 2.5);
    position:sticky;
    top:calc(var(--u) * 4);
  }
}

.side-h{
  font-family:var(--t);
  font-size:13px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  margin:0 0 calc(var(--u) * 2);
}
.side-h > span{display:inline-block}

.side-list{display:flex;flex-direction:column;gap:2px}

.side-list a{
  display:flex;
  align-items:baseline;
  gap:10px;
  min-height:40px;
  padding:6px 2px;
  text-decoration:none;
  font-size:16px;
  line-height:1.35;
  border-bottom:1px solid rgba(0,0,0,.14);
  transition:background .18s ease,color .18s ease,padding-left .18s ease;
}
.side-list a:hover,
.side-list a:focus-visible{background:var(--ink);color:var(--paper);padding-left:8px}

.side-n{
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  opacity:.6;
  flex:0 0 auto;
}
.side-t{flex:1 1 auto}

/* ---------- body content ---------- */
.doc-body{
  padding:calc(var(--u) * 4) 0 0;
  max-width:74ch;
  min-width:0;
}

@media (min-width:940px){
  .doc-body{padding-top:0}
}

.doc-body article{
  border:1px solid var(--ink);
  border-radius:28px;
  padding:clamp(22px,3.4vw,40px);
  margin:0 0 clamp(20px,3vw,32px);
  scroll-margin-top:24px;
  background:var(--paper);
}

.doc-body h2{
  font-family:var(--d);
  font-size:clamp(1.5rem,3.1vw,2.15rem);
  line-height:1.12;
  letter-spacing:-.012em;
  margin:0 0 calc(var(--u) * 2);
}
.doc-body h2 > span{display:inline-block;border-bottom:2px solid var(--ink);padding-bottom:6px}

.doc-body h3{
  font-family:var(--t);
  font-size:1.06rem;
  font-weight:600;
  letter-spacing:.01em;
  margin:calc(var(--u) * 3) 0 calc(var(--u) * 1.25);
}
.doc-body h3 > span{display:inline}

.doc-body p{margin:0 0 1em}
.doc-body ul,.doc-body ol{list-style:none;margin:0 0 1em;padding:0}
.doc-body li{padding-left:1.15em;position:relative;margin:0 0 .55em}
.doc-body li::before{content:"";position:absolute;left:0;top:.7em;width:7px;height:1px;background:var(--ink)}
.doc-body li > strong{font-weight:600}

.doc-body a{
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.doc-body a:hover{background:var(--ink);color:var(--paper);text-decoration:none}

.doc-body blockquote{
  margin:calc(var(--u) * 2) 0;
  padding:calc(var(--u) * 2) calc(var(--u) * 2.5);
  border-left:3px solid var(--ink);
  font-family:var(--d);
  font-size:1.08rem;
  line-height:1.55;
}
.doc-body blockquote p:last-child{margin-bottom:0}

.doc-body hr{border:0;border-top:1px solid var(--ink);margin:calc(var(--u) * 3) 0}

.doc-body img,
.doc-body figure img{
  border-radius:20px;
  border:1px solid var(--ink);
  margin:calc(var(--u) * 2) 0;
}
.doc-body figure{margin:calc(var(--u) * 2) 0}
.doc-body figcaption{font-size:14px;line-height:1.55;opacity:.72;margin-top:8px}

.doc-body table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
  margin:calc(var(--u) * 2) 0;
}
.doc-body th,.doc-body td{border-bottom:1px solid rgba(0,0,0,.24);padding:10px 8px;text-align:left;vertical-align:top}
.doc-body th{font-weight:600;border-bottom:1px solid var(--ink)}

.doc-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.92em;
  border:1px solid rgba(0,0,0,.28);
  border-radius:4px;
  padding:1px 4px;
}

.doc-body .rv{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease}
.doc-body .rv.is-in{opacity:1;transform:none}

/* ---------- footer ---------- */
.ft{
  background:var(--ink);
  color:var(--paper);
  padding:clamp(40px,7vh,72px) var(--page) calc(var(--u) * 5);
  border-top:1px solid var(--ink);
}

.ft-grid{
  max-width:var(--maxw);
  margin:0 auto;
  display:grid;
  grid-template-columns:1fr;
  gap:calc(var(--u) * 4);
}

@media (min-width:760px){
  .ft-grid{grid-template-columns:repeat(4,1fr);gap:calc(var(--u) * 3)}
}

.ft article{border-top:1px solid rgba(255,255,255,.4);padding-top:calc(var(--u) * 1.5)}

.ft-brand{
  font-family:var(--d);
  font-size:clamp(1.9rem,4.6vw,2.9rem);
  line-height:.96;
  letter-spacing:-.015em;
  margin:0;
  text-wrap:balance;
}

.ft-h{
  font-family:var(--t);
  font-size:13px;
  font-weight:600;
  letter-spacing:.22em;
  margin:0 0 calc(var(--u) * 2);
}
.ft-h > span{display:inline-block}

.ft-list{display:flex;flex-direction:column;gap:1px}
.ft-list a,
.ft-top a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:4px 0;
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
  border-bottom:1px solid rgba(255,255,255,.24);
  width:100%;
  transition:padding-left .18s ease;
}
.ft-list a:hover,
.ft-top a:hover{padding-left:6px;border-bottom-color:var(--paper)}

.ft-host{font-size:16px;line-height:1.5;margin:calc(var(--u) * .5) 0 calc(var(--u) * 2);word-break:break-word}
.ft-top{margin:0}

.ft-base{
  max-width:var(--maxw);
  margin:calc(var(--u) * 5) auto 0;
  padding-top:calc(var(--u) * 2);
  border-top:1px solid rgba(255,255,255,.4);
  font-size:16px;
  line-height:1.5;
}

/* ---------- bottom nav ---------- */
.nv{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  gap:calc(var(--u));
  padding:calc(var(--u) * .75) calc(var(--u) * 1.5) calc(var(--u) * .75 + env(safe-area-inset-bottom));
  background:var(--paper);
  border-top:1px solid var(--ink);
}

.nv-brand{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:7px;
  min-height:44px;
  padding:4px 4px;
  text-decoration:none;
}
.nv-logo{width:26px;height:26px;object-fit:contain;border-radius:50%}
.nv-brandt{
  font-family:var(--d);
  font-size:17px;
  letter-spacing:.01em;
  white-space:nowrap;
  line-height:1;
}

.nv-list{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  align-items:center;
  gap:2px;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
  scroll-snap-type:x proximity;
}
.nv-list::-webkit-scrollbar{display:none}

.nv-list li{scroll-snap-align:center}

.nv-a{
  display:flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  padding:6px 9px;
  border-radius:22px;
  font-size:16px;
  line-height:1.2;
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.nv-a:hover,
.nv-a[aria-current="true"]{background:var(--ink);color:var(--paper)}

.nv-ico{flex:0 0 auto;opacity:.65}
.nv-n{font-size:12px;font-weight:600;letter-spacing:.08em;opacity:.62}

.nv-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:6px 16px;
  border-radius:22px;
  background:var(--ink);
  color:var(--paper);
  font-size:16px;
  font-weight:500;
  text-decoration:none;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease;
}
.nv-cta:hover{background:var(--paper);color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}

@media (min-width:940px){
  .nv{padding-left:var(--page);padding-right:var(--page);gap:calc(var(--u) * 2)}
  .nv-brandt{font-size:19px}
  .nv-list{gap:4px}
  .nv-a{padding:6px 12px}
  .nv-cta{padding:6px 22px}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .hero-mark{transform:none !important}
  .doc-body .rv{opacity:1;transform:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}