:root {
  --bg: #0f172a;
  --card: #ffffff;
  --muted: #64748b;
  --text: #0f172a;
  --line: #e2e8f0;
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --accent: #f59e0b;
  --surface: #f8fafc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.65;
}
a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(15,23,42,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-header .wrap { display:flex; align-items:center; justify-content:space-between; padding: 16px 0; gap: 16px; }
.brand { color:#fff; font-weight:800; font-size:1.1rem; }
.site-header nav { display:flex; gap:18px; flex-wrap:wrap; }
.site-header nav a { color:#cbd5e1; font-weight:600; }
.hero { background: linear-gradient(135deg, #0f172a 0%, #111827 60%, #1e293b 100%); color:#fff; padding: 64px 0; }
.hero-grid { display:grid; grid-template-columns: 1.35fr .9fr; gap: 28px; align-items: center; }
.eyebrow { letter-spacing: .12em; font-size: .8rem; color:#7dd3fc; font-weight:700; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.6rem); line-height:1.08; margin: 10px 0 16px; }
.lead { font-size: 1.08rem; color:#cbd5e1; max-width: 60ch; }
.hero-actions { display:flex; gap:12px; flex-wrap:wrap; margin-top: 26px; }
.btn { display:inline-block; padding: 14px 18px; border-radius: 14px; font-weight: 700; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); text-decoration:none; }
.btn-secondary { border: 1px solid rgba(255,255,255,.2); color:#fff; }
.btn-secondary:hover { background: rgba(255,255,255,.06); text-decoration:none; }
.btn-accent { background: var(--accent); color:#111827; }
.btn-accent:hover { background:#fbbf24; text-decoration:none; }
.promo-card, .feature-card, .article-card, .article-shell, .cta-banner {
  background: var(--card); border:1px solid var(--line); border-radius: 22px; box-shadow: 0 10px 30px rgba(15,23,42,.06);
}
.promo-card { color:var(--text); padding: 24px; }
.promo-label { display:inline-block; font-size:.75rem; font-weight:800; color:#92400e; background:#fef3c7; padding:6px 10px; border-radius:999px; }
.section { padding: 48px 0; }
.section h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); margin: 0 0 12px; }
.feature-grid, .article-grid { display:grid; gap:20px; }
.feature-grid { grid-template-columns: repeat(3, 1fr); }
.article-grid { grid-template-columns: repeat(2, 1fr); }
.feature-card, .article-card { padding: 22px; }
.article-card h3, .feature-card h3 { margin-top: 0; }
.section-head { margin-bottom: 18px; }
.site-footer { border-top:1px solid var(--line); padding: 28px 0 44px; color: var(--muted); }
.footer-grid { display:grid; grid-template-columns: 1fr 1fr; gap:20px; }
.footer-note { max-width: 50ch; }
.article-page { padding: 42px 0 64px; }
.article-shell { padding: clamp(20px, 4vw, 42px); }
.article-shell h1 { line-height:1.12; font-size: clamp(2rem, 4vw, 3rem); margin-top:0; }
.article-shell h2 { margin-top: 2rem; }
.article-shell ul, .article-shell ol { padding-left: 1.25rem; }
.article-meta { color: var(--muted); margin-bottom: 18px; }
.cta-banner { margin: 28px 0; padding: 20px; display:flex; justify-content:space-between; align-items:center; gap:16px; }
@media (max-width: 900px) {
  .hero-grid, .feature-grid, .article-grid, .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .site-header .wrap { align-items:flex-start; }
  .cta-banner { flex-direction: column; align-items:flex-start; }
  .hero { padding: 44px 0; }
}