/* ============================================================
   InstantIndexingPro — Blog styles
   Brand-matched. Light + dark. Editorial typography.
   Generated/maintained via the shared blog engine.
   ============================================================ */

:root{
  --paper:#f3f6fb; --surface:#ffffff;
  --ink:#0d1a3a; --ink-2:#2b3a63; --muted:#5a6788;
  --line:#d9e1ee; --line-2:#c3cee2;
  --signal:#1d4ed8; --signal-soft:#e3eafd;
  --amber:#c27803; --hl:#f5b301; --live:#08916a;
  --radius:16px; --radius-sm:10px; --radius-lg:22px;
  --maxw:1120px; --prose:720px;
  --shadow:0 1px 2px rgba(13,26,58,.04), 0 10px 30px -12px rgba(13,26,58,.14);
  --shadow-lg:0 2px 4px rgba(13,26,58,.05), 0 24px 60px -20px rgba(13,26,58,.26);
  /* Fonts: overridden per-site by an inline :root style in <head>. */
  --font-body:"Overpass",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-head:"Overpass",system-ui,-apple-system,"Segoe UI",sans-serif;
  --head:var(--font-head);
  --ease:cubic-bezier(.2,.7,.2,1);
}
:root[data-theme="dark"]{
  --paper:#0b1430; --surface:#111c43;
  --ink:#e9efff; --ink-2:#c4cff0; --muted:#93a1c7;
  --line:#22315f; --line-2:#34467e;
  --signal:#7b97ff; --signal-soft:rgba(123,151,255,.14);
  --amber:#f2b23c; --hl:#f2b23c; --live:#3ad6a0;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 10px 30px -12px rgba(0,0,0,.5);
  --shadow-lg:0 2px 4px rgba(0,0,0,.35), 0 24px 60px -20px rgba(0,0,0,.6);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0b1430; --surface:#111c43;
    --ink:#e9efff; --ink-2:#c4cff0; --muted:#93a1c7;
    --line:#22315f; --line-2:#34467e;
    --signal:#7b97ff; --signal-soft:rgba(123,151,255,.14);
    --amber:#f2b23c; --hl:#f2b23c; --live:#3ad6a0;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 10px 30px -12px rgba(0,0,0,.5);
    --shadow-lg:0 2px 4px rgba(0,0,0,.35), 0 24px 60px -20px rgba(0,0,0,.6);
  }
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0; font-family:var(--font-body); color:var(--ink);
  background:var(--paper);
  background-image:
    radial-gradient(1200px 500px at 85% -5%, var(--signal-soft), transparent 60%),
    radial-gradient(900px 500px at -5% 10%, rgba(8,145,106,.06), transparent 55%),
    radial-gradient(circle at 1px 1px, var(--line) 1px, transparent 0);
  background-size:auto,auto,22px 22px;
  background-attachment:fixed,fixed,fixed;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  line-height:1.6;
}
a{color:var(--signal);text-decoration:none}
a:hover{text-decoration:underline}
/* Display/heading type uses the head font; body copy uses the body font. */
.brand,.blog-hero h1,.blog-hero .eyebrow,.article-head h1,.card h3,.card h2,.featured h2,
.cta-band h3,.related h3,.prose h2,.prose h3,.author-box h4,.takeaways .t-title,
h1,h2,h3,h4{font-family:var(--font-head)}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ---------- Reading progress ---------- */
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--signal);z-index:60;transition:width .1s linear}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 86%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:18px;letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand .mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(145deg,var(--signal),#3b6ef5);
  display:grid;place-items:center;color:#fff;box-shadow:0 6px 16px -6px var(--signal)}
.brand .mark svg{width:17px;height:17px}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a.navlink{color:var(--ink-2);font-weight:600;font-size:14.5px;padding:8px 12px;border-radius:9px;transition:.15s var(--ease)}
.nav a.navlink:hover{color:var(--ink);background:var(--signal-soft);text-decoration:none}
.nav a.navlink[aria-current="page"]{color:var(--signal)}
.icon-btn{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);cursor:pointer;transition:.15s var(--ease)}
.icon-btn:hover{color:var(--ink);border-color:var(--line-2)}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14.5px;border-radius:999px;
  padding:9px 18px;border:1px solid transparent;cursor:pointer;transition:.15s var(--ease);white-space:nowrap}
.btn-primary{background:var(--signal);color:#fff;box-shadow:0 8px 20px -10px var(--signal)}
.btn-primary:hover{filter:brightness(1.07);text-decoration:none;transform:translateY(-1px)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--line-2);text-decoration:none}
.menu-toggle{display:none}

