:root {
  --bg: #f6f7fa;
  --surface: #ffffff;
  --navy: #080d1a;
  --navy-mid: #101932;
  --navy-card: #131e3a;
  --teal: #059669;
  --teal-bright: #00dca0;
  --teal-tint: #e6faf3;
  --cobalt: #3b66f5;
  --ink: #0f172a;
  --muted: #4b5568;
  --navy-text: #f1f5f9;
  --navy-muted: #94a3b8;
  --border: rgba(15, 23, 42, 0.11);
  --border-dark: rgba(255, 255, 255, 0.12);
  --radius-xl: 22px;
  --radius-md: 14px;
  --shadow: 0 16px 40px rgba(8, 13, 26, 0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', system-ui, sans-serif;
  --font-mono: 'SF Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font-sans); background: var(--bg);
  color: var(--ink); line-height: 1.66; font-size: 16.5px;
}
img, svg { max-width: 100%; height: auto; }
a { color: inherit; }
.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--teal); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 200;
}
.skip:focus { left: 12px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 1.4rem; }

/* Studio Cross-Link Strip */
.studio-strip {
  background: #050913; color: var(--navy-muted); font-size: 0.82rem;
  border-bottom: 1px solid var(--border-dark); padding: 0.44rem 1.4rem; text-align: center;
}
.studio-strip a { color: var(--teal-bright); font-weight: 600; text-decoration: none; }
.studio-strip a:hover { text-decoration: underline; }

/* Sticky Header */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8, 13, 26, 0.92);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-dark); color: var(--navy-text);
}
.topbar-inner {
  max-width: 1180px; margin: 0 auto; padding: 0.78rem 1.4rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.65rem;
  text-decoration: none; font-weight: 700; font-size: 1.06rem; color: #fff; letter-spacing: -0.01em;
}
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.status-dot {
  font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em;
  background: rgba(0, 220, 160, 0.14); color: var(--teal-bright); border: 1px solid rgba(0, 220, 160, 0.32);
  padding: 0.16rem 0.5rem; border-radius: 999px; font-weight: 600;
}
.nav-links { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.nav-links a.nav-item {
  text-decoration: none; font-size: 0.92rem; font-weight: 500; color: var(--navy-muted);
  transition: color 0.16s ease;
}
.nav-links a.nav-item:hover, .nav-links a.nav-item[aria-current="page"] { color: #fff; font-weight: 600; }
.nav-cta {
  background: linear-gradient(135deg, #00dca0 0%, #3b82f6 100%);
  color: #05101f; text-decoration: none; padding: 0.48rem 0.98rem;
  border-radius: 999px; font-size: 0.85rem; font-weight: 700;
}
.nav-cta:hover { filter: brightness(1.06); }

/* Primary CTA Pill */
.cta-pill {
  display: inline-flex; align-items: center; gap: 0.75rem;
  background: var(--navy); color: #fff; text-decoration: none;
  padding: 0.8rem 1.3rem; border-radius: 14px; font-weight: 600;
  box-shadow: 0 14px 32px rgba(8, 13, 26, 0.22);
  transition: transform 0.16s ease;
}
.cta-pill:hover { transform: translateY(-2px); }
.cta-pill--light {
  background: linear-gradient(135deg, #00dca0 0%, #4e6eff 100%);
  color: #04101e; box-shadow: 0 14px 34px rgba(0, 220, 160, 0.2);
}
.cta-pill svg { width: 22px; height: 22px; flex-shrink: 0; }
.cta-pill span { display: flex; flex-direction: column; line-height: 1.18; text-align: left; }
.cta-pill small { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.82; font-family: var(--font-mono); }
.cta-pill strong { font-size: 0.97rem; font-weight: 700; }

.ghost-btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  padding: 0.84rem 1.22rem; border-radius: 14px;
  border: 1px solid var(--border-dark); background: rgba(255,255,255,0.05);
  color: #fff; text-decoration: none; font-weight: 600; font-size: 0.94rem;
}
.ghost-btn:hover { border-color: var(--teal-bright); }
.ghost-btn--ink {
  border-color: var(--border); background: #fff; color: var(--ink);
}
.ghost-btn--ink:hover { border-color: var(--teal); }

