/* Brand tokens mirror the datahexis.co.uk homepage stylesheet.
   --navy is the fixed dark ground used by the hero, dashboard chrome and CTA:
   it does NOT invert in dark mode (the homepage's own --navy does, which is why
   this file keeps its own name for it). The categorical --c1..--c5 palette is
   contrast-validated and is deliberately not derived from the brand colours. */
:root{
  --navy:#0f1120;
  --teal:#0d9e75;
  --teal-ink:#0a7a5a;
  --teal-light:#e0f5ee;
  --blue:#3b7dd8;
  --ink:#0f1120;
  --ink-secondary:#4a5168;
  --muted:#8490aa;
  --surface:#f1f3fb;
  --page:#f8f9ff;
  --card:#ffffff;
  --border:#e4e8f4;
  --grid:#e8ecf6;
  --axis:#c5cde3;
  --good:#0ca30c; --good-ink:#0a7f0a;
  --warning:#fab219; --warning-ink:#a06e00;
  --serious:#ec835a;
  --critical:#d03b3b; --critical-ink:#b02a2a;
  --c1:#2a78d6; --c2:#eb6834; --c3:#1baf7a; --c4:#eda100; --c5:#e87ba4;
  --code-bg:#eef1f8;
  --radius-sm:8px; --radius-md:14px; --radius-lg:20px; --radius-xl:28px;
  --shadow-md:0 4px 16px rgba(15,17,32,0.08),0 2px 6px rgba(15,17,32,0.04);
  --shadow-lg:0 12px 40px rgba(15,17,32,0.10),0 4px 12px rgba(15,17,32,0.06);
  color-scheme: light;
}
:root[data-theme="dark"]{
  --page:#0d0f1c;
  --surface:#12141f;
  --card:#161828;
  --ink:#e8eaf6;
  --ink-secondary:#b0b8d4;
  --muted:#6a7490;
  --border:#252840;
  --grid:#252840;
  --axis:#3a3f5e;
  --teal-ink:#3ddcaa;
  --teal-light:rgba(13,158,117,0.16);
  --good-ink:#3fd93f; --warning-ink:#fab219; --critical-ink:#ef7a7a;
  --c1:#3987e5; --c2:#d95926; --c3:#199e70; --c4:#c98500; --c5:#d55181;
  --code-bg:#1c1f31;
  --shadow-md:0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:0 12px 40px rgba(0,0,0,0.6);
  color-scheme: dark;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--page);color:var(--ink);font-family:'Plus Jakarta Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;line-height:1.65;transition:background .2s ease,color .2s ease;}
a{color:var(--teal-ink);}
.wrap{max-width:860px;margin:0 auto;padding:0 20px;}

/* Hero */
header.hero{background:var(--navy);color:#fff;padding:26px 0 64px;position:relative;overflow:hidden;}
.crumbs{font-size:12.5px;color:#9aa0b8;margin-bottom:14px;}
.crumbs a{color:#9aa0b8;text-decoration:none;}
.crumbs a:hover{color:#fff;}
header.hero .tag{display:inline-block;background:rgba(13,158,117,0.18);color:#7be0bd;border:1px solid rgba(13,158,117,0.4);padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.03em;margin-bottom:18px;}
header.hero h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;line-height:1.12;margin:0 0 16px;max-width:21ch;letter-spacing:-.03em;}
header.hero p.sub{color:#c7cad8;font-size:17.5px;max-width:60ch;margin:0 0 22px;}
.byline{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:#9aa0b8;}
.byline b{color:#fff;font-weight:600;}
.ecg{position:absolute;left:0;right:0;bottom:-2px;width:100%;height:64px;opacity:0.55;}

main{padding:40px 0 60px;}

/* Executive summary */
.tldr{background:var(--card);border:1px solid var(--border);border-top:3px solid var(--teal);border-radius:var(--radius-md);padding:22px 24px;margin:0 0 30px;}
.tldr h2{border:none;margin:0 0 12px;padding:0;font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--teal-ink);}
.tldr ul{margin:0;padding-left:18px;}
.tldr li{font-size:15.5px;margin-bottom:8px;color:var(--ink);}
.tldr li:last-child{margin-bottom:0;}

