/* Blog in the Quantilan / Signal Atlas look: same palette, fonts, header and footer as the home page.
   Loaded after each page's own <style>, so it only re-points the theme variables and adds the shared chrome. */
:root {
  --bg-primary: #04070d; --bg-secondary: #0a111c; --bg-card: #0a111c;
  --text-primary: #e8eef6; --text-secondary: #8a9bb3;
  --primary: #19e68c; --secondary: #3fd8e8;
  --gradient: linear-gradient(100deg, #19e68c, #3fd8e8);
  --border-color: #1a2a40;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Golos Text", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --font-heading: var(--display);
  color-scheme: dark;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4 { font-family: var(--display); letter-spacing: -.02em; }

/* shared chrome */
.sa-header { position: sticky; top: 0; z-index: 50; background: rgba(4,7,13,.78); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border-color); }
.sa-wrap { width: min(1240px, 100%); margin: 0 auto; padding-inline: clamp(20px, 5vw, 72px); }
.sa-header .sa-wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.sa-brand { display: flex; align-items: center; gap: 10px; color: var(--text-primary); font: 800 19px/1 var(--display); text-decoration: none; }
.sa-brand img { width: 32px; height: 32px; display: block; }
.sa-links { display: flex; gap: 26px; margin-left: auto; }
.sa-links a { color: var(--text-secondary); font: 500 15px/1 var(--font-body); text-decoration: none; }
.sa-links a:hover, .sa-links a.sa-current { color: var(--text-primary); }
.sa-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 18px; border-radius: 999px; background: #19e68c; color: #04070d; font: 600 15px/1 var(--font-body); text-decoration: none; white-space: nowrap; box-shadow: 0 10px 40px -12px rgba(25,230,140,.7); }
.sa-btn:hover { background: #4ff0a8; }

.sa-footer { margin-top: 86px; border-top: 1px solid var(--border-color); padding-block: 48px 56px; color: #56677f; font: 400 14px/1.6 var(--font-body); }
.sa-footer .sa-wrap { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.sa-footer h4 { margin: 0 0 12px; color: var(--text-primary); font: 600 14px/1 var(--font-body); }
.sa-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.sa-footer a { color: var(--text-secondary); text-decoration: none; }
.sa-footer a:hover { color: var(--text-primary); }
.sa-footer p { margin: 0; }
.sa-footer .sa-fb { color: var(--text-primary); font-weight: 600; }
.sa-footer .sa-fd { margin-top: 8px; max-width: 32em; }

/* the pages' own footers are replaced by the shared one */
.blog-footer, .article-footer { display: none; }

@media (max-width: 860px) {
  .sa-header .sa-wrap { flex-wrap: wrap; height: auto; padding-block: 12px; gap: 10px 16px; }
  .sa-links { order: 3; flex-basis: 100%; margin-left: 0; gap: 18px; overflow-x: auto; white-space: nowrap; }
  .sa-btn { margin-left: auto; }
  .sa-footer .sa-wrap { grid-template-columns: 1fr 1fr; }
}


/* ---- Atlas look: ambient background, type, tags, cards, buttons -------------------------------------------- */
body { background: var(--bg-primary); position: relative; overflow-x: hidden; line-height: 1.6; }
/* the home hero's glow and fine grid, fixed at the top of every page */
body::before { content: ""; position: absolute; inset: 0 0 auto; height: 760px; z-index: -2; pointer-events: none;
  background: radial-gradient(40% 45% at 72% 12%, rgba(25,230,140,.14), transparent 70%),
              radial-gradient(35% 40% at 94% 40%, rgba(63,216,232,.11), transparent 70%),
              radial-gradient(30% 35% at 12% 6%, rgba(63,120,232,.10), transparent 70%); }
body::after { content: ""; position: absolute; inset: 0 0 auto; height: 760px; z-index: -1; pointer-events: none; opacity: .28;
  background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 56px 56px; -webkit-mask-image: radial-gradient(70% 70% at 62% 20%, #000 15%, transparent 75%); mask-image: radial-gradient(70% 70% at 62% 20%, #000 15%, transparent 75%); }
a { text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--secondary); outline-offset: 3px; border-radius: 6px; }

