/* Apextech Solution — Blog. Matches main site design tokens:
   ink-950 #05080f · ink-900 #0a0f1b · ink-800 #111a2e · ink-700 #1b2942
   mist-100 #eef1f6 · mist-300 #c3ccd9 · mist-400 #9aa7ba
   brand-500 #8b5cf6 · brand-600 #7c3aed · spine-400 #22d3ee */

:root {
  --ink-950: #05080f;
  --ink-900: #0a0f1b;
  --ink-800: #111a2e;
  --ink-700: #1b2942;
  --mist-100: #eef1f6;
  --mist-300: #c3ccd9;
  --mist-400: #9aa7ba;
  --mist-500: #74839b;
  --brand-300: #c4b5fd;
  --brand-400: #a78bfa;
  --brand-500: #8b5cf6;
  --brand-600: #7c3aed;
  --spine-400: #22d3ee;
  --content-w: 780px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--ink-950);
  color: var(--mist-300);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .display {
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  color: var(--mist-100);
  line-height: 1.2;
  font-weight: 600;
}

a { color: var(--brand-400); text-decoration: none; }
a:hover { color: var(--brand-300); }

/* ============ header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 8, 15, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.14);
}
.site-header .inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--mist-100);
}
.brand .mark {
  width: 26px;
  height: 26px;
  flex: none;
}
.brand:hover { color: #fff; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  color: var(--mist-400);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
}
.nav-links a:hover { color: var(--mist-100); background: var(--ink-800); }
.nav-links a.active { color: var(--brand-300); background: rgba(139, 92, 246, 0.12); }
.nav-links a.cta {
  color: var(--mist-100);
  background: var(--brand-600);
}
.nav-links a.cta:hover { background: var(--brand-500); }

/* ============ article hero ============ */
.hero {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 48px 20px 12px;
}
.crumbs {
  font-size: 13px;
  color: var(--mist-500);
  margin-bottom: 22px;
}
.crumbs a { color: var(--mist-400); }
.crumbs a:hover { color: var(--brand-300); }
.crumbs .sep { margin: 0 8px; color: var(--ink-700); }

.chip-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 18px; }
.chip {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-300);
  background: rgba(139, 92, 246, 0.13);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 999px;
  padding: 5px 12px;
}
.meta-line { font-size: 13.5px; color: var(--mist-500); }
.meta-line .dot { margin: 0 7px; }

.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  letter-spacing: -0.01em;
  margin: 6px 0 20px;
}
.byline {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0 8px;
  border-top: 1px solid var(--ink-800);
  font-size: 13.5px;
  color: var(--mist-500);
}
.byline .avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-600), var(--spine-400));
  display: grid;
  place-items: center;
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 13px;
  flex: none;
}
.byline a { color: var(--mist-300); font-weight: 600; }

/* ============ body ============ */
.article {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 18px 20px 64px;
}
.article > section { margin-top: 40px; }
.article h2 {
  font-size: clamp(21px, 3vw, 26px);
  margin: 52px 0 6px;
  padding-top: 8px;
}
.article h3 { font-size: 18px; margin: 30px 0 6px; color: var(--brand-300); }
.article p { margin: 14px 0; max-width: 72ch; }
.article ul, .article ol { margin: 16px 0 16px 22px; max-width: 70ch; }
.article li { margin: 8px 0; }
.article li::marker { color: var(--brand-500); }

/* takeaways */
.takeaways {
  background: linear-gradient(180deg, var(--ink-900), var(--ink-950));
  border: 1px solid var(--ink-700);
  border-top: 3px solid var(--brand-600);
  border-radius: 14px;
  padding: 24px 26px;
  margin-top: 26px !important;
}
.takeaways h2 { margin-top: 0; font-size: 16px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brand-300); }
.takeaways ul { margin: 12px 0 0 20px; }
.takeaways li { font-size: 15.5px; line-height: 1.6; }

/* tables */
.table-wrap {
  overflow-x: auto;
  margin: 22px 0;
  border: 1px solid var(--ink-700);
  border-radius: 12px;
}
.article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 560px;
}
.article thead th {
  background: var(--ink-800);
  color: var(--mist-100);
  font-family: "Space Grotesk", sans-serif;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-align: left;
  padding: 12px 14px;
  white-space: nowrap;
}
.article tbody td {
  padding: 11px 14px;
  border-top: 1px solid var(--ink-800);
  vertical-align: top;
}
.article tbody tr:nth-child(even) { background: rgba(17, 26, 46, 0.35); }
.article tbody td:first-child { color: var(--mist-100); font-weight: 500; }

/* stat blockquotes */
.article blockquote.stat {
  border-left: 3px solid var(--spine-400);
  background: linear-gradient(90deg, rgba(34, 211, 238, 0.07), transparent 70%);
  padding: 16px 20px;
  margin: 22px 0;
  border-radius: 0 10px 10px 0;
  color: var(--mist-100);
  font-size: 16px;
  font-style: italic;
  max-width: 70ch;
}
.article blockquote.stat strong { color: var(--spine-400); font-style: normal; }