.toc{font-size:14px;margin:0 0 34px;padding:16px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);}
.toc b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:6px;}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:28px;}
.toc li{font-size:14px;margin-bottom:4px;break-inside:avoid;}
.toc a{text-decoration:none;}
.toc a:hover{text-decoration:underline;}

.industry-callout{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px 18px;margin:0 0 30px;}
.industry-callout .emoji{font-size:26px;line-height:1;}
.industry-callout h4{margin:0 0 4px;font-size:14px;color:var(--ink);}
.industry-callout p{margin:0;font-size:13.5px;color:var(--ink-secondary);}
.industry-callout .src{font-size:11.5px;color:var(--muted);margin-top:6px;display:block;}

h2{font-size:26px;font-weight:800;line-height:1.22;color:var(--ink);margin:52px 0 14px;padding-top:10px;border-top:1px solid var(--border);letter-spacing:-.025em;}
h3{font-size:18px;font-weight:700;letter-spacing:-.015em;color:var(--ink);margin:30px 0 8px;}
p{color:var(--ink-secondary);font-size:16.5px;}
p.lead{font-size:19.5px;color:var(--ink);line-height:1.55;}
ul,ol{padding-left:20px;}
li{margin-bottom:8px;font-size:16px;color:var(--ink-secondary);}
strong{color:var(--ink);}
blockquote{border-left:3px solid var(--teal);margin:28px 0;padding:4px 0 4px 20px;font-size:20px;line-height:1.45;font-style:italic;color:var(--ink);}

/* Insight / definition callout */
.insight{background:var(--teal-light);border-radius:var(--radius-md);padding:18px 20px;margin:26px 0;}
.insight .k{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--teal-ink);margin-bottom:6px;}
.insight p{margin:0;color:var(--ink);font-size:16px;}
.insight p + p{margin-top:8px;}

.statrow{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin:22px 0 8px;}
.statrow .s{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;}
.statrow .s b{display:block;font-family:'Lora',Georgia,serif;font-style:italic;font-weight:600;font-size:30px;line-height:1.05;color:var(--navy);margin-bottom:6px;}
.statrow .s span{font-size:13px;color:var(--ink-secondary);display:block;}
.statrow .s a{font-size:11.5px;color:var(--muted);}

.note{font-size:13.5px;color:var(--muted);font-style:italic;margin-top:-4px;}

/* Pipeline */
.pipeline{display:flex;align-items:stretch;justify-content:space-between;gap:6px;margin:26px 0 12px;flex-wrap:wrap;}
.pstep{text-align:center;flex:1;min-width:120px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 8px;}
.pstep .ic{font-size:28px;}
.pstep .t{font-weight:700;font-size:14.5px;margin-top:6px;color:var(--ink);}
.pstep .d{font-size:12px;color:var(--muted);margin-top:3px;line-height:1.4;}
.parrow{color:var(--teal);font-size:22px;flex:0 0 auto;align-self:center;}

/* Dashboard mock */
.dashboard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);margin:26px 0 12px;box-shadow:0 10px 30px rgba(15,17,32,0.08);overflow:hidden;}
.dashboard-titlebar{background:var(--navy);padding:12px 20px;font-size:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#9aa0b8;display:flex;justify-content:space-between;align-items:center;}
.dashboard-tabs{display:flex;gap:4px;padding:10px 14px;background:var(--card);border-bottom:1px solid var(--border);flex-wrap:wrap;}
.dashboard-tabs span{font-size:12.5px;font-weight:600;color:var(--muted);padding:6px 10px;border-radius:7px;}
.dashboard-tabs span.active{background:var(--teal-light);color:var(--teal-ink);}
.dashboard-body{padding:22px 22px 24px;}
.dashboard-head{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.dashboard-head h4{margin:0;font-size:15px;color:var(--ink);}
.dashboard-head span{font-size:12.5px;color:var(--muted);}
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));gap:12px;margin-bottom:22px;}
.kpi-tile{border:1px solid var(--border);border-radius:var(--radius-sm);padding:13px 14px 12px;background:var(--card);}
.kpi-tile .label{font-size:11.5px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.03em;min-height:2.6em;}
.kpi-tile .value{font-size:25px;font-weight:700;color:var(--ink);margin:2px 0 2px;}
.kpi-tile .ctx{font-size:11.5px;color:var(--muted);margin-bottom:7px;}
.status{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;white-space:nowrap;}
.status.good{background:rgba(12,163,12,0.14);color:var(--good-ink);}
.status.warning{background:rgba(250,178,25,0.22);color:var(--warning-ink);}
.status.critical{background:rgba(208,59,59,0.16);color:var(--critical-ink);}
.sub-block{margin-bottom:24px;}
.sub-block:last-child{margin-bottom:0;}
.sub-block h5{font-size:13.5px;color:var(--ink);margin:0 0 10px;}
.caption{font-size:12.5px;color:var(--muted);margin:10px 0 0;line-height:1.5;}