/* ---------- Blog index hero ---------- */
.blog-hero{padding:68px 0 26px}
.blog-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:13px;
  color:var(--signal);background:var(--signal-soft);padding:6px 13px;border-radius:999px;letter-spacing:.01em}
.blog-hero .eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--live);box-shadow:0 0 0 4px color-mix(in srgb,var(--live) 22%,transparent)}
.blog-hero h1{font-size:clamp(38px,6vw,62px);font-weight:900;letter-spacing:-.03em;line-height:1.02;margin:18px 0 0}
.blog-hero p.lead{font-size:clamp(16px,2.2vw,19px);color:var(--muted);max-width:620px;margin:16px 0 0}

/* ---------- Tag filter row ---------- */
.tagbar{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 8px}
.tagbar a{font-size:13.5px;font-weight:600;color:var(--ink-2);background:var(--surface);
  border:1px solid var(--line);padding:7px 14px;border-radius:999px;transition:.15s var(--ease)}
.tagbar a:hover{border-color:var(--signal);color:var(--signal);text-decoration:none}
.tagbar a.active{background:var(--signal);color:#fff;border-color:var(--signal)}

/* ---------- Post grid ---------- */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:28px 0 10px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);transition:.2s var(--ease);display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.card a{color:inherit}.card a:hover{text-decoration:none}
.card .cover{aspect-ratio:16/9;position:relative;overflow:hidden}
.card .cover .ph{position:absolute;inset:0}
.card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.chip{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
  color:var(--signal);background:var(--signal-soft);padding:4px 10px;border-radius:999px}
.card h3{font-size:19px;font-weight:800;letter-spacing:-.02em;line-height:1.25;margin:12px 0 0}
.card h3 a:hover{color:var(--signal)}
.card .excerpt{color:var(--muted);font-size:14.5px;margin:9px 0 0;flex:1}
.meta{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:var(--muted)}
.meta .avatar{width:26px;height:26px;border-radius:50%;background:var(--signal-soft);object-fit:cover;border:1px solid var(--line)}
.meta .sep{width:3px;height:3px;border-radius:50%;background:var(--line-2)}

/* Featured (first post spans full row) */
.featured{display:grid;grid-template-columns:1.15fr .85fr;gap:0;margin:30px 0 4px;align-items:stretch}
.featured .cover{aspect-ratio:auto;min-height:280px}
.featured .body{padding:34px 38px;justify-content:center}
.featured .chip{align-self:flex-start}
.featured h2{font-size:clamp(24px,3.2vw,33px);font-weight:900;letter-spacing:-.025em;line-height:1.1;margin:14px 0 0}
.featured h2 a:hover{color:var(--signal)}
.featured .excerpt{font-size:16px;margin-top:12px}

/* ---------- CTA band ---------- */
.cta-band{margin:56px 0;border-radius:var(--radius-lg);padding:44px 40px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0d1a3a,#1a2a5c);color:#eaf0ff;box-shadow:var(--shadow-lg)}
:root[data-theme="dark"] .cta-band{background:linear-gradient(135deg,#16224d,#0d1733);border:1px solid var(--line-2)}
.cta-band::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 240px at 88% 10%,rgba(123,151,255,.35),transparent 60%);pointer-events:none}
.cta-band .inner{position:relative;max-width:640px}
.cta-band .eyebrow{color:#9fb4ff;font-weight:700;font-size:13px;letter-spacing:.04em;text-transform:uppercase}
.cta-band h3{font-size:clamp(22px,3vw,30px);font-weight:900;letter-spacing:-.02em;margin:10px 0 0;color:#fff}
.cta-band p{color:#c3cef0;margin:12px 0 22px;font-size:15.5px}
.cta-band .btn-primary{background:#fff;color:#0d1a3a}
.cta-band .btn-primary:hover{background:#eef2ff}

