:root {
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --bg: #ffffff;
  --bg-secondary: #f5f5f7;
  --blue: #007aff;
  --purple: #af52de;
  --red: #ff3b30;
  --max-width: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f5f5f7;
    --text-secondary: #98989d;
    --bg: #000000;
    --bg-secondary: #1c1c1e;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px 96px;
}

header {
  margin-bottom: 48px;
}

header .brand {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

h1 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "SF Pro Text", sans-serif;
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 8px 0 16px;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 40px;
  margin-bottom: 12px;
}

p { margin: 12px 0; }

p.lead {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { padding-left: 24px; margin: 12px 0; }
li { margin: 6px 0; }

code, pre {
  font-family: ui-monospace, "SF Mono", Menlo, Monaco, monospace;
  font-size: 0.92em;
  background: var(--bg-secondary);
  padding: 1px 6px;
  border-radius: 4px;
}

nav.footer {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--bg-secondary);
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav.footer a { color: var(--text-secondary); }

.heart { color: var(--red); }