.heatmap{display:grid;gap:3px;font-size:11.5px;}
.heatmap .hcell{border-radius:4px;display:flex;align-items:center;justify-content:center;font-weight:700;min-height:34px;font-variant-numeric:tabular-nums;}
.heatmap .rowlabel{display:flex;align-items:center;color:var(--muted);font-weight:700;font-size:11.5px;}
.heatmap .collabel{text-align:center;color:var(--muted);font-weight:700;}
.legend-row{display:flex;align-items:center;gap:6px;margin-top:10px;font-size:11.5px;color:var(--muted);flex-wrap:wrap;}
.legend-swatch{width:14px;height:10px;border-radius:2px;display:inline-block;}

.matrix{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
.matrix .cell{border-radius:var(--radius-sm);padding:13px 14px;font-size:13px;}
.matrix .cell .qtitle{font-weight:700;font-size:13.5px;margin-bottom:3px;}
.matrix .cell p{margin:0;font-size:12.5px;color:inherit;opacity:.92;}
.cell.q1{background:rgba(12,163,12,0.10);border:1px solid rgba(12,163,12,0.35);color:var(--good-ink);}
.cell.q2{background:rgba(250,178,25,0.14);border:1px solid rgba(250,178,25,0.45);color:var(--warning-ink);}
.cell.q3{background:rgba(236,131,90,0.14);border:1px solid rgba(236,131,90,0.45);color:#a8491f;}
.cell.q4{background:rgba(208,59,59,0.10);border:1px solid rgba(208,59,59,0.40);color:var(--critical-ink);}
:root[data-theme="dark"] .cell.q3{color:#ec835a;}
.matrix-axes{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:6px;}

/* Executive charts */
.exec-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px;}
.chart-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px 22px;min-width:0;}
.chart-card.wide{grid-column:1 / -1;}
.chart-card h4{margin:0 0 3px;font-size:14.5px;color:var(--ink);}
.chart-card .kicker{font-size:12px;color:var(--muted);margin-bottom:12px;}
.chart-card svg{width:100%;height:auto;display:block;overflow:visible;}
.chart-card svg text{font-family:'Plus Jakarta Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12px;color:var(--ink-secondary);margin:0 0 10px;}
.legend span{display:inline-flex;align-items:center;gap:6px;}
.legend i{width:11px;height:11px;border-radius:3px;display:inline-block;}
.legend i.dot{border-radius:50%;}
.legend i.dash{width:16px;height:0;border-top:2px dashed var(--muted);border-radius:0;}

.barlist{display:flex;flex-direction:column;gap:10px;margin-top:4px;}
.barlist .row{display:grid;grid-template-columns:minmax(90px,34%) 1fr 64px;align-items:center;gap:10px;font-size:13px;color:var(--ink-secondary);}
.track{background:var(--grid);border-radius:4px;height:14px;position:relative;}
.fill{height:100%;border-radius:0 4px 4px 0;background:var(--teal);}
.val{text-align:right;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;}

.rank-row{display:grid;grid-template-columns:minmax(120px,24%) 1fr 58px 124px;align-items:center;gap:12px;font-size:13px;margin-bottom:10px;color:var(--ink-secondary);}
.rank-row .track{height:14px;}
.refline{position:absolute;top:-4px;bottom:-4px;width:0;border-left:2px dashed var(--muted);}

