:root{
  --bg:#F5F7F7; --paper:#FFFFFF; --ink:#0D1B1E; --muted:#56676B; --line:#DCE3E4;
  --teal:#0FA8B0; --teal-ink:#0A7C83; --teal-soft:#E3F4F5; --apricot:#EE9B4E; --apricot-soft:#FCEBDC;
  --display:"Bricolage Grotesque","Avenir Next","Segoe UI",system-ui,sans-serif;
  --body:"Figtree","Helvetica Neue","Segoe UI",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --gutter:clamp(16px,4vw,48px);
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#0A1316;--paper:#111E22;--ink:#E7EFF0;--muted:#94A7AB;--line:#21343A;--teal:#27C0C8;--teal-ink:#5AD3D9;--teal-soft:#0F2F33;--apricot:#F2AA66;--apricot-soft:#33251A;color-scheme:dark}
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.7 var(--body);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--apricot);outline-offset:3px;border-radius:6px}
h1,h2,h3{font-family:var(--display);letter-spacing:-.02em;line-height:1.08;text-wrap:balance;margin:0}
.wrap{max-width:1160px;margin-inline:auto;padding-inline:var(--gutter)}
.eyebrow,.tag{font:500 11.5px/1 var(--mono);letter-spacing:.13em;text-transform:uppercase;color:var(--teal-ink)}
.meta{font:500 12.5px/1.4 var(--mono);color:var(--muted)}

/* header / footer */
.top{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px}
.brand{display:flex;align-items:center;gap:10px;font:800 21px/1 var(--display);text-decoration:none;letter-spacing:-.02em}
.brand img{border-radius:9px}
.top nav{display:flex;align-items:center;gap:22px;font-weight:600;font-size:15px}
.top nav a{text-decoration:none}
.top nav a:hover{color:var(--teal-ink)}
.top .cta{background:var(--teal);color:#fff;padding:8px 15px;border-radius:999px}
.top .cta:hover{color:#fff;background:var(--teal-ink)}
.foot{border-top:1px solid var(--line);margin-top:80px;padding-block:32px 48px;color:var(--muted);font-size:14px}
.foot .row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px 28px}
.foot nav{display:flex;flex-wrap:wrap;gap:20px}
.foot a{text-decoration:none}
.foot a:hover{color:var(--ink)}

/* blog index */
.blog-hero{padding-block:64px 36px;max-width:900px;margin-left:max(0px,calc((100vw - 1160px)/2))}
.blog-hero h1{font-size:clamp(38px,5.4vw,68px);font-weight:800;margin:14px 0 16px}
.dek{color:var(--muted);font-size:clamp(17px,1.7vw,20px);max-width:40em;margin:0}
.lead{display:grid;grid-template-columns:1.25fr 1fr;gap:0;background:var(--paper);border:1px solid var(--line);border-radius:24px;overflow:hidden;text-decoration:none;margin-bottom:28px}
.lead img{width:100%;height:100%;min-height:300px;object-fit:cover}
.lead div{padding:clamp(24px,4vw,44px);display:flex;flex-direction:column;justify-content:center;gap:12px}
.lead h2{font-size:clamp(26px,3vw,38px);font-weight:800}
.lead p{margin:0;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:20px;overflow:hidden;text-decoration:none;transition:transform .2s ease,box-shadow .2s ease}
.card:hover,.lead:hover{transform:translateY(-3px);box-shadow:0 22px 40px -28px rgba(9,40,45,.5)}
.lead{transition:transform .2s ease,box-shadow .2s ease}
.card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.card div{padding:20px 22px 22px;display:flex;flex-direction:column;gap:9px;flex:1}
.card h3{font-size:21px;font-weight:700}
.card p{margin:0;color:var(--muted);font-size:15px;line-height:1.55;flex:1}

/* post */
.post-head{padding-block:48px 28px;max-width:900px}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:18px}
.crumbs a{text-decoration:none}
.crumbs a:hover{color:var(--teal-ink)}
.post-head h1{font-size:clamp(34px,5vw,60px);font-weight:800;margin-bottom:18px}
.post-head .meta{margin-top:18px}
.cover img{width:100%;max-height:560px;object-fit:cover;border-radius:24px}
.post-grid{display:grid;grid-template-columns:230px minmax(0,1fr);gap:56px;margin-top:48px}
.toc{position:sticky;top:90px;align-self:start;font-size:14px}
.toc p{font:500 11.5px var(--mono);letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:9px;border-left:2px solid var(--line)}
.toc a{display:block;padding-left:14px;margin-left:-2px;border-left:2px solid transparent;text-decoration:none;color:var(--muted);line-height:1.35}
.toc a:hover{color:var(--ink);border-left-color:var(--teal)}
.prose{max-width:700px}
.prose h2{font-size:clamp(26px,2.8vw,34px);font-weight:800;margin:52px 0 16px;scroll-margin-top:90px}
.prose h3{font-size:21px;font-weight:700;margin:32px 0 10px;scroll-margin-top:90px}
.prose p{margin:0 0 18px}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px}
.prose li{margin-bottom:8px}
.prose li::marker{color:var(--teal)}
.prose a{color:var(--teal-ink);text-decoration-thickness:1px;text-underline-offset:3px}
.prose strong{font-weight:700}
.prose blockquote{margin:28px 0;padding:18px 24px;border-left:3px solid var(--apricot);background:var(--apricot-soft);border-radius:0 14px 14px 0}
.prose blockquote p{margin:0;font-size:17.5px}
.table{overflow-x:auto;margin:8px 0 26px;border:1px solid var(--line);border-radius:14px}
.prose table{border-collapse:collapse;width:100%;font-size:15px;font-variant-numeric:tabular-nums}
.prose th,.prose td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{background:var(--teal-soft);font-weight:700;white-space:nowrap}
.prose tr:last-child td{border-bottom:0}
.book{margin:48px 0 8px;padding:28px;border-radius:22px;background:var(--teal-soft);display:grid;gap:18px}
.book h2{margin:10px 0 8px;font-size:26px}
.book p{margin:0;color:var(--muted)}
.book-actions{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border-radius:13px;font-weight:700;text-decoration:none!important;font-size:15.5px}
.btn.primary{background:var(--teal);color:#fff!important}
.btn.primary:hover{background:var(--teal-ink)}
.btn.ghost{background:var(--paper);border:1px solid var(--line);color:var(--ink)!important}
.related{margin-top:72px}
.related h2{font-size:30px;font-weight:800;margin-bottom:22px}

@media (max-width: 900px){
  .post-grid{grid-template-columns:1fr;gap:0}
  .toc{display:none}
  .lead{grid-template-columns:1fr}
  .lead img{min-height:0;aspect-ratio:16/9}
  .cards{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 600px){
  body{font-size:16.5px}
  .top nav{gap:14px}
  .top nav a:not(.cta):not([href="/blog/"]){display:none}
  .cards{grid-template-columns:1fr}
  .cover img{border-radius:16px}
}
@media (prefers-reduced-motion: reduce){*{transition:none!important}}