:root {
  --bg: #FAFAFB;
  --card: #FFFFFF;
  --text: #0A0E14;
  --text-secondary: #5B6472;
  --blue-primary: #1E5AFF;
  --blue-deep: #0B2E7A;
  --hairline: #E5E7EB;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0A0E14;
    --card: #141922;
    --text: #F5F7FA;
    --text-secondary: #8B94A3;
    --blue-primary: #3B82F6;
    --hairline: #1F2630;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

header.site {
  padding: 28px 24px 0;
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  font-size: 28px;
  letter-spacing: -0.4px;
  color: var(--text);
  text-decoration: none;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  margin-left: 20px;
  font-size: 14px;
}

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

h1 {
  font-family: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: -0.5px;
  margin: 0 0 12px;
  font-weight: 400;
}

h2 {
  font-family: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  font-size: 28px;
  font-weight: 400;
  margin: 40px 0 12px;
  letter-spacing: -0.3px;
}

h3 {
  font-size: 17px;
  margin: 24px 0 8px;
  font-weight: 600;
}

.tagline {
  color: var(--text-secondary);
  font-size: 18px;
  margin-bottom: 32px;
}

.updated {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
}

p {
  margin: 0 0 14px;
  color: var(--text);
}

ul {
  padding-left: 20px;
  margin: 0 0 16px;
}

li {
  margin-bottom: 6px;
}

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

a:hover {
  text-decoration: underline;
}

.cta {
  display: inline-block;
  background: var(--blue-primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  margin-top: 12px;
}

.cta:hover {
  text-decoration: none;
  opacity: 0.92;
}

footer.site {
  padding: 32px 24px 48px;
  max-width: 720px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 13px;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}