/* Dumbbell */
.db-row{display:grid;grid-template-columns:minmax(96px,26%) 1fr 64px;align-items:center;gap:10px;font-size:13px;margin-bottom:12px;color:var(--ink-secondary);}
.db-track{position:relative;height:18px;}
.db-track::before{content:"";position:absolute;left:0;right:0;top:50%;border-top:1px solid var(--grid);}
.db-gap{position:absolute;top:50%;height:4px;margin-top:-2px;background:var(--axis);border-radius:2px;}
.db-dot{position:absolute;top:50%;width:12px;height:12px;margin:-6px 0 0 -6px;border-radius:50%;box-shadow:0 0 0 2px var(--card);}
.db-axis{display:grid;grid-template-columns:minmax(96px,26%) 1fr 64px;gap:10px;font-size:11px;color:var(--muted);}
.db-axis div:nth-child(2){display:flex;justify-content:space-between;}

/* Paired bars (earned value) */
.pb-row{display:grid;grid-template-columns:minmax(120px,30%) 1fr;gap:10px;align-items:center;margin-bottom:12px;font-size:13px;color:var(--ink-secondary);}
.pb-bars{display:flex;flex-direction:column;gap:2px;}
.pb-bar{display:flex;align-items:center;gap:8px;}
.pb-bar .track{height:11px;flex:1;background:transparent;}
.pb-bar .fill{height:11px;}
.pb-bar em{font-style:normal;font-size:11.5px;font-weight:700;color:var(--ink);min-width:40px;text-align:right;font-variant-numeric:tabular-nums;}

.stackbar{display:flex;width:100%;height:34px;gap:2px;margin-top:6px;}
.stackbar div{height:100%;}
.stackbar div:first-child{border-radius:4px 0 0 4px;}
.stackbar div:last-child{border-radius:0 4px 4px 0;}
.bracket{position:relative;height:22px;margin-top:4px;font-size:11.5px;color:var(--ink-secondary);}
.bracket span{position:absolute;top:0;height:10px;border:1.5px solid var(--muted);border-top:none;}
.bracket b{position:absolute;top:10px;font-size:11.5px;color:var(--ink);white-space:nowrap;}

.sm-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.sm-grid .sm-title{font-size:12.5px;font-weight:700;color:var(--ink);margin-bottom:2px;}
.sm-grid .sm-sub{font-size:11.5px;color:var(--muted);margin-bottom:6px;}

/* Technical deep dive + FAQ */
details.deep{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);margin:18px 0;padding:0;}
details.deep > summary{cursor:pointer;list-style:none;padding:16px 20px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px;}
details.deep > summary::-webkit-details-marker{display:none;}
details.deep > summary::after{content:"+";font-size:20px;color:var(--teal-ink);font-weight:400;}
details.deep[open] > summary::after{content:"–";}
details.deep > summary small{display:block;font-weight:400;font-size:13px;color:var(--muted);margin-top:2px;}
details.deep .inner{padding:0 20px 18px;}
details.deep .inner p, details.deep .inner li{font-size:15px;}
pre{background:var(--code-bg);border:1px solid var(--border);border-radius:8px;padding:14px 16px;overflow-x:auto;font-size:12.5px;line-height:1.55;margin:10px 0 16px;}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--ink);}
p code, li code{background:var(--code-bg);padding:1px 5px;border-radius:4px;font-size:.88em;}
.tablewrap{overflow-x:auto;margin:10px 0 16px;}
table{border-collapse:collapse;width:100%;font-size:13.5px;}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);color:var(--ink-secondary);vertical-align:top;}
th{color:var(--ink);font-size:12px;text-transform:uppercase;letter-spacing:.04em;}

.faq details{border-bottom:1px solid var(--border);padding:4px 0;}
.faq summary{cursor:pointer;font-weight:700;color:var(--ink);padding:12px 0;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:14px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";color:var(--teal-ink);font-weight:400;font-size:20px;line-height:1;}
.faq details[open] summary::after{content:"–";}
.faq details p{margin:0 0 14px;font-size:15.5px;}

