/* ══ ARTICLE ══════════════════════════════════════════════════════════════ */
.zr-art{ padding:clamp(28px,3vw,44px) 0 0; }
.zr-art__crumbs{
  display:flex; align-items:center; gap:8px; margin-bottom:18px;
  font-size:13px; color:var(--bl-dim);
}
.zr-art__crumbs a{ color:var(--bl-dim); text-decoration:none; }
.zr-art__crumbs a:hover{ color:var(--zr-blue); }
.zr-art__h1{
  margin:0 0 14px; max-width:900px; text-wrap:balance;
  font-size:clamp(30px, 3.5vw, 42px); font-weight:500; line-height:1.2;
  letter-spacing:-.028em; color:var(--bl-ink);
}
.zr-art__deck{ margin:0 0 22px; max-width:760px; font-size:17px; line-height:28px; color:var(--bl-body); text-wrap:pretty; }
.zr-art__byline{
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
  padding-bottom:22px; border-bottom:1px solid var(--bl-rule);
}
.zr-art__byline .zr-meta{ width:auto; flex:1 1 auto; }
.zr-art__who{ display:flex; flex-direction:column; }
.zr-art__who b{ font-size:13.5px; font-weight:500; line-height:20px; color:var(--bl-ink); }
.zr-art__who s{ text-decoration:none; font-size:12.5px; color:var(--bl-dim); }
.zr-art__share{ display:flex; align-items:center; gap:6px; }
.zr-art__share button{
  display:grid; place-items:center; width:32px; height:32px;
  border:1px solid var(--bl-hair); border-radius:9px; background:#fff;
  color:var(--bl-dim); cursor:pointer;
  transition:border-color .16s var(--zr-ease-out-quad), color .16s var(--zr-ease-out-quad);
}
.zr-art__share button:hover{ border-color:#C9D6F2; color:var(--zr-blue); }
/* The copy button reuses the MCP pill's two glyphs, but NOT its CSS: a bare
   `.zr-art__share svg{display:block}` outranks the inherited
   `.zr-menu__tick{display:none}` on specificity and showed both at once.
   The swap is stated here instead, scoped to this button. */
.zr-art__share svg{ width:15px; height:15px; }
.zr-art__share button > svg{ display:block; }
.zr-art__share button > .zr-menu__tick{ display:none; }
.zr-art__share button.is-copied{ border-color:#BFE5CD; color:#0F9D58; }
.zr-art__share button.is-copied > .zr-menu__copy{ display:none; }
.zr-art__share button.is-copied > .zr-menu__tick{ display:block; color:#0F9D58; }

/* two columns: a sticky rail and the measure */
.zr-art__grid{
  display:grid; grid-template-columns:240px minmax(0, 720px);
  gap:56px; justify-content:center;
  padding-block:32px clamp(40px,4vw,64px);
}
.zr-art__rail{ position:sticky; top:104px; align-self:start; display:flex; flex-direction:column; gap:20px; }
.zr-toc__label{
  margin:0 0 10px; font-family:'Geist Mono', ui-monospace, monospace;
  font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:#A5A5A5;
}
.zr-toc ol{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; }
.zr-toc a{
  display:block; padding:6px 0 6px 13px;
  border-left:2px solid var(--bl-rule);
  font-size:13px; line-height:19px; color:var(--bl-dim); text-decoration:none;
  transition:color .16s var(--zr-ease-out-quad), border-color .16s var(--zr-ease-out-quad);
}
.zr-toc a:hover{ color:var(--bl-ink); }
.zr-toc a.is-here{ border-color:var(--zr-blue); color:var(--zr-blue); }

.zr-rail-cta{
  display:flex; flex-direction:column; gap:8px; padding:18px;
  background:#FBFCFE; border:1px solid var(--bl-hair); border-radius:14px;
}
.zr-rail-cta b{ font-size:15px; font-weight:500; line-height:22px; color:var(--bl-ink); }
.zr-rail-cta s{ text-decoration:none; font-size:13px; line-height:19px; color:var(--bl-dim); }
.zr-rail-cta a{
  display:flex; align-items:center; justify-content:center; height:40px; margin-top:4px;
  border-radius:10px; background:var(--zr-blue); color:#fff;
  font-size:14px; font-weight:500; text-decoration:none;
  box-shadow:inset 0 3px 14px rgba(255,255,255,.35);
  transition:background .16s linear;
}
.zr-rail-cta a:hover{ background:#0D55DD; }

/* ── the prose ─────────────────────────────────────────────────────────── */
.zr-prose{ font-size:16px; line-height:27px; color:#333740; }
.zr-prose > * + *{ margin-top:22px; }
.zr-prose p{ margin:0; text-wrap:pretty; }
.zr-prose h2{
  margin:40px 0 0; font-size:clamp(22px,2vw,28px); font-weight:500; line-height:1.28;
  letter-spacing:-.022em; color:var(--bl-ink); scroll-margin-top:120px;
}
.zr-prose h2 + p{ margin-top:14px; }
.zr-prose a{ color:var(--zr-blue); }