/* Hero */
.hero-dark {
  background:
    radial-gradient(880px 440px at 82% 14%, rgba(0, 220, 160, 0.14), transparent 65%),
    radial-gradient(720px 380px at 18% 88%, rgba(78, 110, 255, 0.16), transparent 65%),
    var(--navy);
  color: var(--navy-text); padding: 4.2rem 0 4.6rem; border-bottom: 1px solid var(--border-dark);
}
.hero-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 2.8rem; align-items: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 0.48rem;
  font-family: var(--font-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.07em;
  background: rgba(0, 220, 160, 0.13); color: var(--teal-bright);
  border: 1px solid rgba(0, 220, 160, 0.28);
  padding: 0.34rem 0.78rem; border-radius: 999px; font-weight: 600;
}
.hero-dark h1 {
  font-family: var(--font-display); font-size: clamp(2.25rem, 4.3vw, 3.55rem);
  line-height: 1.09; letter-spacing: -0.025em; margin: 1.05rem 0 1rem; color: #fff;
}
.hero-dark h1 em { font-style: normal; color: var(--teal-bright); }
.hero-lead { font-size: 1.1rem; color: var(--navy-muted); max-width: 600px; margin: 0 0 1.8rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; margin-bottom: 1.9rem; }
.telemetry-strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem;
  padding-top: 1.3rem; border-top: 1px solid var(--border-dark); font-size: 0.84rem; color: var(--navy-muted);
}
.telemetry-strip strong { display: block; color: #fff; font-size: 0.95rem; margin-bottom: 0.1rem; }

/* Architecture Card */
.arch-panel {
  background: var(--navy-card); border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl); padding: 1.5rem; box-shadow: 0 24px 60px rgba(0,0,0,0.38);
}
.arch-title {
  font-family: var(--font-mono); font-size: 0.74rem; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--teal-bright); margin-bottom: 0.9rem; display: block;
}
.arch-step {
  background: rgba(255,255,255,0.04); border: 1px solid var(--border-dark);
  border-radius: 12px; padding: 0.85rem 1rem; margin-bottom: 0.65rem;
}
.arch-step strong { display: block; color: #fff; font-size: 0.93rem; }
.arch-step span { font-size: 0.83rem; color: var(--navy-muted); }
.arch-arrow { text-align: center; color: var(--teal-bright); font-family: var(--font-mono); font-size: 0.8rem; margin: 0.2rem 0; }

/* Content Bands */
.band { padding: 4.3rem 0; }
.band--white { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.band--navy { background: var(--navy); color: var(--navy-text); }
.sec-head { max-width: 740px; margin-bottom: 2.3rem; }
.sec-head .mono {
  font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--teal); font-weight: 700; display: block; margin-bottom: 0.45rem;
}
.band--navy .sec-head .mono { color: var(--teal-bright); }
.sec-head h2 {
  font-family: var(--font-display); font-size: clamp(1.75rem, 3vw, 2.45rem);
  line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.7rem;
}
.sec-head p { margin: 0; color: var(--muted); font-size: 1.04rem; }
.band--navy .sec-head p { color: var(--navy-muted); }

/* Grids & Cards */
.bento-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; }
.bento-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.3rem; }
.feature-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 1.45rem; box-shadow: var(--shadow);
}
.band--navy .feature-card {
  background: var(--navy-card); border-color: var(--border-dark); box-shadow: none;
}
.feature-card .tag {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--teal); font-weight: 700;
}
.band--navy .feature-card .tag { color: var(--teal-bright); }
.feature-card h3 { margin: 0.4rem 0 0.5rem; font-size: 1.16rem; line-height: 1.3; }
.feature-card p { margin: 0; font-size: 0.94rem; color: var(--muted); }
.band--navy .feature-card p { color: var(--navy-muted); }

.link-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 1.4rem; text-decoration: none; display: flex; flex-direction: column;
  justify-content: space-between; gap: 0.85rem; box-shadow: var(--shadow);
  transition: transform 0.16s ease, border-color 0.16s ease;
}
.link-card:hover { transform: translateY(-2px); border-color: var(--teal); }
.link-card .tag { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--teal); font-weight: 700; }
.link-card h3 { margin: 0.3rem 0 0.42rem; font-size: 1.1rem; line-height: 1.32; color: var(--ink); }
.link-card p { margin: 0; font-size: 0.92rem; color: var(--muted); line-height: 1.54; }
.link-card .go { font-size: 0.86rem; font-weight: 700; color: var(--cobalt); }

/* Search Toolbar */
.toolbar { display: flex; flex-wrap: wrap; gap: 0.9rem; justify-content: space-between; align-items: center; margin-bottom: 1.6rem; }
.filter-box {
  padding: 0.68rem 1rem; border-radius: 10px; border: 1px solid var(--border);
  background: #fff; font: inherit; font-size: 0.95rem; min-width: 280px;
}

/* Page Header & Article Layout */
.page-hero {
  background: var(--navy); color: var(--navy-text); padding: 3.1rem 0 3.3rem;
  border-bottom: 1px solid var(--border-dark);
}
.crumbs {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--navy-muted);
  margin-bottom: 0.85rem; display: flex; flex-wrap: wrap; gap: 0.45rem;
}
.crumbs a { color: var(--teal-bright); text-decoration: none; }
.page-hero h1 {
  font-family: var(--font-display); font-size: clamp(1.9rem, 3.6vw, 2.85rem);
  line-height: 1.13; max-width: 880px; margin: 0.5rem 0 0.9rem; color: #fff;
}
.page-hero p { font-size: 1.06rem; color: var(--navy-muted); max-width: 780px; margin: 0; }