.sources{font-size:13px;color:var(--muted);}
.sources li{font-size:13px;color:var(--muted);margin-bottom:5px;}
.sources a{color:var(--muted);}

.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:18px 0;}
.related a{display:block;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;text-decoration:none;}
.related a b{display:block;color:var(--ink);font-size:14.5px;margin-bottom:3px;}
.related a span{color:var(--muted);font-size:13px;}
.related a:hover{border-color:var(--teal);}

.trust-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:14px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;margin:34px 0 18px;text-align:center;}
.trust-bar .stat b{display:block;font-family:'Lora',Georgia,serif;font-style:italic;font-weight:600;font-size:30px;line-height:1.05;color:var(--teal-ink);}
.trust-bar .stat span{font-size:12px;color:var(--muted);}
.cta{background:var(--navy);color:#fff;border-radius:var(--radius-lg);padding:32px 28px;text-align:center;}
.cta h3{margin:0 0 8px;font-size:22px;color:#fff;}
.cta p{color:#c7cad8;margin:0 auto 20px;font-size:15.5px;max-width:56ch;}
.btn{display:inline-block;background:var(--teal);color:#fff;font-weight:700;padding:13px 28px;border-radius:50px;text-decoration:none;font-size:15px;}
.cta small{display:block;margin-top:12px;color:#9aa0b8;font-size:12.5px;}

  .svgscroll{overflow-x:auto;}
@media (max-width:680px){
  .svgscroll svg{min-width:540px;}
  .exec-grid,.sm-grid{grid-template-columns:1fr;}
  .matrix{grid-template-columns:1fr;}
  .toc ol{columns:1;}
  .pipeline{flex-direction:column;}
  .parrow{transform:rotate(90deg);}
  .rank-row{grid-template-columns:1fr 64px;}
  .rank-row .track{grid-column:1 / -1;grid-row:2;}
  .rank-row .status{justify-self:start;}
  .heatmap{font-size:10.5px;}
}

/* Stacked rows (two-part horizontal bars with a target line) */
.sr-row{display:grid;grid-template-columns:minmax(120px,30%) 1fr 48px;align-items:center;gap:10px;font-size:13px;margin-bottom:11px;color:var(--ink-secondary);}
.sr-row .track{display:flex;gap:2px;height:16px;background:var(--grid);border-radius:4px;position:relative;overflow:visible;}
.sr-seg{height:100%;}
.sr-seg:first-child{border-radius:4px 0 0 4px;}
/* Dot-range */
.dr-row{display:grid;grid-template-columns:minmax(120px,30%) 1fr 54px;align-items:center;gap:10px;font-size:13px;margin-bottom:13px;color:var(--ink-secondary);}
.dr-track{position:relative;height:18px;}
.dr-track::before{content:"";position:absolute;left:0;right:0;top:50%;border-top:1px solid var(--grid);}
.dr-range{position:absolute;top:50%;height:8px;margin-top:-4px;background:var(--c1);opacity:.28;border-radius:4px;}
.dr-dot{position:absolute;top:50%;width:12px;height:12px;margin:-6px 0 0 -6px;border-radius:50%;background:var(--c1);box-shadow:0 0 0 2px var(--card);}

/* ═══════════════════════════════════════════════════════════════════════
   SITE SHELL — nav, footer, hub and 404 chrome.
   Values are lifted from the datahexis.co.uk homepage stylesheet so the
   insight pages sit inside the same furniture. Buttons here are namespaced
   .nbtn* to avoid colliding with base.css's article .btn.
   ═══════════════════════════════════════════════════════════════════════ */

.container{max-width:1160px;margin:0 auto;padding:0 2rem;}

.skip-link{position:absolute;left:-9999px;top:0;z-index:400;background:var(--teal);color:#fff;
  padding:10px 18px;border-radius:0 0 var(--radius-sm) 0;font-weight:700;font-size:14px;}
.skip-link:focus{left:0;}