/* callout */
.callout {
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 14px;
  padding: 22px 24px;
  margin: 30px 0;
}
.callout h2, .callout h3 { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

/* toc */
.toc {
  background: var(--ink-900);
  border: 1px solid var(--ink-800);
  border-radius: 14px;
  padding: 18px 22px;
  margin-top: 28px;
}
.toc h2 { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mist-500); margin: 0 0 10px; }
.toc ol { margin: 0 0 0 18px; }
.toc li { margin: 6px 0; font-size: 14.5px; }
.toc a { color: var(--mist-300); }
.toc a:hover { color: var(--brand-300); }

/* faq */
.faq details {
  border: 1px solid var(--ink-800);
  border-radius: 12px;
  background: var(--ink-900);
  margin: 12px 0;
  overflow: hidden;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--mist-100);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "Q";
  color: var(--brand-400);
  font-weight: 700;
  flex: none;
}
.faq details[open] summary { border-bottom: 1px solid var(--ink-800); color: var(--brand-300); }
.faq details p { padding: 14px 20px; margin: 0; }

/* ============ related + cta + footer ============ */
.related {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 12px;
  border-top: 1px solid var(--ink-800);
}
.related h2 { font-size: 22px; margin-bottom: 18px; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  background: var(--ink-900);
  border: 1px solid var(--ink-800);
  border-radius: 14px;
  padding: 20px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(139, 92, 246, 0.45); }
.card .cat {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-400);
}
.card h3 { font-size: 16.5px; margin: 10px 0 8px; color: var(--mist-100); line-height: 1.35; }
.card p { font-size: 13.5px; color: var(--mist-500); line-height: 1.55; margin: 0 0 12px; }
.card .card-meta { font-size: 12px; color: var(--mist-500); }

.cta-band {
  max-width: 960px;
  margin: 32px auto 0;
  padding: 0 20px 40px;
}
.cta-inner {
  background:
    radial-gradient(600px 200px at 20% 0%, rgba(139, 92, 246, 0.25), transparent 60%),
    radial-gradient(500px 200px at 90% 100%, rgba(34, 211, 238, 0.15), transparent 60%),
    var(--ink-900);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: 18px;
  padding: 40px 32px;
  text-align: center;
}
.cta-inner h2 { font-size: clamp(22px, 3.4vw, 30px); }
.cta-inner p { max-width: 560px; margin: 14px auto 26px; color: var(--mist-400); font-size: 15.5px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 14.5px;
  padding: 13px 26px;
  border-radius: 10px;
  transition: background 0.15s ease, transform 0.15s ease;
}
.btn-primary { background: var(--brand-600); color: #fff; }
.btn-primary:hover { background: var(--brand-500); color: #fff; transform: translateY(-1px); }
.btn-ghost { border: 1px solid var(--ink-700); color: var(--mist-300); background: transparent; }
.btn-ghost:hover { border-color: var(--brand-500); color: var(--mist-100); }

.site-footer {
  border-top: 1px solid var(--ink-800);
  background: var(--ink-900);
  margin-top: auto;
}
.site-footer .inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--mist-500);
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.site-footer a { color: var(--mist-400); }
.site-footer a:hover { color: var(--brand-300); }

/* ============ blog index ============ */
.blog-hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 72px 20px 30px;
  position: relative;
}
.blog-hero .glow {
  position: absolute;
  inset: -80px 0 auto;
  height: 340px;
  background:
    radial-gradient(500px 200px at 15% 0%, rgba(139, 92, 246, 0.18), transparent 65%),
    radial-gradient(400px 180px at 85% 20%, rgba(34, 211, 238, 0.1), transparent 65%);
  pointer-events: none;
}
.blog-hero h1 {
  font-size: clamp(30px, 5.5vw, 46px);
  letter-spacing: -0.015em;
  max-width: 720px;
}
.blog-hero .sub {
  max-width: 640px;
  color: var(--mist-400);
  font-size: 17px;
  margin-top: 16px;
}
.filter-row {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-chip {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mist-400);
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  padding: 6px 14px;
}
.index-grid {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 20px 72px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}
.index-card {
  display: flex;
  flex-direction: column;
  background: var(--ink-900);
  border: 1px solid var(--ink-800);
  border-radius: 16px;
  padding: 24px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.index-card:hover { transform: translateY(-3px); border-color: rgba(139, 92, 246, 0.45); }
.index-card h2 { font-size: 19px; line-height: 1.35; margin: 10px 0 10px; }
.index-card h2 a { color: var(--mist-100); }
.index-card h2 a:hover { color: var(--brand-300); }
.index-card .excerpt { font-size: 14px; color: var(--mist-500); line-height: 1.6; flex: 1; }
.index-card .card-meta { font-size: 12.5px; color: var(--mist-500); margin-top: 16px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header .inner { padding: 0 16px; }
  .nav-links a { padding: 8px 10px; }
  .nav-links a.cta { display: none; }
  .article { padding: 12px 16px 48px; }
  .hero { padding: 36px 16px 8px; }
  .article table { min-width: 480px; }
}

@media print {
  .site-header, .related, .cta-band, .site-footer, .toc { display: none; }
  body { background: #fff; color: #111; }
}