:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #0071e3;
  --border: #d2d2d7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --accent: #2997ff;
    --border: #38383a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent);
}

.container {
  width: min(720px, 92%);
  margin: 0 auto;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.logo {
  margin: 0;
  font-weight: 700;
  font-size: 1.1rem;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

main {
  padding: 2.5rem 0 3rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin: 0 0 0.5rem;
}

.lead {
  font-size: 1.25rem;
  color: var(--muted);
}

.cta-note {
  margin-top: 1.5rem;
  font-weight: 600;
}

.features ul {
  padding-left: 1.25rem;
}

.feature-block {
  margin-top: 2.25rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--border);
}

.feature-block h2 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.feature-block p {
  margin: 0;
  color: var(--muted);
}

.feature-block p + p {
  margin-top: 0.75rem;
}

.site-footer .disclaimer {
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.content-page h1 {
  margin-top: 0;
}

.content-page section {
  margin-top: 2rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0.25rem 0;
}

.site-footer a {
  color: var(--muted);
}