:root{
  --bg:#fff;--fg:#2b2a27;--muted:#6b6a66;--line:#e6e5e1;--soft:#f6f5f2;--link:#2a5a9a;--accent:#2a5a9a;--accent-fg:#fff;
  --purple:#e9e0f5;--blue:#dbeaf7;--green:#dcefe4;--gray:#ecebe8;--hdr:rgba(255,255,255,.88);
}
@media (prefers-color-scheme:dark){
  :root{--bg:#171717;--fg:#e8e6e1;--muted:#a09e99;--line:#2e2e2e;--soft:#222;--link:#82b3ec;--accent:#82b3ec;--accent-fg:#111;
  --purple:#3b2f52;--blue:#22374d;--green:#233e31;--gray:#2d2d2d;--hdr:rgba(23,23,23,.88)}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);
  font:17px/1.65 ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  min-height:100vh;display:flex;flex-direction:column}
.skip{position:absolute;left:-999px;top:0;background:var(--bg);padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}

/* fixed top navigation */
.site-header{position:sticky;top:0;z-index:50;background:var(--hdr);
  -webkit-backdrop-filter:saturate(1.4) blur(10px);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.bar{max-width:1040px;margin:0 auto;padding:0 20px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-weight:700;font-size:1.05rem;color:var(--fg);text-decoration:none;letter-spacing:-.01em;white-space:nowrap}
.nav{display:flex;gap:4px}
.nav a{color:var(--fg);text-decoration:none;font-weight:500;font-size:.98rem;padding:8px 12px;border-radius:6px}
.nav a:hover{background:var(--soft)}
.nav a.on{background:var(--soft);font-weight:600}

.wrap{max-width:1040px;margin:0 auto;padding:0 20px;width:100%}
main.wrap{flex:1;padding-bottom:56px}
.prose{max-width:720px;margin:0 auto}
h1{font-size:2.3rem;line-height:1.15;margin:1.3em 0 .35em;letter-spacing:-.02em}
h2{font-size:1.5rem;line-height:1.3;margin:1.7em 0 .4em;letter-spacing:-.01em}
h3{font-size:1.12rem;margin:1.7em 0 .3em;letter-spacing:.03em}
h4{font-size:1.03rem;margin:1.4em 0 .2em}
p,li{margin:.65em 0}
ul,ol{padding-left:1.3em}
a{color:var(--link);text-underline-offset:3px}
hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.muted{color:var(--muted)}
.date{color:var(--muted);margin-bottom:0}
.kicker{margin:1.6em 0 0;color:var(--muted);font-weight:600;font-size:.85rem;letter-spacing:.06em;text-transform:uppercase}
.lead{font-size:1.2rem;line-height:1.55;color:var(--muted);max-width:680px}
blockquote{margin:1em 0;padding:.1em 1em;border-left:3px solid var(--fg)}

/* hero + page heads */
.hero{padding:56px 0 24px}
.hero h1{font-size:3.2rem;margin:.2em 0 .3em}
.pagehead{padding:8px 0 8px}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:1.4em}
.btn{display:inline-block;background:var(--accent);color:var(--accent-fg);text-decoration:none;font-weight:600;padding:10px 18px;border-radius:8px}
.btn:hover{opacity:.9}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--soft);opacity:1}
.sechead{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-top:2.6em}
.sechead h2{margin:0 0 .6em}
.sechead a{font-size:.95rem;white-space:nowrap}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cards.one{grid-template-columns:1fr;gap:18px;margin-top:1.4em}
.card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:12px;padding:20px;color:var(--fg);text-decoration:none;background:var(--bg);transition:box-shadow .15s,transform .15s,border-color .15s}
a.card:hover{box-shadow:0 6px 22px rgba(0,0,0,.08);transform:translateY(-2px);border-color:var(--muted)}
.card h3{margin:.8em 0 .1em;font-size:1.15rem;letter-spacing:0;line-height:1.35}
.card p{margin:.5em 0}
.card .more{margin-top:auto;padding-top:.8em;color:var(--link);font-style:normal;font-weight:600}
.card.static{background:var(--soft)}
.meta{color:var(--muted);font-size:.9rem}
.tagrow{display:flex;flex-wrap:wrap;gap:6px;margin:.3em 0 .4em}
.chips{list-style:none;padding:0;margin:.6em 0 0;display:flex;flex-wrap:wrap;gap:8px}
.chips li{margin:0;background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:3px 12px;font-size:.88rem}
.tag{display:inline-block;align-self:flex-start;font-size:.78rem;font-weight:600;padding:2px 9px;border-radius:4px;color:var(--fg)}
.purple{background:var(--purple)}.blue{background:var(--blue)}.green{background:var(--green)}.gray{background:var(--gray);font-weight:500}
.connect{margin-top:3em}
.connect h2{margin-top:0}

/* case study / article pages */
.crumbs{margin-top:28px;color:var(--muted);font-size:.92rem}
.crumbs a{color:var(--muted)}
.jump{background:var(--soft);border-radius:8px;padding:10px 14px;font-size:.95rem}
.toc{list-style:none;padding:0}
.tbl{overflow-x:auto;margin:1em 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}
th{background:var(--soft)}
figure{margin:1.5em 0}
figure img{max-width:100%;height:auto;border-radius:8px;display:block}
figcaption{color:var(--muted);font-size:.9rem;margin-top:.4em}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.note{color:var(--muted);font-size:.95rem}
.tags{margin-top:1.6em}
.pager{color:var(--muted)}
.pager2{display:flex;justify-content:space-between;gap:12px;margin:3em 0 0;padding-top:1.2em;border-top:1px solid var(--line);font-weight:600}
.pager2 a{text-decoration:none}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--soft);margin-top:auto}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 32px;padding-top:24px;padding-bottom:28px;font-size:.93rem}
.foot p{margin:.2em 0}

@media (max-width:820px){
  .cards{grid-template-columns:1fr}
  .hero h1{font-size:2.35rem}
  .hero{padding-top:32px}
}
@media (max-width:640px){
  body{font-size:16px}
  .two{grid-template-columns:1fr}
  h1{font-size:1.75rem}
  .bar{height:auto;padding:8px 14px;flex-wrap:wrap;row-gap:0}
  .brand{font-size:1rem}
  .nav{gap:0;margin-left:-8px}
  .nav a{padding:8px 9px;font-size:.93rem}
  html{scroll-padding-top:104px}
  .wrap{padding:0 16px}
}