:root {
  color-scheme: light dark;
  --ink: #172033;
  --muted: #536078;
  --paper: #f7f4ed;
  --card: #ffffff;
  --accent: #225ea8;
  --line: #d8deea;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #eef3ff; --muted: #b7c2d9; --paper: #101522; --card: #171e2e; --line: #303a50; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0 80px; }
nav { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 48px; }
a { color: var(--accent); }
h1 { font-size: clamp(2.1rem, 7vw, 3.4rem); line-height: 1.05; letter-spacing: -0.04em; margin: 0 0 20px; }
h2 { font-size: 1.35rem; margin-top: 36px; }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.lead { color: var(--muted); font-size: 1.18rem; }
.card { background: var(--card); border: 1px solid var(--line); padding: 22px; margin: 24px 0; }
.button { display: inline-block; background: var(--accent); color: white; padding: 11px 16px; text-decoration: none; font-weight: 700; }
li { margin: 8px 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); margin-top: 52px; padding-top: 22px; font-size: .9rem; }