.article-grid {
  max-width: 1180px; margin: 0 auto; padding: 2.9rem 1.4rem 4.4rem;
  display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 2.8rem; align-items: start;
}
.prose h2 {
  font-family: var(--font-display); font-size: 1.5rem; color: var(--ink);
  margin: 2.2rem 0 0.7rem; scroll-margin-top: 90px;
}
.prose p { margin: 0 0 1.05rem; color: #1e293b; }
.prose ol, .prose ul { margin: 0 0 1.25rem; padding-left: 1.35rem; }
.prose li { margin-bottom: 0.52rem; }

.callout-box {
  background: var(--teal-tint); border-left: 4px solid var(--teal);
  padding: 1.1rem 1.3rem; border-radius: 0 12px 12px 0; margin: 0 0 1.8rem;
}
.callout-box strong {
  display: block; font-family: var(--font-mono); font-size: 0.74rem;
  text-transform: uppercase; color: #065f46; margin-bottom: 0.28rem;
}
.verdict-box {
  background: linear-gradient(135deg, #080d1a 0%, #131e3a 100%);
  color: var(--navy-text); border: 1px solid rgba(0, 220, 160, 0.35);
  border-left: 5px solid var(--teal-bright);
  padding: 1.3rem 1.45rem; border-radius: 14px; margin: 0 0 1.9rem; box-shadow: var(--shadow);
}
.verdict-box strong {
  display: block; font-family: var(--font-mono); font-size: 0.74rem;
  text-transform: uppercase; letter-spacing: 0.07em; color: var(--teal-bright); margin-bottom: 0.4rem;
}
.verdict-box p { margin: 0; color: var(--navy-text) !important; font-size: 0.99rem; line-height: 1.62; }

/* Semantic Spec Tables */
.spec-table-wrap {
  overflow-x: auto; margin: 1.55rem 0 2rem; border: 1px solid var(--border);
  border-radius: 12px; background: #fff; box-shadow: var(--shadow);
}
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.spec-table caption {
  text-align: left; padding: 0.85rem 1rem; font-weight: 700; color: var(--ink);
  background: #eff3f8; border-bottom: 1px solid var(--border);
}
.spec-table th, .spec-table td {
  padding: 0.76rem 1rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; color: var(--ink);
}
.spec-table th {
  font-family: var(--font-mono); font-size: 0.73rem; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--muted); background: #f8fafc; font-weight: 700;
}
.spec-table tr:last-child td { border-bottom: 0; }

/* Interactive Checklist */
.check-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 1.45rem; margin: 2.1rem 0; box-shadow: var(--shadow);
}
.check-card h2 { margin-top: 0; font-size: 1.3rem; }
.check-row {
  display: flex; align-items: flex-start; gap: 0.7rem; padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border); cursor: pointer; font-size: 0.94rem;
}
.check-row:last-child { border-bottom: 0; }
.check-row input { margin-top: 0.26rem; accent-color: var(--teal); width: 17px; height: 17px; flex-shrink: 0; }

/* Sidebar */
.sidebar { position: sticky; top: 84px; display: grid; gap: 1.2rem; }
.side-cta { background: var(--navy); color: var(--navy-text); border-radius: var(--radius-md); padding: 1.3rem; }
.side-cta h3 { margin: 0.35rem 0 0.45rem; font-size: 1.06rem; color: #fff; }
.side-cta p { margin: 0 0 1rem; font-size: 0.87rem; color: var(--navy-muted); line-height: 1.52; }
.side-toc { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.15rem; }
.side-toc strong {
  font-family: var(--font-mono); font-size: 0.73rem; text-transform: uppercase;
  color: var(--muted); display: block; margin-bottom: 0.55rem;
}
.side-toc a { display: block; text-decoration: none; font-size: 0.87rem; color: var(--muted); padding: 0.3rem 0; }
.side-toc a:hover { color: var(--teal); }

/* FAQ Stack */
.qa-stack { display: grid; gap: 0.72rem; margin-top: 1rem; }
.qa-card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 0.98rem 1.15rem; }
.qa-card summary { font-weight: 700; cursor: pointer; color: var(--ink); }
.qa-card p { margin: 0.62rem 0 0; color: var(--muted); font-size: 0.94rem; }

/* Footer */
.footer {
  background: var(--navy); color: var(--navy-muted); padding: 3.2rem 0;
  font-size: 0.89rem; border-top: 1px solid var(--border-dark);
}
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; align-items: flex-start; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.15rem; margin-top: 0.7rem; }
.footer-links a { color: var(--navy-text); text-decoration: none; }
.footer-links a:hover { color: var(--teal-bright); }

@media (max-width: 960px) {
  .hero-grid, .bento-grid, .bento-2, .article-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}
@media (max-width: 640px) {
  .telemetry-strip { grid-template-columns: 1fr; }
  .nav-links a.hide-sm { display: none; }
  .filter-box { min-width: 100%; }
}