:root {
  color-scheme: light dark;
  --bg: #0b1020;
  --card: #141b2d;
  --text: #eef2ff;
  --muted: #b8c1d9;
  --accent: #8ab4ff;
  --line: #2a3550;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  padding: 48px 20px;
  background: radial-gradient(circle at top, #172441 0, var(--bg) 48%);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.card {
  width: min(780px, 100%);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px);
  background: color-mix(in srgb, var(--card) 94%, transparent);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .3);
}

.eyebrow {
  color: var(--accent);
  font-size: .78rem;
  font-weight: 750;
  letter-spacing: .14em;
}

h1 {
  margin: .35rem 0 .7rem;
  font-size: clamp(2rem, 6vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: -.035em;
}

h2 {
  margin: 0 0 .45rem;
  font-size: 1.2rem;
}

.lead {
  margin: 0 0 2.2rem;
  color: var(--muted);
  font-size: 1.1rem;
}

section {
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}

p { margin: .45rem 0; }
ul { margin: .55rem 0 0; padding-left: 1.35rem; }
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
.back { margin-top: 2rem; }

@media (max-width: 560px) {
  body { padding: 18px 12px; }
  .card { border-radius: 14px; }
}