:root { --blue: #2563eb; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Rethink Sans', system-ui, -apple-system, sans-serif;
  color: #0f172a;
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
/* Aurora glow */
body::before {
  content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(650px 420px at 84% -6%, rgba(59, 130, 246, 0.16), transparent 60%),
    radial-gradient(600px 420px at 6% 18%, rgba(96, 165, 250, 0.13), transparent 60%);
}
/* Dot grid */
body::after {
  content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.55;
  background-image: radial-gradient(circle at 1px 1px, rgba(15, 23, 42, 0.035) 1px, transparent 0);
  background-size: 26px 26px;
}
.serif { font-family: 'Instrument Serif', Georgia, serif; font-style: italic; font-weight: 400; }

header.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.7); border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}
.nav-in { max-width: 820px; margin: 0 auto; padding: 13px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand img { height: 20px; width: auto; display: block; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: linear-gradient(180deg, #3b82f6, #2563eb); color: #fff;
  font-weight: 700; font-size: 14px; padding: 9px 16px; border-radius: 12px;
  text-decoration: none; box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25); transition: transform 0.15s;
}
.btn:hover { transform: translateY(-1px); }

main { max-width: 760px; margin: 0 auto; padding: 48px 24px 60px; }
.eyebrow {
  display: inline-block; font-size: 12px; font-weight: 700; color: var(--blue);
  background: rgba(37, 99, 235, 0.1); border: 1px solid rgba(37, 99, 235, 0.15);
  padding: 4px 12px; border-radius: 999px;
}
h1 { font-size: 42px; line-height: 1.06; letter-spacing: -0.02em; margin: 16px 0 6px; font-weight: 800; }
.metaline { color: #94a3b8; font-size: 14px; margin-bottom: 20px; }
.lead { font-size: 18px; color: #475569; margin-top: 0; }
.glass {
  background: rgba(255, 255, 255, 0.6); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7); box-shadow: 0 24px 70px -30px rgba(30, 64, 175, 0.3);
  border-radius: 22px; padding: 22px 26px; margin: 26px 0;
}
h2 { font-size: 25px; font-weight: 800; letter-spacing: -0.01em; margin: 40px 0 10px; }
h3 { font-size: 18px; font-weight: 700; margin: 24px 0 6px; }
p { color: #334155; }
ul, ol { color: #334155; padding-left: 22px; }
li { margin: 7px 0; }
a { color: var(--blue); }
strong { color: #0f172a; }
code { background: #f1f5f9; padding: 1px 6px; border-radius: 6px; font-size: 0.92em; }
.callout { border-left: 3px solid var(--blue); background: rgba(59, 130, 246, 0.06); padding: 12px 16px; border-radius: 10px; margin: 18px 0; }

.cta {
  background: linear-gradient(135deg, #1e3a8a, #2563eb); color: #fff;
  border-radius: 26px; padding: 34px; text-align: center; margin: 48px 0 8px;
  box-shadow: 0 30px 70px -30px rgba(37, 99, 235, 0.6);
}
.cta h3 { font-size: 24px; margin: 0 0 8px; color: #fff; }
.cta p { color: rgba(255, 255, 255, 0.82); margin: 0 auto 20px; max-width: 30rem; }
.cta a {
  background: #fff; color: #1d4ed8; font-weight: 700; padding: 13px 24px;
  border-radius: 14px; text-decoration: none; display: inline-block; transition: transform 0.15s;
}
.cta a:hover { transform: translateY(-1px); }

.related { margin-top: 40px; }
.related a { display: block; padding: 4px 0; font-weight: 600; }

footer { border-top: 1px solid #f1f5f9; padding: 28px 24px; text-align: center; color: #94a3b8; font-size: 13px; }
footer a { color: #64748b; text-decoration: none; margin: 0 8px; }

@media (max-width: 600px) {
  h1 { font-size: 31px; }
  main { padding: 34px 20px 48px; }
  h2 { font-size: 22px; }
}