:root {
  --primary: #4A6FA5;
  --primary-dark: #3A5A8C;
  --accent: #6B8F71;
  --bg: #FAFAFA;
  --text: #2C2C2C;
  --text-light: #666;
  --border: #E0E0E0;
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

nav {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

nav .links a {
  color: var(--text-light);
  text-decoration: none;
  margin-left: 24px;
  font-size: 14px;
  font-weight: 500;
}

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

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-top: 40px;
  margin-bottom: 12px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-top: 28px;
  margin-bottom: 8px;
}

p { margin-bottom: 16px; }

ul, ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

li { margin-bottom: 6px; }

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

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

.last-updated {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 32px;
}

footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-light);
  font-size: 13px;
}

.hero {
  text-align: center;
  padding: 80px 24px 48px;
}

.hero h1 {
  font-size: 42px;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: var(--text-light);
  max-width: 540px;
  margin: 0 auto 32px;
}

.hero .cta {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
}

.hero .cta:hover { background: var(--primary-dark); }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  max-width: 800px;
  margin: 0 auto 48px;
  padding: 0 24px;
}

.feature {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature h3 { margin-top: 0; }
.feature p { font-size: 14px; color: var(--text-light); margin-bottom: 0; }

@media (max-width: 600px) {
  .hero h1 { font-size: 28px; }
  nav .links a { margin-left: 16px; font-size: 13px; }
}