/* ── Navigation ───────────────────────────────────────────────────────── */
nav.site-nav{position:sticky;top:0;z-index:100;background:rgba(248,249,255,0.88);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);}
:root[data-theme="dark"] nav.site-nav{background:rgba(13,15,28,0.92);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:var(--ink);text-decoration:none;}
.nav-logo .logo-mark{width:34px;height:34px;flex-shrink:0;}
.nav-logo .logo-mark svg{width:100%;height:100%;display:block;}
.nav-links{display:flex;align-items:center;gap:2rem;}
.nav-links a{font-size:14px;font-weight:500;color:var(--ink-secondary);text-decoration:none;transition:color .2s;}
.nav-links a:hover{color:var(--ink);}
.nav-links a[aria-current="page"]{color:var(--teal-ink);font-weight:700;}
.nav-cta{display:flex;align-items:center;gap:10px;}

.nbtn{display:inline-flex;align-items:center;gap:6px;font-family:inherit;font-weight:600;font-size:14px;
  padding:9px 20px;border-radius:50px;cursor:pointer;border:none;transition:all .2s;text-decoration:none;}
.nbtn-ghost{background:transparent;color:var(--ink-secondary);border:1.5px solid var(--border);}
.nbtn-ghost:hover{border-color:var(--ink);color:var(--ink);}
.nbtn-teal{background:var(--teal);color:#fff;}
.nbtn-teal:hover{background:var(--teal-ink);transform:translateY(-1px);box-shadow:0 6px 20px rgba(13,158,117,0.3);}

.theme-toggle-wrap{display:flex;align-items:center;gap:6px;}
.theme-toggle-label{font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.04em;text-transform:uppercase;}
.theme-toggle{width:46px;height:26px;border-radius:13px;border:none;cursor:pointer;background:var(--border);
  position:relative;transition:background .3s;flex-shrink:0;display:flex;align-items:center;padding:3px;}
.theme-toggle-knob{width:20px;height:20px;border-radius:50%;background:var(--card);display:flex;
  align-items:center;justify-content:center;font-size:11px;transition:transform .3s;pointer-events:none;
  box-shadow:0 1px 3px rgba(15,17,32,0.18);}
.theme-toggle-knob::before{content:'☀️';}
:root[data-theme="dark"] .theme-toggle{background:var(--teal);}
:root[data-theme="dark"] .theme-toggle-knob{transform:translateX(20px);}
:root[data-theme="dark"] .theme-toggle-knob::before{content:'🌙';}

.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;
  padding:6px;border-radius:8px;transition:background .2s;}
.hamburger:hover{background:var(--border);}
.hamburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:all .3s;}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-nav{display:none;position:fixed;top:56px;left:0;right:0;z-index:199;background:var(--card);
  border-bottom:1px solid var(--border);padding:16px 1.25rem 20px;box-shadow:var(--shadow-lg);
  flex-direction:column;gap:4px;}
.mobile-nav.open{display:flex;}
.mobile-nav a{font-size:15px;font-weight:500;color:var(--ink-secondary);text-decoration:none;
  padding:10px 12px;border-radius:var(--radius-sm);transition:all .15s;}
.mobile-nav a:hover{background:var(--surface);color:var(--ink);}
.mobile-nav .mobile-nav-cta{margin-top:8px;padding-top:12px;border-top:1px solid var(--border);
  display:flex;flex-direction:column;gap:8px;}
.mobile-nav .nbtn{justify-content:center;}

/* ── Footer ───────────────────────────────────────────────────────────── */
footer.site-footer{background:var(--card);border-top:1px solid var(--border);padding:56px 0 32px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem;margin-bottom:48px;}
.footer-brand .nav-logo{margin-bottom:0;}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.7;margin:12px 0 0;max-width:280px;}
.footer-col h4{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--ink);margin:0 0 16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--muted);text-decoration:none;transition:color .2s;}
.footer-links a:hover{color:var(--ink);}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;
  align-items:center;gap:14px;font-size:13px;color:var(--muted);}
.footer-bottom a{color:var(--muted);text-decoration:none;}
.footer-bottom a:hover{color:var(--ink);}
.footer-badges{display:flex;gap:10px;flex-wrap:wrap;}
.footer-badge{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:4px 10px;
  font-size:11px;font-weight:600;color:var(--ink-secondary);}

