:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --accent: #0066cc;
  --card: #f2f2f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --fg: #f2f2f7;
    --muted: #98989f;
    --accent: #0a84ff;
    --card: #2c2c2e;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
}

.brand a {
  color: inherit;
  text-decoration: none;
}

nav a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
}

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

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

.hero {
  padding: 3rem 0 2rem;
}

.hero h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.125rem;
  color: var(--muted);
}

.testflight {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: var(--card);
  border-radius: 0.75rem;
}

section {
  margin-top: 2.5rem;
}

h2 {
  font-size: 1.375rem;
  margin-bottom: 0.5rem;
}

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

footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--card);
}