/* TL;DR — the block a model is meant to lift */
.zr-tldr{
  padding:20px 22px; border-radius:14px;
  background:#EEF5FF; border:1px solid #DCE8FF;
}
.zr-tldr__label{
  margin:0 0 12px; font-family:'Geist Mono', ui-monospace, monospace;
  font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--zr-blue);
}
.zr-tldr ul{ margin:0; padding:0; list-style:none; display:flex; flex-direction:column; gap:10px; }
.zr-tldr li{ position:relative; padding-left:16px; font-size:14.5px; line-height:22px; color:#2B3A55; }
.zr-tldr li::before{
  content:""; position:absolute; left:2px; top:8px;
  width:5px; height:5px; border-radius:50%; background:var(--zr-blue);
}

/* a figure: the bar table plus its caption */
.zr-fig{ margin:0; }
.zr-fig__card{ padding:18px 20px; background:#fff; border:1px solid var(--bl-hair); border-radius:12px; }
.zr-fig__top{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:14px; }
.zr-fig__top b{ font-size:14.5px; font-weight:500; color:var(--bl-ink); }
.zr-fig__n{ font-family:'Geist Mono', ui-monospace, monospace; font-size:11.5px; color:#A5A5A5; }
.zr-fig__row + .zr-fig__row{ margin-top:12px; }
.zr-fig__lab{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; font-size:13.5px; line-height:20px; color:var(--bl-body); }
.zr-fig__lab s{ text-decoration:none; font-variant-numeric:tabular-nums; color:var(--bl-ink); }
.zr-fig__bar{ height:4px; margin-top:5px; border-radius:99px; background:#EEF3FA; overflow:hidden; }
.zr-fig__bar i{ display:block; height:100%; border-radius:99px; background:var(--zr-blue); }
.zr-fig figcaption{
  margin-top:10px; font-family:'Geist Mono', ui-monospace, monospace;
  font-size:11.5px; line-height:18px; color:#A5A5A5;
}

.zr-prose blockquote{
  margin:0; padding:4px 0 4px 20px; border-left:3px solid var(--zr-blue);
  font-size:19px; line-height:30px; color:var(--bl-ink); text-wrap:pretty;
}

/* the numbered to-do list */
.zr-steps{ margin:0; padding:0; list-style:none; counter-reset:s; display:flex; flex-direction:column; gap:18px; }
.zr-steps li{ display:grid; grid-template-columns:24px minmax(0,1fr); gap:12px; counter-increment:s; }
.zr-steps li::before{
  content:counter(s);
  display:grid; place-items:center; width:24px; height:24px; margin-top:1px;
  border-radius:50%; background:#E8F1FF;
  font-family:'Geist Mono', ui-monospace, monospace; font-size:11.5px; color:#1D5FBF;
}
.zr-steps b{ display:block; font-size:15.5px; font-weight:500; line-height:23px; color:var(--bl-ink); }
.zr-steps s{ display:block; margin-top:3px; text-decoration:none; font-size:14.5px; line-height:22px; color:var(--bl-dim); }

/* the caveat */
.zr-warn{ padding:16px 18px; border-radius:12px; background:#FDF4E3; border:1px solid #F6E4C0; }
.zr-warn b{ display:block; font-size:14px; font-weight:500; line-height:21px; color:#8A5A08; }
.zr-warn p{ margin:4px 0 0; font-size:14px; line-height:21px; color:#9A6B16; }

/* questions people ask */
.zr-qa{ display:flex; flex-direction:column; gap:12px; }
.zr-qa__item{ padding:16px 18px; background:#fff; border:1px solid var(--bl-hair); border-radius:12px; }
.zr-qa__item b{ display:block; font-size:15px; font-weight:500; line-height:23px; color:var(--bl-ink); }
.zr-qa__item p{ margin:6px 0 0; font-size:14px; line-height:21px; color:var(--bl-dim); }

.zr-filed{ display:flex; align-items:center; gap:8px; flex-wrap:wrap; font-size:13px; color:var(--bl-dim); }

.zr-bio{ display:flex; gap:16px; padding:20px; background:#fff; border:1px solid var(--bl-hair); border-radius:14px; }
.zr-bio__av{ flex:0 0 auto; width:56px; height:56px; border-radius:99px; background:var(--bl-ph); border:1px solid var(--bl-hair); overflow:hidden; }
.zr-bio__av img{ width:100%; height:100%; object-fit:cover; display:block; }
.zr-bio b{ display:block; font-size:16px; font-weight:500; line-height:24px; color:var(--bl-ink); }
.zr-bio s{ display:block; text-decoration:none; font-size:13px; line-height:20px; color:var(--bl-dim); }
.zr-bio p{ margin:8px 0 0; font-size:14px; line-height:21px; color:var(--bl-body); }

/* blog.html-only rule from its CONTACT sub-block (contact.html lacks it) */
@media (max-width:620px){
  .zr-bl__head{ flex-wrap:wrap; gap:4px 16px; margin-bottom:16px; }
}