/* titles: white, tight; the accent gradient only on the emphasised words, as on the home page */
.blog-header h1, .article-hero h1 { font-family: var(--display); font-weight: 800; letter-spacing: -.025em; line-height: 1.02;
  color: var(--text-primary); background: none; -webkit-text-fill-color: currentColor; text-wrap: balance; }
.blog-header h1 { font-size: clamp(42px, 5.4vw, 64px); }
.article-hero h1 { font-size: clamp(34px, 4.6vw, 54px); }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.blog-header p, .article-hero .lead { color: var(--text-secondary); font-size: 18px; max-width: 34em; }
.blog-header { border-bottom-color: var(--border-color); }
.meta-row { font: 500 13px/1 var(--font-mono); color: #56677f; }

/* mono uppercase tags like the home page */
.category-badge, .card-tag, .tag-pill { font: 700 11px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; border-radius: 6px; padding: 6px 9px; border: 1px solid; }
.category-badge { background: transparent; color: var(--secondary); border-color: rgba(63,216,232,.4); }
.card-tag { margin-bottom: 14px; }
.card-tag--guide { background: transparent; color: var(--primary); border-color: rgba(25,230,140,.45); }
.card-tag--start { background: transparent; color: var(--secondary); border-color: rgba(63,216,232,.45); }
.card-tag--insight { background: transparent; color: #ffb547; border-color: rgba(255,181,71,.45); }
.tag-pill { background: transparent; color: var(--text-secondary); border-color: var(--border-color); }
.tag-pill--guide { color: var(--primary); border-color: rgba(25,230,140,.45); background: transparent; }
.tag-pill--start { color: var(--secondary); border-color: rgba(63,216,232,.45); background: transparent; }
.tag-pill--insight { color: #ffb547; border-color: rgba(255,181,71,.45); }

/* cards, key values, steps: the home page's panel, radius and hairline */
.article-card, .kv, .related-card, .callout { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 18px; box-shadow: none; }
.article-card { transition: border-color .2s, transform .2s; }
.article-card:hover, .article-card--cyan:hover { border-color: #2b4565; transform: translateY(-3px); box-shadow: none; }
.article-card:hover .card-title { color: #fff; }
.card-title { font-family: var(--display); font-size: 19px; font-weight: 700; letter-spacing: -.01em; line-height: 1.2; }
.card-excerpt { font-size: 15px; }
.card-img-placeholder { background: var(--bg-secondary); opacity: 1; color: var(--text-secondary); }
.card-meta { font: 500 12px/1 var(--font-mono); color: #56677f; }
.card-arrow { color: var(--secondary); }
.kv { padding: 18px 22px; }
.kv .label { font: 600 11px/1.3 var(--font-mono); letter-spacing: .12em; }
.kv .value { font-family: var(--display); color: var(--text-primary); }
.related-card { transition: border-color .2s, transform .2s; }
.related-card:hover, .related-card--cyan:hover { border-color: #2b4565; transform: translateY(-2px); }
.step-num { background: transparent; color: var(--secondary); border: 1px solid rgba(63,216,232,.45); font: 700 14px/1 var(--font-mono); }
.step-header h2, .article-body h2 { font-family: var(--display); font-weight: 700; letter-spacing: -.02em; }
.step-img, .tbl-wrap { border-radius: 18px; border-color: var(--border-color); }
.step-divider { border-color: var(--border-color); }
code, .inline-code, pre { font-family: var(--font-mono); }

/* buttons: round pills, one solid green call to action */
.back-link { border-radius: 999px; padding: 0 20px; min-height: 44px; border-color: var(--border-color); color: var(--text-secondary); }
.back-link:hover { border-color: var(--text-secondary); color: var(--text-primary); transform: translateY(-1px); }
.btn { border-radius: 999px; font-family: var(--font-body); font-weight: 600; }
.btn-primary { background: #19e68c; color: #04070d; border-color: #19e68c; background-image: none; box-shadow: 0 10px 40px -12px rgba(25,230,140,.7); }
.btn-primary:hover { background: #4ff0a8; border-color: #4ff0a8; color: #04070d; }
.btn-secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { border-color: var(--text-secondary); background: transparent; }