:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background: #f8fafc;
}

* { box-sizing: border-box; }
body { margin: 0; }
a { color: #2563eb; }
.container { max-width: 760px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
nav { display: flex; gap: 1.25rem; margin-bottom: 5rem; }
nav a { text-decoration: none; font-weight: 600; }
.hero { padding: 3rem 0; }
.eyebrow, .muted { color: #64748b; }
.eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
h1 { font-size: clamp(2.25rem, 8vw, 4rem); line-height: 1.1; margin: .5rem 0 1rem; }
h2 { margin-top: 2.25rem; line-height: 1.25; }
.lead { font-size: 1.35rem; color: #475569; }
footer { border-top: 1px solid #cbd5e1; margin-top: 3rem; padding-top: 1rem; color: #475569; }

@media (prefers-color-scheme: dark) {
  :root { color: #e5e7eb; background: #111827; }
  .lead, footer { color: #cbd5e1; }
  .eyebrow, .muted { color: #94a3b8; }
  footer { border-color: #374151; }
}