:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1e293b;
  --muted: #64748b;
  --accent: #b45309;
  --button-bg: #0f172a;
  --button-fg: #fbbf24;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --fg: #e2e8f0;
    --muted: #94a3b8;
    --accent: #fbbf24;
    --button-bg: #fbbf24;
    --button-fg: #0f172a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 18px/1.6 Georgia, "Times New Roman", serif;
}
main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}
h1 { font-size: 2.2rem; line-height: 1.2; margin: 0 0 1rem; }
h2 { font-size: 1.3rem; margin: 2.5rem 0 0.5rem; }
.lead { font-size: 1.25rem; font-weight: bold; }
.muted { color: var(--muted); font-size: 0.95rem; }
a { color: var(--accent); }
.button {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border-radius: 0.4rem;
  background: var(--button-bg);
  color: var(--button-fg);
  font-family: system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}
.button:hover, .button:focus { opacity: 0.85; }