:root {
  --bg: #000;
  --text: #fff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.5);
  --accent: #FF6B6B;
  --border: rgba(255, 255, 255, 0.12);
  --surface: rgba(255, 255, 255, 0.04);
}

* { box-sizing: border-box; }

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

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

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

nav.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}

nav.site-nav .brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.01em;
}

nav.site-nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

nav.site-nav ul a {
  color: var(--text-secondary);
  font-size: 15px;
}

nav.site-nav ul a:hover { color: var(--text); text-decoration: none; }

h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 32px 0 16px;
  line-height: 1.15;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 8px;
}

p, ul, ol { color: var(--text-secondary); }
p { margin: 0 0 16px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 6px; }
strong { color: var(--text); font-weight: 600; }

.lede {
  font-size: 19px;
  color: var(--text);
}

.muted { color: var(--text-tertiary); font-size: 14px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 24px 0;
}

hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 48px;
  border-top: 1px solid var(--border);
  color: var(--text-tertiary);
  font-size: 14px;
}

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

@media (max-width: 540px) {
  body { font-size: 16px; }
  h1 { font-size: 28px; }
  h2 { font-size: 20px; }
  nav.site-nav { padding: 20px 16px; }
  nav.site-nav ul { gap: 14px; }
  main { padding: 24px 16px 48px; }
  footer { padding: 24px 16px 36px; }
}