/* ---------- Article ---------- */
.article-head{padding:48px 0 8px}
.breadcrumb{font-size:13.5px;color:var(--muted);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--signal)}
.article-head .chip{margin-top:20px}
.article-head h1{font-size:clamp(30px,5vw,50px);font-weight:900;letter-spacing:-.03em;line-height:1.05;
  margin:16px 0 0;max-width:15ch}
.article-head .dek{font-size:clamp(17px,2.4vw,21px);color:var(--ink-2);max-width:var(--prose);margin:18px 0 0;font-weight:500}
.byline{display:flex;align-items:center;gap:12px;margin:26px 0 0;flex-wrap:wrap}
.byline .avatar{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--signal-soft)}
.byline .who{font-weight:700;color:var(--ink);font-size:14.5px;line-height:1.2}
.byline .who span{display:block;font-weight:500;color:var(--muted);font-size:13px;margin-top:2px}
.byline .stat{font-size:13.5px;color:var(--muted)}
.article-cover{margin:30px 0 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:21/9}

/* Layout: prose + sticky TOC */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:56px;padding:40px 0 20px;align-items:start}
.toc{position:sticky;top:88px;font-size:14px}
.toc .toc-title{text-transform:uppercase;letter-spacing:.06em;font-size:11.5px;font-weight:700;color:var(--muted);margin-bottom:12px}
.toc ul{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.toc li a{display:block;padding:5px 0 5px 14px;margin-left:-2px;border-left:2px solid transparent;color:var(--muted);font-weight:500;line-height:1.35}
.toc li a:hover{color:var(--ink);text-decoration:none}
.toc li a.active{color:var(--signal);border-left-color:var(--signal);font-weight:600}
.toc li.sub a{padding-left:26px;font-size:13px}

/* ---------- Prose ---------- */
.prose{max-width:var(--prose);font-size:18px;color:var(--ink-2)}
.prose>*+*{margin-top:1.25em}
.prose p{line-height:1.75}
.prose h2{font-size:28px;font-weight:800;letter-spacing:-.02em;color:var(--ink);line-height:1.2;margin-top:2em;scroll-margin-top:84px}
.prose h3{font-size:21px;font-weight:800;letter-spacing:-.01em;color:var(--ink);margin-top:1.6em;scroll-margin-top:84px}
.prose h2+p,.prose h3+p{margin-top:.6em}
.prose a{font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-color:color-mix(in srgb,var(--signal) 40%,transparent)}
.prose a:hover{text-decoration-color:var(--signal)}
.prose strong{color:var(--ink);font-weight:700}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.5em 0;line-height:1.7}
.prose li::marker{color:var(--signal)}
.prose blockquote{margin-left:0;padding:4px 0 4px 22px;border-left:3px solid var(--signal);
  color:var(--ink);font-size:20px;font-weight:500;font-style:normal}
.prose img{border-radius:var(--radius);border:1px solid var(--line);margin:1.6em 0}
.prose figure{margin:1.6em 0}
.prose figcaption{font-size:13.5px;color:var(--muted);text-align:center;margin-top:10px}
.prose code{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:.86em;
  background:var(--signal-soft);color:var(--ink);padding:.15em .4em;border-radius:6px;font-weight:600}
.prose pre{background:#0b1430;color:#e6ecff;border-radius:var(--radius);padding:20px 22px;overflow:auto;
  border:1px solid var(--line-2);font-size:14px;line-height:1.6}
.prose pre code{background:none;color:inherit;padding:0;font-weight:400;font-size:13.5px}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.prose th{background:var(--signal-soft);text-align:left;font-weight:700;color:var(--ink)}
.prose th,.prose td{padding:11px 15px;border-bottom:1px solid var(--line)}
.prose tr:last-child td{border-bottom:0}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* Callouts & key takeaways */
.callout{display:flex;gap:14px;padding:18px 20px;border-radius:var(--radius);border:1px solid var(--line);
  background:var(--surface);margin:1.8em 0;box-shadow:var(--shadow)}
.callout .ic{flex:none;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--signal-soft);color:var(--signal)}
.callout.tip .ic{background:rgba(8,145,106,.14);color:var(--live)}
.callout.warn .ic{background:rgba(242,178,60,.16);color:var(--amber)}
.callout p{margin:0;font-size:15.5px;color:var(--ink-2)}
.callout strong{color:var(--ink)}
.takeaways{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin:0 0 6px;box-shadow:var(--shadow)}
.takeaways .t-title{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--ink);font-size:15px;margin-bottom:12px}
.takeaways ul{margin:0;padding-left:1.1em}
.takeaways li{color:var(--ink-2);font-size:15px;margin:.4em 0}

