:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #141827;
  --muted: #5f677a;
  --primary: #3f4bb8;
  --accent: #b84a3e;
  --border: #dfe2ef;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1020;
    --surface: #181c31;
    --text: #f7f8ff;
    --muted: #b7bed4;
    --primary: #aab4ff;
    --accent: #ffaa8a;
    --border: #343b5d;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}
header, section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  margin-bottom: 16px;
}
h1, h2 { line-height: 1.2; }
h1 { margin-top: 0; }
a { color: var(--primary); }
.eyebrow {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.muted { color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: 16px; }