:root {
  --bg: #ffffff;
  --fg: #111827;
  --muted: #4b5563;
  --accent: #4f46e5;
  --accent-fg: #ffffff;
  --surface: #f3f4f6;
  --border: #e5e7eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f1a;
    --fg: #f3f4f6;
    --muted: #9ca3af;
    --accent: #818cf8;
    --accent-fg: #0b0f1a;
    --surface: #131a2a;
    --border: #243049;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: hidden; overflow-x: clip; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
input, select, textarea, button {
  max-width: 100%; min-width: 0; font-size: 1rem; font-family: inherit;
}
.container { width: 100%; max-width: 64rem; margin: 0 auto; padding: 0 1rem; }
.site-header { border-bottom: 1px solid var(--border); }
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem 1rem; padding-top: .75rem; padding-bottom: .75rem; }
.brand { font-weight: 800; font-size: 1.25rem; color: var(--fg); text-decoration: none; }
.nav, .footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem 1rem; }
.nav a, .footer-links a { color: var(--fg); text-decoration: none; }
.nav a:hover, .footer-links a:hover { text-decoration: underline; }
.nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }
.hero { padding: 3rem 0 2.5rem; }
.hero h1 { font-size: clamp(2rem, 7vw, 3.25rem); line-height: 1.15; margin: 0 0 1rem; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 40rem; }
.btn { display: inline-block; padding: .75rem 1.25rem; border-radius: .5rem; background: var(--accent); color: var(--accent-fg); text-decoration: none; font-weight: 600; margin-top: .5rem; }
.section { padding: 2rem 0; }
.grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: .75rem; padding: 1.25rem; }
.card h3 { margin-top: 0; }
.prose { max-width: 44rem; padding: 2rem 0 3rem; }
.prose h1 { margin-top: 0; }
.prose h2 { margin-top: 2rem; }
.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; padding: 2rem 0 1.5rem; background: var(--surface); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
.legal { margin-top: 1.5rem; color: var(--muted); font-size: .9rem; }
@media (min-width: 40rem) {
  .grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
  .footer-links { flex-direction: column; }
}