/* ── Insights hub ─────────────────────────────────────────────────────── */
.hub-hero{background:var(--navy);color:#fff;padding:44px 0 72px;position:relative;overflow:hidden;}
.hub-hero h1{font-size:clamp(32px,4.6vw,50px);font-weight:800;letter-spacing:-.03em;line-height:1.1;margin:0 0 16px;max-width:22ch;}
.hub-hero p.sub{color:#c7cad8;font-size:18px;max-width:62ch;margin:0;}
.hub-hero .tag{display:inline-block;background:rgba(13,158,117,0.18);color:#7be0bd;border:1px solid rgba(13,158,117,0.4);
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.03em;margin-bottom:18px;}

.hub-main{padding:52px 0 64px;}
.hub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem;}
a.ins-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:26px 26px 24px;text-decoration:none;transition:all .25s;position:relative;}
a.ins-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(13,158,117,0.3);}
.ins-card .ic-tag{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;color:var(--teal-ink);margin-bottom:14px;}
.ins-card h2{font-size:21px;font-weight:800;letter-spacing:-.025em;line-height:1.25;color:var(--ink);
  margin:0 0 10px;padding:0;border:none;}
.ins-card p{font-size:14.5px;color:var(--ink-secondary);line-height:1.65;margin:0 0 18px;}
.ins-card .ic-stat{font-family:'Lora',Georgia,serif;font-style:italic;font-weight:600;font-size:15px;
  color:var(--navy);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:10px 14px;margin:0 0 18px;line-height:1.45;}
:root[data-theme="dark"] .ins-card .ic-stat{color:var(--ink);}
.ins-card .ic-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:10px;
  font-size:12.5px;color:var(--muted);}
.ins-card .ic-go{font-weight:700;color:var(--teal-ink);}

.hub-note{background:var(--card);border:1px solid var(--border);border-left:3px solid var(--teal);
  border-radius:var(--radius-md);padding:20px 24px;margin:44px 0 0;}
.hub-note h2{font-size:16px;font-weight:800;letter-spacing:-.015em;margin:0 0 8px;padding:0;border:none;color:var(--ink);}
.hub-note p{font-size:15px;margin:0;color:var(--ink-secondary);}
.hub-note p + p{margin-top:10px;}

/* ── 404 ──────────────────────────────────────────────────────────────── */
.nf{padding:90px 0 100px;text-align:center;}
.nf .code{font-family:'Lora',Georgia,serif;font-style:italic;font-weight:600;font-size:76px;
  line-height:1;color:var(--teal-ink);margin-bottom:10px;}
.nf h1{font-size:clamp(26px,3.6vw,36px);font-weight:800;letter-spacing:-.03em;margin:0 0 14px;color:var(--ink);}
.nf p{font-size:17px;color:var(--ink-secondary);max-width:52ch;margin:0 auto 28px;}
.nf .nf-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;}

/* ── Responsive ───────────────────────────────────────────────────────── */
@media (max-width:1024px) and (min-width:769px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:2rem;}
}
@media (max-width:768px){
  .container{padding:0 1rem;}
  .nav-inner{height:56px;}
  .nav-links{display:none;}
  .hamburger{display:flex;}
  .nav-cta .nbtn-ghost{display:none;}
  .nav-cta .nbtn-teal{padding:7px 14px;font-size:12px;white-space:nowrap;}
  .theme-toggle{width:38px;height:22px;}
  .theme-toggle-knob{width:18px;height:18px;font-size:9px;}
  :root[data-theme="dark"] .theme-toggle-knob{transform:translateX(16px);}
  .theme-toggle-label{display:none;}
  footer.site-footer{padding:36px 0 20px;}
  .footer-grid{grid-template-columns:1fr;gap:1.5rem;margin-bottom:28px;}
  .footer-bottom{flex-direction:column;gap:12px;text-align:center;}
  .footer-badges{justify-content:center;}
  .hub-hero{padding:32px 0 48px;}
  .hub-main{padding:36px 0 48px;}
  .hub-grid{grid-template-columns:1fr;}
  .nf{padding:56px 0 64px;}
  .nf .code{font-size:58px;}
}