:root {
  color-scheme: dark;
  --bg: #060b18;
  --panel: #0d1526;
  --text: #f8fafc;
  --muted: #94a3b8;
  --line: rgba(255,255,255,.09);
  --blue: #60a5fa;
  --violet: #a78bfa;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(37,99,235,.16), transparent 32rem),
    radial-gradient(circle at 85% 12%, rgba(124,58,237,.12), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.7;
}
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(6,11,24,.88); backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; }
.brand img { width: 36px; height: 36px; border-radius: 10px; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: 14px; color: #cbd5e1; }
.nav-links a { text-decoration: none; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 18px; border-radius: 12px; text-decoration: none; font-weight: 700;
  background: linear-gradient(135deg, #3b82f6, #7c3aed); color: white;
}
.button.secondary { background: rgba(255,255,255,.06); border: 1px solid var(--line); }
.hero { padding: 92px 0 64px; text-align: center; }
.eyebrow { color: var(--blue); font-size: 12px; text-transform: uppercase; letter-spacing: .13em; font-weight: 800; }
h1 { max-width: 900px; margin: 16px auto 22px; font-size: clamp(42px, 7vw, 70px); line-height: 1.06; letter-spacing: -.04em; }
.hero p { max-width: 740px; margin: 0 auto; color: var(--muted); font-size: 19px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; padding: 24px 0 88px; }
.card {
  display: block; padding: 30px; border: 1px solid var(--line); border-radius: 20px;
  background: rgba(255,255,255,.045); text-decoration: none; transition: .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(96,165,250,.4); background: rgba(255,255,255,.065); }
.card.featured { grid-column: 1 / -1; background: linear-gradient(135deg, rgba(37,99,235,.15), rgba(124,58,237,.1)); }
.card h2 { margin: 10px 0; font-size: 24px; line-height: 1.3; }
.card p { margin: 0; color: var(--muted); }
.meta { color: #64748b; font-size: 13px; margin-top: 20px; }
.article-shell { display: grid; grid-template-columns: minmax(0, 760px) 250px; gap: 64px; align-items: start; padding: 72px 0 96px; }
.article h1 { text-align: left; margin: 12px 0 18px; font-size: clamp(38px, 6vw, 60px); }
.lede { color: #cbd5e1; font-size: 20px; margin: 0 0 26px; }
.answer { padding: 24px; border-left: 4px solid var(--blue); border-radius: 0 14px 14px 0; background: rgba(59,130,246,.1); color: #dbeafe; }
.article h2 { margin: 48px 0 14px; font-size: 30px; line-height: 1.25; letter-spacing: -.02em; }
.article h3 { margin: 30px 0 8px; font-size: 21px; }
.article p, .article li { color: #cbd5e1; }
.article li { margin: 8px 0; }
.article strong { color: white; }
.article table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article th, .article td { padding: 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article th { background: rgba(255,255,255,.06); }
.article td { color: #cbd5e1; }
.toc { position: sticky; top: 96px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.035); }
.toc strong { display: block; margin-bottom: 10px; }
.toc a { display: block; color: var(--muted); text-decoration: none; font-size: 14px; padding: 5px 0; }
.cta { margin-top: 54px; padding: 32px; border: 1px solid rgba(96,165,250,.25); border-radius: 20px; background: linear-gradient(135deg, rgba(37,99,235,.16), rgba(124,58,237,.12)); }
.cta h2 { margin-top: 0; }
.related { margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.related a { color: var(--blue); }
footer { border-top: 1px solid var(--line); color: #64748b; font-size: 13px; padding: 30px 0; }
@media (max-width: 820px) {
  .nav-links a:not(.button) { display: none; }
  .grid, .article-shell { grid-template-columns: 1fr; }
  .card.featured { grid-column: auto; }
  .toc { display: none; }
  .hero { padding-top: 64px; }
}