/* Share + tags footer */
.article-foot{max-width:var(--prose);margin:14px 0 0}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0}
.tag-list a{font-size:13px;font-weight:600;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);padding:6px 13px;border-radius:999px}
.tag-list a:hover{border-color:var(--signal);color:var(--signal);text-decoration:none}
.share{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.share span{font-weight:700;font-size:14px;color:var(--ink)}
.share a{color:var(--ink-2)}.share a:hover{color:var(--signal)}

/* Author bio */
.author-box{display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;margin:28px 0;box-shadow:var(--shadow)}
.author-box .avatar{width:56px;height:56px;border-radius:50%;flex:none;border:1px solid var(--line);background:var(--signal-soft)}
.author-box h4{margin:0;font-size:16px;font-weight:800;color:var(--ink)}
.author-box .role{color:var(--signal);font-weight:600;font-size:13px;margin:2px 0 8px}
.author-box p{margin:0;color:var(--muted);font-size:14.5px}

/* Related + prev/next */
.related{padding:16px 0 0}
.related h3{font-size:22px;font-weight:900;letter-spacing:-.02em;margin:0 0 18px}
.related .posts{grid-template-columns:repeat(3,1fr);padding:0}

/* ---------- Footer ---------- */
.site-footer{margin-top:72px;border-top:1px solid var(--line);background:var(--surface)}
.site-footer .wrap{padding:52px 24px 34px}
.sf-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px}
.sf-brand .brand{margin-bottom:14px}
.sf-brand p{color:var(--muted);font-size:14px;max-width:320px;margin:0 0 16px}
.sf-status{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--ink-2)}
.sf-status .live-dot{width:8px;height:8px;border-radius:50%;background:var(--live);box-shadow:0 0 0 4px color-mix(in srgb,var(--live) 20%,transparent)}
.sf-col h4{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 14px}
.sf-col a{display:block;color:var(--ink-2);font-size:14px;font-weight:500;padding:5px 0}
.sf-col a:hover{color:var(--signal);text-decoration:none}
.sf-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .posts{grid-template-columns:repeat(2,1fr)}
  .featured{grid-template-columns:1fr}
  .featured .cover{min-height:200px}
  .article-grid{grid-template-columns:1fr;gap:0}
  .toc{display:none}
  .sf-grid{grid-template-columns:1fr 1fr}
  .sf-brand{grid-column:1/-1}
}
@media (max-width:620px){
  .wrap{padding:0 16px}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;background:var(--surface);
    border-bottom:1px solid var(--line);padding:12px 16px;gap:2px;box-shadow:var(--shadow-lg)}
  .nav.open a.navlink{padding:12px}
  .menu-toggle{display:grid}
  .posts{grid-template-columns:1fr}
  .related .posts{grid-template-columns:1fr}
  .sf-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 24px}
  .blog-hero{padding:44px 0 18px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

@media (min-width:1500px){.posts{grid-template-columns:repeat(4,1fr)}}

.quick-answer{margin:22px 0;padding:18px 22px;border:1px solid var(--line);border-left:4px solid var(--signal);border-radius:14px;background:var(--card)}
.quick-answer .qa-label{display:inline-block;font-weight:800;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--signal);margin-bottom:6px}
.quick-answer p{font-size:17px;line-height:1.6;margin:0}
.quick-answer .qa-q{margin-top:8px!important;font-size:13.5px!important;color:var(--line-2)!important}